WO2022205548A1

WO2022205548A1 - Cylindrical grinding machine

Info

Publication number: WO2022205548A1
Application number: PCT/CN2021/089928
Authority: WO
Inventors: 陈军闯; 曹宇中; 许少军; 杜海涛; 朱树平; 金尧; 梅志毅; 马素芳
Original assignee: 华辰精密装备（昆山）股份有限公司
Priority date: 2021-03-29
Filing date: 2021-04-26
Publication date: 2022-10-06
Also published as: EP4088861A8; CN113001274A; EP4088861A1

Abstract

The present invention provides a cylindrical grinding machine, comprising: a frame, a machine body, a working table, a Z-axis guide rail assembly, an X-axis guide rail assembly, a B-axis rotary assembly, and a grinding frame. The frame is fixedly mounted on the ground; the frame is connected to the machine body by means of the X-axis guide rail assembly, the working table is connected to the machine body by means of the Z-axis guide rail assembly, and the grinding frame is connected to the working table by means of the B-axis rotary assembly. According to the present invention, the Z-axis guide rail assembly, the X-axis guide rail assembly, and the B-axis rotary assembly are provided, the Z-axis guide rail assembly is configured to be a negative-pressure adsorption static pressure support structure, the X-axis guide rail assembly is configured to be an air-floating unloading structure, and the B-axis rotary assembly is configured to be a direct-drive structure, thereby avoiding the problem that the position of each assembly cannot be adjusted quickly and efficiently.

Description

A cylindrical grinder

technical field

The present disclosure relates to the field of machining, and in particular, to a cylindrical grinder.

Background technique

When the cylindrical grinder performs operations such as cylindrical grinding, internal hole grinding, non-circular grinding, and thread grinding, it is necessary to control the X-axis, Z-axis and B-axis of the cylindrical grinder to achieve accurate machining. At this stage, most cylindrical grinders use screw locking, and the movement uses the movement of the rack and pinion. When moving, you need to use a wrench to rotate the gear, and then drive one component in the direction of the other component through the meshing of the gear and the rack. Move, move to the desired position, and then remove the locking screw to ensure that one component is clamped to the other.

This structure makes the movement of each component have great labor intensity, and the operation is complicated and cumbersome. When installing the workpiece, it takes a lot of installation man-hours, which greatly reduces the use efficiency. , which makes the overall component structure relatively large and high in cost.

SUMMARY OF THE INVENTION

In order to solve at least one of the above technical problems, the present disclosure provides a cylindrical grinding machine.

According to one aspect of the present disclosure, a cylindrical grinding machine includes: a frame, a bed, a worktable, a Z-axis guide rail assembly, an X-axis guide rail assembly, a B-axis rotary assembly, and a grinding frame, the frame being fixedly installed on the ground The frame is connected to the bed through the X-axis guide rail assembly, the worktable is connected to the bed through the Z-axis guide rail assembly, and the grinding frame is connected to the machine body through the B-axis rotation assembly. The workbench is connected.

Specifically, the B-axis rotary assembly includes a turntable, a box base, a torque motor and a locking module, the turntable is rotatably connected to the box base through a turntable bearing, and the torque motor is arranged on the turntable and the between the box seats, and the stator and rotor of the torque motor are fixedly connected to the box seat and the turntable, respectively, and the relative position between the turntable and the box seat is determined by the locking module. Fixed, the box base is fixedly connected to the worktable, and the grinding frame is fixedly connected to the turntable.

Preferably, the turntable is of a round table structure, a circular installation groove adapted to the turntable is provided inside the box base, the turntable is arranged in the circular installation groove, and the turntable and the The circular installation grooves are coaxially arranged, and the upper end of the outer side surface of the turntable is rotatably connected to the upper end of the inner side surface of the circular installation groove through the turntable bearing;

The torque motor is coaxially arranged with the turntable and the circular installation slot, the stator of the torque motor is fixedly connected to the lower end of the circular installation slot, and the rotor of the torque motor is fixed to the lower end of the turntable connect.

Preferably, the locking module includes a locking ring, a hydraulic disc and a disc spring, the hydraulic disc is arranged in the circular installation groove, and the lower side of the hydraulic disc and the bottom surface of the circular installation groove Fixed connection, the upper side of the locking ring is fixedly connected with the lower end surface of the circular table, the locking ring is arranged corresponding to the hydraulic disc, and the lower side of the locking ring is connected to the upper side of the hydraulic disc A gap is provided between, and the height of the gap is not greater than the maximum ascending stroke of the hydraulic disc;

A plurality of disc springs are evenly and fixedly arranged on the upper side of the hydraulic disc, the lower end of the disc spring is fixedly connected with the hydraulic disc, and the distance between the upper end surface of the disc spring and the lower side of the locking ring is less than the gap.

Specifically, the X-axis guide rail assembly includes an air flotation unloading assembly and a moving assembly, the air flotation unloading assembly is fixedly disposed on the bed, the moving assembly is disposed on the frame, and the moving assembly The assembly is located between the bed and the frame, and the bed and the frame are movably connected through the moving assembly;

The air flotation unloading assembly includes a gas pressure chamber, a ventilation pipeline, an air inlet nozzle, an air pipe and an air supply system, the air inlet nozzle is communicated with the air outlet end of the air supply system through the air pipe, and a plurality of the The gas pressure chamber is arranged on the lower side of the bed, and the gas pressure chamber communicates with the air inlet through the ventilation pipeline.

Preferably, the moving assembly includes a guide rail assembly and a locking assembly, and the bed and the frame are fixedly connected through the locking assembly;

The guide rail assembly includes guide rail grooves and guide rails, the guide rails are fixedly arranged on the upper side of the frame, the guide rail grooves are arranged on the lower side of the bed, and the guide rail grooves are correspondingly arranged with the guide rails, The upper side surface of the guide rail groove is fitted with the upper side surface of the guide rail, and a vertical lift margin is provided between the upper side surface of the guide rail groove and the upper side surface of the guide rail;

The locking assembly includes a locking block, a locking screw rod and an adjustment handle, the upper side of the guide rail is provided with a locking groove adapted to the locking block, and the upper end of the locking block is provided with a locking groove corresponding to the locking block. The screw hole for the locking screw, the lower end of the locking block is arranged in the locking groove, the lower part of the bed is arranged with a cylindrical cavity, and the locking screw is arranged in the cylindrical cavity , and the outer side of the locking screw is rotatably connected to the inner side of the cylindrical cavity, the inner end of the locking screw is movably connected to the locking block through threads, and the outer side of the locking screw is movably connected to the locking block. The end is arranged on the outside of the bed and is fixedly connected with the adjusting handle.

Specifically, the Z-axis guide rail assembly includes a guide rail body and a static pressure support assembly, the guide rail body is fixedly arranged on the upper side of the bed, and the lower side of the worktable is provided with a guide rail adapted to the guide rail body groove;

The static pressure support assembly includes a side guide rail static pressure oil chamber group, a main bearing static pressure oil chamber and an oil supply system, the side guide rail static pressure oil chamber group is arranged on the side of the guide rail groove, and the side rail The static pressure oil chamber group of the guide rail is correspondingly arranged on the side of the guide rail body, and a plurality of the main bearing static pressure oil chambers are arranged on the bottom surface of the guide rail groove, and the main bearing static pressure oil chamber is connected to the guide rail. The top surface of the main body is correspondingly arranged, and both the side guide rail static pressure oil chamber group and the main bearing static pressure oil chamber are communicated with the oil outlet end of the oil supply system through a static pressure oil passage.

Specifically, the Z-axis guide rail assembly is also configured with a negative pressure adsorption assembly, and the negative pressure adsorption assembly utilizes negative pressure to adsorb the guide rail body to stabilize the relative movement between the worktable and the guide rail body;

The negative pressure adsorption assembly includes a negative pressure ring groove and a negative pressure system, the negative pressure ring groove is fixedly arranged on the bottom surface of the guide rail groove, and the negative pressure ring groove communicates with the negative pressure of the negative pressure system through an air circuit. The negative pressure ring groove is arranged between the side guide rail static pressure oil chamber group and the main bearing static pressure oil chamber, and the negative pressure ring groove close to the side of the guide rail groove is arranged in the The main carrier carries the periphery of the hydrostatic oil chamber.

Further, the cylindrical grinder further includes a headstock, a tailstock and an adjustment device, the headstock and the tailstock are movably connected to the bed through the adjustment device, and the adjustment device includes a fixed assembly and an adjustment device an assembly, the fixing assembly is fixedly connected to the lower side of the headstock/tail frame and the upper side of the bed, the adjusting assembly is arranged in the fixing assembly, and the adjusting assembly is connected to the Fixed components slide for a snug fit.

Specifically, the fixing assembly includes a left fixing guide plate and a right fixing guide plate, the left fixing guide plate and the right fixing guide plate are both vertically arranged, and the left fixing guide plate and the The right fixed guide plate is arranged between the head frame/tail frame and the bed, and the left fixed guide plate is fixed to the lower side of the head frame/tail frame/the upper side of the bed connection, the right fixed guide plate is fixedly connected with the upper side of the bed/the head frame/the lower side of the tail frame;

The adjustment assembly includes a wedge assembly and an adjustment assembly, the wedge assembly is arranged between the left fixed guide plate and the right fixed guide plate, and the left side/right side of the wedge assembly is an inclined surface , the left side of the wedge assembly is slidably attached to the right side of the left fixed guide plate, and the right side of the wedge assembly is slidably attached to the left side of the right fixed guide plate , the adjustment assembly is fixedly connected with one end of the wedge assembly;

The wedge-shaped assembly includes a wedge-shaped block and a guide rail module, the left and right sides of the wedge-shaped block are inclined surfaces, and the inner sides of the two guide rail modules are respectively connected with the left and right sides of the wedge-shaped block. The guide rail module and the wedge-shaped block are fixedly connected, and the outer sides of the two guide rail modules are respectively slidably fitted with the left fixed guide plate and the right fixed guide plate.

According to at least one embodiment of the present disclosure, the present disclosure provides a Z-axis guide rail assembly, an X-axis guide rail assembly, and a B-axis rotation assembly, and by setting the Z-axis guide rail assembly into a negative pressure adsorption static pressure support structure, the X-axis guide rail assembly is set It becomes an air-floating unloading structure, and the B-axis rotary assembly is set to a direct-drive structure, thereby avoiding the problem that the position of each assembly cannot be adjusted quickly and efficiently.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure, are included to provide a further understanding of the disclosure, and are incorporated in and constitute the present specification part of the manual.

FIG. 1 is a schematic structural diagram of the B-axis rotary assembly according to the present disclosure.

2 is a bottom view of an X-axis rail assembly according to the present disclosure.

FIG. 3 is a schematic structural diagram of the locking module according to the present disclosure.

FIG. 4 is a schematic structural diagram of the Z-axis guide rail assembly according to the present disclosure.

FIG. 5 is a partially exploded schematic view of FIG. 4 .

6 is a cross-sectional view of the side rail hydrostatic oil chamber set according to the present disclosure.

7 is a cross-sectional view of the adjustment device according to the present disclosure.

Fig. 8 is a longitudinal sectional view of the adjusting device according to the present disclosure.

9 is a front view of a cylindrical grinder according to the present disclosure.

10 is a rear view of a cylindrical grinder according to the present disclosure.

11 is a side view of a cylindrical grinder according to the present disclosure.

Reference numerals: 1-bed, 2-headstock, 3-tailstock, 4-table, 5-B-axis rotary assembly, 6-grinding frame, 11-turntable, 12-turntable bearing, 13-torque motor, 14-Box seat, 15-Angle encoder, 16-Lock ring, 17-Hydraulic disc, 21-B-axis rotary assembly, 23-Gas pressure chamber, 25-Inlet nozzle, 26-Guide groove, 27-Lock Tightening screw, 28-adjustment handle, 29-locking block, 210-guide rail, 31-guideway groove, 32-side guideway static pressure oil chamber group, 33-main load static pressure oil chamber, 34-negative pressure ring groove, 35-Hydrostatic oil chamber of lateral guide rail, 36-Hydrostatic oil circuit, 41-Reset assembly, 43-Wedge block, 45-Adjustment assembly, 46-Left fixed guide plate, 47-Guide rail module, 49-Right fixed Guide plate, 410-headstock/tailstock, 411-bed.

Detailed ways

The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, but not to limit the present disclosure. In addition, it should be noted that, for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

It should be noted that the embodiments of the present disclosure and the features of the embodiments may be combined with each other unless there is conflict. The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Fig. 9, Fig. 10, Fig. 11, a cylindrical grinding machine includes a frame, a bed 1, a worktable 4, a Z-axis guide rail assembly, an X-axis guide rail assembly, a B-axis rotary assembly 5 and a grinding frame 6. The The frame is fixedly installed on the ground, the frame is connected to the bed 1 through the X-axis guide rail assembly, the worktable 4 is connected to the machine bed 1 through the Z-axis guide rail assembly, and the grinding The frame 6 is connected to the worktable 4 through the B-axis swivel assembly 5 .

The bed 1 adopts an integral T-shaped structure, and all the guide surfaces are processed and formed at one time, with high static, high dynamic stiffness and high precision. The bed 1 adopts a three-point support method without special installation foundation. The shaft guide assembly makes the grinding machine have good shock absorption performance and can achieve extremely small incremental feed without climbing.

And by arranging the headstock 2 and the tailstock 3, the objects to be processed can be clamped at the processing position of the grinding frame, thereby realizing the processing of the grinding machine.

In addition, the

symbols

1, 4, 6, etc. in the figures may overlap with the names of the symbols in the other figures. For the convenience of description and understanding, the symbols in the figures are the main ones.

The B-axis rotary assembly includes a turntable 11 , a box base 14 , a torque motor 13 and a locking module. The turntable 11 is rotatably connected to the box base 14 through a turntable bearing 12 , and the torque motor 13 is arranged between the turntable 11 and the box base 14 . , and the stator and rotor of the torque motor 13 are fixedly connected to the box base 14 and the turntable 11 respectively, the relative position between the turntable 11 and the box base 14 is fixed by the locking assembly, and the box base 14 is fixedly connected to the table 4, The grinding frame 6 is fixedly connected with the turntable 4 .

The turntable bearing 12 is arranged at the upper part of the turntable 11/box base 14, the torque motor 13 is arranged in the middle of the turntable 11/box base 14, and the locking module is arranged at the lower part of the turntable 11/box base 14.

The rotatable connection between the turntable 11 and the box base 14 is realized by the turntable bearing 12 , and the turntable 11 is driven to rotate by the torque motor 13 .

The torque motor 13 has the characteristics of low speed, high torque, strong overload capability, fast response, and small torque fluctuation. The transmission error is eliminated, and the running accuracy of the system is improved.

The high-precision turntable bearing 12 is used to ensure high rotation accuracy while making the structure of the turntable 11 simple, solving the technical problems of high machining requirements, difficult assembly, complex hydraulic system and high failure rate caused by the use of traditional hydrostatic bearings. However, the installation of the high-precision turntable bearing 12 has high requirements on the machining accuracy of the bearing installation surface, and there are problems such as high requirements on the manufacturability of the bearing assembly during the installation process.

The turntable 11 is a round table structure. The box base 14 is provided with a circular installation groove that is adapted to the turntable 11. The turntable 11 is arranged in the circular installation groove, and the turntable 11 and the circular installation groove are coaxially arranged. The upper end of the side surface is rotatably connected with the upper end of the inner side surface of the circular installation groove through the turntable bearing 12;

The torque motor 13 is coaxially arranged with the turntable 11 and the circular installation slot, the stator of the torque motor 13 is fixedly connected to the lower end of the circular installation slot, and the rotor of the torque motor 13 is fixedly connected to the lower end of the turntable 11 .

The torque motor 13 is a special motor with a large number of poles, which can continue to run even when the motor is locked at low speed (that is, the rotor cannot rotate) without causing damage to the motor. In this working mode, the motor can provide a stable torque to the load (hence the name torque motor). Torque motors can also provide torque in the opposite direction to the running direction (braking torque). The shaft of the torque motor does not output power with constant power but with constant torque.

The locking module includes a locking ring 16, a hydraulic disc 17 and a disc spring. The hydraulic disc 17 is arranged in the circular installation groove, and the lower side of the hydraulic disc 17 is fixedly connected with the bottom surface of the circular installation groove. The side surface is fixedly connected with the lower end surface of the round table, the locking ring 16 is arranged correspondingly with the hydraulic disc 17, a gap is set between the lower side of the locking ring 16 and the upper side surface of the hydraulic disc 17, and the height of the gap is not greater than the maximum height of the hydraulic disc 17. ascent;

A plurality of disc springs are evenly fixed on the upper side of the hydraulic disc 17 , the lower ends of the disc springs are fixedly connected to the hydraulic disc 17 , and the distance between the upper end surface of the disc springs and the lower side of the locking ring 16 is smaller than the gap.

When the turntable 11 is rotated to the required position under the drive of the torque motor 13, and the turntable 11 needs to be locked so as not to rotate, hydraulic pressure is supplied to the hydraulic plate 17 through the hydraulic system. Move up and fit with the locking ring 16 to ensure that the angle of the turntable 11 will not change during long-term work, to ensure the stability of the position of the turntable 11, the pressure drops after the work is completed, and the hydraulic disc 17 and the locking ring 16 are separated to ensure Rotation of the turntable 11 .

At the same time, in order to speed up the separation speed of the hydraulic disc 17 and the locking ring 16, the disc spring 8 is installed on the hydraulic disc 17, and the hydraulic disc 17 and the locking ring 16 are quickly separated by the elastic force of the disc spring 8 to ensure the freedom of the turntable 11. turn.

In addition, the angle encoder 15 is also included. The angle encoder 15 is arranged coaxially with the turntable 11 and the circular installation slot, and the angle encoder 15 is fixedly connected with the turntable 11 and the circular installation slot. The data output end of the angle encoder 15 It is electrically connected to the data input end of the torque motor 13, a cavity is provided between the lower end surface of the turntable 11 and the bottom surface of the circular installation slot, and the angle encoder 15 is fixedly arranged in the cavity.

The angle encoder 15 is used to control the angular position of the rotation of the turntable 1. The HEIDENHAIN high-precision angle encoder 15 is used, and the conventional gear ring encoder is omitted. High accuracy, up to ±2.5″, makes the system have extremely high angular position accuracy.

The X-axis guide rail assembly includes an air flotation unloading assembly and a moving assembly. The air flotation unloading assembly is fixed on the bed 1, the moving assembly is disposed on the frame, and the moving assembly is located between the frame and the bed 1. The frame and the bed 1 are movably connected through the moving assembly;

When the bed 1 needs to be moved, an upward supporting force is generated on the bed 1 through the air flotation unloading component, so that a gap is formed between the bed 1 and the frame, and the friction force between the bed 1 and the frame is reduced , so that the bed 1 and the frame can be flexibly moved through the moving assembly.

When no movement is required, the working state of the air flotation unloading assembly is canceled, the frame is in contact with the bed 1, and the bed 1 and the frame are locked by the moving assembly to avoid movement.

The air flotation unloading assembly includes a gas pressure chamber 23, a ventilation pipeline, an air inlet nozzle 25, an air pipe and an air supply system. The air inlet nozzle 25 is communicated with the air outlet of the air supply system through the air pipe, and a plurality of gas pressure chambers 23 are arranged in the bed. On the lower side of the body 1, the gas pressure chamber 23 is communicated with the air intake nozzle 25 through a ventilation pipeline.

The gas pressure chamber 23 is a shallow groove, and a plurality of gas pressure chambers 23 are distributed on the upper side of the guide rail groove 26. The areas of the plurality of gas pressure chambers 23 are equal, and the depths of the plurality of gas pressure chambers 23 are the same. It is arranged in the middle of the gas pressure chamber 23, the air inlet of the ventilation line is connected with the air inlet nozzle 25, the air inlet nozzle 25 is arranged on the side of the bed 1, the ventilation line is arranged inside the bed 1, and the air inlet of the gas pressure chamber 23 is connected. The opening surface is attached to the upper side surface of the guide rail 210 .

When the bed 1 needs to be moved, high-pressure gas is pumped into the trachea and the ventilation line through the air supply system, and the high-pressure gas enters the gas pressure chamber 23. According to F=P×S (F is the upper buoyancy of the bed 1, and P is The pressure of the high-pressure gas introduced, S is the total effective bearing area of the multiple gas pressure chambers 23), by adjusting the pressure P of the high-pressure gas, the bed 1 can be floated by 0.01mm-0.03mm, so that the guide rail 210 and the guide rail groove 26 can slide easily.

The gas supply system can be either a gas pump or a pressure bottle that can provide high pressure gas. The gas pressure chamber 23 can be a circular shallow groove as shown in the figure, or a square shallow groove.

The moving assembly includes a guide rail assembly and a locking assembly, and the bed 1 and the frame are fixedly connected through the locking assembly;

The guide rail assembly includes a guide rail slot 26 and a guide rail 210. The guide rail 210 is fixedly arranged on the upper side of the frame, the guide rail slot 26 is arranged on the lower side of the bed 1, and the guide rail slot 26 is arranged corresponding to the guide rail 210. The upper sides of the guide rails 210 are fitted together, and a vertical lift margin is provided between the upper sides of the guide rail grooves 26 and the upper sides of the guide rails 210;

The guide rail 210 is arranged in the guide rail groove 26 and can produce relative sliding. When the movement between the bed 1 and the frame is required, an upward lift force is generated on the bed 1 through the air flotation load assembly, so that the bed 1 floats up by 0.01 mm-0.03mm, so that there is a gap between the upper side of the guide rail groove 26 and the upper side of the guide rail 210, thereby reducing the friction components seen by the guide rail 210, so that the relative displacement between the bed 1 and the frame can be easily generated.

The locking assembly includes a locking block 29, a locking screw 27 and an adjusting handle 28. The upper side of the guide rail 210 is provided with a locking groove adapted to the locking block 29, and the upper end of the locking block 29 is provided with the locking screw 27. The lower end of the locking block 29 is set in the locking groove, the lower part of the bed 1 is provided with a cylindrical cavity, the locking screw 27 is set in the cylindrical cavity, and the outer side of the locking screw 27 is connected to the cylindrical cavity. The inner side of the cylindrical cavity is rotatably connected, the inner end of the locking screw 27 is movably connected with the locking block 29 through threads, and the outer end of the locking screw 27 is arranged outside the bed 1 and is fixedly connected with the adjusting handle 28 .

The cylindrical cavity is set horizontally, the projection of the central axis of the cylindrical cavity on the horizontal plane is perpendicular to the guide rail 210, the central axis of the locking groove is parallel to the guide rail 210, and a horizontal translation is provided between the locking block 29 and the locking groove margin and vertical lift margin.

The bed 1 is locked by the engagement between the locking block 29 and the locking groove. As shown in Figure 3, the locking block 29 can be a special-shaped structure, which can be a wedge shape as shown in the figure, or a rectangle. When the locking block 29 is wedge-shaped, the inclination direction of the locking block 29 and the locking groove is not fixed, and it is only necessary to ensure that the lower end of the locking block 29 is larger than the upper end of the locking block 29, and the locking operation can be easily realized. It can also effectively prevent it from falling.

When locking is required, the adjusting handle 28 is rotated, and a lead screw structure is formed between the locking block 29 and the locking screw 27, the locking screw 27 is driven to rotate by the adjusting handle 28, and the locking block 29 is driven by the rotation of the locking screw 27. Moving left and right (left and right in the direction of the paper as shown in Figure 1), the locking block 29 is engaged and disengaged from the locking groove through the left and right movement of the locking block 29. When the locking block 29 is engaged with the locking groove, the bed The bed 1 is locked on the rack; when the locking block 29 is disengaged from the locking groove, the bed 1 can move on the rack along the guide rails 210 .

The Z-axis guide rail assembly includes a guide rail body and a static pressure support assembly, the guide rail body is fixedly arranged on the upper side of the bed, and the lower side of the worktable is provided with a guide rail groove 31 adapted to the guide rail body;

The static pressure support assembly includes a side guide rail static pressure oil chamber group 32, a main bearing static pressure oil chamber 33 and an oil supply system. The side guide rail static pressure oil chamber group 32 is arranged on the side of the guide rail groove 31, and the side guide rail static pressure The oil cavity group 32 is arranged corresponding to the side surface of the guide rail body, a plurality of main bearing static pressure oil cavities 33 are arranged on the bottom surface of the guide rail groove 31, and the main bearing static pressure oil cavity 33 is arranged correspondingly to the top surface of the guide rail body, and the lateral The guide rail static pressure oil chamber group 32 and the main bearing static pressure oil chamber 33 are both communicated with the oil outlet end of the oil supply system through the static pressure oil passage 36 .

The lateral guide rail static pressure oil chamber group 32 is arranged on both sides of the guide rail groove 31 to provide better support and positioning for the workbench, and a bearing oil film can also be formed between the guide rail groove 31 and the side of the guide rail body to avoid the guide rail groove. The side of the 31 is in direct contact with the side of the guide rail body, making it in a state of pure liquid friction, increasing stability, reducing the direction finding error of the worktable running, and improving the motion stability of the bed and the machining accuracy of the workpiece.

The oil supply system can be the existing hydraulic oil pumping system, and the output pressure to the side guide rail static pressure oil chamber group 32 and the main bearing static pressure oil chamber 33 can be controlled by adjusting the oil supply system, so that the oil pressure and the workbench can be adjusted. An effective balance is formed between the gravity of the guide rail groove 31 and the contact surface of the guide rail body, which can form a bearing oil film between the guide rail groove 31 and the guide rail body contact surface, and can effectively control the relative position of the worktable and the bed.

The side guide rail static pressure oil chamber group 32 includes a plurality of side guide rail static pressure oil chambers 35 , and the resultant force of the plurality of side guide rail static pressure oil chambers 35 on the side surface of the guide rail body is zero.

By setting the position of the static pressure oil cavity 35 of the side guide rail and controlling the area of each side guide rail static pressure oil cavity 35, the resultant force on the side surface of the guide rail body is zero, so that the shaking of the worktable on the guide rail body can be avoided. Increase stability.

The Z-axis guide rail assembly is also equipped with a negative pressure adsorption assembly, which uses negative pressure to adsorb the guide rail body to stabilize the relative movement between the worktable and the guide rail body;

The negative pressure adsorption assembly includes a negative pressure ring groove 34 and a negative pressure system. The negative pressure ring groove 34 is fixedly arranged on the bottom surface of the guide rail groove 31. The negative pressure ring groove 34 is communicated with the negative pressure end of the negative pressure system through an air circuit. The groove 34 is arranged between the side guide rail static pressure oil chamber group 32 and the main bearing static pressure oil chamber 33 , and the negative pressure ring groove 34 close to the side of the guide rail groove 31 is arranged on the periphery of the main bearing static pressure oil chamber 33 .

By adding a negative pressure ring groove 34 on the bottom surface of the guide rail groove 31, and through the negative pressure system to make the negative pressure ring groove 34 in a negative pressure state, the load bearing oil film thickness and stiffness required by the open hydrostatic guide rail are ensured, and the static pressure is solved. The drift of the high-speed movement of the guide rail and the creeping phenomenon during low-speed movement improve the movement stability of the machine tool and the machining accuracy of the workpiece.

The number of the negative pressure ring grooves 34 is determined according to the number of the guide rail grooves 31. Assuming that the number of the guide rail grooves 31 is 2, as shown in the figure, in order to improve the stability of the machine tool, the negative pressure ring grooves 34 are set to two Parts, respectively located in the upper and lower parts shown in the figure, can achieve negative pressure adsorption without affecting the work of the static pressure support assembly.

The cylindrical grinding machine also includes a headstock 2, a tailstock 3 and an adjusting device. The headstock 2 and the tailstock 3 are movably connected to the bed 411 (the same object as the mark 1 in Figures 9, 10, and 11) through the adjusting device. The adjusting device includes a fixing component and an adjusting component. The fixing component is fixedly connected to the lower side of the headstock 2/tailstock 3 and the upper side of the bed 411.

The fixed assembly includes a left fixed guide plate 46 and a right fixed guide plate 49. Both the left fixed guide plate 46 and the right fixed guide plate 49 are vertically arranged, and the left fixed guide plate 46 and the right fixed guide plate 49 are arranged Between the head/tail frame 410 and the bed 411, the left fixed guide plate 46 is fixedly connected to the lower side of the head/tail frame 410/the upper side of the bed 411, and the right fixed guide 49 is connected to the bed 411 The upper side/headstock/tailstock 410 is fixedly connected to the lower side;

The fixed assembly is composed of at least two fixed guide plates, the left and right of which are described in the left and right directions shown in Figure 7, and in order for the adjustment assembly to drive the fixed guide plate to move, it is necessary to ensure that the left fixed guide plate 46 and the right fixed guide plate 46 are fixed. The guide plate 49 is not fixedly connected with the head frame/tail frame 410 or the bed frame 411 at the same time;

For example: the left fixed guide plate 46 is fixedly connected to the lower side of the head frame/tail frame 410, and the right fixed guide plate 49 is fixedly connected to the upper side of the bed 411, then the left fixed guide plate 46 can be fixed by adjusting the assembly. The distance between it and the right fixed guide plate 49 is adjusted, thereby realizing the movement of the headstock/tailstock 410.

The adjustment assembly includes a wedge assembly and an adjustment assembly 45. The wedge assembly is arranged between the left fixed guide plate 46 and the right fixed guide plate 49. The left side/right side of the wedge assembly is an inclined surface, and the left side of the wedge assembly It can be slidably attached to the right side of the left fixed guide plate 46, the right side of the wedge assembly can be slidably attached to the left side of the right fixed guide plate 49, and the adjustment assembly 45 is fixedly connected to one end of the wedge assembly;

Set the headstock/tailstock 410 to move along the X-axis direction, then the wedge-shaped assembly can slide in the Z-direction in the fixed assembly, and the adjustment assembly 45 is arranged along the Z-axis;

As shown in Figure 7, the X-axis direction is the horizontal direction in the figure, and the Z-axis direction is the vertical direction in the figure. The side can also be set on the right side of the wedge-shaped component, and can be set as the lower part of the wedge-shaped component (the position in Figure 7) with a width smaller than the upper part of the wedge-shaped component (the position in Figure 7), or it can be set as the wedge-shaped component. The width of the upper part (position in Figure 7) is smaller than the lower part of the wedge assembly (position in Figure 7).

Example: The inclined surface is provided on the right side of the wedge assembly, and the width of the lower part of the wedge assembly (position in Figure 7) is smaller than the upper part of the wedge assembly (position in Figure 7).

By controlling the downward movement of the wedge assembly (the position in FIG. 7 ), the left fixed guide plate 46 and the right fixed guide plate 49 on both sides of the wedge assembly can be pushed to separate, that is, the left fixed guide plate 46 and the right fixed guide plate 49 The distance between the plates 49 is increased, enabling adjustment of the position of the headstock/tailstock 410 .

By controlling the wedge assembly to move upward (the position in FIG. 7 ), the left fixed guide plate 46 and the right fixed guide plate 49 on both sides of the wedge assembly can be pushed closer, that is, the left fixed guide plate 46 and the right fixed guide plate The distance between 49 is reduced, enabling adjustment of the position of the headstock/tailstock 410.

The wedge-shaped assembly includes a wedge-shaped block 43 and a guide rail module 47. The left side/right side of the wedge-shaped block 43 is an inclined surface, and the inner sides of the two guide rail modules 47 are respectively fitted with the left and right sides of the wedge-shaped block 43. And the guide rail module 47 and the wedge block 43 are fixedly connected, and the outer sides of the two guide rail modules 47 are respectively slidably attached to the left fixed guide plate 46 and the right fixed guide plate 49 .

By setting the guide rail module 47, the positional relationship between the wedge-shaped block 43 and the fixed guide plate can be controlled, so that the wedge-shaped block 43 and the fixed guide plate can only move relatively in the Z-axis direction, not in the Z-axis (the vertical direction in FIG. 2 ). straight direction) to move. The guide rail module 47 may be a slidable guide rail.

The side busbar adjustment device further includes reset assemblies 41 , which are disposed at the left and right ends of the machining bed and are fixedly connected to the headstock/tailstock 410 and/or the bed 411 .

The reset assembly 41 includes at least two spring plates, the spring plates are respectively disposed on the left and right ends of the machine tool, and the spring plates are fixedly connected with the headstock/tailstock 410 and/or the bed 411 .

The reset assembly 41 may be a spring plate, or a compression spring, a pneumatic telescopic rod, or other flexible device. A reset force is applied to the headstock/tailstock 410 through the reset assembly 41. When the headstock/tailstock 410 needs to be reset, the position of the wedge assembly is changed, and the headstock/tailstock 410 is reset under the force of the reset assembly 41. .

In addition, the head frame can also be slidably connected to the bed 411 by adopting a structure similar to the X-axis guide rail assembly.

In the description of this specification, references to the terms "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples", etc. are intended to be combined with the description of the embodiment/mode A particular feature, structure, material, or characteristic described by way of example or example is included in at least one embodiment/mode or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment/mode or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments/means or examples. Furthermore, those skilled in the art may combine and combine the different embodiments/modes or examples described in this specification and the features of the different embodiments/modes or examples without conflicting each other.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

Those skilled in the art should understand that the above-mentioned embodiments are only for clearly illustrating the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications may also be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

A cylindrical grinding machine is characterized in that it comprises: a frame, a bed, a workbench, a Z-axis guide rail assembly, an X-axis guide rail assembly, a B-axis rotary assembly and a grinding frame, wherein the frame is fixedly installed on the ground, so that the The frame is connected with the bed through the X-axis guide rail assembly, the worktable is connected with the bed through the Z-axis guide rail assembly, and the grinding frame is connected with the worktable through the B-axis rotation assembly station connection.
The cylindrical grinding machine according to claim 1, wherein the B-axis rotary assembly comprises a turntable, a box seat, a torque motor and a locking module, and the turntable is connected to the box seat through a turntable bearing. Rotationally connected, the torque motor is arranged between the turntable and the box base, and the stator and rotor of the torque motor are fixedly connected to the box base and the turntable respectively, and the turntable and the The relative positions between the box seats are fixed by the locking module, the box seats are fixedly connected with the worktable, and the grinding frame is fixedly connected with the turntable.
The cylindrical grinding machine according to claim 2, characterized in that the turntable is a round table structure, a circular mounting groove adapted to the turntable is provided inside the box base, and the turntable is arranged on the inside the circular installation groove, and the turntable is coaxially arranged with the circular installation groove, and the upper end of the outer side of the turntable is rotatably connected to the upper end of the inner side of the circular installation groove through the turntable bearing ;

The torque motor is coaxially arranged with the turntable and the circular installation slot, the stator of the torque motor is fixedly connected to the lower end of the circular installation slot, and the rotor of the torque motor is fixed to the lower end of the turntable connect.
The cylindrical grinding machine according to claim 3, wherein the locking module comprises a locking ring, a hydraulic disc and a disc spring, the hydraulic disc is arranged in the circular installation groove, and the The lower side surface of the hydraulic disc is fixedly connected with the bottom surface of the circular installation groove, the upper side surface of the locking ring is fixedly connected with the lower end surface of the circular platform, the locking ring is arranged correspondingly to the hydraulic disc, and the A gap is set between the lower side surface of the locking ring and the upper side surface of the hydraulic disc, and the height of the clearance is not greater than the maximum ascending stroke of the hydraulic disc;

A plurality of disc springs are evenly and fixedly arranged on the upper side of the hydraulic disc, the lower end of the disc spring is fixedly connected with the hydraulic disc, and the distance between the upper end surface of the disc spring and the lower side of the locking ring is less than the gap.
The cylindrical grinding machine according to claim 2, wherein the X-axis guide rail assembly comprises an air-float unloading assembly and a moving assembly, the air-float unloading assembly is fixedly arranged on the bed, and the a moving assembly is arranged on the frame, and the moving assembly is located between the bed and the frame, and the bed and the frame are movably connected through the moving assembly;

The air flotation unloading assembly includes a gas pressure chamber, a ventilation pipeline, an air inlet nozzle, an air pipe and an air supply system, the air inlet nozzle is communicated with the air outlet end of the air supply system through the air pipe, and a plurality of the The gas pressure chamber is arranged on the lower side of the bed, and the gas pressure chamber communicates with the air inlet through the ventilation pipeline.
The cylindrical grinding machine according to claim 5, wherein the moving component comprises a guide rail component and a locking component, and the bed and the frame are fixedly connected by the locking component;

The guide rail assembly includes guide rail grooves and guide rails, the guide rails are fixedly arranged on the upper side of the frame, the guide rail grooves are arranged on the lower side of the bed, and the guide rail grooves are correspondingly arranged with the guide rails, The upper side surface of the guide rail groove is fitted with the upper side surface of the guide rail, and a vertical lift margin is provided between the upper side surface of the guide rail groove and the upper side surface of the guide rail;

The locking assembly includes a locking block, a locking screw rod and an adjustment handle, the upper side of the guide rail is provided with a locking groove adapted to the locking block, and the upper end of the locking block is provided with a locking groove corresponding to the locking block. The screw hole for the locking screw, the lower end of the locking block is arranged in the locking groove, the lower part of the bed is arranged with a cylindrical cavity, and the locking screw is arranged in the cylindrical cavity , and the outer side of the locking screw is rotatably connected to the inner side of the cylindrical cavity, the inner end of the locking screw is movably connected to the locking block through threads, and the outer side of the locking screw is movably connected to the locking block. The end is arranged on the outside of the bed and is fixedly connected with the adjusting handle.
The cylindrical grinding machine according to claim 5, wherein the Z-axis guide rail assembly comprises a guide rail body and a static pressure support assembly, the guide rail body is fixedly arranged on the upper side of the bed, and the working The lower side of the table is provided with a guide rail groove adapted to the guide rail body;

The static pressure support assembly includes a side guide rail static pressure oil chamber group, a main bearing static pressure oil chamber and an oil supply system, the side guide rail static pressure oil chamber group is arranged on the side of the guide rail groove, and the side rail The static pressure oil chamber group of the guide rail is correspondingly arranged on the side of the guide rail body, and a plurality of the main bearing static pressure oil chambers are arranged on the bottom surface of the guide rail groove, and the main bearing static pressure oil chamber is connected to the guide rail. The top surface of the main body is correspondingly arranged, and both the side guide rail static pressure oil chamber group and the main bearing static pressure oil chamber are communicated with the oil outlet end of the oil supply system through a static pressure oil passage.
The cylindrical grinding machine according to claim 7, wherein the Z-axis guide rail assembly is further configured with a negative pressure adsorption assembly, and the negative pressure adsorption assembly uses negative pressure to adsorb the guide rail body so that the worktable and the The relative movement between the guide rail bodies is stable;

The negative pressure adsorption assembly includes a negative pressure ring groove and a negative pressure system, the negative pressure ring groove is fixedly arranged on the bottom surface of the guide rail groove, and the negative pressure ring groove communicates with the negative pressure of the negative pressure system through an air circuit. The negative pressure ring groove is arranged between the side guide rail static pressure oil chamber group and the main bearing static pressure oil chamber, and the negative pressure ring groove close to the side of the guide rail groove is arranged in the The main carrier carries the periphery of the hydrostatic oil chamber.
The cylindrical grinding machine according to claim 7, further comprising a headstock, a tailstock and an adjusting device, wherein the headstock and the tailstock are movably connected to the bed through the adjusting device , the adjusting device includes a fixing component and an adjusting component, the fixing component is fixedly connected with the lower side of the headstock/tailstock and the upper side of the bed, and the adjusting component is arranged on the fixing component inside, and the adjusting component is slidingly fitted with the fixing component.
The cylindrical grinding machine according to claim 9, wherein the fixing assembly comprises a left fixing guide plate and a right fixing guide plate, and the left fixing guide plate and the right fixing guide plate are both Vertically arranged, and the left fixed guide plate and the right fixed guide plate are arranged between the head frame/tail frame and the bed, and the left fixed guide plate and the head frame/ The lower side of the tail frame/the upper side of the bed is fixedly connected, and the right fixed guide plate is fixedly connected with the upper side of the bed/the lower side of the head frame/tail frame;

The adjustment assembly includes a wedge assembly and an adjustment assembly, the wedge assembly is arranged between the left fixed guide plate and the right fixed guide plate, and the left side/right side of the wedge assembly is an inclined surface , the left side of the wedge assembly is slidably attached to the right side of the left fixed guide plate, and the right side of the wedge assembly is slidably attached to the left side of the right fixed guide plate , the adjustment assembly is fixedly connected with one end of the wedge assembly;

The wedge-shaped assembly includes a wedge-shaped block and a guide rail module, the left and right sides of the wedge-shaped block are inclined surfaces, and the inner sides of the two guide rail modules are respectively connected with the left and right sides of the wedge-shaped block. The guide rail module and the wedge-shaped block are fixedly connected, and the outer sides of the two guide rail modules are respectively slidably fitted with the left fixed guide plate and the right fixed guide plate.