CN115338698A - High-precision CNC grinding machine for complex tools - Google Patents

Abstract

The invention discloses a special high-precision numerical control grinding machine for complex cutters, which comprises a T-shaped bedstead, wherein a lathe bed is arranged above one side of the bedstead, the front end part of the lathe bed is connected with a headstock component and a tailstock component which are used for clamping a hob, a grinding wheel repairing device is arranged on the headstock component, a stand column component is arranged above the other side of the bedstead, and a main shaft grinding carriage is arranged on the stand column component. The grinding device can grind the cutting edge of the whole hob through one-time clamping, can improve the grinding efficiency of the hob and reduce the grinding cost of the hob while ensuring the precision of the hob, and is suitable for precision grinding of complex cutters.

Description

High-precision CNC grinding machine for complex tools

technical field

The invention relates to the technical field of machine tools, in particular to a special-purpose high-precision numerical control grinding machine for complex cutting tools.

Background technique

Hob grinding machines typically use multiple grinding wheels when grinding the tooth profile of cutting tools such as modular multi-faceted gear hobs, worm gear hobs, constant normal base hobs, and milling cutters The entire tooth profile on flank and crest features. The existing hob grinding machine tools have the following disadvantages. First, they can only grind the rake face or tooth shape of the hob, that is, after the rake face is processed on one machine tool, it needs to be ground again. Re-clamp the hob on another machine tool, and then grind the tooth profile of the hob, referring to faces 2, 3, 4, 5, 6, and 7. This will cause inconsistencies in the clamping state, which will affect the accuracy of the entire cutting edge of the hob. precision. Second, the grinding of the cutting edge of the whole hob needs to increase the time of the secondary clamping of the hob, so the grinding time of the whole hob will be longer. Third, the entire hob cutting edge needs to be ground on two machine tools, which greatly increases the cost of hob grinding. Therefore, how to provide a special high-precision CNC grinding machine for complex tools is an urgent problem to be solved by those skilled in the art.

Contents of the invention

One purpose of the present invention is to propose a high-precision CNC grinding machine for complex tools. The present invention can grind the cutting edge of the entire hob after one clamping, and can ensure the accuracy of the hob while improving the grinding efficiency of the hob. , Reduce the grinding cost of the hob.

According to an embodiment of the present invention, a special high-precision CNC grinding machine for complex tools is characterized in that it includes a T-shaped bed frame, a bed is provided above one side of the bed frame, and the front end of the bed is connected with a roller for clamping. A headstock assembly and a tailstock assembly of the knife, a grinding wheel repairer is arranged on the headstock assembly, a grinding wheel column assembly is installed on the other side of the bed frame, and a main shaft grinding wheel frame is installed on the column assembly.

Preferably, the head frame assembly includes a torque motor, a torque motor stator is arranged in the torque motor, a torque motor mover is arranged in the rotation of the torque motor stator, a main shaft is arranged in the center of the torque motor mover, the A hob is directly connected to the end of the main shaft, and the torque motor is equipped with an absolute value circular grating, which includes a circular grating fixing part installed at the rear of the torque motor stator and Part of the circular grating rotating part.

Preferably, the tailstock part is used to tighten the hob, and includes an oil cylinder, and the oil cylinder is connected with a large center and a small center for control, and the large center and the small center are connected by a screw for switching them. A handwheel, and a limit block is arranged on the side of the tailstock component.

Preferably, the bed includes a direct-drive motor for driving the X-axis and the Z-axis, the direct-drive motor is equipped with an absolute value linear grating, and the absolute value linear grating is connected with a linear drive for driving its operation. A motor, the linear motor is provided with a linear motor stator and a linear motor mover.

Preferably, the C-axis in the grinding wheel column component includes a C-axis torque motor for driving its rotation, and the C-axis torque motor is provided with a C-axis torque motor stator, a C-axis torque motor rotor and a C-axis torque motor circular grating , the output end of the C-axis torque motor is annularly provided with a piston oil cylinder, the piston oil cylinder includes an oil cylinder piston cylinder, an oil cylinder piston rod arranged in the oil cylinder piston cylinder, and a disc is arranged between the oil cylinder piston rod and the oil cylinder piston cylinder reed.

Preferably, the spindle grinding wheel includes a C-axis rotary connection plate, a spindle motor arranged in the C-axis rotary connection plate, a spindle encoder is arranged in the spindle motor, and a belt is connected to the output end of the spindle motor. The belt drive is connected to the grinding wheel.

Preferably, the torque motor is equipped with an absolute value circular grating. When the rotation angle of the C-axis is combined with the helix angle of the hob, the oil supply to the clamping cylinder is stopped, so that the disc spring performs a reset action, and the C-axis is clamped to ensure The C-axis angle of the machine tool does not change during the grinding process.

Preferably, the spindle component includes a spindle motor, and the end of the spindle motor drives the grinding wheel to rotate through a belt.

Preferably, the grinding wheel dresser includes an internal grinding wheel driving motor, and the output end of the motor is directly connected with a diamond roller, and the diamond roller is set to a suitable shape and size, and is equipped with a built-in AE sensor for Judge whether the grinding wheel dressing is accurate.

The beneficial effects of the present invention are:

The invention fixes the hob between the headstock and the tailstock, clamps the hob by feeding the oil cylinder, and rotates the C-axis to make the grinding wheel of the main shaft motor contact the tooth profile of the hob to grind the tooth profile of the hob. After completion, rotate the C-axis to make the grinding wheel of the spindle motor contact the rake face of the hob, and grind the rake face of the hob, so that all the cutting surfaces of the hob are ground. The grinding time of the present invention reduces the secondary clamping time of the workpiece, saves one-tenth of the entire beat, and at the same time improves the precision by nearly one-tenth compared with the current grinding precision, and can ensure the precision of the hob At the same time, the grinding efficiency of the hob is improved, and the grinding cost of the hob is reduced.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is the structural representation of the special-purpose high-precision numerical control grinding machine for complex cutting tool that the present invention proposes;

Fig. 2 is the structural representation of the torque motor in the high-precision CNC grinder headstock dedicated to complex cutters proposed by the present invention;

Fig. 3 is the front top view structure schematic diagram of the tailstock in the special high-precision CNC grinding machine for complex cutting tools proposed by the present invention;

Fig. 4 is the side overlooking structure schematic diagram of the tailstock in the special high-precision CNC grinding machine for complex tools proposed by the present invention;

Fig. 5 is the structural representation of the emery wheel column in the special high-precision numerically controlled grinding machine for complex cutting tool that the present invention proposes;

Fig. 6 is a schematic structural view of the C-axis of the grinding wheel column in the high-precision CNC grinding machine for complex tools proposed by the present invention;

Fig. 7 is the schematic structural view of the spindle grinding wheel in the high-precision CNC grinding machine for complex tools proposed by the present invention;

Fig. 8 is a schematic structural view of the bed in the high-precision CNC grinding machine for complex tools proposed by the present invention;

Fig. 9 is a schematic structural diagram of a grinding wheel dresser in the high-precision CNC grinding machine for complex tools proposed by the present invention.

In the figure: 1-bed bed, 2-grinding wheel column, 3-headstock, 4-tailstock, 5-spindle grinding wheel, 6-grinding wheel dresser, 7-spindle, 8-circular grating rotating part, 9-circular grating fixation Department, 10-handwheel, 11-screw, 12-big top, 13-small top, 14-limit block, 15-oil cylinder, 16-C-axis torque motor, 19-disc spring, 20-cylinder piston rod, 22 -Oil cylinder piston cylinder, 23-Spindle motor, 24-C-axis rotary connecting plate, 25-Spindle encoder, 26-Grinding wheel, 27-Belt, 28-Linear grating, 29-Linear motor, 30-Grinding wheel drive motor, 31- Diamond roller, 32-AE sensor.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Referring to Figures 1-9, a high-precision CNC grinding machine dedicated to complex tools is characterized in that it includes a T-shaped bed frame, a bed 1 is arranged above one side of the bed frame, and the front end of the bed 1 is connected to a hob for clamping Headstock 3 assemblies and tailstock 4 assemblies, and headstock 3 assemblies are provided with emery wheel 26 repairers, and emery wheel 26 column 2 assemblies are installed on the bed frame other side top, and main shaft emery wheel 5 frames are installed on the column assembly.

The head frame 3 assembly includes a torque motor, a torque motor stator is arranged in the torque motor, a torque motor mover is arranged in the rotation of the torque motor stator, a main shaft 7 is arranged in the center of the torque motor mover, and a hob is directly connected to the end of the main shaft 7, And the torque motor is equipped with an absolute value circular grating, and the absolute value circular grating includes a circular grating fixing part 9 installed at the rear of the torque motor stator and a circular grating rotating part 8 installed at the rear of the torque motor rotor.

4 parts of the tailstock are used to tighten the hob, including an oil cylinder 15. The oil cylinder 15 is controlled and connected with a large top 12 and a small top 13, and the large top 12 and the small top 13 are connected by a screw 11 to be used for switching. Wheel 10, limit block 14 is arranged on the side of tailstock 4 parts.

The bed 1 includes a direct-drive motor for driving the X-axis and the Z-axis. The direct-drive motor is equipped with an absolute value linear grating 28, and the absolute value linear grating 28 is connected with a linear motor 29 for driving its operation. The linear motor 29 29 stators of linear motors and 29 movers of linear motors are arranged inside.

The C axis in the grinding wheel 26 column 2 components includes a C axis torque motor 16 for driving its rotation, and the C axis torque motor 16 is provided with a C axis torque motor 16 stator, a C axis torque motor 16 rotor and a C axis torque motor 16 circular grating The output end of the C-axis torque motor 16 is annularly provided with a piston oil cylinder, the piston oil cylinder includes an oil cylinder piston cylinder 22, an oil cylinder piston rod 20 arranged in the oil cylinder piston cylinder 22, and a disc is arranged between the oil cylinder piston rod 20 and the oil cylinder piston cylinder 22. Spring 19.

The spindle grinding wheel 5 includes a C-axis rotary connecting plate 24, a spindle motor 23 arranged in the C-axis rotary connecting plate 24, a spindle encoder 25 is arranged in the spindle motor 23, and a belt 27 is connected to the output end of the spindle motor 23. The belt 27 A grinding wheel 26 is connected to the drive.

The torque motor is equipped with an absolute value circular grating. When the rotation angle of the C-axis is combined with the helix angle of the hob, the oil supply to the clamping cylinder 15 is stopped, so that the disc spring 19 performs a reset action, and the C-axis is clamped to ensure that the machine tool is grinding. The C-axis angle does not change during the cutting process.

The parts of the main shaft 7 include a main shaft motor 23 , and the end of the main shaft motor 23 drives the grinding wheel 26 to rotate through a belt 27 .

The grinding wheel dresser 6 includes an internal grinding wheel driving motor 30, and the output end of the motor is directly connected with a diamond roller 31. The diamond roller 31 is set to a suitable shape and size, and is equipped with a built-in AE sensor 32, which is used to judge whether the grinding wheel 26 is dressed. Is it accurate.

The present invention fixes the hob between the headstock 3 and the tailstock 4, clamps the hob by feeding the oil cylinder 15, and rotates the C-axis to make the spindle motor 23 and the grinding wheel 26 contact the hob tooth profile, and the hob tooth profile is adjusted. Grinding, after the grinding is finished, rotate the C-axis to make the spindle motor 23 emery wheel 26 contact with the rake face of the hob, and grind the rake face of the hob, so that all the cutting surfaces of the hob are ground. The grinding time of the present invention reduces the secondary clamping time of the workpiece, saves one-tenth of the entire beat, and at the same time improves the precision by nearly one-tenth compared with the current grinding precision, and can ensure the precision of the hob At the same time, the grinding efficiency of the hob is improved, and the grinding cost of the hob is reduced.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (9)

1. A high-precision CNC grinding machine dedicated to complex cutting tools, characterized in that it comprises a T-shaped bed frame, a bed is arranged above one side of the bed frame, and a head frame for clamping a hob is connected to the front end of the bed frame Assembly and tailstock assembly, the headstock assembly is provided with a grinding wheel repairer, the other side of the bed frame is equipped with a grinding wheel column assembly, and the column assembly is equipped with a spindle grinding wheel frame. 2. The special high-precision CNC grinding machine for complex cutting tools according to claim 1, wherein the headstock assembly includes a torque motor, a torque motor stator is arranged in the torque motor, and a torque motor stator is rotated in the torque motor A torque motor mover, the center of the torque motor mover is provided with a main shaft, the end of the main shaft is directly connected to a hob, and the torque motor is equipped with an absolute value circular grating, and the absolute value circular grating includes a The circular grating fixed part at the rear of the torque motor stator and the circular grating rotating part installed at the rear of the torque motor mover. 3. The special high-precision CNC grinding machine for complex tools according to claim 1, characterized in that, the tailstock part is used for tightening the hob, including an oil cylinder, and the oil cylinder is controlled to be connected with a large center and a small center , the large top and the small top are connected with a hand wheel for switching them through a screw, and a limit block is arranged on the side of the tailstock component. 4. The special high-precision CNC grinding machine for complex tools according to claim 1, characterized in that, the bed includes a direct-drive motor for driving the X-axis and the Z-axis, and the direct-drive motor is equipped with an absolute A value linear grating, the absolute value linear grating is connected with a linear motor for driving its operation, and a linear motor stator and a linear motor mover are arranged in the linear motor. 5. The special high-precision CNC grinding machine for complex tools according to claim 1, wherein the C-axis in the grinding wheel column part includes a C-axis torque motor for driving its rotation, and the C-axis torque motor is provided with a The stator of the C-axis torque motor, the rotor of the C-axis torque motor and the circular grating of the C-axis torque motor, the output end of the C-axis torque motor is annularly provided with a piston oil cylinder, and the piston oil cylinder includes an oil cylinder piston cylinder, a cylinder arranged in the oil cylinder piston cylinder The piston rod of the oil cylinder is provided with a disc spring between the piston rod of the oil cylinder and the piston cylinder of the oil cylinder. 6. The special high-precision CNC grinding machine for complex tools according to claim 1, characterized in that, the spindle grinding wheel comprises a C-axis rotary connection plate, a spindle motor arranged in the C-axis rotary connection plate, and the spindle motor is provided with There is a spindle encoder, the output end of the spindle motor is driven and connected with a belt, and the belt is driven and connected with a grinding wheel. 7. The special high-precision CNC grinding machine for complex tools according to claim 1, characterized in that the torque motor is equipped with an absolute value circular grating, and when the rotation angle of the C-axis is combined with the helix angle of the hob, the clamping is stopped. The oil supply of the oil cylinder makes the disc spring reset and clamp the C-axis to ensure that the angle of the C-axis remains unchanged during the grinding process of the machine tool. 8. The special high-precision CNC grinding machine for complex tools according to claim 1, wherein the main shaft part includes a main shaft motor, and the end of the main shaft motor drives the grinding wheel to rotate through a belt. 9. The special-purpose high-precision numerical control grinding machine for complex cutting tools according to claim 1, characterized in that, the grinding wheel dresser includes an internally arranged grinding wheel drive motor, and the output end of the motor is directly connected with a diamond roller, and the diamond roller It is set to match the shape and size, and is equipped with a built-in AE sensor to judge whether the grinding wheel dressing is accurate.

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