CN108714836B - Flexible positioning structure for grinding outer surface channels of slender shaft workpieces - Google Patents
Flexible positioning structure for grinding outer surface channels of slender shaft workpieces Download PDFInfo
- Publication number
- CN108714836B CN108714836B CN201810455215.0A CN201810455215A CN108714836B CN 108714836 B CN108714836 B CN 108714836B CN 201810455215 A CN201810455215 A CN 201810455215A CN 108714836 B CN108714836 B CN 108714836B
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- China
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- workpiece
- supporting
- positioning structure
- grinding
- flexible
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- 238000003825 pressing Methods 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 239000004677 Nylon Substances 0.000 claims description 13
- 229920001778 nylon Polymers 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
- B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a flexible positioning structure for grinding an outer surface channel of an slender shaft workpiece, which comprises the following components: a flexible connection means, a support means and a compression means; the workpiece is locked on the bearing inner ring of the unidirectional needle bearing of the flexible connecting device, is supported by the supporting device in the radial direction of the workpiece, and is pressed by the pressing device. The invention solves the technical problem of providing the flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece, and has the advantages of simple structure, good use stability, low equipment production investment and the like.
Description
Technical Field
The invention relates to a flexible positioning structure used in the production and processing process of a grinding machine, in particular to a flexible positioning structure for grinding an outer surface channel of an slender shaft workpiece.
Background
The outer surface channel of the slender shaft type workpiece is ground, and the slender shaft type workpiece is large in runout and difficult to adjust when rotating, so that a flexible positioning device is required, and a reference is set according to the outer diameter of the workpiece.
However, no flexible positioning device capable of satisfying the above-described grinding requirements has been found in the prior art.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a flexible positioning structure suitable for grinding an outer surface channel of an slender shaft workpiece.
In order to achieve the above object, the present invention provides a flexible positioning structure for grinding an outer surface channel of an elongated shaft workpiece, comprising:
a flexible connection unit, the flexible connection unit comprising:
an end face support base mounted on the spindle and rotated in synchronization with the spindle; a supporting end surface is formed on the end surface supporting seat and is perpendicular to the axis of the main shaft;
one end of the flexible connecting sleeve is fixed on the end face supporting seat, and is annularly distributed on the outer ring of the supporting end face; the axes of the flexible connecting sleeve and the main shaft are coincident;
the bearing seat is arranged at the other end of the flexible connecting sleeve, is provided with a step through hole, and the hole center line of the step through hole coincides with the axis of the main shaft;
and a one-way needle bearing installed in the stepped through hole; the center line of the hole of the bearing inner ring of the unidirectional needle bearing coincides with the axis of the main shaft, and a workpiece clamping position is formed in the bearing inner ring;
a support device, the support device comprising:
a supporting seat which is positioned at one side of the workpiece clamping position and is arranged on the bed body; a supporting installation surface is formed on the supporting seat;
and at least one support block for supporting the workpiece; the supporting block is detachably fixed on the supporting installation surface;
a compression device, the compression device comprising:
a cylinder mounted to the bed;
and a lever hinged to the bed body, one end of which falls on the cylinder rod running track of the cylinder, and the other end of which presses the workpiece on the workpiece holding position when the cylinder rod lifts the corresponding end.
The one-way needle roller bearing is also called a needle roller clutch and consists of a stamped outer ring and a plastic retainer; the retainer can be provided with a plastic reed or a stainless steel reed to guide the rolling needle, and the inclined surface rollaway nest and the rolling needle on the outer ring are used as locking devices, so that the retainer is an existing product.
When the grinding machine combined with the flexible positioning structure grinds the outer surface channel of the slender shaft type workpiece, the tool operation steps of the workpiece are as follows:
and (3) workpiece installation:
firstly, a workpiece is mounted on a workpiece clamping position of a one-way needle bearing, a supporting block of a supporting device is attached to the surface of the workpiece, and the workpiece is supported in the radial direction of the workpiece;
secondly, the cylinder of the pressing device works to drive the corresponding end part of the lever to press the workpiece on the supporting seat; so far, the workpiece is limited in the radial direction;
then, the end face supporting seat of the flexible connecting device is driven by the main shaft of the grinding machine to synchronously rotate in the same direction (for example, clockwise) with the main shaft, the end face supporting seat drives the bearing seat to rotate in the same direction through the flexible connecting sleeve, so that the unidirectional needle roller bearing in the bearing seat locks the workpiece in one direction (namely, clockwise), at the moment, the flexible connecting sleeve can twist in the rotating direction, so that a traction force for pulling the workpiece to the end face supporting seat is applied to the workpiece, the workpiece moves towards the end face supporting seat until the end face of the workpiece is propped against the supporting end face of the end face supporting seat, and the limiting of the workpiece is completed in the axial direction;
finally, measuring the circle runout of the rotating workpiece by using a dial indicator or a dial indicator; if the measured values are consistent, the workpiece is subjected to next grinding processing; if the measured values do not accord with each other, the radial supporting height of the supporting seat to the workpiece is adjusted, and the steps are repeated again until the measured value of the circle run-out meets the processing requirement;
disassembling a workpiece:
after the external surface channel of the workpiece is ground, the workpiece can be smoothly detached from the one-way needle bearing only by rotating the main shaft of the grinding machine in the opposite direction (namely in the anticlockwise direction) until the one-way needle bearing is unlocked.
Further, the invention provides a flexible positioning structure for grinding an outer surface channel of an elongated shaft workpiece, which further comprises:
the adjusting blocks correspond to the supporting blocks one by one, and each group of the corresponding supporting blocks and the adjusting blocks are fixed on the supporting installation surface of the supporting seat through screws.
Preferably, a single supporting block corresponds to a plurality of adjusting blocks, and the thickness of the plurality of adjusting blocks is different.
According to the technical scheme of the further improvement, the height of the supporting blocks can be conveniently adjusted by replacing the adjusting blocks with different thicknesses, and each group of corresponding adjusting blocks and supporting blocks are fixed on the supporting installation surface of the supporting seat through screws, so that the supporting seat is good in structural stability and connection strength.
In order to facilitate the unloading rod (generally adopting a round steel wire) on the main shaft of the grinding machine to conveniently pass through the end surface supporting seat and then finish the unloading operation on the workpiece on the unidirectional needle roller bearing, the end surface supporting seat is provided with a through hole for the unloading rod to penetrate through and communicated with the bearing inner ring of the unidirectional needle roller bearing.
In order to avoid the lever of the pressing device from scratching the surface of a workpiece, a nylon pressing block is fixed on one end of the lever, the nylon pressing block is pressed on the workpiece at the workpiece clamping position, the workpiece is made of metal (usually iron), the nylon pressing block on the lever is directly pressed on the workpiece in consideration of different hardness of the material, mechanical damage to the surface of the rotating workpiece is avoided, and meanwhile, the mechanical abrasion loss generated by the nylon pressing block is relatively small due to the abrasion resistance of the nylon material of the nylon pressing block, and the service life is relatively long.
Compared with the prior art, the flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece has the following advantages:
1. the invention provides a flexible positioning structure which is very suitable for grinding an outer surface channel of an slender shaft workpiece;
2. the flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece has the advantages of simple structure, good use stability, low equipment production investment and the like.
Drawings
FIG. 1 is a cross-sectional view of a flexible positioning structure for grinding an outer surface channel of an elongated shaft-like workpiece according to embodiment 1;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;
FIG. 3 is a side view of a flexible positioning structure for grinding an outer surface channel of an elongated shaft-like workpiece according to embodiment 1;
FIG. 4 is an enlarged partial schematic view at B in FIG. 3;
FIG. 5 is a side view (with partial cross-sectional structure) of a flexible positioning structure for grinding an outer surface channel of an elongated shaft-like workpiece according to example 1;
FIG. 6 is an enlarged partial schematic view at C in FIG. 5;
FIG. 7 is a partial schematic view of a flexible positioning structure for grinding an outer surface channel of an elongated shaft workpiece according to embodiment 2;
fig. 8 is a partial schematic view of a flexible positioning structure for grinding an outer surface channel of an elongated shaft workpiece according to embodiment 3.
In the figure: the end face supporting seat 1, the supporting end face 1-1, the through hole 1-2, the main shaft 2, the flexible connecting sleeve 3, the bearing seat 4, the step through hole 4-1, the one-way needle roller bearing 5, the workpiece 6, the supporting seat 7, the supporting installation face 7-1, the bed body 8, the supporting block 9, the cylinder 10, the cylinder rod 10-1, the cylinder bracket 11, the lever 12, the adjusting block 13, the nylon pressing block 14 and the rotating shaft 15.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1:
as shown in fig. 1 to 6, the flexible positioning structure for grinding an outer surface channel of an elongated shaft workpiece according to this embodiment includes:
a flexible connection unit, the flexible connection unit comprising:
an end face supporting seat 1, wherein the end face supporting seat 1 is arranged on the end face of the main shaft 2 through a screw, and the end face supporting seat and the screw synchronously rotate; a supporting end face 1-1 is formed on the end face supporting seat 1, and the supporting end face 1-1 is perpendicular to the axis of the main shaft 2; a flexible connecting sleeve 3, wherein one end of the flexible connecting sleeve 3 is fixed on the end face supporting seat 1, and is annularly distributed on the outer ring of the supporting end face 1-1; the axes of the flexible connecting sleeve 3 and the main shaft 2 are coincident; a bearing seat 4, the bearing seat 4 is installed at the other end of the flexible connecting sleeve 3, the bearing seat 4 is provided with a step through hole 4-1, and the hole center line of the step through hole 4-1 coincides with the axis of the main shaft 2; and, a one-way needle bearing 5, the one-way needle bearing 5 is installed in the above-mentioned step through hole 4-1; the center line of the hole of the bearing inner ring of the unidirectional needle bearing 5 coincides with the axis of the main shaft 2, and a workpiece 6 clamping position is formed in the bearing inner ring;
a support device, the support device comprising:
a supporting seat 7, the supporting seat 7 is positioned at one side of the clamping position of the workpiece 6 and is mounted on the bed body 8; the supporting seat 7 is provided with a supporting installation surface 7-1; and a pair of support blocks 9 each for supporting the work piece 6, the support blocks 9 being mounted to the support mounting surface 7-1 by screws;
a compression device, the compression device comprising:
a cylinder 10, the cylinder 10 is mounted to the bed 8 through a cylinder bracket 11; and a lever 12 hinged to the bed 8 through a rotation shaft 15, one end of the lever 12 falling on the running track of the cylinder rod 10-1 of the cylinder 10, and the other end of the lever 12 pressing the workpiece 6 at the clamping position of the workpiece 6 when the cylinder rod 10-1 lifts the corresponding end;
in order to facilitate the unloading rod on the main shaft 2 of the grinding machine to pass through the end face supporting seat 1 conveniently, and then finish the unloading operation on the workpiece 6 on the unidirectional needle bearing 5, as shown in fig. 2, in this embodiment, a through hole 1-2 for the unloading rod to pass through is arranged on the end face supporting seat 1 and is communicated with the bearing inner ring of the unidirectional needle bearing 5.
When the grinding machine combined with the flexible positioning structure grinds the outer surface channel of the slender shaft type workpiece, the tooling operation steps of the workpiece 6 are as follows:
and (3) mounting a workpiece 6:
firstly, a workpiece 6 is mounted on a workpiece 6 clamping position of a one-way needle bearing 5, a supporting block 9 of a supporting device is attached to the surface of the workpiece 6, and the workpiece 6 is supported in the radial direction of the workpiece 6;
secondly, the cylinder 10 of the pressing device works to drive the corresponding end part of the lever 12 to press the workpiece 6 on the supporting seat 7; so far, the workpiece 6 is limited in the radial direction;
then, the grinding machine spindle 2 drives the end face supporting seat 1 of the flexible connecting device to rotate synchronously and in the same direction with the spindle 2 (for example, the end face supporting seat 1 drives the bearing seat 4 to rotate in the same direction through the flexible connecting sleeve 3, so that the unidirectional needle roller bearing 5 in the bearing seat 4 locks the workpiece 6 in one direction (namely, the clockwise direction), at the moment, the flexible connecting sleeve 3 can twist in the rotating direction, so that a traction force for pulling the workpiece 6 to the end face supporting seat 1 is applied to the workpiece 6, the workpiece 6 moves towards the end face supporting seat 1 until the end face of the workpiece 6 is propped against the supporting end face 1-1 of the end face supporting seat 1, and the limiting of the workpiece 6 in the axial direction is completed;
finally, the circle run-out of the rotating workpiece 6 is measured by marking the dial indicator or dial indicator; if the measured values are consistent, the workpiece 6 is subjected to the next grinding processing; if the measured values do not accord with each other, the radial supporting height of the supporting seat 7 on the workpiece 6 is adjusted, and the steps are repeated again until the measured values of the circle run-out meet the processing requirements;
disassembling a workpiece 6:
after the external surface channel of the workpiece 6 is ground, the workpiece 6 can be smoothly detached from the unidirectional needle bearing 5 only by rotating the main shaft 2 of the grinding machine in the opposite direction (namely, anticlockwise) until the unidirectional needle bearing 5 is unlocked.
Example 2:
the general structure of the flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece provided in this embodiment is the same as that of embodiment 1, as shown in fig. 7, but the flexible positioning structure provided in this embodiment further includes: the adjusting blocks 13 of the supporting blocks 9 are corresponding one by one, and each group of the corresponding supporting blocks 9 and 13 is fixed on the supporting installation surface 7-1 of the supporting seat 7 through screws. In addition, the single supporting block 9 corresponds to a plurality of adjusting blocks 13, the thicknesses of the plurality of adjusting blocks 13 are different, the height of the supporting block 9 is adjusted by replacing the adjusting blocks 13, and each group of corresponding adjusting blocks 13 and supporting blocks 9 are fixed on the supporting installation surface 7-1 of the supporting seat 7 through screws, so that the supporting seat has good structural stability and connection strength.
Example 3:
in the flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece provided in this embodiment, the general structure is consistent with that of embodiment 2, but in order to avoid the lever 12 of the pressing device from scratching the surface of the workpiece 6, as shown in fig. 8, a nylon pressing block 14 is fixed on one end of the lever 12 in this embodiment, the nylon pressing block 14 presses the workpiece 6 on the clamping position of the workpiece 6, because the workpiece 6 is made of metal, the nylon pressing block 14 on the lever 12 directly presses the workpiece 6 in consideration of different hardness of the material, mechanical damage is not generated on the surface of the rotating workpiece 6, and meanwhile, because of the wear resistance of the nylon pressing block 14 itself, the mechanical abrasion amount generated by itself is relatively small, and the service life is relatively long.
Claims (4)
1. A flexible positioning structure for grinding an outer surface channel of an slender shaft workpiece is characterized by comprising:
a flexible connection unit, the flexible connection unit comprising:
an end face support base mounted on the spindle and rotated in synchronization with the spindle; a supporting end surface is formed on the end surface supporting seat and is perpendicular to the axis of the main shaft;
one end of the flexible connecting sleeve is fixed on the end face supporting seat, and is annularly distributed on the outer ring of the supporting end face; the axes of the flexible connecting sleeve and the main shaft are coincident;
the bearing seat is arranged at the other end of the flexible connecting sleeve, is provided with a step through hole, and the hole center line of the step through hole coincides with the axis of the main shaft;
and a one-way needle bearing installed in the stepped through hole; the center line of the hole of the bearing inner ring of the unidirectional needle bearing coincides with the axis of the main shaft, and a workpiece clamping position is formed in the bearing inner ring;
a support device, the support device comprising:
a supporting seat which is positioned at one side of the workpiece clamping position and is arranged on the bed body; a supporting installation surface is formed on the supporting seat;
and at least one support block for supporting the workpiece; the supporting block is detachably fixed on the supporting installation surface;
a compression device, the compression device comprising:
a cylinder mounted to the bed;
and a lever hinged to the bed body, one end of which falls on the cylinder rod running track of the cylinder, and the other end of which presses the workpiece on the workpiece holding position when the cylinder rod lifts the corresponding end;
further comprises: the adjusting blocks correspond to the supporting blocks one by one, and each group of the corresponding supporting blocks and the adjusting blocks are fixed on the supporting installation surface of the supporting seat through screws.
2. The flexible positioning structure for grinding the outer surface channels of the slender shaft workpieces according to claim 1, wherein a single supporting block corresponds to a plurality of adjusting blocks, and the thickness of the adjusting blocks is different.
3. The flexible positioning structure for grinding the outer surface channel of the slender shaft workpiece according to claim 1 or 2, wherein the end surface supporting seat is provided with a through hole for the discharge rod to penetrate through and communicated with the bearing inner ring of the unidirectional needle bearing.
4. A flexible positioning structure for grinding an outer surface channel of an elongated shaft-like workpiece according to claim 3, wherein a nylon pressing block is fixed to one end of said lever, and said nylon pressing block presses the workpiece at the workpiece holding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455215.0A CN108714836B (en) | 2018-05-14 | 2018-05-14 | Flexible positioning structure for grinding outer surface channels of slender shaft workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455215.0A CN108714836B (en) | 2018-05-14 | 2018-05-14 | Flexible positioning structure for grinding outer surface channels of slender shaft workpieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108714836A CN108714836A (en) | 2018-10-30 |
| CN108714836B true CN108714836B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810455215.0A Active CN108714836B (en) | 2018-05-14 | 2018-05-14 | Flexible positioning structure for grinding outer surface channels of slender shaft workpieces |
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| Country | Link |
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| CN (1) | CN108714836B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932487A (en) * | 2022-07-25 | 2022-08-23 | 苏州铁近机电科技股份有限公司 | Bearing inner race groove grinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1178460A (en) * | 1982-12-03 | 1984-11-27 | Arthur W. Wright | Rotary holding tool |
| CN101417409A (en) * | 2007-10-23 | 2009-04-29 | 王德军 | Grinding machine charging and discharging mechanism |
| CN103537969A (en) * | 2013-10-22 | 2014-01-29 | 浙江省新昌新轴实业有限公司 | Water pump shaft grinding device and process |
| CN203765458U (en) * | 2014-01-21 | 2014-08-13 | 濮阳贝英数控机械设备有限公司 | Long rod shaft double channel grinding supporting device of thread spinner and water pump bearings |
| CN205009051U (en) * | 2015-09-29 | 2016-02-03 | 洛阳轴研科技股份有限公司 | Use driver plate device in grinding of rigid shaft class part hole |
| CN105619114A (en) * | 2016-02-22 | 2016-06-01 | 扬州工业职业技术学院 | Curved-face self-centering clamp |
| CN207326511U (en) * | 2017-07-28 | 2018-05-08 | 浙江精友汽配有限公司 | A kind of optical axis clamp system |
| CN208811777U (en) * | 2018-05-14 | 2019-05-03 | 宁波明润机械制造有限公司 | A kind of flexible positioning structure of the outer surface channel grinding of thin and long shafts workpiece |
-
2018
- 2018-05-14 CN CN201810455215.0A patent/CN108714836B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1178460A (en) * | 1982-12-03 | 1984-11-27 | Arthur W. Wright | Rotary holding tool |
| CN101417409A (en) * | 2007-10-23 | 2009-04-29 | 王德军 | Grinding machine charging and discharging mechanism |
| CN103537969A (en) * | 2013-10-22 | 2014-01-29 | 浙江省新昌新轴实业有限公司 | Water pump shaft grinding device and process |
| CN203765458U (en) * | 2014-01-21 | 2014-08-13 | 濮阳贝英数控机械设备有限公司 | Long rod shaft double channel grinding supporting device of thread spinner and water pump bearings |
| CN205009051U (en) * | 2015-09-29 | 2016-02-03 | 洛阳轴研科技股份有限公司 | Use driver plate device in grinding of rigid shaft class part hole |
| CN105619114A (en) * | 2016-02-22 | 2016-06-01 | 扬州工业职业技术学院 | Curved-face self-centering clamp |
| CN207326511U (en) * | 2017-07-28 | 2018-05-08 | 浙江精友汽配有限公司 | A kind of optical axis clamp system |
| CN208811777U (en) * | 2018-05-14 | 2019-05-03 | 宁波明润机械制造有限公司 | A kind of flexible positioning structure of the outer surface channel grinding of thin and long shafts workpiece |
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| Publication number | Publication date |
|---|---|
| CN108714836A (en) | 2018-10-30 |
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