CN216359509U

CN216359509U - Grinding machine hydraulic floating chuck headstock

Info

Publication number: CN216359509U
Application number: CN202123146443.6U
Authority: CN
Inventors: 蒋新民; 彭克立; 吕国庆; 李胜; 黄绍强
Original assignee: Hunan University Hicam Hunan Engineering Technology Research Co ltd
Current assignee: Hunan University Hicam Hunan Engineering Technology Research Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-22
Anticipated expiration: 2031-12-14

Abstract

The utility model belongs to the technical field of numerical control machines and discloses a grinder hydraulic floating chuck headstock which comprises a headstock body, wherein a rotating spindle part is fixedly arranged in the headstock body, a locking bolt is arranged at the bottom end of the headstock body, a torque motor assembly is fixedly arranged at the right end of the headstock body, and a floating chuck is fixedly arranged at the left end of the rotating spindle part. The torque motor rotor is fixedly connected with the main shaft body and the floating chuck, the grating drum body is fixedly connected with the torque motor rotor through the motor flange and the grating drum adjusting ring, the torque motor assembly directly controls the floating chuck to rotate, excessive elasticity of a coupler does not exist in transmission, and meanwhile, the encoder reading head is matched to accurately detect the rotation of the floating chuck in real time and transmit the rotation to the controller, so that the controller can accurately control the rotating speed and the angle of the headstock box body and accurately grind a special-shaped profile workpiece.

Description

Grinding machine hydraulic floating chuck headstock

Technical Field

The utility model belongs to the technical field of numerical control machines, and particularly relates to a grinding machine hydraulic floating chuck headstock.

Background

The chuck headstock is an assembly which is arranged on a numerical control machine tool and used for clamping a workpiece, is one of important assemblies on the numerical control machine tool, is mainly applied to precision grinding processing of cam shafts and special-shaped shaft parts, such as engine camshafts, oil pump camshafts and the like, and in the precision grinding process of the cam shaft parts and the special-shaped shaft parts, the rotation precision and rigidity of the headstock, the rotation positioning precision and the response speed of the headstock are one of important factors influencing the grinding precision, the special-shaped contour dimension precision and the surface quality of the headstock.

The traditional grinding machine head frame is driven by a servo motor, a structure that a coupler is connected with a rotating main shaft is adopted, an encoder is integrated in the servo motor, and in the precise grinding process, due to the fact that transition is needed through the coupler, the actual rotation positioning precision has the conditions of errors and response speed lag, and the requirement of special-shaped profile precise grinding cannot be completely met; in addition, most of the traditional grinding machine head frames adopt a common servo motor as a driving component, but the common servo motor has weak low-speed torque, and if the servo motor with low speed and large torque is selected, the production cost is increased; on the other hand, as shown in fig. 8, when the conventional grinding machine headstock is used, if the clamping surface of the workpiece is a blank surface or a rough surface, the workpiece end surface center hole and the workpiece clamping surface are not concentric, and most of the conventional grinding machine headstock uses a rigid chuck and a rigid claw to clamp the workpiece, so that the clamping jaws clamp the workpiece eccentrically and damage the workpiece, and the machining precision of grinding the special-shaped shaft parts is seriously affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic floating chuck head frame of a grinding machine, which solves the problems in the background technology.

In order to achieve the above purpose, the utility model provides the following technical scheme: a hydraulic floating chuck headstock of a grinding machine comprises a headstock box body, wherein a rotating main shaft part is fixedly installed inside the headstock box body, a locking bolt is arranged at the bottom end of the headstock box body, a torque motor assembly is fixedly installed at the right end of the headstock box body, a floating chuck is fixedly installed at the left end of the rotating main shaft part, a tip is fixedly installed in the middle of the floating chuck, a floating clamping jaw is fixedly installed at the left end of the floating chuck, a positioning pin and a positioning block are fixedly installed in the middle of the floating chuck, a rotary oil cylinder is fixedly installed at the right end of the torque motor assembly, a chuck pull rod is arranged in the middle of the rotating main shaft part, and a position signal switch is fixedly installed at the right end of the rotary oil cylinder;

the control terminal controls hydraulic oil on the numerical control machine tool to enter through an oil outlet on the rotary oil cylinder, so that a piston of the rotary oil cylinder is driven to move rightwards, the piston in the rotary oil cylinder is fixedly connected with the chuck pull rod, so that the chuck pull rod can be driven to move rightwards, the floating clamping jaw is fixedly arranged on a ball head movably connected on the floating chuck, when the chuck pull rod moves rightwards, the push-pull flange can be driven to move rightwards, a bulge which is contacted with the ball head through the push-pull flange moves rightwards when the push-pull flange moves rightwards, one end of the ball head, far away from the floating clamping jaw, rotates to one side far away from the axis, so that one side of the ball head, far away from the floating clamping jaw, rotates to the axis, so that a workpiece is clamped, when the workpiece is clamped, the piston on the chuck pull rod and the rotary oil cylinder does not move continuously, meanwhile, the piston moves to the rear end of the position signal switch detects that the piston reaches a stopping point, thereby transmitting a signal of clamping completion to the control terminal, feeding the signal back to the controller on the numerical control machine tool after the control terminal receives the signal, leading the controller to enter the next working procedure action, the workpiece is ground, so that automatic control is realized, when the workpiece is loosened after being ground, the control terminal outputs a command to the controller to enable hydraulic oil to enter through an oil outlet II on the rotary oil cylinder, the piston of the rotary oil cylinder is controlled to move reversely, so that the chuck pull rod moves leftwards, one end, close to the axis, of the floating clamping jaw mounted on the floating ball head is driven to move towards one side far away from the axis, the floating clamping jaw releases a workpiece, the piston moves to another stopping point arranged on the position signal switch at the moment, the position signal switch obtains a release signal, the signal is fed back to the controller, and the controller sends a command for entering the next process;

the moment motor rotor is fixedly connected with the main shaft body and the floating chuck, the grating drum body is fixedly connected with the moment motor rotor through the motor flange and the grating drum adjusting ring, the moment motor assembly directly controls the floating chuck to rotate, no power loss can be caused when the moment motor assembly transmits power to the floating chuck, so that the floating chuck can keep the original characteristics of low speed, high torque, good rotation rigidity and high response speed of the moment motor assembly, a servo motor with low speed and high torque is not required to be selected as a driving part, the production cost of the product is reduced, excessive elasticity of a coupler does not exist in transmission, meanwhile, a reading head of an encoder is matched to accurately detect the rotation of the floating chuck in real time and transmit the rotation to a controller, and the controller can accurately control the rotation speed and the angle of a headstock box and accurately grind the profile of a special-shaped profile workpiece, because the floating chuck and the floating clamping jaws are adopted in the product, the center and the center hole of the workpiece are used for unique centering, the excircle of the workpiece can be compensated and flexibly clamped, the workpiece cannot be clamped or damaged, the precision grinding processing of the special-shaped shaft workpiece is ensured, the clamping force on the workpiece can be adjusted, and the special-shaped shaft workpiece processing device is suitable for processing different workpieces.

Preferably, the rotating spindle part comprises a spindle sleeve, the spindle sleeve is fixedly installed in an inner cavity of the headstock box body, a bearing gland is fixedly installed at the left end of the spindle sleeve, the inner cavity of the spindle sleeve is movably connected with a spindle body, a front angle contact bearing and a rear angle contact bearing are respectively and fixedly installed at the left section and the right section of the spindle body, a spacer bush I and a precision lock nut I are fixedly installed inside the front angle contact bearing, a spacer bush II and a precision lock nut II are fixedly installed inside the rear angle contact bearing, an O-shaped sealing ring I is arranged at the left end of the spindle sleeve, a spindle rear cover is fixedly installed at the right end of the spindle sleeve, an O-shaped sealing ring II is attached to the left end of the spindle rear cover, a chuck mounting flange is fixedly installed at the left end of the spindle body, and a main sealing ring is sleeved at the left end of the spindle body, the right end of the main shaft body is sleeved with a framework oil seal, the right end of the main shaft rear cover is fixedly provided with an oil seal cover plate, and the left end of the main shaft sleeve is fixedly provided with an air seal cover;

sleeving the spacer bush at the right ends of the three front angle contact bearings, then locking the spacer bush I with the main shaft body by rotating the precise locking nut I, sleeving the spacer bush at the left ends of the two rear angle contact bearings in a similar manner, and then locking the two spacer bushes II by rotating the precise locking nut;

can realize the sealed of three anterior angle contact bearing and two relief angle contact bearings through setting up spacer sleeve one and spacer sleeve two to through using accurate lock nut one and accurate lock nut two to lock spacer sleeve one and spacer sleeve two, can realize convenient to detach and maintain anterior angle contact bearing and relief angle contact bearing's characteristics, very big degree reduction the maintenance cost.

Preferably, the front angle contact bearings are three in number, the three front angle contact bearings are in mutual contact, the two rear angle contact bearings are attached to each other, the three front angle contact bearings and the two rear angle contact bearings are all preloaded in a heavy load mode, the three front angle contact bearings are 25-degree contact angle precision bearings and adopt a triple configuration installation mode, the two rear angle contact bearings are 15-degree contact angle precision bearings and adopt a back-to-back installation mode, and the outer walls of the three front angle contact bearings are in contact with the installation seam allowance of the main shaft sleeve;

the outer wall of the front angle contact bearing is in contact with the mounting spigot of the main shaft sleeve, the front angle contact bearing can bear radial shearing force while realizing positioning, the three front angle contact bearings can bear radial load and two axial loads, and the front angle contact bearing and the rear angle contact bearing which can be provided by the mounting mode of the three front angle contact bearings and the two rear angle contact bearings have relatively high rigidity and can bear overturning moment.

Preferably, the bearing gland is pre-tightened at the left end of the contact bearing of the three front corners by interference, the bearing gland is positioned in the air sealing cover, and the left end of the bearing gland is fixedly connected with the chuck mounting flange;

the bearing gland pre-tightened by interference can integrally improve the rotation precision and the rotation rigidity of the main shaft.

Preferably, the main sealing ring and the O-shaped sealing ring II are sealed in a static sealing mode, the main shaft sleeve and the main shaft rear cover compress the O-shaped sealing ring II, the chuck mounting flange and the bearing gland compress the main sealing ring, the oil seal cover plate and the main shaft rear cover compress the framework oil seal, and the oil seal cover plate is sealed in a dynamic sealing mode;

through the mode that the main sealing ring II is compressed through the main shaft sleeve and the main shaft rear cover, the chuck mounting flange and the bearing gland compress the main sealing ring, and the skeleton oil seal is compressed through the oil seal cover plate and the main shaft rear cover, the firmness of sealing the O-shaped sealing ring II, the main sealing ring and the skeleton oil seal can be realized, and the leakage is avoided.

Preferably, an air ring gap is arranged between the air sealing cover and the mounting flange of the chuck, and the air ring gap adopts a labyrinth sealing structure;

the air ring clearance in the form of a labyrinth seal structure is adopted, so that a rigid air film is formed between the seal end faces of an air source, the effects of cooling, dust prevention, abrasion-proof liquid and the like are achieved, the front and the back are in a multi-layer seal structure, grinding liquid, grinding wheel particles and scrap iron are effectively prevented from entering the inside of the bearing, and the service life of the spindle is prolonged.

Preferably, the torque motor assembly comprises a motor box sleeve, the motor box sleeve is fixedly installed at the right end of the headstock box body, the left end of the motor box sleeve is connected with a torque motor stator and a connecting disc through bolts, the right end of the rotating spindle component is fixedly provided with a torque motor rotor, a motor flange and a grating drum adjusting ring, the right end of the grating drum adjusting ring is fixedly provided with a grating drum body, the right end of the connecting disc is fixedly provided with an encoder mounting plate and an encoder reading head, the inside of the motor box sleeve is fixedly provided with an oil cylinder mounting flange, the outer side of the oil cylinder mounting flange is sleeved with an oil seal assembly, the right side surface of the motor box sleeve is fixedly provided with a rear cover, the right end of the rear cover is fixedly provided with an oil seal pressing plate, and the rear end of the motor box sleeve is fixedly provided with a cooling liquid outlet pipe and a cooling liquid inlet pipe;

the device is electrified, the torque motor stator and the torque motor rotor are driven by electric power to enable the torque motor rotor to rotate, the motor flange is fixedly connected with the torque motor rotor so as to drive the motor flange to rotate, and the motor flange, the oil cylinder mounting flange, the tip, the main shaft body, the chuck mounting flange, the floating chuck, the positioning pin, the positioning block and the tip are fixedly connected, so that the oil cylinder mounting flange, the tip, the main shaft body, the chuck mounting flange, the floating chuck, the positioning pin, the positioning block and the tip can be driven to slowly rotate together when the motor flange rotates;

the motor flange drives the positioning pin and the positioning block to rotate slowly, so that the situation that the end parts of the positioning pin and the positioning block jump radially due to the fact that the rotating speed is too high can be effectively avoided, the effect that the power for driving the positioning pin and the positioning block can reduce the speed load to the minimum after the workpiece is aligned can be guaranteed, and the load of the torque motor assembly is reduced.

Preferably, the connecting disc is located on the right side of a torque motor stator, the grating drum adjusting ring is located on the right side of a motor flange, and the torque motor rotor is located inside the motor flange.

Preferably, the encoder reading head is positioned on the right side of the encoder mounting plate, the cooling liquid outlet pipe is positioned on the right side of the cooling liquid inlet pipe, and the axis of the connecting end of the cooling liquid outlet pipe and the cooling liquid inlet pipe is in a vertical state;

when the positioning pin, the positioning block and the center rotate, the reading head of the encoder can read the rotation angle and transmit the rotation angle to the control terminal, when the floating chuck drives the positioning pin to rotate to be aligned with the positioning hole on the workpiece, the tail frame mechanism on the numerical control machine moves towards the workpiece to tightly push the workpiece, so that one end of the workpiece, far away from the tail frame, is contacted with the center, the positioning pin is inserted into the positioning hole, the center of the workpiece is positioned, and the angle of the workpiece is determined;

after the control terminal receives the rotation information, the rotation angle of the rotary floating chuck is accurately controlled, so that the angle of the rotary floating chuck is accurately controlled and controlled when the rotary floating chuck is aligned with a workpiece, and accurate connection is guaranteed.

The utility model has the following beneficial effects:

1. the torque motor rotor is fixedly connected with the main shaft body and the floating chuck, the grating drum body is fixedly connected with the torque motor rotor through the motor flange and the grating drum adjusting ring, the torque motor assembly directly controls the floating chuck to rotate, excessive elasticity of a coupler does not exist in transmission, and meanwhile, the encoder reading head is matched to accurately detect the rotation of the floating chuck in real time and transmit the rotation to the controller, so that the controller can accurately control the rotating speed and the angle of the headstock box body and accurately grind a special-shaped profile workpiece.

2. The utility model adopts the mode that the torque motor assembly directly controls the floating chuck to rotate, and no power loss exists when the torque motor assembly transmits power to the floating chuck because the coupling does not have excess power, so that the floating chuck can keep the original characteristics of low speed, high torque, good rotation rigidity and high response speed of the torque motor assembly, and a servo motor with low speed and high torque is not required to be selected as a driving part, thereby reducing the production cost of the product.

3. The floating chuck and the floating chuck are adopted, so that the center and the workpiece center hole are used for unique centering, the outer circle of the workpiece can be compensated and flexibly clamped, the workpiece cannot be clamped eccentrically or damaged, the precision grinding machining of the special-shaped shaft workpiece is ensured, the clamping force on the workpiece can be adjusted, and the special-shaped shaft workpiece is suitable for machining different workpieces.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view in cross-section of the structure of the present invention;

FIG. 3 is a left side view of the structure of the present invention;

FIG. 4 is a schematic right-view of the structure of the present invention;

FIG. 5 is a schematic view of a torque motor assembly according to the present invention;

FIG. 6 is a schematic view of the connection of the rotating spindle unit of the present invention;

FIG. 7 is a left side view of the main shaft body of the present invention;

FIG. 8 is a schematic view of a workpiece held in the present invention configuration;

FIG. 9 is a schematic view of the grinding of the structural special-shaped shaft workpiece of the present invention;

fig. 10 is a schematic view of the floating clamping jaw of the structure of the utility model in a clamping and loosening state.

In the figure: 1. a headstock box body; 2. a rotating spindle unit; 201. a main shaft sleeve; 202. a bearing gland; 203. a main shaft body; 204. a front corner contact bearing; 205. a spacer bush I; 206. a first precise locking nut; 207. a relief angle contact bearing; 208. a second spacer sleeve; 209. a second precision locking nut; 210. a first O-shaped sealing ring; 211. an O-shaped sealing ring II; 212. mounting a flange on a chuck; 213. a primary seal ring; 214. a main shaft rear cover; 215. an oil seal cover plate; 216. framework oil seal; 217. an airtight cover; 3. a torque motor assembly; 301. a motor box sleeve; 302. a torque motor stator; 303. a connecting disc; 304. a torque motor rotor; 305. a motor flange; 306. a grating drum adjusting ring; 307. a grating drum body; 308. an encoder mounting plate; 309. an encoder read head; 310. installing a flange on the oil cylinder; 311. an oil seal assembly; 312. a rear cover; 313. an oil seal pressing plate; 314. a coolant outlet pipe; 315. a cooling liquid inlet pipe; 4. locking the bolt; 5. a float chuck; 6. a tip; 7. a floating jaw; 8. positioning pins; 9. positioning blocks; 10. a rotary oil cylinder; 11. a chuck pull rod; 12. a position signal switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 10, in the embodiment of the present invention, a grinding machine hydraulic floating chuck headstock includes a headstock box 1, a rotating spindle part 2 is fixedly installed inside the headstock box 1, a locking bolt 4 is arranged at a bottom end of the headstock box 1, a torque motor assembly 3 is fixedly installed at a right end of the headstock box 1, a floating chuck 5 is fixedly installed at a left end of the rotating spindle part 2, a tip 6 is fixedly installed at a middle of the floating chuck 5, a floating jaw 7 is fixedly installed at a left end of the floating chuck 5, a positioning pin 8 and a positioning block 9 are fixedly installed at a middle of the floating chuck 5, a rotary cylinder 10 is fixedly installed at a right end of the torque motor assembly 3, a chuck pull rod 11 is arranged at a middle of the rotating spindle part 2, and a position signal switch 12 is fixedly installed at a right end of the rotary cylinder 10;

the control terminal controls hydraulic oil on the numerical control machine tool to enter through an oil outlet on the rotary oil cylinder 10 so as to drive a piston of the rotary oil cylinder 10 to move rightwards, the piston in the rotary oil cylinder 10 is fixedly connected with the chuck pull rod 11 so as to drive the chuck pull rod 11 to move rightwards, as shown in figure 10, the floating clamping jaw 7 is fixedly arranged on a ball head movably connected on the floating chuck 5, a push-pull flange can be driven to move rightwards when the chuck pull rod 11 moves rightwards, a bulge which is contacted with the ball head through the push-pull flange moves rightwards when the push-pull flange moves rightwards, one end of the ball head far away from the floating clamping jaw 7 rotates to one side far away from the axis, so that one side of the ball head far away from the floating clamping jaw 7 rotates to the axis, so as to clamp a workpiece, and when the workpiece is clamped, the chuck pull rod 11 and the piston on the rotary oil cylinder 10 do not move continuously, meanwhile, the piston moves to the rear end of the position signal switch 12, the position signal switch 12 detects that the piston reaches a stopping point at the moment, so that a signal of clamping completion is transmitted to the control terminal, the control terminal feeds the signal back to the controller on the numerical control machine after receiving the signal, the controller enters the next procedure action to grind the workpiece, and automatic control is realized, when the workpiece is loosened after grinding, the control terminal outputs a command to the controller, so that hydraulic oil enters through an oil outlet II on the rotary oil cylinder 10, the piston of the rotary oil cylinder 10 is controlled to move reversely, the chuck pull rod 11 moves leftwards, one end, close to the axis, of the floating claw 7 mounted on the floating ball head is driven to move towards one side far away from the axis, the floating claw 7 loosens the workpiece, and the piston moves to another stopping point arranged on the position signal switch 12, the position signal switch 12 obtains a relaxation signal and feeds the signal back to the controller, so that the controller sends out a command for entering the next procedure;

through the fixed connection between the torque motor rotor 304 and the spindle body 203 and the floating chuck 5, the grating drum body 307 is fixedly connected with the torque motor rotor 304 through the motor flange 305 and the grating drum adjusting ring 306, the torque motor assembly 3 directly controls the floating chuck 5 to rotate, no power loss can be caused when the torque motor assembly 3 transmits power to the floating chuck 5, so that the floating chuck 5 can keep the original low-speed high-torque moment of the torque motor assembly 3, the rotation rigidity is good, the response speed is high, a servo motor with low speed and high torque is not required to be selected as a driving part, the production cost of the product is reduced, excessive elasticity of a coupler does not exist in transmission, meanwhile, the encoder reading head 309 is matched to carry out real-time and accurate detection on the rotation of the floating chuck 5 and transmit the detection to the controller, and therefore the controller can realize accurate control of the rotating speed and the angle of the headstock box 1 and carry out accurate imitation on special-shaped profile workpieces The special-shaped shaft workpiece precision grinding machine adopts the floating chuck 5 and the floating clamping claws 7, and only centers the workpiece through the center 6 and the workpiece center holes, so that the excircle of the workpiece can be compensated and flexibly clamped, the workpiece cannot be clamped or damaged, the precision grinding of the special-shaped shaft workpiece is ensured, the clamping force on the workpiece can be adjusted, and the special-shaped shaft workpiece precision grinding machine is suitable for processing different workpieces.

Wherein, the rotating spindle part 2 comprises a spindle sleeve 201, the spindle sleeve 201 is fixedly installed in an inner cavity of the headstock box 1, a bearing gland 202 is fixedly installed at the left end of the spindle sleeve 201, the inner cavity of the spindle sleeve 201 is movably connected with a spindle body 203, a front angle contact bearing 204 and a rear angle contact bearing 207 are respectively and fixedly installed at the left section and the right section of the spindle body 203, a spacer bush first 205 and a precision lock nut first 206 are fixedly installed inside the front angle contact bearing 204, a spacer bush second 208 and a precision lock nut second 209 are fixedly installed inside the rear angle contact bearing 207, an O-shaped sealing ring first 210 is arranged at the left end of the spindle sleeve 201, a spindle rear cover 214 is fixedly installed at the right end of the spindle sleeve 201, an O-shaped sealing ring second 211 is attached to the left end of the spindle rear cover 214, a chuck mounting flange 212 is fixedly installed at the left end of the spindle body 203, and a main sealing ring 213 is sleeved at the left end of the spindle body 203, a framework oil seal 216 is sleeved at the right end of the main shaft body 203, an oil seal cover plate 215 is fixedly installed at the right end of the main shaft rear cover 214, and an air seal cover 217 is fixedly installed at the left end of the main shaft sleeve 201;

sleeving a first spacer sleeve 205 at the right ends of three front corner contact bearings 204, then locking the first spacer sleeve 205 with the main shaft body 203 by rotating a first precision locking nut 206, sleeving a second spacer sleeve 208 at the left ends of two rear corner contact bearings 207 in the same way, and then locking the second spacer sleeve 208 by rotating a second precision locking nut 209;

the three front corner contact bearings 204 and the two rear corner contact bearings 207 can be sealed by arranging the first spacer sleeve 205 and the second spacer sleeve 208, and the first spacer sleeve 205 and the second spacer sleeve 208 are locked by using the first precise locking nut 206 and the second precise locking nut 209, so that the front corner contact bearings 204 and the rear corner contact bearings 207 can be conveniently detached and maintained, and the maintenance cost is greatly reduced.

The three front angle contact bearings 204 are in contact with each other, the two rear angle contact bearings 207 are attached to each other, the three front angle contact bearings 204 and the two rear angle contact bearings 207 are all preloaded by heavy load, the three front angle contact bearings 204 are 25-degree contact angle precision bearings and adopt a triple configuration installation mode, the two rear angle contact bearings 207 are 15-degree contact angle precision bearings and adopt a back-to-back installation mode, and the outer walls of the three front angle contact bearings 204 are in contact with the installation seam allowance of the main shaft sleeve 201;

the outer wall of the front angular contact bearing 204 is contacted with the mounting spigot of the main shaft sleeve 201, so that the front angular contact bearing 204 can bear radial shearing force while realizing positioning, the three front angular contact bearings 204 can bear radial load and two axial loads, and the three front angular contact bearings 204 and the two rear angular contact bearings 207 can be mounted in a way that the front angular contact bearing 204 and the rear angular contact bearing 207 have relatively high rigidity and can bear overturning moment.

The bearing gland 202 is pre-tightened at the left ends of the three front corner contact bearings 204 by interference, the bearing gland 202 is positioned in the air sealing cover 217, and the left end of the bearing gland 202 is fixedly connected with the chuck mounting flange 212;

the bearing gland 202 pre-tightened by interference can integrally improve the rotation precision and the rotation rigidity of the main shaft.

The main sealing ring 213 and the second O-shaped sealing ring 211 are both sealed in a static sealing mode, the second O-shaped sealing ring 211 is pressed tightly by the main shaft sleeve 201 and the main shaft rear cover 214, the main sealing ring 213 is pressed tightly by the chuck mounting flange 212 and the bearing gland 202, the framework oil seal 216 is pressed tightly by the oil seal cover plate 215 and the main shaft rear cover 214, and the oil seal cover plate 215 is sealed in a dynamic sealing mode;

through the mode that the main shaft sleeve 201 and the main shaft rear cover 214 compress the second O-shaped sealing ring 211, the chuck mounting flange 212 and the bearing gland 202 compress the main sealing ring 213 and the oil seal cover plate 215 and the main shaft rear cover 214 compress the framework oil seal 216, the sealing firmness of the second O-shaped sealing ring 211, the main sealing ring 213 and the framework oil seal 216 can be realized, and the leakage is avoided.

An air ring gap is arranged between the air sealing cover 217 and the chuck mounting flange 212, and the air ring gap adopts a labyrinth sealing structure;

Wherein, the torque motor assembly 3 comprises a motor box sleeve 301, the motor box sleeve 301 is fixedly installed at the right end of the headstock box 1, the left end of the motor box sleeve 301 is connected with a torque motor stator 302 and a connecting disc 303 through bolts, the right end of the rotating spindle part 2 is fixedly installed with a torque motor rotor 304, a motor flange 305 and a grating drum adjusting ring 306, the right end of the grating drum adjusting ring 306 is fixedly installed with a grating drum body 307, the right end of the connecting disc 303 is fixedly installed with an encoder installing plate 308 and an encoder reading head 309, the inside of the motor box sleeve 301 is fixedly installed with an oil cylinder installing flange 310, the outer side of the oil cylinder installing flange 310 is sleeved with an oil seal assembly 311, the right side surface of the motor box sleeve 301 is fixedly installed with a rear cover 312, the right end of the rear cover 312 is fixedly installed with an oil seal pressing plate 313, the rear end of the motor box sleeve 301 is fixedly installed with a cooling liquid outlet pipe 314 and a cooling liquid inlet pipe 315, wherein, the connecting disc 303 is positioned on the right side of the torque motor stator 302, the grating drum adjusting ring 306 is positioned on the right side of the motor flange 305, and the torque motor rotor 304 is positioned inside the motor flange 305;

the device is electrified, the torque motor stator 302 and the torque motor rotor 304 are driven by electric power to enable the torque motor rotor 304 to rotate, and the motor flange 305 and the torque motor rotor 304 are fixedly connected to drive the motor flange 305 to rotate, so that the motor flange 305, the oil cylinder mounting flange 310, the tip 6, the spindle body 203, the chuck mounting flange 212, the floating chuck 5, the positioning pin 8, the positioning block 9 and the tip 6 are fixedly connected, and therefore when the motor flange 305 rotates, the oil cylinder mounting flange 310, the tip 6, the spindle body 203, the chuck mounting flange 212, the floating chuck 5, the positioning pin 8, the positioning block 9 and the tip 6 can be driven to slowly rotate together;

drive locating pin 8 and locating piece 9 through motor flange 305 and rotate slowly, can effectually avoid because the slew velocity leads to the condition that radial runout appears in the tip of locating pin 8 and locating piece 9 too fast to can guarantee after aligning the work piece, the power of drive locating pin 8 and locating piece 9 can reach the effect of stable positioning with minimum speed reduction load, thereby reduced torque motor assembly 3's burden.

The encoder reading head 309 is positioned on the right side of the encoder mounting plate 308, the cooling liquid outlet pipe 314 is positioned on the right side of the cooling liquid inlet pipe 315, and the axis of the connecting end of the cooling liquid outlet pipe 314 and the cooling liquid inlet pipe 315 is in a vertical state;

when the positioning pin 8, the positioning block 9 and the center 6 rotate, the reading head 309 of the encoder can read the rotation angle and transmit the rotation angle to the control terminal, after the floating chuck 5 drives the positioning pin 8 to rotate to be aligned with the positioning hole on the workpiece, the tailstock mechanism on the numerical control machine moves towards the workpiece to tightly push the workpiece, so that one end of the workpiece, far away from the tailstock, is contacted with the center 6, the positioning pin 8 is inserted into the positioning hole, the center of the workpiece is positioned, and the angle of the workpiece is determined;

after the control terminal receives the rotation information, the rotation angle of the rotary floating chuck 5 is accurately controlled, so that the angle of the rotary floating chuck 5 is accurately controlled and controlled when the rotary floating chuck is aligned with a workpiece, and accurate connection is guaranteed.

The working principle and the using process are as follows:

when the device is used, the device is electrified, the torque motor stator 302 and the torque motor rotor 304 are driven by electric power, so that the torque motor rotor 304 rotates, the motor flange 305 and the torque motor rotor 304 are fixedly connected, the motor flange 305 is driven to rotate, the motor flange 305, the oil cylinder mounting flange 310, the tip 6, the spindle body 203, the chuck mounting flange 212, the floating chuck 5, the positioning pin 8, the positioning block 9 and the tip 6 are fixedly connected, and therefore the oil cylinder mounting flange 310, the tip 6, the spindle body 203, the chuck mounting flange 212, the floating chuck 5, the positioning pin 8, the positioning block 9 and the tip 6 can be driven to slowly rotate together when the motor flange 305 rotates;

when the positioning pin 8, the positioning block 9 and the center 6 rotate, the encoder reading head 309 can read the rotation angle and transmit the rotation angle to the control terminal, after the control terminal receives the rotation information, the rotation angle of the rotary floating chuck 5 is accurately controlled, when the floating chuck 5 drives the positioning pin 8 to rotate to be aligned with the positioning hole on the workpiece, a tailstock mechanism on the numerical control machine moves towards the workpiece to tightly push the workpiece, one end of the workpiece, far away from the tailstock, is in contact with the center 6, the positioning pin 8 is inserted into the positioning hole, the center of the workpiece is positioned, and the angle of the workpiece is determined;

then clamping the workpiece, the control terminal controls hydraulic oil on the numerical control machine tool to enter through an oil outlet on the rotary oil cylinder 10 so as to drive a piston of the rotary oil cylinder 10 to move rightwards, the piston in the rotary oil cylinder 10 is fixedly connected with a chuck pull rod 11 so as to drive the chuck pull rod 11 to move rightwards, the floating clamping jaw 7 is in transmission connection with a ball head arranged on the floating chuck 5 so as to drive one end, close to an axis, of the floating clamping jaw 7 to move towards the workpiece when the chuck pull rod 11 moves rightwards, so as to clamp the workpiece, when the workpiece is clamped, the chuck pull rod 11 and the piston on the rotary oil cylinder 10 do not move continuously, meanwhile, the piston moves to the rear end of the position signal switch 12, at the moment, the position signal switch 12 detects that the piston reaches a stopping point, so that a clamping finished signal is transmitted to the control terminal, and after the control terminal receives the signal, feeding back the signal to a controller on the numerical control machine tool, and enabling the controller to enter the next procedure for action to grind the workpiece, thereby realizing automatic control;

when the workpiece is loosened after grinding, the control terminal outputs a command to the controller, hydraulic oil enters through the oil outlet II on the rotary oil cylinder 10, so that the piston of the rotary oil cylinder 10 is controlled to move in the reverse direction, the chuck pull rod 11 moves leftwards, one end, close to the axis, of the floating clamping jaw 7 installed on the floating ball head is driven to move towards one side far away from the axis, the floating clamping jaw 7 loosens the workpiece, the piston moves to the other stopping point arranged on the position signal switch 12 at the moment, the position signal switch 12 obtains a loosening signal, the signal is fed back to the controller, and the controller sends a command for entering the next procedure.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Grinding machine hydraulic pressure floating chuck headstock, including headstock box (1), its characterized in that: a rotating spindle part (2) is fixedly arranged in the headstock box body (1), the bottom end of the headstock body (1) is provided with a locking bolt (4), the right end of the headstock body (1) is fixedly provided with a torque motor assembly (3), a floating chuck (5) is fixedly arranged at the left end of the rotating main shaft part (2), the middle part of the floating chuck (5) is fixedly provided with a tip (6), the left end of the floating chuck (5) is fixedly provided with a floating clamping jaw (7), the middle part of the floating chuck (5) is fixedly provided with a positioning pin (8) and a positioning block (9), a rotary oil cylinder (10) is fixedly arranged at the right end of the torque motor assembly (3), the middle part of the rotating spindle part (2) is provided with a chuck pull rod (11), and the right end of the rotary oil cylinder (10) is fixedly provided with a position signal switch (12).

2. The grinding machine hydraulic floating chuck head frame as claimed in claim 1, characterized in that: the rotary spindle component (2) comprises a spindle sleeve (201), the spindle sleeve (201) is fixedly installed in an inner cavity of a headstock box body (1), a bearing gland (202) is fixedly installed at the left end of the spindle sleeve (201), a spindle body (203) is movably connected to the inner cavity of the spindle sleeve (201), a front angle contact bearing (204) and a rear angle contact bearing (207) are respectively and fixedly installed at the left section and the right section of the spindle body (203), a spacer bush I (205) and a precise lock nut I (206) are fixedly installed inside the front angle contact bearing (204), a spacer bush II (208) and a precise lock nut II (209) are fixedly installed inside the rear angle contact bearing (207), an O-shaped sealing ring I (210) is arranged at the left end of the spindle sleeve (201), and a spindle rear cover (214) is fixedly installed at the right end of the spindle sleeve (201), the left end laminating of main shaft back cover (214) has O type sealing washer two (211), the left end fixed mounting of main shaft body (203) has chuck mounting flange (212), the left end cover of main shaft body (203) has main sealing washer (213), skeleton oil blanket (216) have been cup jointed to the right-hand member of main shaft body (203), the right-hand member fixed mounting of main shaft back cover (214) has oil blanket apron (215), the left end fixed mounting of main shaft sleeve (201) has gas seal lid (217).

3. The grinding machine hydraulic floating chuck head frame as claimed in claim 2, characterized in that: front angle contact bearing (204) is three altogether, and is three contact each other between front angle contact bearing (204), back angle contact bearing (207) is two totally, two laminate each other between back angle contact bearing (207), and is three front angle contact bearing (204) and two back angle contact bearing (207) all adopt heavily loaded pretension, and are three front angle contact bearing (204) is 25 contact angle precision bearing and adopts the mounting means of trigeminy configuration, two back angle contact bearing (207) is 15 contact angle precision bearing and adopts the mounting means back to back, and is three the outer wall of front angle contact bearing (204) contacts with the installation tang of spindle sleeve (201).

4. The grinding machine hydraulic floating chuck head frame as claimed in claim 2, characterized in that: the bearing gland (202) is pre-tightened at the left end of the three front corner contact bearings (204) in an interference manner, the bearing gland (202) is located inside the air sealing cover (217), and the left end of the bearing gland (202) is fixedly connected with the chuck mounting flange (212).

5. The grinding machine hydraulic floating chuck head frame as claimed in claim 2, characterized in that: main sealing washer (213) and O type sealing washer two (211) all adopt the form of static seal to seal, main shaft sleeve (201) and main shaft back lid (214) compress tightly O type sealing washer two (211), chuck mounting flange (212) compress tightly main sealing washer (213) with bearing cover (202), oil blanket apron (215) and main shaft back lid (214) compress tightly skeleton oil blanket (216), oil blanket apron (215) adopt the form of dynamic seal to seal.

6. The grinding machine hydraulic floating chuck head frame as claimed in claim 2, characterized in that: an air ring gap is arranged between the air sealing cover (217) and the chuck mounting flange (212), and a labyrinth sealing structure is adopted in the air ring gap.

7. The grinding machine hydraulic floating chuck head frame as claimed in claim 1, characterized in that: the torque motor assembly (3) comprises a motor box sleeve (301), the motor box sleeve (301) is fixedly installed at the right end of the headstock box body (1), the left end of the motor box sleeve (301) is connected with a torque motor stator (302) and a connecting disc (303) through bolts, the right end of the rotating spindle component (2) is fixedly installed with a torque motor rotor (304), a motor flange (305) and a grating drum adjusting ring (306), the right end of the grating drum adjusting ring (306) is fixedly installed with a grating drum body (307), the right end of the connecting disc (303) is fixedly installed with an encoder installing plate (308) and an encoder reading head (309), the inside of the motor box sleeve (301) is fixedly installed with an oil cylinder installing flange (310), the outside of the oil cylinder installing flange (310) is sleeved with an oil seal assembly (311), the right side face of the motor box sleeve (301) is fixedly installed with a rear cover (312), the right end of back lid (312) is fixed mounting has oil blanket clamp plate (313), the rear end fixed mounting of motor case cover (301) has coolant liquid exit tube (314) and coolant liquid to advance pipe (315).

8. The grinding machine hydraulic floating chuck head frame as claimed in claim 7, characterized in that: the connecting disc (303) is located on the right side of a torque motor stator (302), the grating drum adjusting ring (306) is located on the right side of a motor flange (305), and the torque motor rotor (304) is located inside the motor flange (305).

9. The grinding machine hydraulic floating chuck head frame as claimed in claim 7, characterized in that: the encoder reading head (309) is located on the right side of the encoder mounting plate (308), the cooling liquid outlet pipe (314) is located on the right side of the cooling liquid inlet pipe (315), and the axis of the connecting end of the cooling liquid outlet pipe (314) and the cooling liquid inlet pipe (315) is in a vertical state.