Grinding wheel dressing device of vertical shaft parallel surface grinding machine

Abstract

The invention discloses a grinding wheel dressing device of a vertical shaft double-end-face grinding machine, relates to the field of grinding machine tools, and solves the problem that the service life is seriously affected by heating of a grinding wheel due to the fact that the use state of the grinding wheel is difficult to monitor when an existing grinding wheel dressing device of the vertical shaft double-end-face grinding machine is used. A conveying disc is rotationally connected to the machine body, the grinding mechanism comprises a switching table, an upper grinding wheel and a lower grinding wheel, and the switching mechanism comprises a driving pipe and a switching piece. When the conveying disc rotationally conveys raw materials, the upper grinding wheel and the lower grinding wheel are used for grinding the upper end face and the lower end face of the raw materials, and the switching mechanism drives the upper grinding wheel and the lower grinding wheel to rotate; the temperature of the upper grinding wheel and the temperature of the lower grinding wheel are sensed through the switching piece, the switching table is driven to rotate and switch after the temperature reaches the set value, the situation that the grinding efficiency and the service life are affected by too high temperature of the grinding wheels is avoided, meanwhile, continuous machining and grinding operation on elements is not affected in the switching process, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding machine tools, in particular to a grinding wheel dressing device for a vertical-spindle double-end-surface grinder. Background Art

[0002] The double-end surface grinder is a highly efficient plane processing machine tool that can grind two parallel end surfaces at the same time in one processing process. It can be divided into horizontal and vertical types according to its structure, and can be divided into through-type, rotary table type, and reciprocating type according to the feeding method.

[0003] Existing vertical spindle double-end surface grinders mostly use a group of upper grinding wheels and a group of lower grinding wheels to grind the upper and lower end surfaces of the workpiece simultaneously. Since the workpiece is transported between the two groups of grinding wheels by the conveyor disc, the end surface flatness is poor at the beginning, and there will be some large burrs and protrusions, which will cause greater impact wear on the edge of the grinding wheel during the input process. When it reaches the middle position of the grinding wheel, the end surface has been preliminarily ground, and the wear on the middle position of the grinding wheel is weakened. After long-term use, the wear degree of the outer wall of the grinding wheel will be much greater than the wear degree of the middle part. At this time, if the grinding wheel is directly replaced, the use cost of the grinding wheel will be greatly increased, and the middle part of the grinding wheel has not been completely worn out, which is relatively wasteful. At the same time, during the use of the grinding wheel, its service life is closely related to the running time and temperature. Long-term high-temperature grinding will greatly reduce the service life of the grinding wheel. Summary of the invention

[0004] The object of the present invention is to provide a grinding wheel dressing device for a vertical spindle double-end surface grinder, which is convenient for avoiding excessive heating and wear of the grinding wheel and thus affecting the service life, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A grinding wheel dressing device for a vertical spindle double-end surface grinder, comprising a machine body, a grinding mechanism and a switching mechanism, wherein a conveying disc is rotatably connected to the machine body, the grinding mechanism comprises a switching platform rotatably connected to the machine body, a plurality of groups of upper grinding wheels and lower grinding wheels are arranged on the switching platform, the upper grinding wheels are located on the upper side of the conveying disc, and the lower grinding wheels are located on the lower side of the conveying disc, and are used to grind the upper and lower end surfaces of the raw material by the upper grinding wheels and the lower grinding wheels when the conveying disc rotates to convey the raw material, the switching mechanism comprises a driving pipe rotatably connected to the machine body, the driving pipe passes through the conveying disc and is rotatably connected to the conveying disc, the driving pipe is provided with a switching member for driving the upper grinding wheel and the lower grinding wheel to rotate, and sensing the temperature of the upper grinding wheel and the lower grinding wheel, and driving the switching platform to rotate and switch after the temperature reaches a set value, and is used to drive the upper grinding wheel and the lower grinding wheel to rotate through the driving pipe, and the switching platform is rotated and switched by the switching member, so as to avoid excessive heating and wear of the grinding wheel, thereby affecting the service life.

[0006] Preferably, the grinding mechanism also includes guide columns fixedly mounted on the upper grinding wheel and the lower grinding wheel respectively, the outer wall of the guide column is slidably connected with a mounting ring in the vertical direction, the mounting ring is fixedly connected with a grinding ring, the guide column is fixedly connected with a first gear rotatably connected to the switching table, and the mounting ring is fixedly connected with a first spring fixedly connected to the first gear, so that when the conveyor disc rotates to transport the raw material, the upper and lower end surfaces of the raw material can be ground by the upper grinding wheel and the lower grinding wheel.

[0007] Preferably, the switching member includes a temperature-sensitive ring fixedly mounted on the outer wall of the driving tube, the outer wall of the temperature-sensitive ring is rollingly connected to the outer wall of the mounting ring, the driving tube is used to store liquid that can expand when heated, a side hole connected to the temperature-sensitive ring is provided on the side of the driving tube, the top of the driving tube is slidably connected to a lifting rod in a vertical direction, the lifting rod is prismatic, and the body is provided with a rotating member for driving the switching table to rotate at a set angle when the lifting rod moves to a set position, so as to drive the upper grinding wheel and the lower grinding wheel to rotate, sense the temperature of the upper grinding wheel and the lower grinding wheel, and drive the switching table to rotate and switch after the temperature reaches the set value.

[0008] Preferably, the rotating member includes a fixed frame fixedly mounted on the machine body, the fixed frame is rotatably connected to a rotating ring, the rotating ring is coaxially fixedly connected to a driving disk, the switching table is coaxially fixedly connected to a rotating disk, the outer wall of the rotating disk is provided with an arc groove that slidably fits with the outer wall of the driving disk, the driving disk is fixedly connected to a driving rod, the driving rod is fixedly connected to a driving block, the rotating disk is provided with a plurality of groups of driving grooves that can be slidably connected to the outer wall of the driving block, the number of the driving grooves is the same as the number of the upper grinding wheels, so as to drive the switching table to rotate to a set angle when the lifting rod moves to a set position.

[0009] Preferably, the rotating member also includes a first bevel gear ring fixedly mounted on the upper end of the lifting rod, a reducer is provided on the rotating ring, the output end of the reducer is connected to the driving disk, the input end of the reducer is fixedly connected to a second bevel gear ring capable of meshing with the first bevel gear ring, and a control member for controlling the driving disk to rotate one circle each time is provided on the driving disk, so as to facilitate driving the driving disk to rotate together with the lifting rod at a set position.

[0010] Preferably, the control member includes a connecting frame rotatably connected to the driving disk and the top of the rotating disk, the connecting frame is provided with a device groove, a driving shaft is movably connected in the device groove, a guide block is fixedly connected to the outer wall of the driving shaft, and a vertical groove and a threaded groove that can be slidably connected to the outer wall of the guide block are provided in the device groove, the upper and lower ends of the vertical groove are respectively connected to the upper and lower ends of the threaded groove, so as to facilitate controlling the driving disk to rotate one circle each time.

[0011] Preferably, the control member also includes a first sliding block fixedly installed at the bottom of the driving shaft, the bottom of the first sliding block is fixedly connected to a second spring, the bottom of the second spring is fixedly connected to a second sliding block, the first sliding block and the second sliding block are both prismatic, the first sliding block and the second sliding block pass through the driving rod and the driving disk, and are slidably connected to the driving rod and the driving disk in a vertical direction.

[0012] Preferably, the switching mechanism also includes two groups of second gears fixedly mounted on the outer wall of the driving tube, the two groups of second gears can respectively mesh with the first gears on the upper and lower sides, the outer wall of the conveying disc is fixedly connected with an outer gear ring, a third gear meshing with the outer gear ring is rotatably connected to the machine body, the outer wall of the driving tube is transmission-connected with a transmission belt transmission-connected to the pulley on the third gear, so as to facilitate the upper grinding wheel, the lower grinding wheel and the conveying disc to rotate through the driving tube.

[0013] Preferably, a driving motor is fixedly connected in the body, and the output end of the driving motor is coaxially fixedly connected to the bottom end of the driving tube, so as to drive the driving tube to rotate.

[0014] Preferably, the outer edge of the grinding ring is designed as a slope, which is convenient for guiding workpieces of different heights between the upper grinding wheel and the lower grinding wheel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a grinding wheel dressing device for a vertical spindle double-end surface grinder, which solves the problem that it is difficult to monitor the use status of the grinding wheel when the grinding wheel dressing device of the existing vertical spindle double-end surface grinder is used, which causes the grinding wheel to heat up and seriously affects the service life. When the conveyor disc rotates to convey the raw material, the upper and lower end surfaces of the raw material are grinded by the upper grinding wheel and the lower grinding wheel, and the upper and lower grinding wheels are driven to rotate by the switching mechanism. The temperature of the upper and lower grinding wheels is sensed by the switching part, and the switching table is driven to rotate and switch after the temperature reaches the set value, so as to avoid the grinding wheel temperature being too high to affect the grinding efficiency and service life. At the same time, the switching process will not affect the continuous processing and grinding operation of the component, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural cross-sectional view of the rotating part of the present invention; Figure 3 for Figure 2 A magnified image of area A; Figure 4 It is a partial structural cross-sectional view of the switching mechanism of the present invention; Figure 5 for Figure 4 Enlarged view of area B; Figure 6 It is a schematic diagram of the local structure of the switching mechanism of the present invention; Figure 7 for Figure 6 Enlarged view of area C in the middle; Figure 8 It is a schematic diagram of the local structure of the grinding mechanism of the present invention; Fig. 9 It is a schematic diagram of the local structure of the upper grinding wheel of the present invention; Fig.10 It is a partial structural sectional view of the grinding mechanism of the present invention.

[0017] In the figure: 1-body; 2-conveying plate; 3-grinding mechanism; 4-switching table; 5-upper grinding wheel; 6-lower grinding wheel; 7-switching mechanism; 8-driving pipe; 9-switching member; 10-guide column; 11-mounting ring; 12-grinding ring; 13-first gear; 14-first spring; 15-temperature sensing ring; 16-side hole; 17-lifting rod; 18-rotating member; 19-fixed frame; 20-rotating ring; 21-driving plate; 22-rotating plate; 23-arc groove; 24-driving rod; 25-driving block; 26-driving groove; 27-first helical gear ring; 28-reducer; 29-second helical gear ring; 30-control member; 31-connecting frame; 32-device groove; 33-driving shaft; 34-guide block; 35-vertical groove; 36-thread groove; 37-first sliding block; 38-second spring; 39-second sliding block; 40-second gear; 41-external gear ring; 42-third gear; 43-transmission belt; 44-driving motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 10The present invention provides a technical solution: a grinding wheel dressing device for a vertical spindle double-end surface grinder, comprising a machine body 1, a grinding mechanism 3 and a switching mechanism 7, wherein a conveying disc 2 is rotatably connected to the machine body 1, the grinding mechanism 3 comprises a switching platform 4 rotatably connected to the machine body 1, and a plurality of groups of upper grinding wheels 5 and lower grinding wheels 6 are arranged on the switching platform 4, wherein the upper grinding wheel 5 is located on the upper side of the conveying disc 2, and the lower grinding wheel 6 is located on the lower side of the conveying disc 2, and is used for grinding the upper and lower end surfaces of the raw material by the upper grinding wheel 5 and the lower grinding wheel 6 when the conveying disc 2 rotates to convey the raw material.

[0020] The switching mechanism 7 includes a driving tube 8 rotatably connected to the body 1. The driving tube 8 passes through the conveying disc 2 and is rotatably connected to the conveying disc 2. A driving motor 44 is fixedly connected inside the body 1. The model of the driving motor 44 is preferably Y80M1-2. The output end of the driving motor 44 is coaxially fixedly connected to the bottom end of the driving tube 8. The driving tube 8 is provided with a switching member 9 for driving the upper grinding wheel 5 and the lower grinding wheel 6 to rotate, and sensing the temperature of the upper grinding wheel 5 and the lower grinding wheel 6. After the temperature reaches a set value, the switching table 4 is driven to rotate and switch. The switching member 9 is used to drive the upper grinding wheel 5 and the lower grinding wheel 6 to rotate through the driving tube 8, and the switching table 4 is rotationally switched through the switching member 9.

[0021] The grinding mechanism 3 also includes a guide column 10 fixedly mounted on the upper grinding wheel 5 and the lower grinding wheel 6 respectively, the outer wall of the guide column 10 is slidably connected with a mounting ring 11 in the vertical direction, a grinding ring 12 is fixedly connected to the mounting ring 11, and the outer edge of the grinding ring 12 is designed as a slope, a first gear 13 rotatably connected to the switching table 4 is fixedly connected to the guide column 10, and a first spring 14 fixedly connected to the first gear 13 is fixedly connected to the mounting ring 11.

[0022] The switching member 9 includes a temperature-sensitive ring 15 fixedly mounted on the outer wall of the driving tube 8. The outer wall of the temperature-sensitive ring 15 is rollingly connected to the outer wall of the mounting ring 11. The driving tube 8 is used to store liquid that can expand due to heat. A side hole 16 connected to the temperature-sensitive ring 15 is provided on the side of the driving tube 8. The top of the driving tube 8 is slidably connected to a lifting rod 17 in a vertical direction. The lifting rod 17 is prismatic. A rotating member 18 is provided on the body 1 for driving the switching platform 4 to rotate to a set angle when the lifting rod 17 moves to a set position.

[0023] The rotating member 18 includes a fixed frame 19 fixedly mounted on the machine body 1, a rotating ring 20 is rotatably connected to the fixed frame 19, a driving disk 21 is coaxially fixedly connected to the rotating ring 20, a rotating disk 22 is coaxially fixedly connected to the switching table 4, an outer wall of the rotating disk 22 is provided with an arc groove 23 that slides with the outer wall of the driving disk 21, a driving rod 24 is fixedly connected to the driving disk 21, a driving block 25 is fixedly connected to the driving rod 24, and a plurality of groups of driving grooves 26 that can be slidably connected to the outer wall of the driving block 25 are provided on the rotating disk 22, and the number of the driving grooves 26 is the same as the number of the upper grinding wheel 5.

[0024] The rotating member 18 also includes a first helical gear ring 27 fixedly mounted on the upper end of the lifting rod 17, a reducer 28 is provided on the rotating ring 20, the output end of the reducer 28 is connected to the driving disk 21, and the input end of the reducer 28 is fixedly connected to a second helical gear ring 29 capable of meshing with the first helical gear ring 27, and a control member 30 is provided on the driving disk 21 for controlling the driving disk 21 to rotate one circle each time.

[0025] The control member 30 includes a connecting frame 31 rotatably connected to the top of the driving disk 21 and the rotating disk 22, and a mounting groove 32 is provided on the connecting frame 31. A driving shaft 33 is movably connected in the mounting groove 32, and a guide block 34 is fixedly connected to the outer wall of the driving shaft 33. A vertical groove 35 and a threaded groove 36 that can be slidably connected to the outer wall of the guide block 34 are provided in the mounting groove 32, and the upper and lower ends of the vertical groove 35 are respectively connected to the upper and lower ends of the threaded groove 36.

[0026] The control member 30 also includes a first sliding block 37 fixedly installed at the bottom of the driving shaft 33, the bottom of the first sliding block 37 is fixedly connected to a second spring 38, the bottom of the second spring 38 is fixedly connected to a second sliding block 39, the first sliding block 37 and the second sliding block 39 are both prismatic, the first sliding block 37 and the second sliding block 39 pass through the driving rod 24 and the driving disk 21, and are slidably connected to the driving rod 24 and the driving disk 21 along the vertical direction.

[0027] The switching mechanism 7 also includes two groups of second gears 40 fixedly mounted on the outer wall of the driving tube 8, and the two groups of second gears 40 can respectively mesh with the first gears 13 on the upper and lower sides. The outer wall of the conveying disc 2 is fixedly connected with an outer gear ring 41, and the body 1 is rotatably connected with a third gear 42 meshing with the outer gear ring 41, and the outer wall of the driving tube 8 is transmission-connected with a transmission belt 43 that is transmission-connected to the pulley on the third gear 42.

[0028] In this embodiment, the driving motor 44 is used to drive the driving tube 8 to rotate, and the driving tube 8 drives the transmission belt 43 so that the third gear 42 drives the outer gear ring 41 and the conveying disc 2 to rotate, so that the workpieces in the conveying disc 2 can be transported one by one to the corresponding upper grinding wheel 5 and lower grinding wheel 6 for double-end surface grinding. The pitch circle radius of the third gear 42 is much smaller than the pitch circle radius of the outer gear ring 41, so that when the driving tube 8 rotates at a high speed, the rotation speed of the outer gear ring 41 and the conveying disc 2 is relatively small, thereby ensuring the stable transportation of materials.

[0029] The rotation of the driving tube 8 drives the second gear 40 to rotate the first gear 13, and the first gear 13 drives the guide column 10 to make the upper grinding wheel 5 and the lower grinding wheel 6 rotate together with the mounting ring 11, and the mounting ring 11 drives the grinding ring 12 to rotate. When the workpiece is transported to the slope that conflicts with the grinding ring 12, the grinding ring 12 will be pushed to the upper and lower sides first, compressing the first spring 14, and as the grinding ring 12 rotates, the protrusion of the workpiece is preliminarily ground, and then the workpiece is transmitted between the upper grinding wheel 5 and the lower grinding wheel 6. At this time, the two ends of the workpiece are relatively flat, which reduces the wear on the upper grinding wheel 5 and the lower grinding wheel 6, and reduces the replacement frequency. It is only necessary to replace the grinding ring 12 that has stopped rotating and install it on the mounting ring 11.

[0030] When the mounting ring 11 rotates, the heat on the grinding ring 12 will be transferred to the temperature sensing ring 15, so that the heat-expandable liquid (such as mercury) inside the temperature sensing ring 15 will expand due to the heat, pushing the lifting rod 17 to move upward, gradually pushing the second sliding block to move upward to compress the second spring 38, pushing the first sliding block 37 to move upward, and the driving shaft 33 drives the guide block 34 to move upward in the vertical groove 35, gradually reaching the position where the top of the vertical groove 35 is connected with the thread groove 36. At this time, the first bevel gear ring 27 is meshed with the second bevel gear ring 29, driving the reducer 28 to drive the driving disk 21 to rotate one circle, and the driving disk 21 drives the first sliding block 37 to make the driving shaft 33 rotate one circle. After the guide block 34 rotates one circle in the thread groove 36 and reaches the bottom end position of the vertical groove 35, it cannot continue to rotate. At this time, the downward displacement of the driving shaft 33 just pushes the top end of the lifting rod 17 downward, so that the first bevel gear ring 27 is released from the meshing with the second bevel gear ring 29, and the driving state can be released.

[0031] During the process of the driving disc 21 rotating one circle, the driving rod 24 and the driving block 25 are driven to rotate. During the sliding process of the driving block 25 in the driving groove 26, the rotating disc 22 is driven to rotate 120°, and the positions of the upper grinding wheel 5 and the lower grinding wheel 6 are switched, so that a group of adjacent upper grinding wheels 5 and lower grinding wheels 6 are rotated to the upper and lower sides of the conveying disc 2. Since the rotation direction of the first gear 13 is the same as the rotation and switching direction of the switching table 4, the first gear 13 and the second gear 40 will not be unable to mesh or get stuck. During the switching process, the temperature of the mounting ring 11 that the temperature sensing ring 15 is in contact with is relatively low, so that the liquid in the driving tube 8 cools down and shrinks, driving the lifting rod 17 to move downward, and the situation of continuing to drive the first bevel gear ring 27 and the second bevel gear ring 29 to mesh and rotate can be avoided. In this way, the grinding wheel temperature in the grinding state can be automatically sensed, and automatic switching can be achieved, so as to avoid the situation that the upper grinding wheel 5, the lower grinding wheel 6 and the grinding ring 12 are too high in temperature and affect the service life. At the same time, the grinding ring 12 in the non-rotating state can be easily replaced without affecting the continuous grinding efficiency of the workpiece.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding wheel dressing device for a vertical spindle double-end surface grinder, characterized in that: include: A machine body (1), a conveying disc (2) being rotatably connected to the machine body (1); Also includes: A grinding mechanism (3), the grinding mechanism (3) comprising a switching table (4) rotatably connected to the machine body (1), the switching table (4) being provided with a plurality of groups of upper grinding wheels (5) and lower grinding wheels (6), the upper grinding wheels (5) being located on the upper side of the conveying disc (2), and the lower grinding wheels (6) being located on the lower side of the conveying disc (2), and being used for grinding the upper and lower end surfaces of the raw material by means of the upper grinding wheels (5) and the lower grinding wheels (6) when the conveying disc (2) rotates to convey the raw material; A switching mechanism (7), the switching mechanism (7) comprising a driving tube (8) rotatably connected to the machine body (1), the driving tube (8) passing through the conveying disc (2) and rotatably connected to the conveying disc (2), the driving tube (8) being provided with a switching member (9) for driving the upper grinding wheel (5) and the lower grinding wheel (6) to rotate, sensing the temperature of the upper grinding wheel (5) and the lower grinding wheel (6), and driving the switching platform (4) to rotate and switch after the temperature reaches a set value, the switching mechanism (7) comprising driving the upper grinding wheel (5) and the lower grinding wheel (6) to rotate through the driving tube (8), and rotating and switching the switching platform (4) through the switching member (9).

2. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 1, characterized in that: The grinding mechanism (3) further comprises a guide column (10) fixedly mounted on the upper grinding wheel (5) and the lower grinding wheel (6), respectively; the outer wall of the guide column (10) is slidably connected to a mounting ring (11) in a vertical direction; a grinding ring (12) is fixedly connected to the mounting ring (11); a first gear (13) rotatably connected to the switching table (4) is fixedly connected to the guide column (10); and a first spring (14) fixedly connected to the mounting ring (11) is fixedly connected to the first gear (13).

3. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 2, characterized in that: The switching member (9) comprises a temperature-sensitive ring (15) fixedly mounted on the outer wall of the driving tube (8); the outer wall of the temperature-sensitive ring (15) is rollingly connected to the outer wall of the mounting ring (11); the driving tube (8) is used to store a liquid that can expand when heated; a side hole (16) connected to the temperature-sensitive ring (15) is provided on the side of the driving tube (8); a lifting rod (17) is slidably connected to the top of the driving tube (8) in a vertical direction; the lifting rod (17) is prismatic; and a rotating member (18) is provided on the machine body (1) for driving the switching table (4) to rotate to a set angle when the lifting rod (17) moves to a set position.

4. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 3, characterized in that: The rotating member (18) comprises a fixed frame (19) fixedly mounted on the machine body (1); a rotating ring (20) is rotatably connected to the fixed frame (19); a driving disk (21) is coaxially fixedly connected to the rotating ring (20); a rotating disk (22) is coaxially fixedly connected to the switching table (4); an arc groove (23) is provided on the outer wall of the rotating disk (22) and is slidably fitted with the outer wall of the driving disk (21); a driving rod (24) is fixedly connected to the driving disk (21); a driving block (25) is fixedly connected to the driving rod (24); a plurality of driving grooves (26) are provided on the rotating disk (22) and are slidably connected to the outer wall of the driving block (25); the number of the driving grooves (26) is the same as the number of the upper grinding wheel (5).

5. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 4, characterized in that: The rotating member (18) further comprises a first helical gear ring (27) fixedly mounted on the upper end of the lifting rod (17); a reducer (28) is provided on the rotating ring (20); an output end of the reducer (28) is connected to the driving disk (21); an input end of the reducer (28) is fixedly connected to a second helical gear ring (29) capable of meshing with the first helical gear ring (27); and a control member (30) for controlling the driving disk (21) to rotate one circle each time is provided on the driving disk (21).

6. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 5, characterized in that: The control member (30) comprises a connecting frame (31) rotatably connected to the top of the driving disk (21) and the rotating disk (22); a device groove (32) is provided on the connecting frame (31); a driving shaft (33) is movably connected in the device groove (32); a guide block (34) is fixedly connected to the outer wall of the driving shaft (33); a vertical groove (35) and a thread groove (36) are provided in the device groove (32) and can be slidably connected to the outer wall of the guide block (34); upper and lower ends of the vertical groove (35) are respectively connected to upper and lower ends of the thread groove (36).

7. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 6, characterized in that: The control member (30) further comprises a first sliding block (37) fixedly mounted on the bottom of the driving shaft (33); a second spring (38) is fixedly connected to the bottom of the first sliding block (37); a second sliding block (39) is fixedly connected to the bottom of the second spring (38); the first sliding block (37) and the second sliding block (39) are both prism-shaped; the first sliding block (37) and the second sliding block (39) penetrate the driving rod (24) and the driving disk (21), and are slidably connected to the driving rod (24) and the driving disk (21) in a vertical direction.

8. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 2, characterized in that: The switching mechanism (7) further comprises two groups of second gears (40) fixedly mounted on the outer wall of the driving tube (8), the two groups of second gears (40) being respectively capable of meshing with the first gears (13) on the upper and lower sides; an outer gear ring (41) is fixedly connected to the outer wall of the conveying disc (2); a third gear (42) meshing with the outer gear ring (41) is rotatably connected to the body (1); and a transmission belt (43) which is transmission-connected to the outer wall of the driving tube (8) is transmission-connected to the pulley on the third gear (42).

9. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 1, characterized in that: A driving motor (44) is fixedly connected inside the machine body (1), and an output end of the driving motor (44) is coaxially fixedly connected to the bottom end of the driving tube (8).

10. The grinding wheel dressing device for a vertical spindle double-end surface grinder according to claim 2, characterized in that: The outer edge of the grinding ring (12) is designed as a slope surface.

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