CN204413693U - A kind of Rectangular Spring knife rest clamping device - Google Patents
A kind of Rectangular Spring knife rest clamping device Download PDFInfo
- Publication number
- CN204413693U CN204413693U CN201420523112.0U CN201420523112U CN204413693U CN 204413693 U CN204413693 U CN 204413693U CN 201420523112 U CN201420523112 U CN 201420523112U CN 204413693 U CN204413693 U CN 204413693U
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- China
- Prior art keywords
- knife rest
- rectangular spring
- main shaft
- pull bar
- spring
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- 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.)
- Expired - Fee Related
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Abstract
A kind of Rectangular Spring knife rest clamping device, comprise main shaft and knife rest, described knife rest is arranged in the taper hole of main shaft, in described main shaft, pull bar is installed, blind rivet and steel ball are installed between described pull bar and taper hole, it is characterized in that: described drag link sleeve is in Rectangular Spring, and the cross section of described Rectangular Spring is rectangle, and the internal diameter of Rectangular Spring and the external diameter difference of pull bar are less than 0.05 millimeter.The utility model by drag link sleeve in Rectangular Spring, Rectangular Spring high life, bearing capacity is strong, less space can be set, due to rectangular in cross-section, Min. more easily can be accomplished in the gap between the external diameter of its internal diameter and pull bar, can better vibration-inhibition, and steadily of centre of gravity, the gap allowing skew is minimum.
Description
Technical field
The utility model relates to the clamping device that high speed drill attacks center machine tool, is specifically related to a kind of Rectangular Spring knife rest clamping device.
Background technology
Bore the High Rotation Speed of attacking center machine tool main shaft, carry out machining by the clamping device carry its tools being arranged on knife rest in main shaft, knife rest is by the spring-compressed release on main shaft draw-in bar, and resilience clamps.The vibrations that the High Rotation Speed of main shaft produces can affect machining accuracy, and the clamping of knife rest can make knife rest and main shaft contact surface cause irregular wear with unclamping, and makes the axis of knife rest and main shaft be difficult to ensure on the same line, machining accuracy reduction; Spring compression repeatedly and resilience can make the bearing capacity of spring and life-span reduce gradually, and the elastic force direction skew of spring, adds carriage and main shaft contact surface abrasion further.In order to ensure that high speed, high-precision cooked mode need to design more reasonably structure to the clamping device of knife rest in main shaft.
At present, knife rest clamping device on market makes knife rest carry out discharging by butterfly spring and clamps, very little space can be set, there is enough strong elastic force, but also there is following defect: the flexible stroke between multiple butterfly spring has difference, make its local there is stress excessive, affect service life; Butterfly spring slides and has larger friction on pull bar, is unfavorable for stretching and resilience.
Mention in the patent No. 200510093885.5 and use a kind of double-helix spring, cross section is circular, makes the gap between spring and pull bar become fully little, and obtains the chucking power equal with butterfly spring.But owing to being double-spring structure, pitch must strengthen, single spring capacity declines, two springs cannot accomplish that length is consistent, bearing capacity is consistent, always cause discontinuity, stressed many on one side, stressed few on one side, the tightening force of cutter setting frame is also uneven, impartial elastic force cannot be provided, and two springs add and can not ensure all radial concentric man-hour, even if with cylindrical location mill endoporus, again with Internal hole positioning, because the internal-and external diameter error of two springs is inevitable, location is caused always to have deviation, processing is the difficult decentraction eliminating internal-and external diameter also, the axiality of assembling rear two springs is just more difficult accomplishes, even if play table with external diameter, also beat inaccurate because of original internal-and external diameter decentraction, in this Patent design, accurately machined effect has just beaten very heavy discount like this, moreover need to allow two springs be 180 ° in assembling process to be arranged symmetrically with, can only with visually observing, do not accomplish precisely, moreover in the process of lock screw, along with the rotation of nut, contact end face also inevitably deflects certain angle under frictional force effect, can not accomplish especially to design the symmetrical of coideal, can affect in the High Rotation Speed of main shaft, easily pull bar is impacted, while increasing wearing and tearing, also noise can be strengthened, cause comparatively big bang.
Summary of the invention
The purpose of this utility model is the shortcoming and defect overcoming prior art, provides the Rectangular Spring knife rest clamping device that a kind of structure is simple, machining accuracy is high.
For realizing above object, technical solution of the present utility model is: a kind of Rectangular Spring knife rest clamping device, comprise main shaft and knife rest, described knife rest is arranged in the taper hole of main shaft, in described main shaft, pull bar is installed, blind rivet and steel ball is installed between described pull bar and taper hole, it is characterized in that: described drag link sleeve is in Rectangular Spring, the cross section of described Rectangular Spring is rectangle, and the internal diameter of Rectangular Spring and the external diameter difference of pull bar are less than 0.05 millimeter.
Rectangular Section Spring can produce large deflection.In same space, square sectional wire spring bearing capacity is than circular section spring height 43-48%.Obviously, Rectangular Spring is greater than more than 50%.Under the same conditions, parallel wire spring will improve 13%-14% than the life-span of circular section wire spring.
The conical surface of described taper hole is interrupted face, and the conical surface of taper hole and knife rest are three point contact.
Described knife rest is provided with boss, and described boss is stuck on the main shaft shaft shoulder, and the distance between boss and the main shaft shaft shoulder was between 0.01mm ~ 0.025mm before cutter is strained.
Described Rectangular Spring two ends also tightly polish, and pitch is impartial, can provide the elastic force of balance and stability.
Described Rectangular Spring is provided with check ring near one end of taper hole.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model by drag link sleeve in Rectangular Spring, Rectangular Spring high life, bearing capacity is strong, less space can be set, due to rectangular in cross-section, Min. more easily can be accomplished in the gap between the external diameter of its internal diameter and pull bar, can better vibration-inhibition, and steadily of centre of gravity, the gap allowing skew is minimum.
2, in the utility model, the conical surface of spindle taper hole is interrupted face, three point contact, all the other empty avoidings, makes the axis of the axis of main shaft and knife rest not be subject to the impact of clamping and contact surface abrasion, keeps on the same line.
3, in the utility model, Rectangular Spring two ends also tightly polish, and tightly can increase end face support, can better ensure under stress, make the center of gravity of spring on shaft core position, both ends of the spring face and two ends counterpart end face are Full connected, and the cross section of spring is stressed more evenly, stable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: main shaft 1, knife rest 2, taper hole 3, pull bar 4, blind rivet 5, steel ball 6, Rectangular Spring 7, boss 8, the main shaft shaft shoulder 9, check ring 10.
Fig. 2 double-helix spring structure contrast figure.
Detailed description of the invention
Illustrate below in conjunction with accompanying drawing and with detailed description of the invention, the utility model to be described in further detail.
See Fig. 1, a kind of Rectangular Spring knife rest clamping device, comprise main shaft 1 and knife rest 2, described knife rest 2 is arranged in the taper hole 3 of main shaft 1, in described main shaft 1, pull bar 4 is installed, blind rivet 5 and steel ball 6 are installed between described pull bar 4 and taper hole 3, described pull bar 4 is enclosed within Rectangular Spring 7, the cross section of described Rectangular Spring 7 is rectangle, the internal diameter of Rectangular Spring 7 and the external diameter difference of pull bar 4 are less than 0.05 millimeter, described Rectangular Spring 7 is provided with check ring 10 near one end of taper hole 3, is used for limiting the displacement of Rectangular Spring 7.
Described Rectangular Spring 7 two ends also tightly polish, because and the tight end face that could increase supports, get Geng Ping could be ground, more with the axis perpendicular of spring, just can better ensure under stress, make the center of gravity of spring on shaft core position, both ends of the spring face and two ends counterpart end face are Full connected, the cross section of spring is stressed more even, stable, the processing of single spring can ensure an excircle orientation mill endoporus preferably, heart axis hole location mill cylindrical, single spring just can ensure to play table with honed outer round surface when assembling, correcting spring entirety is concentric with pull bar, thus better solve eccentricity issues, vibrations when solving the uneven High Rotation Speed brought and noise, especially the speed of mainshaft to turn left right highly significant 20,000.
The conical surface of described taper hole 3 is interrupted face, the conical surface and the knife rest 2 of taper hole 3 are three point contact, on its conical surface, numerous cross section can be three point contact with the interrupted face in taper hole, only need two and to contact completely above in theory, this structural design has considered wearing and tearing and service life, even if after dismounting repeatedly and clamping cause wearing and tearing, also have more point can contact completely, do not affect assembly precision completely, and there is automatic compensation function, wear away a point, new difference can be occurred on same cross section again.
The conical surface of described knife rest 2 and the main shaft shaft shoulder 9 are abutted against to touch to grind and are processed, described knife rest 2 is provided with boss 8, described boss 8 is stuck on the main shaft shaft shoulder 9, the distance between boss 8 and the main shaft shaft shoulder 9 between 0.01mm ~ 0.025mm, to ensure high-precision processing and assembling.
The utility model operationally utilizes the compression and tension of Rectangular Spring 7 realize the clamping of knife rest 2 by the blind rivet 5 be connected on knife rest 2 and unclamp, Rectangular Spring 7 realizes compression and tension by main shaft connector, limited by check ring 10, when pull bar 4 is pushed down, pull bar 4 and the steel ball 6 on blind rivet 5 contact surface are shifted onto in cannelure and keep stable, when pull bar 4 is pushed into, steel ball 6 exits in groove, and by the screen resilience of Rectangular Spring 7 and spindle taper hole 3, knife rest 2 is clamped.Thus the axis of knife rest 2 and the axis of main shaft 1 are kept point-blank, ensure relatively stable.
Claims (4)
1. a Rectangular Spring knife rest clamping device, comprise main shaft (1) and knife rest (2), described knife rest (2) is arranged in the taper hole (3) of main shaft (1), pull bar (4) is installed in described main shaft (1), blind rivet (5) and steel ball (6) are installed between described pull bar (4) and taper hole (3), it is characterized in that: described pull bar (4) is enclosed within Rectangular Spring (7), the cross section of described Rectangular Spring (7) is rectangle, and the internal diameter of Rectangular Spring (7) and the external diameter difference of pull bar (4) are less than 0.05 millimeter.
2. Rectangular Spring knife rest clamping device according to claim 1, is characterized in that: the conical surface of described taper hole (3) is interrupted face, and the conical surface and the knife rest (2) of taper hole (3) are three point contact.
3. Rectangular Spring knife rest clamping device according to claim 1, it is characterized in that: described knife rest (2) is provided with boss (8), described boss (8) is stuck on the main shaft shaft shoulder (9), distance in processing between boss (8) and the main shaft shaft shoulder (9), between 0.01mm ~ 0.025mm, is beneficial to pulling force when controlling clamp-on tool.
4. Rectangular Spring knife rest clamping device according to claim 1, is characterized in that: described Rectangular Spring (7) two ends also tightly polish, and pitch is impartial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420523112.0U CN204413693U (en) | 2014-09-12 | 2014-09-12 | A kind of Rectangular Spring knife rest clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420523112.0U CN204413693U (en) | 2014-09-12 | 2014-09-12 | A kind of Rectangular Spring knife rest clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204413693U true CN204413693U (en) | 2015-06-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420523112.0U Expired - Fee Related CN204413693U (en) | 2014-09-12 | 2014-09-12 | A kind of Rectangular Spring knife rest clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204413693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968088A (en) * | 2019-04-16 | 2019-07-05 | 东创智能装备(深圳)有限公司 | A kind of dedicated permanent magnet synchronization motor spindle of longitudinal cutting machine tool |
-
2014
- 2014-09-12 CN CN201420523112.0U patent/CN204413693U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109968088A (en) * | 2019-04-16 | 2019-07-05 | 东创智能装备(深圳)有限公司 | A kind of dedicated permanent magnet synchronization motor spindle of longitudinal cutting machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 432700 Guangshui City, Suizhou province should be located in the industrial park, ten mile road, No., No. 8, -3 Patentee after: HUBEI YIXING INTELLIGENT EQUIPMENT CO.,LTD. Address before: 432700 Guangshui City, Suizhou province should be located in the industrial park, ten mile road, No., No. 8, -3 Patentee before: HUBEI YIXING MACHINE TOOL Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20210912 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |