CN113798935A - Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine - Google Patents
Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine Download PDFInfo
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- CN113798935A CN113798935A CN202011620587.8A CN202011620587A CN113798935A CN 113798935 A CN113798935 A CN 113798935A CN 202011620587 A CN202011620587 A CN 202011620587A CN 113798935 A CN113798935 A CN 113798935A
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- 210000000078 claw Anatomy 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims description 5
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- 230000004323 axial length Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 241000287828 Gallus gallus Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
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- 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
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- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/35—Accessories
- B24B5/355—Feeding means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
本发明公开了一种外圆磨床自补偿式浮动三爪动力工件夹持装置，包括磨床主轴死顶尖，磨床主轴死顶尖的外侧套接有轴承套，轴承套的外侧套接有单向轴承，单向轴承的外侧固定套接有中间环，中间环的外侧转动套接有滚子轴承，滚子轴承的外侧转动套接有卡盘壳体；卡盘壳体的一端面固定连接有后封盖，卡盘壳体的另一端面固定连接有环形的卡盘，卡盘的内侧设置有浮动盘，浮动盘的外端面上转动连接有三个均匀分布的卡爪；三个卡爪相互靠近的侧面为对数曲线型的弧形凸面。本发明在保证加工精度和稳定性的前提下，提高了磨床夹具的自动化水平，通过夹爪线型的优化，提高了自动化加工中换产的方便性和夹具夹持的稳定性。
The invention discloses a self-compensating floating three-jaw dynamic workpiece clamping device for a cylindrical grinding machine, which comprises a dead center of a main shaft of a grinder, a bearing sleeve is sleeved on the outer side of the dead center of the main shaft of the grinder, and a one-way bearing is sleeved on the outer side of the bearing sleeve. The outer side of the one-way bearing is fixedly sleeved with an intermediate ring, the outer side of the intermediate ring is rotated and sleeved with a roller bearing, and the outer side of the roller bearing is rotated and sleeved with a chuck shell; one end face of the chuck shell is fixedly connected with a back seal A ring-shaped chuck is fixedly connected to the other end face of the chuck shell, a floating disc is arranged on the inner side of the chuck, and three evenly distributed claws are rotatably connected on the outer end face of the floating disc; the three claws are close to each other. The sides are logarithmic curved convex surfaces. The invention improves the automation level of the grinder fixture under the premise of ensuring the machining accuracy and stability, and improves the convenience of changing production and the clamping stability of the fixture through the optimization of the clamping jaw line type.
Description
Technical Field
The invention relates to the field of grinding clamps, in particular to a self-compensation type floating three-jaw power workpiece clamping device for a cylindrical grinding machine.
Background
The workpiece clamping device of the conventional cylindrical grinding machine generally utilizes a heart-shaped chuck to manually clamp the workpiece before the workpiece is arranged on a machine tool, the workpiece with the heart-shaped chuck is arranged on two tops of the grinding machine again, the heart-shaped chuck and the workpiece are driven to rotate together through a headstock deflector rod, and the angular positions of the heart-shaped chuck and the headstock deflector rod need to be considered during installation. The conventional chicken heart chuck adopts a circular eccentric cam to clamp a workpiece, and the clamping range is small under the condition of no manual adjustment. For the machine tool robot automatic loading and unloading system which is developed day by day, the traditional clamping mode can not be conveniently applied to the machine tool robot automatic loading and unloading system, and the application and popularization of the grinding machine robot automatic loading and unloading system are greatly retarded.
With the numerical control of various machining equipment, the continuous improvement of domestic labor cost and the upgrading and updating requirements of enterprises, the automation of machining enterprises, especially the machining automation of automobile part enterprises, is urgent. Numerical control lathes, various machining centers and the like are widely applied to various industries due to automatic modification of clamps and convenience of new installation. However, due to the particularity of the clamp of the grinding machine, the chicken heart chuck is not easy to replace, so that the feeding and discharging automation of the cylindrical grinding machine is always in a standstill.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a self-compensating floating three-jaw power workpiece clamping device of a cylindrical grinding machine, wherein equipment is arranged at a headstock of the grinding machine and fixed on a dead center of a main shaft of the main shaft grinding machine, the equipment is driven by the headstock to rotate, a clamp floats to clamp a workpiece to rotate along with the headstock in positive rotation, and the clamp is opened in reverse rotation to load and unload the workpiece; under the condition that the existing mechanical structure of the grinding machine is not changed and the machining precision of a machine tool is not influenced, the automatic clamping and loosening of the workpiece of the grinding machine are realized, and the automatic feeding and discharging transformation of the grinding machine is completed by matching with a feeding and discharging system of a machine tool robot.
In order to realize the effect, the invention adopts the technical scheme that:
a self-compensating floating three-jaw power workpiece clamping device of a cylindrical grinding machine comprises a grinding machine main shaft dead center, wherein a bearing sleeve is sleeved on the outer side of the grinding machine main shaft dead center, a one-way bearing is sleeved on the outer side of the bearing sleeve, an intermediate ring is fixedly sleeved on the outer side of the one-way bearing, a roller bearing is rotatably sleeved on the outer side of the intermediate ring, a chuck shell is rotatably sleeved on the outer side of the roller bearing, and at least one tension spring is fixedly connected between the inner wall of the chuck shell and the outer wall of the intermediate ring;
one end face of the chuck shell is fixedly connected with a rear sealing cover in transmission connection with a shifting lever of the grinding machine headstock, the other end face of the chuck shell is fixedly connected with an annular chuck, a floating disc is arranged on the inner side of the chuck, three clamping jaws which are uniformly distributed are rotatably connected to the outer end face of the floating disc, and the other end of each clamping jaw is movably connected to the outer end face of the chuck;
the side surfaces of the three clamping jaws, which are close to each other, are arc convex surfaces in a logarithmic curve shape;
the outer side of the bearing sleeve is movably sleeved with a pressing ring, the inner side end of the pressing ring is in threaded connection with the inner wall of the middle ring, and the inner wall of the pressing ring is movably attached to the outer end faces of the one-way bearing and the floating disc respectively.
Furthermore, a locking screw is arranged in the side wall of the bearing sleeve, and the end part of the locking screw penetrates through the bearing sleeve and is tightly propped against the side surface of the dead center of the grinding machine spindle.
Furthermore, the length of the end part of the bearing sleeve positioned on the outer side of the one-way bearing is larger than the axial length of the pressure ring.
Furthermore, a positioning flange positioned between the chuck shell and the rear sealing cover is arranged on the outer circular surface of the bearing sleeve.
Furthermore, three first pin shafts are uniformly arranged on the end face, close to the middle ring, of the floating disc, floating insertion holes corresponding to the first pin shafts are formed in the end face of the middle ring, and the inner diameter of each floating insertion hole is larger than the outer diameter of each first pin shaft.
Furthermore, three second pin shafts are fixedly arranged on the outer end face of the floating disc, and one end of the clamping jaw is rotatably connected to the outer sides of the second pin shafts;
the outer end face of the chuck is fixedly provided with three third pin shafts, the other end of each clamping jaw is provided with a waist-shaped groove hole, and the third pin shafts are movably inserted into the waist-shaped groove holes.
Furthermore, three groups of mounting holes are fixedly arranged on the outer end face of the floating disc, and three second pin shafts are correspondingly and respectively in threaded connection with one mounting hole in each group of mounting holes.
Further, the inner diameter of the floating disc is larger than the outer diameter of the pressing ring.
Furthermore, at least one connecting notch is formed in the edge of the rear sealing cover.
Furthermore, an oil cup is arranged on the outer side surface of the chuck shell.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the chuck assembly is arranged on the center of the existing grinding machine, so that the automation level of a grinding machine clamp is improved on the premise of ensuring the machining precision and stability, the existing machine tool is not required to be mechanically transformed, the automatic clamping and loosening of a grinding machine workpiece are realized, the automatic feeding and discharging transformation of the grinding machine can be completed by matching with a feeding and discharging system of a machine tool robot, the requirement of the machine tool robot on automatic feeding and discharging is met, and the application and popularization of the automatic feeding and discharging system of the grinding machine robot are greatly promoted.
2. According to the invention, through the optimization of the line type of the clamping jaw, the logarithmic curve is creatively used on the curved surface line type of the clamping jaw, so that the clamping range of the clamping jaw can be effectively expanded, the convenience of changing production in automatic processing and the stability of clamping by the clamp are improved, and meanwhile, the grinding processing precision and the qualified rate are also improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective sectional view of the present invention;
FIG. 3 is a schematic front view of the present invention;
FIG. 4 is a schematic illustration of an explosive structure according to the present invention;
FIG. 5 is a schematic perspective view of the bearing housing;
FIG. 6 is a schematic perspective view of the intermediate ring;
FIG. 7 is a perspective view of the chuck housing;
FIG. 8 is a schematic perspective view of the rear cover;
FIG. 9 is a schematic perspective view of the chuck;
FIG. 10 is a schematic perspective view of the floating disk;
fig. 11 is a schematic perspective view of the jaw.
Wherein: the grinding machine spindle dead center, the bearing sleeve 2, the positioning flange 201, the one-way bearing 3, the middle ring 4, the floating plug hole 401, the roller bearing 5, the chuck shell 6, the tension spring 7, the rear sealing cover 8, the connecting notch 801, the chuck 9, the third pin shaft 901, the inner protrusion 902, the floating disc 10, the mounting hole 101, the second pin shaft 102, the outer protrusion 103, the clamping jaw 11, the waist-shaped slotted hole 111, the pressing ring 12 and the locking screw 13.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1 to 11, a self-compensating floating three-jaw power workpiece clamping device for a cylindrical grinding machine comprises a grinding machine spindle dead center 1. The grinding machine spindle dead center 1 is the existing structure of the existing cylindrical grinding machine equipment, and does not need to be changed to the existing machine tool headstock. The other parts form a chuck assembly, the chuck assembly is provided with a central through hole, the center through hole is sleeved on the top of the grinding machine, a fixing bolt is arranged on the through hole, the chuck assembly is fixed on the top, and meanwhile, the axial relative position of a chuck clamping jaw and the top can be conveniently adjusted. The chuck is placed on the top of a machine tool by self weight, and the headstock deflector rod only provides rotary power, so that the overload operation of a headstock bearing is avoided.
The outer side of the grinding machine spindle dead center 1 is sleeved with a bearing sleeve 2. In the embodiment, a flat surface is milled on the outer circular surface of the tail end of the grinding machine spindle dead center 1, the bearing sleeve 2 is sleeved on the outer side of the grinding machine spindle dead center 1, the cross section of an inner hole of the bearing sleeve 2 is matched with the cross section of the tail end of the grinding machine spindle dead center 1, and the size of the inner hole of the bearing sleeve 2 can be correspondingly adjusted according to the size of the dead center, so that after the bearing sleeve 2 is inserted and sleeved on the grinding machine spindle dead center 1, the circumferential positioning on the dead center is automatically completed.
A locking screw 13 is arranged in the side wall of the bearing sleeve 2, and the end part of the locking screw 13 penetrates through the bearing sleeve 2 and is tightly propped against the side surface of the grinding machine spindle dead center 1, so that the bearing sleeve 2 is fastened on the grinding machine spindle dead center 1; meanwhile, the axial relative position of the bearing sleeve 2 and the dead center 1 of the grinding machine spindle, namely the axial relative position of the chuck assembly and the dead center 1 of the grinding machine spindle, can be conveniently adjusted by loosening and screwing the locking screw 13.
The one-way bearing 3 is sleeved on the outer side of the bearing sleeve 2 in a rolling mode, the one-way bearing 3 is of an NCKfcb30 type, precision and reliability are good, and service life is long. The outer side of the one-way bearing 3 is fixedly sleeved with an intermediate ring 4, and the intermediate ring 4 rotates around the bearing sleeve 2 and the grinding machine spindle dead center 1 when the chuck assembly rotates forwards; when the chuck assembly rotates reversely, the intermediate ring 4 is fixed and kept synchronous with the bearing sleeve 2 and the grinding machine spindle dead center 1 due to the action of the one-way bearing 3.
The roller bearing 5 is rotatably sleeved on the outer side of the intermediate ring 4, and the chuck shell 6 is rotatably sleeved on the outer side of the roller bearing 5, so that the chuck shell 6 can relatively rotate around the intermediate ring 4. A tension spring 7 is fixedly connected between the inner wall of the chuck shell 6 and the outer wall of the middle ring 4. Under the forward rotation and natural state of the chuck assembly, the tension spring 7 is in a pre-tightening state, the intermediate ring 4 and the chuck shell 6 are kept at a fixed angle, and the chuck assembly is in a clamping state at the moment. When the chuck assembly rotates reversely, the chuck shell 6 rotates reversely, the middle ring 4 is fixed (under the action of the one-way bearing 3), the tension spring 7 is stretched for a certain length, meanwhile, the relative angle between the chuck shell 4 and the middle ring 4 is increased, and at the moment, the chuck assembly is in an opening state and is used for feeding or discharging a workpiece to be processed.
A rear sealing cover 8 connected with a grinding machine headstock driving lever in a transmission mode is arranged on one end face of the chuck shell 6, a connecting notch 801 is formed in the edge of the rear sealing cover 8, and accordingly insertion of the headstock driving lever of the cylindrical grinding machine is facilitated, rotation of the chuck assembly is driven, and clamping or opening operation is completed. The outer circumferential surface of the bearing housing 2 is provided with a positioning flange 201 between the chuck housing 6 and the rear cover 8 for axial positioning of the chuck housing 6 and the rear cover 8, so that the chuck housing 6 and the rear cover 8 can be axially kept unchanged relative to the bearing housing 2.
The other end face of the chuck shell 6 is fixedly connected with an annular chuck 9 through a bolt, a floating disc 10 is arranged on the inner side of the chuck 9, three clamping jaws 11 which are uniformly distributed are rotatably connected to the outer end face of the floating disc 10, and the other end of each clamping jaw 11 is movably connected to the outer end face of the chuck 9. Specifically, three second pin shafts 102 which are uniformly distributed circumferentially are fixedly arranged on the outer end face of the floating disc 10, and one end of the clamping jaw 11 is rotatably connected to the outer side of each second pin shaft 102; three third pin shafts 901 which are evenly and circumferentially distributed are fixedly arranged on the outer end face of the chuck 9, the other ends of the clamping jaws 11 are provided with kidney-shaped slotted holes 111, and the third pin shafts 901 are movably inserted into the kidney-shaped slotted holes 111. Wherein, the inner wall of the chuck 9 is provided with three inner protrusions 902 which are uniformly distributed, the outer circular surface of the floating disc 10 is provided with three outer protrusions 103 which are uniformly distributed, and the inner protrusions 902 and the outer protrusions 103 are distributed in a staggered manner, so that the relative rotation angle of the chuck 9 and the floating disc 10 is not more than 120 degrees, and the clamping jaw 11 is prevented from being locked at a limit point.
The side surfaces of the three claws 11 close to each other are arc convex surfaces in a logarithmic curve shape. Under the natural state, under the action of the tension spring 7, the three clamping jaws 11 on the chuck 9 are contracted to the position with the smallest diameter, after a workpiece to be ground is placed in the middle of the three clamping jaws 11, under the action of the spring force of the tension spring 7, the arc surfaces of the three clamping jaws 11 contact the surface of the workpiece and clamp the workpiece, and the workpiece is guaranteed not to rotate along the direction of cutting force in the chuck assembly. This chuck subassembly is at the lathe high-speed rotatory in-process, and jack catch 11 receives the centrifugal force effect and has the trend of outwards opening, and the pretightning force of extension spring 7 need overcome centrifugal force and can guarantee that jack catch 11 pushes down on the work piece surface under the effect of spring force all the time, and in friction angle auto-lock within range, the chuck subassembly can reliably press from both sides tight work piece all the time. When the workpiece is manually clamped for testing, after the workpiece is clamped by the clamp, the workpiece can be manually pushed to easily and freely move in a floating range.
A logarithmic curve is creatively applied to the curve line type of the clamping jaw 11, and proper logarithmic curve parameters are selected by calculation according to the mathematical definition and the physical characteristics of the logarithmic curve under the condition of meeting the self-locking condition of the cam inclined , the lead angle in a proper range is optimized, the clamping stroke is less limited, and the self-locking performance is good. Compared with a circular eccentric cam line type of a chicken heart chuck, the circular eccentric cam line type of the chicken heart chuck has larger clamping force and chuck stroke, and has better self-locking performance in a full stroke section.
Preferably, three sets of mounting holes 101 are fixedly arranged on the outer end surface of the floating disc 10, each set includes 5 threaded holes with different positions, and three second pins 102 are respectively and correspondingly threaded in one mounting hole 101 of each set of mounting holes 101. The clamping diameter range of the chuck assembly can be integrally changed by changing the diameter of the threaded hole distribution circle of the clamping jaw 11 on the floating disc 10 and the diameter of the screw distribution circle on the clamping jaw 11, so that the chuck assembly is suitable for grinding shaft parts with different specifications and sizes.
Three first pin shafts (not shown in the figure) are uniformly arranged on the end face of the floating disc 10 close to the middle ring 4, floating plug-in holes 401 corresponding to the first pin shafts are formed in the end face of the middle ring 4, and the axial and circumferential positioning of the floating disc 10 on the end face of the middle ring 4 is realized through the matching of the first pin shafts and the floating plug-in holes 401. A pressing ring 12 is movably sleeved on the outer side of the bearing sleeve 2, the inner side end of the pressing ring 12 is in threaded connection with the inner wall of the intermediate ring 4, and the inner wall of the pressing ring 12 is movably attached to the outer end faces of the one-way bearing 3 and the floating disc 10 respectively; meanwhile, the length of the end part of the bearing sleeve 2, which is positioned outside the one-way bearing 3, is greater than the axial length of the pressing ring 12, so that the intermediate ring 4 and the pressing ring 12 can freely move within a certain distance range along the axial direction, and then the power for axial movement of each clamping jaw 11 is provided through the floating disc 10.
The floating of the lathe floating disc 10 is combined, a floating pressure ring mechanism is axially adopted, the floating disc 10 is axially positioned and fixed by a pressure ring 12, an inner hole of the radial floating disc 10 is larger than the outer diameter of the pressure ring by 3mm, and the floating disc 10 can freely move around the axial direction within the range of 1.5 mm. Three first pin shafts on the radial floating disc 10 are placed in three floating plug-in holes 401 on the end face of the middle ring 4, and the inner diameter of each floating plug-in hole 401 is larger than the outer diameter of each first pin shaft, so that a floating gap of 1.5mm is formed between each first pin shaft and one side of each floating plug-in hole 401.
An oil cup is arranged on the outer side surface of the chuck shell 6, and lubricating oil can be injected into the chuck assembly through the oil cup so as to realize the maintenance of the equipment.
The chuck assembly is fixed on a dead center of a main shaft of a machine tool grinding machine and rotates along with a driving lever of a machine tool headstock, so that the overall weight and the size of the chuck assembly are required to be as light as possible. Therefore, in this embodiment, the chuck housing 6 and the rear cover 8 are made of aluminum alloy, and the end face rings such as the intermediate ring 4, the bearing sleeve 2, and the floating disc 10 are made of steel materials because they participate in the clamping action of the jaws 11 or serve as inner rings of the bearing. The total quality of the system is controlled within 1.7kg, the external dimension is controlled within 100mm, and the length is controlled within 75 mm.
In the chuck assembly, except the oil cup and the gap of the back sealing cover 8 matched with the mounting position of the deflector rod, the rest are all in an axisymmetric structure, and the unbalanced weight of the oil cup and the gap occupies a very small ratio in the whole structure, so that the whole balance of the chuck assembly in the rotating process is hardly influenced. Meanwhile, the lighter the mass of the floating disc 10 and the clamping jaws 11 is, the less radial disturbance to the workpiece is when the workpiece is rotated.
In the invention, a chuck shell 6, a chuck 9 and a rear sealing cover 8 rotate forwards/backwards along with a headstock deflector rod, the chuck shell 6 is elastically connected with an intermediate ring 4 through a tension spring 7, and the chuck shell 7 always keeps clockwise tension on the intermediate ring 4; the front end of the middle ring 4 is provided with a floating disc 10 in a floating positioning way through a floating pressure ring 12, the clamping jaws 11 are arranged on the floating disc 10 through bolts, and the tail parts of the clamping jaws 11 are provided with kidney-shaped slotted holes 111 and movably sleeved on a third pin shaft 901 of the chuck 9. Meanwhile, under the action of the floating disc 10, the workpiece can float in a certain range in the radial direction. After the workpiece is jacked up by the double tops of the grinding machine, the workpiece is centered, the chuck assembly floats in a self-compensating mode, only rotation power is provided, radial force is not applied to the workpiece, and the grinding precision of the workpiece is guaranteed. The chuck 9 and the intermediate ring 4 rotate together with a machine tool headstock during processing, the headstock rotates reversely when a workpiece is loaded and unloaded, the intermediate ring 4 does not rotate under the action of the one-way bearing 3, the chuck 9 rotates together with the headstock deflector rod, the chuck 9 and the intermediate ring 4 rotate oppositely, so that the three clamping jaws 11 are turned over and opened simultaneously, and the workpiece can be freely assembled and disassembled.
The self-compensating floating three-jaw power workpiece clamping device for the cylindrical grinding machine provided by the invention has the advantage that the grinding size precision is stably kept within 0.002-0.003 mm in the actual production process. The minimum service life of the maintenance-free device is 90 days (24 hours of work, the beat of a workpiece is about 20s), the continuous work is about 35 thousands of workpieces, and the performance is good.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011620587.8A CN113798935A (en) | 2020-12-31 | 2020-12-31 | Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011620587.8A CN113798935A (en) | 2020-12-31 | 2020-12-31 | Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine |
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| CN113798935A true CN113798935A (en) | 2021-12-17 |
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| CN202011620587.8A Withdrawn CN113798935A (en) | 2020-12-31 | 2020-12-31 | Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194567A (en) * | 2022-07-11 | 2022-10-18 | 北平机床(浙江)股份有限公司 | Round bar clamping driving mechanism |
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| CN107052916A (en) * | 2017-06-01 | 2017-08-18 | 玉环捷众机床有限公司 | A kind of grinding machine self-centering self-lock chuck |
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| CN214817157U (en) * | 2020-12-31 | 2021-11-23 | 合肥华兴机器人有限公司 | Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine |
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2020
- 2020-12-31 CN CN202011620587.8A patent/CN113798935A/en not_active Withdrawn
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|---|---|---|---|---|
| US4981057A (en) * | 1988-10-31 | 1991-01-01 | Krupp Widia Gmbh | Clamping device for connecting a tool head to a tool holder of a machine tool |
| EP0528155A2 (en) * | 1991-08-19 | 1993-02-24 | Forkardt Spannzeug Ag | Chuck for machine tools |
| CN204504272U (en) * | 2015-04-08 | 2015-07-29 | 兰州工业学院 | Centrifugal Automatic-clamping scroll chuck |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115194567A (en) * | 2022-07-11 | 2022-10-18 | 北平机床(浙江)股份有限公司 | Round bar clamping driving mechanism |
| CN115194567B (en) * | 2022-07-11 | 2024-04-16 | 北平机床(浙江)股份有限公司 | Round bar clamping driving mechanism |
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Application publication date: 20211217 |