CN113618558A

CN113618558A - High-precision high-speed follow-up camshaft grinding machine

Info

Publication number: CN113618558A
Application number: CN202110938651.5A
Authority: CN
Inventors: 徐刚强; 周康康; 曹毅; 胡火明; 阚李近; 蒋文龙; 李孝禄; 张新娜; 汤荣; 倪明亮; 王前进; 叶李斌; 王而聪
Original assignee: Zhejiang Boxing Industry And Trade Co ltd
Current assignee: Zhejiang Boxing Industry And Trade Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-11-09

Abstract

The invention relates to the technical field of camshaft machining equipment, and discloses a high-precision high-speed follow-up camshaft grinding machine which comprises a clamping mechanism and a grinding feeding mechanism, wherein the clamping mechanism comprises a headstock and a tailstock, and the headstock is connected with a clamp; the tailstock comprises a tailstock base, a second servo motor is arranged on the tailstock base, an output shaft of the second servo motor penetrates through a first lead screw fixedly connected with a first through hole, the first lead screw is in threaded connection with a connecting plate, the connecting plate is further connected with a push rod, a sleeve is arranged in the second through hole, the grinding feeding mechanism comprises a base, a headstock base and the tailstock base are both installed on the base, two first slide rails parallel to each other are fixedly connected to the base, a first sliding table is arranged on the first slide rails in a sliding mode, and the first sliding table is close to a first lower nut fixing seat fixedly connected with one side of the base. The invention solves the problems that the camshaft grinding machine in the prior art can not stably clamp and flexibly process the camshaft and the position precision is insufficient when the position of the grinding wheel is adjusted.

Description

High-precision high-speed follow-up camshaft grinding machine

Technical Field

The invention relates to the technical field of camshaft machining equipment, in particular to a high-precision high-speed follow-up camshaft grinding machine.

Background

The camshaft is widely applied to engines such as gasoline engines or diesel engines and the like and is used for controlling the opening and closing of the valve in a gas distribution system, and the working performance of the engine is directly determined by the quality of the processing quality of the camshaft.

The camshaft is generally cast by a die, the surface of the cast camshaft is generally rough, but the camshaft runs at a high speed in an engine, so the roughness requirement is very high, the grinding finish machining of the camshaft is usually carried out by a numerical control camshaft grinding machine at present, the camshaft is placed in a clamping mechanism of the grinding machine during grinding, a workpiece is driven to rotate by the clamping mechanism, and the camshaft meeting the requirement is machined by linkage of the feeding motion of a grinding feeding mechanism and the high-speed rotation of a grinding wheel and the rotating motion of the workpiece.

However, the existing camshaft grinding machine has the following problems: 1. the clamping stability of a headstock of a clamping mechanism of a camshaft grinding machine on a camshaft is poor, the camshaft is easy to move in a string mode during grinding, a tailstock of the clamping mechanism cannot sense the clamping force of the camshaft and the accurate clamping position of the camshaft, and during camshaft grinding, the clamping force of the camshaft cannot be stably adjusted and safely protected, so that the camshaft cannot be flexibly processed; 2. the prior grinding feed mechanism has the problem of insufficient position precision when the position of a grinding wheel is adjusted.

Due to the technical problems, the linear velocity of the grinding wheel of the existing domestic camshaft grinding machine in China can only be below 100m/s generally, and the grinding precision and the grinding speed of the camshaft grinding machine are directly influenced; however, with the advance of science and technology, especially with the development of high-end automobile engines, unmanned aerial vehicle engines, military tank engines and other equipment, the precision requirement of the high-end equipment on high-performance negative-curvature camshaft products becomes higher and higher, and the existing camshaft grinding machine with the grinding wheel linear velocity lower than 100m/s cannot meet higher requirements, so that the technical problem existing in the prior art is solved, and the high-precision high-speed follow-up camshaft grinding machine with the efficient grinding wheel linear velocity of 120m/s or above is very necessary.

Disclosure of Invention

In view of the above, the present invention provides a high-precision high-speed follow-up camshaft grinding machine, which solves the problems that the camshaft grinding machine in the prior art cannot stably clamp and flexibly process the camshaft, and the position precision is insufficient when the position of the grinding wheel is adjusted.

The invention solves the technical problems by the following technical means:

a high-precision high-speed follow-up camshaft grinding machine comprises a clamping mechanism and a grinding feeding mechanism, wherein the clamping mechanism comprises a headstock and a tailstock, and a clamp is fixedly connected to the headstock; the tailstock comprises a tailstock seat, a first through hole and a second through hole are formed in the tailstock seat, a second servo motor is fixedly connected to the first through hole, an output shaft of the second servo motor penetrates through the first through hole and is fixedly connected with a first lead screw, the lead screw is connected with a first lead screw nut, the first lead screw nut is connected with a connecting plate, a push rod is further fixedly connected to the connecting plate, and a sleeve is arranged in the second through hole in a sliding mode; one end of the sleeve is fixedly connected with a tailstock center, a stepped hole is formed in the side, away from the tailstock center, of the sleeve, and the push rod is arranged in the stepped hole in a sliding mode; a sensor hole is formed in the push rod, a pressure sensor is arranged at the bottom of the sensor hole, an elastic part is arranged in the sensor hole, one end of the elastic part abuts against the pressure sensor, the other end of the elastic part abuts against the bottom of the stepped hole, and a pull-back rod is fixedly connected with one end, away from the tailstock center, of the connecting plate and one end, away from the tailstock center, of the sleeve;

the grinding and feeding mechanism comprises a base, the headstock base and the tailstock base are both arranged on the base, two first sliding rails which are parallel to each other are fixedly connected onto the base, a first sliding table is arranged on the first sliding rails in a sliding mode, one side, close to the base, of the first sliding table is fixedly connected with a first lower nut fixing seat, a second lower nut fixing seat is fixedly connected onto the base between the two first sliding rails, a second lead screw which is parallel to the first sliding rails is connected onto the first lower nut fixing seat and the second lower nut fixing seat in a threaded mode, and a third servo motor is fixedly connected onto the end portion of the second lead screw; one side, away from the base, of the first sliding table is fixedly connected with two second sliding rails which are parallel to each other, the second sliding rails are perpendicular to the first sliding rails, a first upper nut fixing seat is fixedly connected onto the sliding table between the two second sliding rails, a third lead screw which is parallel to the second sliding rails is in threaded connection onto the first upper nut fixing seat, and a fourth servo motor is fixedly connected onto the end portion of the third lead screw; a second sliding table is connected to the second sliding rail in a sliding mode, a grinding motor is arranged on one side, away from the second sliding rail, of the second sliding table, and a grinding wheel is fixedly connected to an output shaft of the grinding motor; and the grinding motor, the pressure sensor, the second servo motor, the third servo motor and the fourth servo motor are all electrically connected with a controller.

Further, the headstock comprises a headstock seat and a first servo motor, the headstock seat is fixedly mounted on the base, the first servo motor is electrically connected with the controller, the headstock seat is rotatably connected with a headstock main shaft, one end of the headstock main shaft is fixedly connected with a first servo motor, the other end of the headstock main shaft is fixedly connected with a headstock center, a headstock flange is fixedly connected to the part of the headstock main shaft, which is located at the headstock center, the headstock flange is sleeved with a fixing ring in a rotating mode, the fixing ring is fixedly connected to the headstock seat, and the clamp is fixedly connected to one side, away from the rotating part, of the headstock flange.

Further, the fixture comprises an L-shaped clamping block, one end of the L-shaped clamping block is perpendicular to and fixedly connected with the headstock flange, a through groove is formed in the part, away from the headstock flange, of the L-shaped clamping block, a sliding V-shaped clamping block and a fixed V-shaped clamping block are arranged in the through groove, the sliding V-shaped clamping block is arranged in the through groove in a sliding mode, the fixed V-shaped clamping block is fixedly connected with the L-shaped clamping block, a threaded hole communicated with the through groove is formed in one end, away from the headstock flange, of the L-shaped clamping block, a screw rod is connected with the threaded hole in a threaded mode, and one end, located in the through groove, of the screw rod abuts against the sliding V-shaped clamping block. When needs centre gripping camshaft, wear to establish the camshaft and place between slip V type clamp splice and fixed V type clamp splice, then the downthehole screw rod of rotatory screw thread, the screw rod is rotating and is promoting the direction motion of slip V type clamp splice to fixed V type clamp splice to the centre gripping that stabilizes the camshaft.

Further, rolling bearings are fixedly sleeved at two ends of the headstock main shaft, and outer rings of the rolling bearings are fixedly connected with the outer wall of the headstock hole in the base. When the headstock main shaft rotates, the headstock main shaft rotates relative to the headstock hole, and a rolling bearing is arranged between the headstock main shaft and the headstock hole in a cushioning mode, so that the rotating friction force of the headstock main shaft can be reduced, the headstock main shaft can rotate more stably, and the noise in the rotating process can be reduced.

Furthermore, a U-shaped groove is formed in one side, away from the headstock main shaft, of the headstock flange, a headstock driving block is fixedly connected in the U-shaped groove, a transverse groove is formed in a part, close to the headstock flange, of the L-shaped clamping block, and the headstock driving block is fixedly connected in the transverse groove. Therefore, the L-shaped clamping block can be detachably and fixedly arranged on the head frame flange plate, and the L-shaped clamping block is convenient to replace.

Furthermore, a sealing sleeve is sleeved at one end, close to the tailstock center, of the sleeve in a sliding mode, the sealing sleeve is fixedly connected with one end, close to the tailstock center, of the tailstock sleeve, an oil filling hole communicated with the second through hole is formed in the tailstock sleeve, and a sealing screw is connected to the oil filling hole in a threaded mode. When the tailstock sleeve is used, the sealing screw can be unscrewed, lubricating oil is injected into the second through hole through the oil injection hole, and when the sleeve slides back and forth in the second through hole of the back and forth tailstock sleeve, the lubricating oil is lubricated, so that the sleeve drives the tailstock to move back and forth more smoothly.

Further, the pull-back rod is a pull-back bolt, a threaded through hole is formed in the connecting plate, a threaded blind hole is formed in one end, away from the tailstock center, of the sleeve, and the pull-back bolt is in threaded connection with the threaded through hole and the threaded blind hole. When the tailstock center needs to be retracted, the second servo motor drives the first screw rod to rotate reversely, so that the connecting plate is driven to be pulled in the direction away from the camshaft, and the sleeve and the tailstock center fixed on the sleeve are pulled back by the aid of the pull-back bolt.

Furthermore, a third through hole and a fourth through hole are formed in the connecting plate, a second lead screw nut is arranged in the third through hole and fixedly connected with the connecting plate, the first lead screw is in threaded connection with the second lead screw nut, and the push rod penetrates through the fourth through hole and is fixedly connected with the connecting plate. Therefore, the first screw rod and the second screw rod nut rotate relatively, and the first screw rod can drive the connecting plate to move back and forth, so that the push rod is driven to move back and forth.

Further, first slide rail and second slide rail are linear guide, be provided with the first slider that matches with first slide rail on the first slip table, be provided with the second slider that matches with the second slide rail on the second slip table, first slider slides and sets up on first slide rail, the second slider slides and sets up on the second slide rail. The slide rail of the linear guide rail enables the slide block to slide on the slide rail more stably and smoothly.

Further, a grinding wheel cover is fixedly connected to the first sliding table, the grinding wheel is located in the grinding wheel cover, a spray pipe is arranged on the grinding wheel cover, and the outlet end of the spray pipe is located right above the grinding wheel; a motor cover is sleeved outside the grinding motor and fixedly connected to the second sliding table; an inner protective cover is further arranged on one side, away from the first sliding rail, of the first sliding table, and the motor cover and the grinding wheel cover are both arranged in the inner protective cover; a liquid receiving funnel is arranged right below the grinding wheel, a liquid discharging groove is arranged on the base and located right below the liquid receiving funnel, and a liquid discharging hole is formed in the liquid discharging groove. The arrangement of the motor cover can firstly partially reduce noise generated by the motor and also can prevent grinding fluid which is possibly leaked from contacting the grinding motor; the inner protective cover can protect the whole grinding wheel grinding mechanism, the grinding fluid is prevented from splashing outwards, the waste grinding fluid generated by cooling the grinding wheel enters a fluid discharge groove on the base along the fluid receiving funnel after being blocked by the grinding wheel cover, and then flows out through the fluid discharge hole, so that the grinding fluid is recycled.

The invention has the beneficial effects that:

1. when the head frame rotates, the transmission of the whole head frame flange plate is very stable under the limiting action of the head frame flange plate on the fixing ring and the limiting action of the head frame main shaft on the rolling bearing, and the head frame flange plate and the head frame main shaft are prevented from moving in the rotating process, so that the camshaft can be effectively clamped and stably rotated when rotating, and the processing precision of the camshaft is improved.

2. When the tailstock of the camshaft grinding machine is used, the headstock top abuts against one end of a camshaft, the tailstock top aligns at the other end of the camshaft, then the controller controls and starts the second servo motor, the second servo motor rotates to drive the first lead screw to rotate, the first lead screw rotates to drive the connecting plate to linearly move along the first lead screw, and the connecting plate moves towards the direction of the tailstock sleeve to further push the sleeve and the tailstock top to move so as to clamp the camshaft. When the camshaft grinds, the elastic component can play the effect of adjusting the buffering, avoids the tailstock top to offset with the rigidity of camshaft to can realize the flexible processing of camshaft.

3. When the camshaft is processed, the pressure sensor can measure the acting force of the push rod on the sleeve at any time, namely the clamping force of the tailstock center and the headstock center on the camshaft can be indirectly detected, so that the clamping force on the camshaft is detected to be in a virtual pressure or overpressure state, when the pressure is too high or too low, the pressure sensor transmits the detected data to the controller, the controller can control the second servo motor to rotate forwards or backwards again to drive the connecting plate to move linearly, further the thrust of the push rod on the sleeve is adjusted, the clamping pressure of the camshaft is adjusted, the camshaft is always kept under the proper clamping force, and the processing precision of the camshaft is guaranteed.

4. In the whole position adjusting process of the grinding wheel, the cross sliding table structure is adopted, so that the position of the grinding wheel can be accurately adjusted, and the grinding precision of the camshaft grinding machine is improved.

5. In the whole grinding process, grinding fluid flows out through the fluid receiving funnel, the fluid discharging groove and the fluid discharging hole, and the grinding fluid splashed during grinding is blocked by the motor cover, the grinding wheel cover and the inner protective cover, so that the splashed grinding fluid can be prevented from splashing to a feeding sliding table area, the dry and wet division of the camshaft grinding machine is realized, the grinding fluid is prevented from entering a machine tool movement area, the service life of the machine tool is prolonged, and the influence on the working environment is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a high-precision high-speed follow-up camshaft grinding machine of the invention;

FIG. 2 is a schematic diagram of the construction of the headgear of FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 with the head mount removed;

FIG. 4 is a schematic view of the tailstock shown in FIG. 1;

fig. 5 is a schematic partial cross-sectional view of the tailstock sleeve of fig. 4.

FIG. 6 is a schematic view of a first angular configuration of the grinding feed mechanism of the present invention;

FIG. 7 is a schematic view of the inner shield shown in FIG. 6 with the inner shield removed;

FIG. 8 is a second angular configuration of the grinding feed mechanism of the present invention;

fig. 9 is a schematic structural view of fig. 8 with the base removed.

The device comprises a headstock 1, a headstock base 101, a first servo motor 102, a headstock spindle 103, a rolling bearing 104, a first speed reducer 105, a headstock tip 106, a headstock flange 107, a fixing ring 108, an L-shaped clamping block 109, a U-shaped groove 110, a headstock driving block 111, a transverse groove 112, a through groove 113, a sliding V-shaped clamping block 114, a fixing V-shaped clamping block 115 and a screw 116;

the tailstock comprises a tailstock 2, a tailstock seat 201, a vertical plate 202, a tailstock sleeve 203, a first through hole 204, a second through hole 205, a second servo motor 206, a first lead screw 207, a coupler 208, a connecting plate 209, a push rod 210, a sleeve 211, a second lead screw nut 212, a tailstock center 213, a first stepped hole 214, a second stepped hole 215, a sensor hole 216, a pressure sensor 217, a spring 218, a pull-back bolt 219, a sealing sleeve 220 and a sealing screw 221;

the device comprises a base 301, a first slide rail 302, a first sliding table 303, a first lower nut fixing seat 304, a second lower nut fixing seat 305, a second screw rod 306, a third servo motor 307, a second speed reducer 308, a second slide rail 309, a first upper nut fixing seat 310, a third screw rod 311, a fourth servo motor 312, a third speed reducer 313, a second sliding table 314, a grinding motor 315, a grinding wheel 316, a motor cover 317, a grinding wheel cover 318, a spray pipe 319, a liquid receiving funnel 320, a liquid discharge groove 321, a liquid discharge hole 322, an inner protective cover 323, a first sliding block 324 and a second sliding block 325; a camshaft 4.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

as shown in fig. 1-9:

a high-precision high-speed follow-up camshaft grinding machine comprises a clamping mechanism and a grinding feeding mechanism, wherein the clamping mechanism comprises a headstock 1 and a tailstock 2, the headstock 1 comprises a headstock base 101 and a first servo motor 102, a transverse headstock hole is formed in the headstock base 101, a headstock main shaft 103 is rotatably connected in the headstock hole, rolling bearings 104 are sleeved on two ends of the headstock main shaft 103 in an interference fit manner, the outer ring of each rolling bearing 104 is fixedly connected with the outer wall of the headstock hole in the headstock base 101 in an interference fit manner, one end of the headstock main shaft 103 penetrates out of the headstock hole and is connected with a first speed reducer 105 through a flat key, the first speed reducer 105 is fixedly connected with an output shaft of the first servo motor 102 through a flat key, the other end of the headstock main shaft 103 penetrates out of the headstock hole and is fixedly connected with a headstock center 106 through a flat key, a headstock flange 107 is fixedly connected on the part, located on the headstock main shaft 103, of the headstock center 106, through a bolt, a fixing ring 108 is rotatably sleeved on the head frame flange 107, and the fixing ring 108 is fixedly connected to the head frame base 101 through bolts.

A clamp is fixedly connected to one side of the head frame flange 107 far away from the first servo motor 102; the clamp comprises an L-shaped clamping block 109, a U-shaped groove 110 is formed in one side, away from a headstock main shaft 103, of a headstock flange plate 107, a headstock driving block 111 is fixedly connected in the U-shaped groove 110 through bolts, a transverse groove 112 is formed in a part, close to the headstock flange plate 107, of the L-shaped clamping block 109, the headstock driving block 111 is fixedly connected in the transverse groove 112 through bolts, a through groove 113 is formed in a part, away from the headstock flange plate 107, of the L-shaped clamping block 109, a sliding V-shaped clamping block 114 and a fixed V-shaped clamping block 115 are arranged in the through groove 113, the sliding V-shaped clamping block 114 is slidably arranged in the through groove 113, the fixed V-shaped clamping block 115 is fixedly connected with the L-shaped clamping block 109, a threaded hole communicated with the through groove 113 is formed in one end, away from the headstock flange plate 107, of the L-shaped clamping block 109, a screw 116 is connected with a screw hole through the threaded connection, and one end, located in the through groove 113, abuts against the sliding V-shaped clamping block 114; the other end of the screw 116 is provided with a hexagonal blind hole.

The tailstock 2 comprises a tailstock seat 201, a vertical plate 202 and a tailstock sleeve 203 which are integrally formed are fixedly connected onto the tailstock seat 201 through bolts, a first through hole 204 is formed in the vertical plate 202, a second through hole 205 is formed in the tailstock sleeve 203, a second servo motor 206 is fixedly connected to the first through hole 204 of the vertical plate 202 through bolts, an output shaft of the second servo motor 206 penetrates through the first through hole 204 and is fixedly connected with a first lead screw 207, a coupling 208 is fixedly connected between an output shaft of the second servo motor 206 and the first lead screw 207, the first lead screw 207 is in threaded connection with a connecting plate 209, a push rod 210 is further fixedly connected onto the connecting plate 209, a sleeve 211 is arranged in the second through hole 205 in a sliding manner, a third through hole and a fourth through hole are formed in the connecting plate 209, a second lead screw nut 212 is arranged in the third through hole, the second lead screw nut 212 is fixedly connected with the connecting plate 209 through bolts, the first lead screw 207 is in threaded connection with the second lead screw nut 212, the push rod 210 penetrates through the fourth through hole to be fixedly connected with the connecting plate 209; one end of the sleeve 211 is fixedly connected with a tailstock center 213, a stepped hole is formed in one side, away from the tailstock center 213, of the sleeve 211, the stepped hole comprises a first stepped hole 214 and a second stepped hole 215, the diameter of the second stepped hole 215 is smaller than that of the first stepped hole 214, and the push rod 210 is slidably arranged in the first stepped hole 214; a sensor hole 216 is formed in the push rod 210, a pressure sensor 217 is arranged at the bottom of the sensor hole 216, a spring 218 is arranged in the sensor hole 216, one end of the spring 218 abuts against the pressure sensor 217, and the other end of the spring 218 is located in the second step hole 215 and abuts against the bottom of the second step hole 215.

One end of the connecting plate 209 and the sleeve 211, which are far away from the tailstock center 213, are fixedly connected with a pull-back bolt 219, a threaded through hole is formed in the connecting plate 209, one end of the sleeve 211, which is far away from the tailstock center 213, is provided with a threaded blind hole, and the pull-back bolt 219 is in threaded connection with the threaded through hole and the threaded blind hole.

The sleeve 211 is equipped with the seal cover 220 close to the gliding cover of the one end of tailstock centre 213, and the seal cover 220 is connected with tailstock centre 213's one end fixed connection with tailstock cover 203, is provided with the oil filler point with second through-hole 205 intercommunication on the tailstock cover 203, and threaded connection has sealing screw 221 on the oil filler point.

The grinding feeding mechanism comprises a base 301, two first sliding rails 302 which are parallel to each other are fixedly connected to the base 301 through bolts, a first sliding table 303 is arranged on the first sliding rail 302 in a sliding mode, a first lower nut fixing seat 304 is welded to the lower side of the first sliding table 303, two second lower nut fixing seats 305 are welded to the base 301 between the two first sliding rails 302, a second lead screw 306 which is parallel to the first sliding rail 302 is connected to the first lower nut fixing seat 304 and the second lower nut fixing seat 305 in a threaded mode, and a third servo motor 307 is fixedly connected to the end portion of the second lead screw 306; a second speed reducer 308 is arranged at the joint of the second screw rod 306 and the third servo motor 307. The upper side of the first sliding table 303 is fixedly connected with two second sliding rails 309 which are parallel to each other through bolts, the second sliding rails 309 are perpendicular to the first sliding rails 302, two first upper nut fixing seats 310 are fixedly connected to the sliding table between the two second sliding rails 309, a third lead screw 311 which is parallel to the second sliding rails 309 is connected to the first upper nut fixing seats 310 in a threaded mode, the end portion of the third lead screw 311 is fixedly connected with a fourth servo motor 312, and a third speed reducer 313 is arranged at the connection position of the third lead screw 311 and the fourth servo motor 312. The second sliding rail 309 is connected with a second sliding table 314 in a sliding mode, a grinding motor 315 is fixed to the upper side of the second sliding table 314 through bolts, two grinding wheels 316 are fixedly connected to an output shaft of the grinding motor 315, a motor cover 317 is sleeved outside the grinding motor 315, and the motor cover 317 is fixedly connected to the second sliding table 314.

A grinding wheel cover 318 is fixedly connected to the first sliding table 303, the grinding wheel 316 is located in the grinding wheel cover 318, two spray pipes 319 are mounted on the grinding wheel cover 318, the spray pipes 319 are communicated with an external water inlet pipe, and outlet ends of the spray pipes 319 are located right above the grinding wheel 316; a liquid receiving funnel 320 is arranged right below the grinding wheel 316, a liquid discharging groove 321 is arranged on the base 301, the liquid discharging groove 321 is positioned right below the liquid receiving funnel 320, a liquid discharging hole 322 is arranged on the liquid discharging groove 321, and the liquid discharging hole 322 can be accessed to a waste grinding liquid treatment system of a factory by using a water pipe. An inner protective cover 323 is further mounted on the upper side of the first sliding table 303 through bolts, and the motor cover 317 and the grinding wheel cover 318 are both arranged in the inner protective cover 323.

The first slide rail 302 and the second slide rail 309 are both linear guide rails, a first slide block 324 matched with the first slide rail 302 is arranged on the first sliding table 303, a second slide block 325 matched with the second slide rail 309 is arranged on the second sliding table 314, the first slide block 324 is arranged on the first slide rail 302 in a sliding manner, and the second slide block 325 is arranged on the second slide rail 309 in a sliding manner.

The grinding motor 315, the pressure sensor 217, the first servomotor 102, the second servomotor 206, the third servomotor 307, and the fourth servomotor 312 are electrically connected to a controller.

The using method of the invention is as follows:

before the camshaft grinding fixture is used, one end of the camshaft 4 is firstly arranged between the sliding V-shaped clamping block 114 and the fixed V-shaped clamping block 115 in a penetrating mode, so that the end portion of the camshaft 4 is abutted to the headstock tip 106, then the screw rod 116 is rotated by using a tool such as a hexagonal wrench, the screw rod 116 feeds into the through groove 113 in the rotating process, then the sliding V-shaped clamping block 114 is pushed to move towards the fixed V-shaped clamping block 115, and then the sliding V-shaped clamping block 114 and the fixed V-shaped clamping block 115 are utilized to effectively clamp the camshaft 4, and the camshaft 4 is prevented from moving in the grinding process. Then the controller controls to start the second servo motor 206, the second servo motor 206 rotates to drive the first lead screw 207 to rotate, the first lead screw 207 rotates to drive the connecting plate 209 to linearly move along the first lead screw 207, the connecting plate 209 moves towards the tailstock sleeve 203, and the push rod 210 is used for pushing the sleeve 211 and the tailstock center 213 to move forwards to clamp the camshaft 4.

When the camshaft 4 is ground, after the first servo motor 102 of the head frame 1 is decelerated by the first speed reducer 105, the head frame spindle 103 is driven to rotate, when the head frame spindle 103 rotates, the head frame spindle is stably rotated in the rolling bearing 104, and then the head frame flange 107 and the clamp are driven to rotate, when the clamp rotates, the camshaft 4 is driven to rotate, when the clamp rotates, the head frame flange 107 has a limiting effect on the fixing ring 108, and the head frame spindle 103 has a limiting effect on the rolling bearing 104, so that the transmission of the whole head frame flange 107 is very stable, and the phenomenon that the head frame flange 107 and the head frame spindle 103 move in the rotating process is avoided, so that the camshaft 4 can be effectively clamped and stably rotate when rotating, and the processing precision of the camshaft 4 is improved.

When the grinding wheel 316 is fed, the third servo motor 307 rotates to drive the second lead screw 306 to rotate, and the rotation of the second lead screw 306 drives the second lower nut fixing seat 305 and the first sliding table 303 fixed with the second lower nut fixing seat 305 to move transversely, so that the position of the grinding wheel 316 is transversely adjusted. Then, the fourth servo motor 312 rotates to drive the third screw rod 311 to rotate, and the rotation of the third screw rod 311 drives the first upper nut fixing seat 310 and the second sliding table 314 fixed to the first upper nut fixing seat 310 to move longitudinally, so as to longitudinally adjust the position of the grinding wheel 316. In the position adjustment process of the whole grinding wheel 316, the cross sliding table structure is adopted, so that the position of the grinding wheel 316 can be accurately adjusted, and the grinding precision of the camshaft 4 grinding machine is improved.

When the camshaft 4 is ground, the grinding motor 315 drives the grinding wheel 316 to rotate at a high speed, the camshaft 4 is ground, in the grinding process, the spraying pipe 319 sprays grinding fluid, the camshaft 4 and the grinding wheel 316 are cooled, the cooled grinding fluid flows into the fluid receiving funnel 320 and then enters the fluid discharge groove 321, finally flows out of the fluid discharge hole 322, the fluid discharge hole 322 can be connected into a waste grinding fluid treatment system of a plant area by using a water pipe, and the waste grinding fluid is prevented from polluting the environment of the plant area.

When the camshaft 4 is ground, the spring 218 can play a role in adjusting and buffering, and the tailstock center 213 is prevented from being abutted against the rigidity of the camshaft 4, so that the flexible processing of the camshaft 4 can be realized. And, during processing, the pressure sensor 217 can measure the acting force of the push rod 210 on the sleeve 211 at any time, that is, the clamping force of the tailstock center 213 and the headstock center 106 on the camshaft 4 can be indirectly detected, so as to detect that the clamping force on the camshaft 4 is in a virtual pressure or overpressure state, when the pressure is too large or too small, the pressure sensor 217 transmits the detected data to the controller, the controller can control the forward rotation or reverse rotation of the second servo motor 206 again to drive the connecting plate 209 to move linearly, further, the thrust of the push rod 210 on the sleeve 211 is adjusted, the clamping pressure of the camshaft 4 is adjusted, so that the camshaft 4 is always kept under the proper clamping force, and the processing precision of the camshaft 4 is ensured.

In the whole grinding process, grinding fluid flows out through the fluid receiving hopper 320, the fluid discharging groove 321 and the fluid discharging hole 322, and the grinding fluid splashed during grinding can be prevented from splashing to the feeding sliding table area through the blocking of the motor cover 317, the grinding wheel cover 318 and the inner protective cover 323, so that the dry-wet partition of the camshaft 4 grinding machine is realized, and the influence on the working environment is reduced.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims

1. The utility model provides a high-speed follow-up camshaft grinding machine of high accuracy, includes fixture and grinding feed mechanism, its characterized in that: the clamping mechanism comprises a headstock and a tailstock, and a clamp is fixedly connected to the headstock; the tailstock comprises a tailstock seat, a first through hole and a second through hole are formed in the tailstock seat, a second servo motor is fixedly connected to the first through hole, an output shaft of the second servo motor penetrates through the first through hole and is fixedly connected with a first lead screw, the lead screw is connected with a first lead screw nut, the first lead screw nut is connected with a connecting plate, a push rod is further fixedly connected to the connecting plate, and a sleeve is arranged in the second through hole in a sliding mode; one end of the sleeve is fixedly connected with a tailstock center, a stepped hole is formed in the side, away from the tailstock center, of the sleeve, and the push rod is arranged in the stepped hole in a sliding mode; a sensor hole is formed in the push rod, a pressure sensor is arranged at the bottom of the sensor hole, an elastic part is arranged in the sensor hole, one end of the elastic part abuts against the pressure sensor, the other end of the elastic part abuts against the bottom of the stepped hole, and a pull-back rod is fixedly connected with one end, away from the tailstock center, of the connecting plate and one end, away from the tailstock center, of the sleeve;

2. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 1, wherein: the headstock comprises a headstock seat and a first servo motor, the headstock seat is fixedly mounted on the base, the first servo motor is electrically connected with the controller, the headstock seat is rotatably connected with a headstock main shaft, one end of the headstock main shaft is fixedly connected with a first servo motor, the other end of the headstock main shaft is fixedly connected with a headstock tip, the headstock main shaft is located on the part of the headstock tip and is fixedly connected with a headstock flange, a rotating sleeve is arranged on the headstock flange and is provided with a fixing ring, the fixing ring is fixedly connected on the headstock seat, and the clamp is fixedly connected on one side, away from the rotating part, of the headstock flange.

3. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 2, wherein: the fixture comprises an L-shaped clamping block, one end of the L-shaped clamping block is perpendicular to and fixedly connected with the headstock flange, a through groove is formed in the part, away from the headstock flange, of the L-shaped clamping block, a sliding V-shaped clamping block and a fixed V-shaped clamping block are arranged in the through groove, the sliding V-shaped clamping block is arranged in the through groove in a sliding mode, the fixed V-shaped clamping block is fixedly connected with the L-shaped clamping block, a threaded hole communicated with the through groove is formed in one end, away from the headstock flange, of the L-shaped clamping block, a screw rod is connected with the threaded hole in a threaded mode, and one end, located in the through groove, of the screw rod abuts against the sliding V-shaped clamping block.

4. A high-precision high-speed follow-up camshaft grinding machine according to claim 3, characterized in that: and rolling bearings are fixedly sleeved at two ends of the headstock main shaft, and outer rings of the rolling bearings are fixedly connected with the outer wall of the headstock hole on the base.

5. A high-precision high-speed follow-up camshaft grinding machine according to claim 4, characterized in that: the U-shaped groove is formed in one side, away from the headstock main shaft, of the headstock flange plate, the headstock driving block is fixedly connected in the U-shaped groove, the transverse groove is formed in the part, close to the headstock flange, of the L-shaped clamping block, and the headstock driving block is fixedly connected in the transverse groove.

6. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 1, wherein: the tailstock structure comprises a tailstock center, a sleeve, a tailstock sleeve and a sealing sleeve, wherein the sleeve is sleeved on the tailstock center, one end of the sleeve, which is close to the tailstock center, is slidably provided with the sealing sleeve, the sealing sleeve is fixedly connected with one end, which is close to the tailstock center, of the tailstock sleeve, the tailstock sleeve is provided with an oil injection hole communicated with a second through hole, and the oil injection hole is in threaded connection with a sealing screw.

7. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 1, wherein: the drawing rod is a drawing bolt, a threaded through hole is formed in the connecting plate, a threaded blind hole is formed in one end, away from the tailstock center, of the sleeve, and the drawing bolt is in threaded connection with the threaded through hole and the threaded blind hole.

8. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 1, wherein: the connecting plate is provided with a third through hole and a fourth through hole, a second lead screw nut is arranged in the third through hole and fixedly connected with the connecting plate, the first lead screw is in threaded connection with the second lead screw nut, and the push rod penetrates through the fourth through hole and is fixedly connected with the connecting plate.

9. A high-precision high-speed follow-up camshaft grinding machine according to any one of claims 6 to 8, wherein: the first sliding rail and the second sliding rail are linear guide rails, a first sliding block matched with the first sliding rail is arranged on the first sliding table, a second sliding block matched with the second sliding rail is arranged on the second sliding table, the first sliding block is arranged on the first sliding rail in a sliding mode, and the second sliding block is arranged on the second sliding rail in a sliding mode.

10. A high-precision high-speed follow-up camshaft grinding machine as claimed in claim 1, wherein: a grinding wheel cover is fixedly connected to the first sliding table, the grinding wheel is located in the grinding wheel cover, a spray pipe is arranged on the grinding wheel cover, and the outlet end of the spray pipe is located right above the grinding wheel; a motor cover is sleeved outside the grinding motor and fixedly connected to the second sliding table; an inner protective cover is further arranged on one side, away from the first sliding rail, of the first sliding table, and the motor cover and the grinding wheel cover are both arranged in the inner protective cover; a liquid receiving funnel is arranged right below the grinding wheel, a liquid discharging groove is arranged on the base and located right below the liquid receiving funnel, and a liquid discharging hole is formed in the liquid discharging groove.