Drill bit grinding machine

Abstract

The present invention relates to a drill grinding machine, which comprises a frame, a grinding wheel, a revolution device arranged on the frame and a rotation device fixedly connected to the revolution device, a drill bit is fixedly arranged on the rotation device, the grinding wheel machine is arranged corresponding to the drill bit, and a feeding mechanism for controlling the distance between the drill bit and the grinding wheel machine is arranged on the frame; the revolution device is connected to a revolution drive device, the rotation device is connected to a rotation drive device, the revolution axis of the revolution device and the rotation axis of the rotation device are at an angle α of 0° to 50°, the swing angle of the rotation axis is 35° to 40°, and the rotation axis rotates synchronously with the revolution axis. The structure is simple, and the grinding method combining the revolution and rotation of the drill bit is adopted for grinding. Through the movement of the rotation axis, the top angle of the drill bit can be ground and the chisel edge angle can be corrected. Through the joint movement of the revolution axis and the rotation axis, the back angle, chisel edge and main cutting edge of different parts of the drill bit can be ground.

Description

Technical Field

[0001] The invention relates to the technical field of drill bit sharpening equipment, in particular to a drill bit grinding machine. Background Art

[0002] The drill bit is the most commonly used chip cutting tool in the machining process. Its cutting elements are crucial and directly affect the processing quality of the drilled workpiece, such as the hole size accuracy and the surface finish of the hole. When sharpening a twist drill, only the two main back faces need to be sharpened, but at the same time, the appropriate size of the back angle, top angle and cross-edge bevel angle must be ensured, so the sharpening of the twist drill is relatively difficult. It is difficult to ensure the cutting elements of the drill bit by manual grinding, and the accuracy depends entirely on experience. The detection method is visual estimation and trial tool correction. Drill bits that rely on manual grinding are prone to various problems during the cutting process, such as excessive hole size accuracy and poor finish, which not only affects the processing quality, but also shortens the life of the drill bit and increases the cost. There are currently special drill bit sharpening machines, but the operation is cumbersome and the cost is high.

[0003] After the twist drill is sharpened, the following two requirements must be met. 1. The two main cutting edges of the twist drill should be symmetrical, that is, the two main cutting edges form equal angles with the axis of the drill bit and have equal lengths. 2. The transverse blade angle is 50°~55°. The transverse blade angle can check whether the back angle and front angle of the drill bit are correctly sharpened, because the larger the transverse blade angle, the larger the front angle near the drill core, the smaller the back angle, and the worse the cutting environment. If the angle is too small, the other edge near the drill core will be ground off, resulting in inability to cut or extremely high cutting resistance. Whether it is the existing manual grinding or the drill bit sharpening machine, it is impossible to accurately correct the transverse blade bevel angle. For drill bits with deviations in the transverse blade bevel angle, the deviation in the transverse blade bevel angle often still exists after grinding, and the drill bit has poor cutting ability.

[0004] In response to the above problems, the present invention provides a drill grinding machine which has a simple structure and adopts a grinding method that combines the revolution and rotation of the drill bit for grinding. Through the movement of the rotation shaft, the top angle of the drill bit can be ground and the bevel angle of the transverse edge can be corrected. Through the combined movement of the revolution shaft and the rotation shaft, the back angle, transverse edge and main cutting edge of different parts of the drill bit can be ground. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a drill grinding machine with a simple structure. It adopts a grinding method that combines the revolution and rotation of the drill bit for grinding. Through the movement of the rotation shaft, the top angle of the drill bit can be ground and the bevel angle of the transverse edge can be corrected. Through the combined movement of the revolution shaft and the rotation shaft, the back angle, transverse edge and main cutting edge of different parts of the drill bit can be ground.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] A drill grinding machine comprises a frame, a grinding wheel, a revolution device arranged on the frame and a rotation device fixedly connected to the revolution device, the rotation device clamps a drill bit, the grinding wheel is arranged corresponding to the drill bit, and the frame is provided with a feeding mechanism for controlling the distance between the drill bit and the grinding wheel; the revolution device is connected to a revolution drive device, and the rotation device is connected to the rotation drive device, the revolution axis of the revolution device and the rotation axis of the rotation device are at an angle α of 0° to 50°, the swing angle of the rotation axis is 35° to 40°, and the rotation axis rotates synchronously with the revolution axis.

[0008] As a further improvement of the present invention, the frame includes a base, a support plate arranged on the base, a disc arranged on the support plate and two vertical brackets arranged on the disc, and a revolution device is arranged between the two brackets; the revolution device includes a revolution shaft and the revolution drive device, the revolution drive device is a rotating handle fixedly arranged on the revolution shaft, and bearings are arranged between the two ends of the revolution shaft and the brackets;

[0009] A rotation device is fixedly arranged below the revolution device, and the rotation device comprises a rotation device body, a rotation shaft arranged on the rotation device body and a clamping device, a bearing is arranged between the rotation shaft and the rotation device body, the clamping device is arranged at the front end of the rotation shaft, and a connecting sleeve is fixedly arranged at the rear end of the rotation shaft; the rotation drive device is a connecting rod mechanism arranged between the rotation device and the disc, and the connecting rod mechanism comprises connecting rod one, connecting rod two, connecting rod three, connecting rod four, connecting rod five, which are hinged together in sequence by an axle pin, wherein the free end of the connecting rod five is hinged to the rotation device body by an axle pin, the connecting rod four is hinged to a support fixed on the disc by an axle pin, and the free end of the connecting rod one is fixedly connected to the connecting sleeve.

[0010] As a further improvement of the present invention, the axis of the axle pin between the connecting rod five and the rotation device body, the axis of the axle pin between the connecting rod five and the connecting rod four, the axis of the axle pin between the connecting rod four and the connecting rod three, and the axis of the axle pin between the connecting rod four and the support are all parallel to the axis of the revolving axis; the axis of the axle pin between the connecting rod three and the connecting rod two, and the axis of the axle pin between the connecting rod two and the connecting rod one are all parallel to the axis of the rotation axis.

[0011] As a further improvement of the present invention, the clamping device includes an upper baffle and a lower baffle relatively fixed at the front end of the rotating shaft, the relative surfaces of the upper baffle and the lower baffle are parallel to each other and are centrally symmetrical about the axis of the rotating shaft, two movable clamps are arranged between the upper baffle and the lower baffle, and the two movable clamps are also centrally symmetrical about the axis of the rotating shaft, an L-shaped connecting arm is fixed to the outer end of the movable clamp, a nut is fixed to the top of the vertical part of the connecting arm, a fixing component is fixed to the upper side of the upper baffle, two clamping screws matching the nuts are coaxially fixed on the fixing component, the thread rotation directions of the two clamping screws are opposite, and corresponding arc-shaped or V-shaped grooves for placing drill bits are provided in the middle part of the inner side of the two movable clamps along the axis direction of the rotating shaft.

[0012] As a further improvement of the present invention, the feeding mechanism is arranged between the support plate and the base, and the feeding mechanism includes mounting plates fixedly arranged at both ends of the base and a plurality of sliding rods fixedly arranged between the mounting plates, a sliding sleeve is provided on the sliding rod, a support block is fixedly arranged above the sliding sleeve, the support block is fixedly arranged together with the support plate, and the rear end of the support plate is connected to the driving device.

[0013] As a further improvement of the present invention, a fastening device is fixedly provided on the top of the rotation device body, and the fastening device includes a base plate and a fixed sleeve respectively arranged above and below the revolution axis, the base plate is fixedly provided on the top of the rotation device body, the fixed sleeve is provided with a groove matching the contour of the revolution axis, the fixed sleeve and the base plate are fastened together by bolts, and the rotating handle is fixed on the fixed sleeve.

[0014] As a further improvement of the present invention, a rubber gasket is provided between the base plate and the fixing sleeve and the revolution shaft.

[0015] As a further improvement of the present invention, a rotating device and a locking device are provided between the disc and the support plate.

[0016] As a further improvement of the present invention, the grinding machine is arranged on a base so as to be reciprocatingly movable along the grinding wheel axis, and a fastening device for fixing the grinding machine is provided on the base.

[0017] As a further improvement of the present invention, the distance Y between the revolution axis and the rotation axis and the vertical distance X between different grinding parts of the drill bit and the revolution axis satisfy the functional relationship Y=aX, where a is a coefficient and is a value between 0.36 and 0.57.

[0018] The beneficial effects of adopting the above technical solution are:

[0019] The drill grinding machine provided by the present invention has a simple structure and adopts a grinding method combining the revolution and rotation of the drill bit for grinding. Through the movement of the rotation axis, the top angle of the drill bit can be ground and the bevel angle of the transverse edge can be corrected. Through the joint movement of the revolution axis and the rotation axis, the back angle, transverse edge and main cutting edge of different parts of the drill bit can be ground. According to the drill bit style, the angle between the revolution axis and the rotation axis, the swing angle of the rotation axis and the swing angle of the revolution axis are selected. According to the drill bit and the equipment structure, the value of the coefficient a in the function relationship Y=aX is reasonably selected from 0.36~0.57, which can ensure that the various geometric angles of the drill bit ground meet the requirements and the drill bit cutting ability at the grinding point is strong.

[0020] The rotation drive device is a connecting rod mechanism arranged between the rotation device and the disc. It is cleverly designed and the sizes of connecting rod one, connecting rod two, connecting rod three, connecting rod four and connecting rod five are reasonably set to satisfy the proportional relationship between the swing angles of the rotation axis and the revolution axis. The synchronous control of the revolution device and the rotation device is achieved by manipulating the rotating handle.

[0021] By setting the feeding mechanism, the distance between the grinding part of the drill bit and the grinding wheel can be adjusted, which is convenient for grinding the drill bit. The grinding wheel machine can be reciprocated along the grinding wheel axis and is arranged on a base. The base is provided with a fastening device for fixing the grinding wheel machine. By adjusting the grinding wheel position along the grinding wheel axis, different parts of the grinding wheel can be ground, which can extend the service life of the grinding wheel. The clamping device cleverly realizes the synchronous movement of the two movable clamping plates by cooperating with the nut through the opposite thread rotation direction of the two clamping screws in the clamping device, ensuring that the axis of the drill bit coincides with the axis of the rotation shaft after the drill bit is clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0025] Figure 3 It is a left-side structural schematic diagram of the present invention.

[0026] Wherein: 1 base, 2 mounting plate, 3 support block, 4 slide bar, 5 slide sleeve, 6 support plate, 7 disc, 8 bracket, 9 revolution axis, 10 fastening device, 10-1 bottom plate, 10-2 fixed sleeve, 11 rotation device body, 12 rotation axis, 13 connecting sleeve, 14 connecting rod one, 15 connecting rod two, 16 connecting rod three, 17 connecting rod four, 18 connecting rod five, 19 support, 20 rotating handle, 21 upper baffle plate, 22 lower baffle plate, 23 movable clamp plate, 24 connecting arm, 25 nut, 26 clamping screw, 27 fixing component, 28 drill bit, 29 grinding wheel, 30 base. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1-3 A drill grinding machine shown in the figure comprises a frame, a grinding wheel, a revolution device arranged on the frame and a rotation device fixedly connected to the revolution device, a drill 28 is clamped on the rotation device, and a grinding wheel 29 on the grinding wheel machine is arranged corresponding to the grinding part of the drill 28. The arrangement method is common knowledge in the art and is not described here. A feeding mechanism for controlling the distance between the drill 28 and the grinding wheel machine is also arranged on the frame to facilitate the grinding of the drill. The revolution device is connected to the revolution drive device, and the rotation device is connected to the rotation drive device. The revolution axis of the revolution device and the rotation axis of the rotation device are at an angle α of 0° to 50°. The revolution axis 9 and the rotation axis 12 do not rotate all the time, but swing within a certain angle. The swing angle of the rotation axis is 35 to 40°. The rotation axis rotates synchronously with the revolution axis, and the swing angle between them is in a certain proportional relationship according to the different styles of the drill 28. The distance Y between the revolution axis 9 and the rotation axis 12 and the vertical distance X between different grinding parts of the drill bit 28 and the axis of the revolution axis 9 satisfy the functional relationship Y=aX, where a is a coefficient, which is a value between 0.36 and 0.57.

[0029] The structure is simple, and the drill bit is ground by a grinding method combining revolution and rotation. The top angle of the drill bit can be ground and the bevel angle of the transverse edge can be corrected by the movement of the rotation axis. The back angle, transverse edge and main cutting edge of different parts of the drill bit can be ground by the joint movement of the revolution axis 9 and the rotation axis 12. The angle α between the revolution axis and the rotation axis is one of the parameters that determine the back angle angle of different parts of the back face of the drill bit 28. The function relationship Y=aX is also one of the parameters that determine the back angle angle of different parts of the back face of the drill bit 28. According to the style of the drill bit 28 and the equipment structure, the angle α, the swing angle of the rotation axis 12 and the swing angle of the revolution axis 9 are reasonably selected to ensure that the various geometric angles of the drill bit 28 ground meet the requirements, ensure that the back angle size at the outer circle of the drill bit is between 8° and 10°, and the back angle size close to the transverse edge is between 20° and 25°, so that the drill bit 28 has a strong cutting ability. The angle α between the revolution axis and the rotation axis, the swing angle of the rotation axis 12, the swing angle of the revolution axis 9, the value of the coefficient a in the functional relationship Y=aX, and the values ​​of Y and X can be determined by calculation or continuous experimental testing according to the drill bit 28 style.

[0030] The frame includes a base 1, a support plate 6 arranged on the base 1, a disc 7 arranged on the support plate 6 and two vertical brackets 8 arranged on the disc 7, and a revolution device is arranged between the two brackets 8; the revolution device includes a revolution shaft 9 and the revolution drive device, and the revolution drive device is a rotating handle 20 fixedly mounted on the revolution shaft 9, and bearings are arranged between the two ends of the revolution shaft 9 and the brackets 8.

[0031] A rotation device is fixedly provided below the revolution device, and the rotation device includes a rotation device body 11, a rotation shaft 12 and a clamping device arranged on the rotation device body 11, a bearing is arranged between the rotation shaft 12 and the rotation device body 11, in this embodiment, the rotation shaft 12 is a stepped shaft, the front end diameter is larger than the rear end diameter, the clamping device is arranged at the front end of the rotation shaft 12, and a connecting sleeve 13 is fixedly provided at the rear end of the rotation shaft 12; the rotation drive device is a connecting rod mechanism arranged between the rotation device and the disc 7, and the connecting rod mechanism includes a connecting rod 14, a connecting rod 2 15, a connecting rod 3 16, a connecting rod 4 17, and a connecting rod 5 18 which are hinged together in sequence by an axle pin, wherein the free end of the connecting rod 5 18 is hinged to the rotation device body 11 by an axle pin, the connecting rod 4 17 is hinged to a support 19 fixed on the disc 7 by an axle pin, and the free end of the connecting rod 14 is fixedly connected to the connecting sleeve 13. The axis of the shaft pin between the fifth connecting rod 18 and the rotation device body 11, the axis of the shaft pin between the fifth connecting rod 18 and the fourth connecting rod 17, the axis of the shaft pin between the fourth connecting rod 17 and the third connecting rod 16, and the axis of the shaft pin between the fourth connecting rod 17 and the support 19 are all parallel to the axis of the revolution axis 9; the axis of the shaft pin between the third connecting rod 16 and the second connecting rod 15, and the axis of the shaft pin between the second connecting rod 15 and the first connecting rod 14 are all parallel to the axis of the rotation axis 12. The rotation drive device is a connecting rod mechanism provided between the rotation device and the disk 7, which is cleverly designed, and the dimensions of the first connecting rod 14, the second connecting rod 15, the third connecting rod 16, the fourth connecting rod 17, and the fifth connecting rod 18 are reasonably set to meet the proportional relationship between the swing angles of the rotation axis 12 and the revolution axis 9, and the synchronous control of the revolution device and the rotation device is achieved by manipulating the rotating handle 20.

[0032] The clamping device includes an upper baffle 21 and a lower baffle 22 which are relatively fixed to the front end of the rotating shaft, the opposite surfaces of the upper baffle 21 and the lower baffle 22 are parallel to each other and are centrally symmetrical about the axis of the rotating shaft 12, two movable clamps 23 are arranged between the upper baffle 21 and the lower baffle 22, and the two movable clamps 23 are also centrally symmetrical about the axis of the rotating shaft 12, an L-shaped connecting arm 24 is fixed to the outer end of the movable clamp 23, a nut 25 is fixed to the top of the vertical part of the connecting arm 24, a fixing component 27 is fixed to the upper side of the upper baffle 21, two clamping screws 26 matching the nut 25 are coaxially fixed on the fixing component 27, the thread rotation directions of the two clamping screws 26 are opposite, and the middle part of the inner side of the two movable clamps 23 is provided with a corresponding arc or V-shaped groove for placing a drill bit 28 along the axis direction of the rotating shaft 12. In this embodiment, the fixed component 27 is a double-shaft motor, and the two output shafts of the double-shaft motor are coaxially fixed with the two clamping screws 26 respectively. The thread rotation directions of the two clamping screws 26 are opposite. By cooperating with the nut 25, under the drive of the double-shaft motor, the synchronous movement of the two movable clamps 23 is cleverly achieved, ensuring that the axis center of the drill bit 28 coincides with the axis center of the rotating shaft 12 after the drill bit 28 is clamped.

[0033] The feeding mechanism is arranged between the support plate 6 and the base 1, and the feeding mechanism includes a mounting plate 2 fixedly arranged at both ends of the base 1 and a plurality of slide bars 4 fixedly arranged between the mounting plates 2, a sleeve 5 is sleeved on the slide bar 4, a support block 3 is fixedly arranged above the sleeve 5, the support block 3 is fixedly arranged with the support plate 6, and the rear end of the support plate 6 is connected to a driving device, which can be a hydraulic cylinder, which is a common technical means in the mechanical field and will not be described here. By setting the feeding mechanism, the distance between the grinding part of the drill bit 28 and the grinding wheel 29 can be adjusted.

[0034] A fastening device is fixedly arranged on the top of the rotation device body, and the fastening device includes a bottom plate 10-1 and a fixing sleeve 10-2 respectively arranged above and below the revolution axis 9, the bottom plate 10-1 is fixedly arranged on the top of the rotation device body 11 by bolts, the fixing sleeve 10-2 is provided with a groove matching the contour of the revolution axis 9, the fixing sleeve 10-2 and the bottom plate 10-1 are fastened together by bolts, and the rotating handle 20 is fixedly arranged on the fixing sleeve 10-2. A rubber gasket is arranged between the bottom plate 10-1 and the fixing sleeve 10-2 and the revolution axis 9.

[0035] A rotating device and a locking device are provided between the disc 7 and the support plate 6, and the angles of the revolution device and the rotation device relative to the grinding wheel 29 can be adjusted according to the different top angles and back angles of the drill bit.

[0036] The grinding machine can be reciprocated along the axis of the grinding wheel 29 and is arranged on a base 30. A fastening device for fixing the grinding machine is provided on the base 30. By adjusting the position of the grinding wheel 29 along the axis of the grinding wheel, different parts of the grinding wheel 29 can be ground, and the service life of the grinding wheel 29 can be extended.

[0037] As another embodiment, the rotation drive device and the revolution drive device can use two servo motors or rotating cylinders or a combination thereof to directly control the speed of the revolution shaft 9 and the rotation shaft 12 so as to maintain a set swing angle. At this time, the rotation angular velocities of the revolution shaft 9 and the rotation shaft 12 are kept constant.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drill bit grinding machine, characterized in that: It comprises a frame, a grinding wheel machine, a revolution device arranged on the frame and a rotation device fixedly connected to the revolution device, a drill bit is clamped on the rotation device, the grinding wheel machine is arranged corresponding to the drill bit, and a feeding mechanism for controlling the distance between the drill bit and the grinding wheel machine is arranged on the frame; the revolution device is connected to a revolution driving device, and the rotation device is connected to a rotation driving device, the included angle α between the revolution axis of the revolution device and the rotation axis of the rotation device is 0°~50°, the swing angle of the rotation axis is 35~40°, and the rotation axis rotates synchronously with the revolution axis; The frame includes a base, a support plate arranged on the base, a disc arranged on the support plate and two vertical brackets arranged on the disc, and a revolution device is arranged between the two brackets; the revolution device includes a revolution shaft and the revolution drive device, and the revolution drive device is a rotating handle fixedly arranged on the revolution shaft, and bearings are arranged between the two ends of the revolution shaft and the brackets; A rotation device is fixedly arranged below the revolution device, and the rotation device comprises a rotation device body, a rotation shaft arranged on the rotation device body, and a clamping device, a bearing is arranged between the rotation shaft and the rotation device body, the clamping device is arranged at the front end of the rotation shaft, and a connecting sleeve is fixedly arranged at the rear end of the rotation shaft; the rotation drive device is a connecting rod mechanism arranged between the rotation device and the disc, and the connecting rod mechanism comprises connecting rod one, connecting rod two, connecting rod three, connecting rod four, connecting rod five, which are hinged together in sequence through an axle pin, wherein the free end of the connecting rod five is hinged to the rotation device body through an axle pin, the connecting rod four is hinged to a support fixed on the disc through an axle pin, and the free end of the connecting rod one is fixedly connected to the connecting sleeve; The axis of the shaft pin between the connecting rod 5 and the rotating device body, the axis of the shaft pin between the connecting rod 5 and the connecting rod 4, the axis of the shaft pin between the connecting rod 4 and the connecting rod 3, and the axis of the shaft pin between the connecting rod 4 and the support are all parallel to the axis of the revolution axis; the axis of the shaft pin between the connecting rod 3 and the connecting rod 2, and the axis of the shaft pin between the connecting rod 2 and the connecting rod 1 are all parallel to the axis of the rotation axis; The feeding mechanism is arranged between the support plate and the base, and the feeding mechanism includes mounting plates fixedly arranged at both ends of the base and a plurality of slide bars fixedly arranged between the mounting plates, a slide sleeve is sleeved on the slide bar, a support block is fixedly arranged above the slide sleeve, the support block is fixedly arranged with the support plate, and the rear end of the support plate is connected to the driving device; A rotating device and a locking device are provided between the disc and the support plate; The distance Y between the revolution axis and the rotation axis and the vertical distance X between different grinding parts of the drill bit and the revolution axis satisfy the functional relationship Y=aX, where a is a coefficient and is a value between 0.36 and 0.

57.

2. A drill bit grinding machine according to claim 1, characterized in that: The clamping device includes an upper baffle and a lower baffle relatively fixedly arranged at the front end of the rotating shaft, the relative surfaces of the upper baffle and the lower baffle are parallel to each other and are centrally symmetrical about the axis of the rotating shaft, two movable clamps are arranged between the upper baffle and the lower baffle, and the two movable clamps are also centrally symmetrical about the axis of the rotating shaft, an L-shaped connecting arm is fixedly arranged at the outer end of the movable clamp, a nut is fixedly arranged at the top of the vertical part of the connecting arm, a fixing component is fixedly arranged on the upper side of the upper baffle, two clamping screws matching the nuts are coaxially fixedly arranged on the fixing component, the thread rotation directions of the two clamping screws are opposite, and corresponding arc-shaped or V-shaped grooves for placing drill bits are provided in the middle part of the inner side of the two movable clamps along the axis direction of the rotating shaft.

3. A drill bit grinding machine according to claim 1, characterized in that: A fastening device is fixedly provided on the top of the rotation device body, and the fastening device includes a base plate and a fixing sleeve respectively arranged above and below the revolution axis. The base plate is fixedly provided on the top of the rotation device body, and the fixing sleeve is provided with a groove matching the contour of the revolution axis. The fixing sleeve and the base plate are fastened together by bolts, and the rotating handle is fixed on the fixing sleeve.

4. A drill bit grinding machine according to claim 3, characterized in that: A rubber gasket is arranged between the bottom plate, the fixing sleeve and the revolution shaft.

5. The drill bit grinding machine according to claim 1, characterized in that: The grinding wheel machine is arranged on a base and can reciprocate along the grinding wheel axis. The base is provided with a fastening device for fixing the grinding wheel machine.

Images