CN114473727A - A multi-rotation high-rigidity vertical grinding machine - Google Patents

Abstract

The invention relates to the technical field of grinding machines, in particular to a multi-rotation high-rigidity vertical grinding machine, comprising a bed, a Y-axis feeding mechanism, a Z-axis feeding mechanism, an X-axis workpiece positioning turntable and a grinding mechanism, wherein the grinding mechanism includes a main shaft Seat, grinding motorized spindle, grinding wheel, rotary oil cylinder and limit structure, the end of the grinding motorized spindle is connected to the grinding wheel, the rotary oil cylinder drives the spindle seat to swing relative to the vertical line within a preset range, the limit structure and the rotary oil cylinder together The spindle seat after swinging is fixed, and the structure is rigid enough. The sand-dressing mechanism includes a sand-dressing support seat, a turning seat, a sand-dressing roller, a sand-dressing electric spindle and a turning-over drive mechanism. The sand repair state is switched between these two states. It can provide more space for tool change, reduce the occupied space, and the function and function of rotation achieve the same effect with lower cost consumption.

Description

A multi-rotation high-rigidity vertical grinding machine

technical field

The invention relates to the technical field of grinding machines, in particular to a multi-rotation high-rigidity vertical grinding machine.

Background technique

With the development of science and technology, the requirements for the accuracy of production devices in all walks of life are getting higher and higher, and the corresponding requirements for the accuracy and surface of the components that make up these production devices also increase, and many components are assembled before assembly. , It needs to be ground and polished. At present, the main shaft of the workpiece of the existing vertical grinder is installed on the mold frame, the mold frame is installed on the beam and moves along the Y axis (left and right direction), and the mold frame is suspended on the beam and along the Z axis (up and down). direction) movement, the beam is installed on the column, the column is installed on the bed, the grinding spindle is installed on the mold base, the workpiece clamping mechanism is installed on the bed, the grinding spindle can move left and right on the Y axis, and move up and down on the Z axis, To grind the workpiece clamped on the X axis.

The grinding wheel of the existing vertical grinding machine can only translate laterally or longitudinally, and it is difficult to grind the conical surface or the inclined surface of the workpiece. Moreover, the grinding machine in the prior art is limited by the sand dressing mechanism and the grinding wheel magazine, and the moving space of the grinding wheel is limited, or the grinding machine is large due to the large distance of the internal modules, and the grinding wheel moves a large distance to realize tool change or sand dressing. cause high energy consumption.

SUMMARY OF THE INVENTION

Aiming at some or all of the above-mentioned technical problems in the prior art, the present invention provides a multi-rotation high-rigidity vertical grinding machine.

For achieving the above object, the present invention provides the following technical solutions:

Provides a multi-rotation high-rigidity vertical grinding machine, including a bed, a Y-axis feed mechanism, a Z-axis feed mechanism, an X-axis workpiece positioning turntable and a grinding mechanism, and the X-axis workpiece positioning turntable is installed on the bed for limiting The grinding mechanism is driven by the Y-axis feeding mechanism and the Z-axis feeding mechanism to move laterally and longitudinally; the Z-axis feeding mechanism includes a Z-axis slide and a Z-axis drive module for driving the Z-axis slide longitudinally. It is characterized in that: the grinding mechanism includes a spindle seat, a grinding electric spindle, a grinding wheel, a rotating oil cylinder and a limit structure, the end of the grinding electric spindle is connected with the grinding wheel to drive the rotation of the grinding electric spindle, the grinding electric spindle is fixed on the spindle seat, and the spindle seat is rotatable. It is installed on the Z-axis slide plate, the cylinder barrel of the rotary oil cylinder is hinged to the Z-axis slide plate, and the telescopic rod of the rotary oil cylinder is hinged to the main shaft seat to drive the main shaft seat to swing within a preset range relative to the vertical line. The limit structure and the rotary oil cylinder are common. Fix the swinging spindle seat;

There is a grinding wheel magazine on the side of the grinding machine, and a sand dressing mechanism is located between the X-axis workpiece positioning turntable and the grinding wheel magazine. Mechanism, the sand dressing roller is fixed on the output shaft of the sand dressing motorized spindle, the sand dressing motorized spindle is fixed on the flip seat, the flip seat is rotatably installed on the sand dressing support seat, and the flip drive mechanism drives the flip seat to rotate, so that the sand dressing motor spindle is rotated. Switch between the two states of the laterally giving way and the erected sand repairing state.

Specifically, the rotary oil cylinder includes a first oil cylinder and a second oil cylinder, and the telescopic rods of the first oil cylinder and the second oil cylinder are symmetrically hinged on both sides of the main shaft seat.

Specifically, the limit structure includes a V-shaped first limit block and a second limit block, the openings of the first limit block and the second limit block are arranged laterally opposite to each other; the back of the spindle seat is provided with a limit protrusion, The limiting protrusion is movably located between the first limiting block and the second limiting block.

Specifically, the Z-axis sliding seat has a plurality of installation holes, and the second limit block is detachably installed in different installation holes to adjust the distance between the first limit block and the second limit block, and then adjust the main shaft The swing angle of the seat.

Specifically, the position of the Z-axis slide seat below the main shaft seat is provided with an induction switch, and the induction switch and the rotary oil cylinder are respectively electrically connected to the peripheral control system.

Specifically, the grinding wheel is connected with a tool handle, the tool handle is detachably clamped to the grinding electric spindle, and the grinding wheel and the tool handle form a grinding wheel group;

The grinding wheel library includes a vertically arranged support turntable and a C-axis motor that drives the support turntable to rotate. A plurality of elastic claws are arranged on the peripheral side of the support turntable, one of which is empty, and the other elastic claws are provided with grinding wheels for grinding. The electric spindle is replaced, the Y-axis feeding mechanism and the Z-axis feeding mechanism can move the grinding mechanism to the X-axis workpiece positioning turntable, the sand dressing mechanism and the grinding wheel magazine.

Specifically, each elastic claw is provided with a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm are formed with a clamping opening that can be elastically opened and closed, and the side wall of the clamping opening is provided with inlaid protrusions The upper end of the knife handle is provided with an inlay groove, so that after the knife handle is inserted into the clamping opening, the inlaid protrusion of the knife handle is inserted into the inlaid groove.

Specifically, the turning drive mechanism includes a gear, a rack and a turning cylinder, the gear is fixedly connected with the rotating shaft of the turning seat, the gear and the rack are meshed with each other, and the telescopic rod of the turning cylinder is connected with the rack to drive the rack to reciprocate.

Specifically, the Z-axis drive module includes a Z-axis support base, a Z-axis guide rail, a Z-axis screw, a Z-axis screw nut, and a Z-axis drive motor. The Z-axis screw and the Z-axis guide are juxtaposed and longitudinally arranged on the Z-axis. The shaft support seat, the Z-axis screw nut and the Z-axis screw are threaded, and the Z-axis screw is connected to the output shaft of the Z-axis drive motor; the back of the Z-axis slide is fixedly connected to the Z-axis screw nut, and slides with the Z-axis guide rail.

Specifically, the Y-axis feeding mechanism includes a Y-axis support seat, a Y-axis guide rail, a Y-axis screw, a Y-axis screw nut and a Y-axis drive motor, the Y-axis support seat is fixed on the bed, the Y-axis guide rail and the Y-axis screw The rods are arranged side by side on the Y-axis support seat, the Y-axis screw nut is threaded with the Y-axis screw, the Y-axis screw is connected to the output shaft of the Y-axis drive motor, and the back of the Z-axis support seat is fixedly connected to the Y-axis screw rod nut, and slides to fit the Y-axis guide.

Beneficial effects of the present invention:

Compared with the prior art, the multi-rotation high-rigidity vertical grinding machine of the present invention is provided with a rotary oil cylinder to drive the grinding electric spindle to rotate and oscillate, and combined with the limit structure, the grinding wheel is in an inclined state, which is convenient for processing the tapered surface or the inclined surface. The rigid structure does not need to extend too much, the structure is rigid enough, and the rotary oil cylinder pushes the rotation and the hard limit, which can change the angle control of the rotation. Moreover, in terms of spatial arrangement, the grinding wheel magazine is arranged on the side of the bed, and the sand dressing mechanism is located between the workpiece and the grinding wheel magazine. The space is fully utilized, which can minimize the occupied space. The grinding mechanism can directly carry out the grinding wheel dressing after changing the tool from the grinding wheel magazine, and the rotation function and effect achieve the same effect and the cost consumption is lower.

Description of drawings

FIG. 1 is a schematic structural diagram of a vertical grinder in an embodiment.

FIG. 2 is another visual structural schematic diagram of the vertical grinder in the embodiment.

FIG. 3 is a schematic structural diagram of the grinding wheel magazine in the embodiment.

FIG. 4 is a schematic structural diagram of the grinding mechanism in the embodiment.

FIG. 5 is a cross-sectional view of the grinding mechanism in the embodiment.

FIG. 6 is a schematic structural diagram of the sand dressing mechanism in the embodiment.

FIG. 7 is another schematic view of the sand dressing mechanism in the embodiment.

FIG. 8 is a cross-sectional view of the sand dressing mechanism in the embodiment.

FIG. 9 is a schematic structural diagram of the sand dressing mechanism of the embodiment in a laterally laid down state (a view turned upside down).

Reference number:

bed 1;

Y-axis feed mechanism 2, Y-axis support base 21, Y-axis guide rail 22, Y-axis screw 23;

Z-axis feed mechanism 3, Z-axis slide plate 31, mounting hole 311, Z-axis support seat 32, Z-axis guide rail 33, Z-axis drive motor 34;

X-axis workpiece positioning turntable 4;

Grinding mechanism 5, spindle seat 51, limit protrusion 511, grinding motor spindle 52, grinding wheel 53, rotary oil cylinder 54, first oil cylinder 541, second oil cylinder 542, limit structure 55, first limit block 551, No. Two limit blocks 552, induction switch 56;

Grinding wheel magazine 6, tool handle 61, support turntable 62, C-axis motor 63, elastic jaw 64, first elastic arm 641, second elastic arm 642, clamping port 643, inlaid protrusion 644;

Sand repairing mechanism 7, sand repairing support seat 71, storage groove 711, abdication hole 712, overturn guide rail 72, overturn seat 73, sand repair roller 74, sand repair electric spindle 75, overturn drive mechanism 76, gear 761, rack 762. Turn over the oil cylinder 763.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

The vertical grinding machine of this embodiment, as shown in Figures 1 to 9, includes a bed 1, a Y-axis feeding mechanism 2, a Z-axis feeding mechanism 3, an X-axis workpiece positioning turntable 4 and a grinding mechanism 5, and the X-axis workpiece The positioning turntable 4 is installed on the bed 1 to limit the workpiece. The X-axis workpiece positioning turntable 4 is a hydrostatic turntable, which provides oil pressure and cooling oil circuit to the turntable through a hydraulic station and an oil cooler. The workpiece to be ground is inserted into the locked annular cylinder. The Z-axis feeding mechanism 3 includes a Z-axis sliding plate 31 and a Z-axis driving module for driving the Z-axis sliding plate 31 to move longitudinally. The Z-axis driving module includes a Z-axis support seat 32, a Z-axis guide rail 33, a Z-axis screw rod, The Z-axis screw nut and the Z-axis drive motor 34, the Z-axis screw and the Z-axis guide rail 33 are arranged side by side on the Z-axis support seat 32 in the longitudinal direction, the Z-axis screw nut and the Z-axis screw are threaded, and the Z-axis screw The rod is connected to the output shaft of the Z-axis drive motor 34 ; the back of the Z-axis slide plate 31 is fixedly connected to the Z-axis screw nut, and slidably fits the Z-axis guide rail 33 .

In this embodiment, the Y-axis feeding mechanism 2 includes a Y-axis support seat 21, a Y-axis guide rail 22, a Y-axis screw 23, a Y-axis screw 23 nut and a Y-axis drive motor, and the Y-axis support seat 21 is fixed on the bed 1. The Y-axis guide rail 22 and the Y-axis screw 23 are arranged side by side on the Y-axis support base 21, the Y-axis screw 23 is threaded with the Y-axis screw 23, and the Y-axis screw 23 is connected to the Y-axis drive motor The back of the Z-axis support base 32 is fixedly connected to the nut of the Y-axis screw 23 , and slidably fits the Y-axis guide rail 22 .

The grinding mechanism 5 is fixed on the Z-axis sliding plate 31 of the Z-axis feeding mechanism, so as to be driven by the Y-axis feeding mechanism 2 and the Z-axis feeding mechanism 3 to be able to move laterally and longitudinally. Both the Y-axis drive motor and the Z-axis drive motor 34 are servo motors, combined with a high-resolution grating ruler to form a fully closed-loop design. The high-resolution grating ruler can monitor and feedback the moving positions of the Y-axis and Z-axis in real time. After the position information is fed back to the control system in the background, the system can compensate the gap error caused by the screw structure to achieve higher accuracy.

In this embodiment, the grinding mechanism 5 includes a spindle base 51, a grinding electric spindle 52, a grinding wheel 53, a rotary oil cylinder 54 and a limit structure 55. The end of the grinding electric spindle 52 is connected to the grinding wheel 53 to drive the rotation of the grinding electric spindle. The outer shell of 52 is fixed to the main shaft seat 51, the main shaft seat 51 is rotatably installed on the Z-axis slide plate 31 through the shaft combined with the bearing, the cylinder of the rotary oil cylinder 54 is hinged to the Z-axis slide plate 31, and the telescopic rod of the rotary oil cylinder 54 is hinged to the main shaft seat 51. , in order to drive the main shaft seat 51 to swing relative to the vertical line within a preset range, the limiting structure 55 constrains the swing range of the main shaft seat 51 , and combined with the rotary oil cylinder 54 to fix the oscillated main shaft seat 51 .

The rotary oil cylinder 54 includes a first oil cylinder 541 and a second oil cylinder 542 , and the telescopic rods of the first oil cylinder 541 and the second oil cylinder 542 are symmetrically hinged on both sides of the main shaft seat 51 . The limit structure 55 includes a V-shaped first limit block 551 and a second limit block 552, the openings of the first limit block 551 and the second limit block 552 are arranged laterally opposite to each other; the back of the spindle seat 51 is provided with a limit The protrusion 511 , the limiting protrusion 511 is movably located between the first limiting block 551 and the second limiting block 552 . The Z-axis sliding seat has a plurality of installation holes 311, and the second limit block 552 is detachably installed in different installation holes 311 to adjust the distance between the first limit block 551 and the second limit block 552, and then Adjust the swing angle of the spindle base 51 . A sensor switch 56 is provided on the Z-axis slide below the spindle seat 51 , and the sensor switch 56 and the rotary oil cylinder 54 are respectively electrically connected to the peripheral control system, so that after the spindle seat 51 approaches or triggers the sensor switch 56 , the sensor switch 56 The in-position signal is transmitted to the control system, and the control system controls the expansion and contraction degree of the rotary oil cylinder 54. The induction switch 56 is an existing switch, which is used by software engineers after programming, and is realized by building a computer function module.

In use, when the grinding wheel 53 needs to be in a horizontal state, the first oil cylinder 541 and the second oil cylinder 542 retract at the same time, so that the two sides of the spindle seat 51 receive a uniform force to maintain balance. Because the rotary oil cylinder 54 is provided to drive the electric grinding spindle 52 to rotate and swing, and the limit structure 55 is used to make the grinding wheel 53 in an inclined state, which is convenient for processing the tapered surface or the inclined surface. The upper rotary oil cylinder 54 pushes the rotation and the hard limit, which can change the angle control of the rotation.

In this embodiment, a grinding wheel magazine 6 is provided on the side of the grinding machine, and a sand dressing mechanism 7 is located between the X-axis workpiece positioning turntable 4 and the grinding wheel magazine 6 , and the sand dressing mechanism 7 includes a sand dressing support seat 71 and a turning seat 73 . , a sand repairing roller 74, a sanding electric spindle 75 and a turning drive mechanism 76, the sanding roller 74 is fixed on the output shaft of the sanding electric spindle 75, and the sanding electric spindle 75 is fixed on the turning seat 73, and the turning seat 73 is rotatably installed In the sand repairing support seat 71, the inversion driving mechanism 76 drives the inversion seat 73 to rotate, so that the sand repairing electric spindle 75 can be switched between two states of a put-down and upright state of sand repairing.

In this embodiment, the turning drive mechanism 76 includes a gear 761, a rack 762 and a turning cylinder 763. The gear 761 is fixedly connected to the rotating shaft of the turning base 73, the gear 761 and the rack 762 are meshed and connected to each other, and the telescopic rod of the turning cylinder 763 is connected to The rack 762 is connected to drive the rack 762 to reciprocate.

In this embodiment, the electric sand dressing spindle 75 is arranged obliquely, so that in the sand dressing state, the sand dressing electric spindle 75 and the sand dressing roller 74 are arranged obliquely upward. The sand dressing support base 71 is provided with a receiving groove 711, the gear 761 is located in the receiving groove 711, and the groove wall of the receiving groove 711 is provided with an escape hole 712, and the rack 762 passes through the escape hole 712 and meshes with the gear 761, which can avoid external force. Collision gear 761 ensures that the drive rollover proceeds normally. A turning guide rail 72 is provided in the receiving groove 711 , and the rack 762 is slidably matched with the turning guide rail 72 , so that the rack 762 can move stably in a straight line.

In this embodiment, in the abdicated state, the top surface of the inversion seat 73 is flush with the top surface of the sand dressing support seat 71, and the height of the sand repair roller 74 is lower than the top surface of the inversion seat 73, so as to ensure the grinding wheel during the non-grinding process. The dressing roller 74 will not be hit.

In this embodiment, the flip seat 73 is a strip plate, and the flip support base is provided with a bearing and a connecting shaft. Both ends of the connecting shaft pass through the bearing to fix the gear 761 and one end of the strip plate respectively. the other end of the strip.

Compared with the prior art, the grinding wheel dressing device of the grinding machine in this embodiment adopts the grinding electric spindle 52 to control the grinding wheel 74 to rotate to perform grinding wheel dressing, and dressing the grinding wheel into a special shape for processing the end face and inner and outer diameter of the workpiece. More importantly, the rotary design is adopted, which can be rotated after finishing to provide more space for tool changing, making full use of the space. The rotation uses gear 761 and rack 762 combined with the oil cylinder to rotate, which can maximize the The occupied space is reduced, and the cost consumption is lower when the function and function of the rotation achieve the same effect. In the prior art, the sand dressing mechanism can't be placed upright or is arranged on the left side of the grinding machine, which will increase the movement stroke after tool change, resulting in lower processing efficiency.

In this embodiment, the grinding wheel 53 is connected with a tool handle 61, the tool handle 61 is detachably clamped to the grinding electric spindle 52, and the grinding wheel 53 and the tool handle 61 form a grinding wheel group; the grinding wheel magazine 6 includes a supporting turntable arranged vertically 62 and the C-axis motor 63 that drives the support turntable 62 to rotate. The peripheral side of the support turntable 62 is provided with a plurality of elastic claws 64, one of the elastic claws 64 is empty, and the other elastic claws 64 are provided with grinding wheels for grinding electricity. The spindle 52 is replaced. The grinding wheel magazine 6 in this embodiment is a six-station design. Five grinding wheel tool holders 61 with different lengths, grinding wheel thicknesses, and outer diameters are provided for different workpieces to be selected for processing requirements. The Y-axis feeding mechanism 2 and the Z-axis feeding mechanism 3 can move the grinding mechanism 5 to the X-axis workpiece positioning turntable 4 , the sand dressing mechanism 7 and the grinding wheel magazine 6 . Specifically, each elastic claw 64 is provided with a first elastic arm 641 and a second elastic arm 642. The first elastic arm 641 and the second elastic arm 642 are formed with a clamping port 643 that can be elastically opened and closed. The clamping port 643 The side wall of the knife handle 61 is provided with an inlaid protrusion 644, and the upper end of the knife handle 61 is provided with an inlaid groove, so that after the knife handle 61 is inserted into the clamping opening 643, the inlaid protrusion 644 of the knife handle 61 is inserted into the inlaid groove.

In this embodiment, the grinding motor spindle 52 adopts automatic tool changing and grinding motor spindle 52. For traditional machine tools, most of them use tool changing, but this embodiment adds an automatic grinding wheel replacement structure to the grinding machine, which can reduce a lot of It takes less time to manually replace the grinding wheel, and the traditional way of replacing the knife with the spindle uses a knife cylinder to push the spindle to loosen the knife, and the spring lamination is used to tighten the tool shank 61. This method is not rigid enough, and the tensioning force is insufficient. Insufficient, for grinding requirements that require high-speed rotation and high torque, vibration will easily lead to grinding failure. In this embodiment, the main shaft with the front four and the rear two bearing structure design is adopted, which can bring stable and high-precision runout when the long tool shank 61 is used to grind the deep hole, and adopts the HSK-A100 tool shank and double hydraulic pressure. Provide the pressure for tightening and loosening the knife, which can ensure high precision during high-speed rotation. Under the continuous oil pressure, the tool handle 61 will have a higher degree of fit and a higher precision with the longer rotation time. Stablize. The description is that the grinding motor spindle 52 and the HSK-A100 tool holder 61 are the existing parts purchased from outside.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that , the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A multi-rotation high-rigidity vertical grinding machine comprises a machine body, a Y-axis feeding mechanism, a Z-axis feeding mechanism, an X-axis workpiece positioning rotary table and a grinding mechanism, wherein the X-axis workpiece positioning rotary table is mounted on the machine body and used for limiting a workpiece, and the grinding mechanism can move transversely and longitudinally under the drive of the Y-axis feeding mechanism and the Z-axis feeding mechanism; z axle feed mechanism includes Z axle slide and is used for driving Z axle slide longitudinal movement's Z axle drive module, characterized by: the grinding mechanism comprises a spindle seat, a grinding electric spindle, a grinding wheel, a rotary oil cylinder and a limiting structure, wherein the end part of the grinding electric spindle is connected with the grinding wheel to drive the grinding wheel to rotate;

the side part of the grinding machine is provided with a grinding wheel warehouse, a sand dressing mechanism is arranged between the X-axis workpiece positioning rotary table and the grinding wheel warehouse, the sand dressing mechanism comprises a sand dressing support seat, a turnover seat, a sand dressing roller, a sand dressing electric spindle and a turnover driving mechanism, the sand dressing roller is fixed on an output shaft of the sand dressing electric spindle, the sand dressing electric spindle is fixed on the turnover seat, the turnover seat is rotatably installed on the sand dressing support seat, and the turnover driving mechanism drives the turnover seat to rotate, so that the sand dressing electric spindle is switched between a horizontal abdicating state and a vertical sand dressing state.

2. The multiple-rotation high-rigidity vertical grinding machine according to claim 1, wherein: the rotary oil cylinder comprises a first oil cylinder and a second oil cylinder, and telescopic rods of the first oil cylinder and the second oil cylinder are symmetrically hinged to two side parts of the main shaft seat.

3. The multiple-rotation high-rigidity vertical grinding machine according to claim 1, wherein: the limiting structure comprises a V-shaped first limiting block and a V-shaped second limiting block, and the openings of the first limiting block and the second limiting block are transversely arranged in opposite directions; the back of the main shaft seat is provided with a limiting bulge, and the limiting bulge is movably positioned between the first limiting block and the second limiting block.

4. A multiple-rotation high-rigidity vertical grinding machine according to claim 3, wherein: the Z-axis sliding seat is provided with a plurality of mounting holes, and the second limiting block is detachably mounted in different mounting holes so as to adjust the distance between the first limiting block and the second limiting block and further adjust the swinging angle of the spindle seat.

5. A multiple-rotation high-rigidity vertical grinding machine according to claim 1 or 2, characterized in that: an inductive switch is arranged at the position of the Z-axis sliding seat below the main shaft seat, and the inductive switch and the rotary oil cylinder are respectively and electrically connected with a peripheral control system.

6. The multiple-rotation high-rigidity vertical grinding machine according to claim 1, wherein: the grinding wheel is connected with a tool handle which is detachably clamped on the grinding electric spindle, and the grinding wheel and the tool handle form a grinding wheel set;

the grinding wheel warehouse comprises a supporting turntable and a C-axis motor, wherein the supporting turntable and the C-axis motor are vertically arranged, the supporting turntable is driven to rotate, a plurality of elastic clamping jaws are arranged on the periphery of the supporting turntable, one elastic clamping jaw is vacant, other elastic clamping jaws are provided with a grinding wheel set for replacing a grinding electric spindle, and a Y-axis feeding mechanism and a Z-axis feeding mechanism can move the grinding mechanism to an X-axis workpiece positioning turntable, a sand repairing mechanism and the grinding wheel warehouse.

7. The multiple-rotation high-rigidity vertical grinding machine according to claim 6, wherein: every elasticity jack catch is equipped with first bullet arm and second and plays the arm, but first bullet arm and second play the arm and be formed with the centre gripping mouth that elasticity opened and close, and the lateral wall of centre gripping mouth is equipped with inlays the arch, and the handle of a knife upper end is equipped with inlays the recess to make behind the handle of a knife embedding centre gripping mouth, the arch of inlaying of handle of a knife inserts and inlays in the recess.

8. The multiple-rotation high-rigidity vertical grinding machine according to claim 1, wherein: the overturning driving mechanism comprises a gear, a rack and an overturning oil cylinder, the gear is fixedly connected with a rotating shaft of the overturning seat, the gear and the rack are meshed and connected, and a telescopic rod of the overturning oil cylinder is connected with the rack so as to drive the rack to reciprocate.

9. The multiple-rotation high-rigidity vertical grinding machine according to claim 1, wherein: the Z-axis driving module comprises a Z-axis supporting seat, a Z-axis guide rail, a Z-axis lead screw nut and a Z-axis driving motor, the Z-axis lead screw and the Z-axis guide rail are arranged on the Z-axis supporting seat in parallel along the longitudinal direction, the Z-axis lead screw nut is in threaded fit with the Z-axis lead screw, and the Z-axis lead screw is connected with an output shaft of the Z-axis driving motor; the back of the Z-axis sliding plate is fixedly connected with a Z-axis screw rod nut and is in sliding fit with the Z-axis guide rail.

10. The multiple-rotation high-rigidity vertical grinding machine according to claim 9, wherein: y axle feed mechanism includes Y axle supporting seat, Y axle guide rail, Y axle lead screw, Y axle screw nut and Y axle driving motor, and Y axle supporting seat is fixed in the lathe bed, and Y axle guide rail and Y axle lead screw are arranged side by side along transversal arrangement in Y axle supporting seat mutually, and Y axle screw nut and Y axle screw thread fit, Y axle screw connection Y axle driving motor's output shaft, the back fixed connection Y axle screw nut of Z axle supporting seat, and sliding fit Y axle guide rail.

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