CN210307138U

CN210307138U - Grinding machine

Info

Publication number: CN210307138U
Application number: CN201920807083.3U
Authority: CN
Inventors: 高思帅; 陈琪; 曹光福; 李海建
Original assignee: Zhejiang Jack Machine Tool Co ltd
Current assignee: Zhejiang Jack Machine Tool Co ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-04-14
Anticipated expiration: 2029-05-30

Abstract

The utility model belongs to the technical field of machining equipment, in particular to a grinding machine; the automatic grinding paste adding device is longitudinally arranged, and the action of the automatic grinding paste adding device is controlled by a controller; the utility model discloses the automatic grinding paste that sets up installs additional the device can add the grinding paste in the lathe course of working automatically, and degree of automation is high, reduces down time, has improved work efficiency greatly, need not the manual work and adds the grinding paste, operates safe and reliable more, helps the realization of machining assembly line full automatization, excellent in use effect.

Description

Grinding machine

The technical field is as follows:

the utility model belongs to the technical field of machining equipment, refer in particular to a grinding machine.

Background art:

when a grinding machine is used for processing some parts (such as crankshafts), grinding paste needs to be added before grinding. In the conventional addition method, after a workpiece is clamped, a grinding paste is manually added to a machining part. The mode has the defects of low automation degree, high working efficiency, high labor cost and the like.

The invention content is as follows:

the utility model aims at providing a grinding machine that can add the abrasive paste automatically.

The utility model discloses a realize like this:

the utility model provides a grinding machine, includes the lathe bed, transversely is provided with the slip table on the lathe bed, is provided with headstock and tailstock on the slip table, vertically is provided with the emery wheel mechanism on the lathe bed of slip table rear side, is provided with the automatic grinding paste that can install the grinding paste additional installation for the work piece at any time on the lathe bed of emery wheel mechanism one side, automatic grinding paste additional installation device is along vertically setting up, the action that automatic grinding paste installed the device additional is controlled by the controller.

In foretell grinding machine, automatic lapping paste installs device additional includes the cylinder, the cylinder sets firmly on the baseplane of well connecting plate, the last plane of well connecting plate is provided with the first guide rail parallel with the telescopic link direction of cylinder, sliding connection has the upper junction plate on first guide rail, the outer end of the telescopic link of cylinder passes through cylinder connecting plate and upper junction plate fixed connection, syringe and first actuating mechanism have set gradually on the upper junction plate, the rear end and the first actuating mechanism of the push rod of syringe are connected, first actuating mechanism can promote the push rod, the axis of syringe is collinear or parallel with first actuating mechanism's axis, and the axis of syringe is parallel with the telescopic link direction of first actuating mechanism and cylinder, the cylinder is fixed under on the connecting plate directly or through the cylinder support, the lower connecting plate sets firmly in the frame.

In the grinding machine, the first driving mechanism comprises a screw rod and a first motor, the first motor is arranged on a second guide rail in a sliding mode, the second guide rail is fixedly arranged on the upper connecting plate, one end of the screw rod is connected with a rotating shaft of the first motor through a coupler, the other end of the screw rod is abutted to the push rod, the second guide rail is arranged in parallel with the first guide rail, a threaded supporting seat is connected to the screw rod in a threaded mode, and the threaded supporting seat is fixedly arranged on the upper connecting plate.

In the grinding machine, the screw rod is supported on the upper connecting plate through the embedded retainer, and the injector is supported on the upper connecting plate through the base.

In foretell grinding machine, be provided with the circular arc trimmer who carries out the repairment to the emery wheel on the slip table between headstock and the tailstock, circular arc trimmer includes the chassis, vertically be provided with the recess on the chassis, be provided with the bottom plate on the last plane on chassis, the bottom plate covers the one end of recess, be provided with the second motor on the bottom plate, the pivot of second motor is passed the bottom plate and is located the recess, another end frame on chassis is equipped with the support, the upper end and the lower extreme of bow frame set up respectively on support and chassis, and the lower extreme of bow frame is located the other end of recess, be connected through the second actuating mechanism between the pivot of bow frame and second motor, vertically be provided with the diamond pen on the bow frame, and the pointed end of diamond pen stretches out outside the bow frame, the diamond pen rotates along with the bow frame, the bow frame drives through second motor, second actuating mechanism and controls reciprocal rotation.

In the grinding machine, the bracket comprises a left upright and a right upright which are arranged at the left side and the right side of the bow frame, the lower ends of the left upright and the right upright are fixedly connected to the chassis, the upper end of the left upright and the right upright are fixedly connected to the left end and the right end of the cross beam plate, and the bow frame is rotatably arranged between the cross beam plate and the chassis.

In the grinding machine, the crossbeam plate and the chassis are respectively provided with an upper positioning tip and a lower positioning tip, the upper end surface and the lower end surface of the bow frame are respectively provided with an upper conical hole and a lower conical hole, the tip of the upper positioning tip is inserted into the upper conical hole, the tip of the lower positioning tip is inserted into the lower conical hole, and the bow frame is rotatably connected between the crossbeam plate and the chassis through the upper positioning tip and the lower positioning tip.

In the grinding machine, the bow frame is provided with a diamond pen mounting hole, the tip of the diamond pen extends out of the front end of the diamond pen mounting hole, the bow frame at the rear end of the diamond pen mounting hole is provided with a lug, the lug is fixed on the bow frame through a screw, and when the bow frame rotates left and right, the lug abuts against the left stand column or the right stand column to limit the position.

In the grinding machine, the second driving mechanism comprises a first belt pulley arranged on a rotating shaft of the second motor and a second belt pulley arranged at the lower end of the bow frame, and the first belt pulley and the second belt pulley are both positioned in the groove and are in transmission connection through a belt.

In the above grinding machine, a vertical grinding device is fixedly arranged on the upper plane of the headstock, and the vertical grinding device is fixedly arranged on the upper plane of the headstock through the upright column and the cantilever.

Compared with the prior art, the utility model outstanding advantage is:

1. the utility model discloses the automatic grinding paste that sets up installs additional the device can add the grinding paste in the lathe course of working automatically, and degree of automation is high, reduces down time, has improved work efficiency greatly, need not the manual work and adds the grinding paste, operates safe and reliable more, helps the realization of machining assembly line full automatization, excellent in use effect.

2. The utility model discloses a circular arc trimmer drives diamond pen reciprocating rotation back and forth by the motor, and the ration of cooperation emery wheel is fed, makes diamond pen atress even on the emery wheel, and the surface finish of the machined part of the emery wheel processing after guaranteeing to maintain is high, whole automatic control, and degree of automation is high, has reduced the human cost, has improved and has maintained the precision.

3. The utility model discloses a vertical grinder sets up on the headstock, and compact structure, occupation space are little, can accomplish the processing of twice process under the condition of a clamping of work piece with the emery wheel cooperation, have improved machining efficiency.

Description of the drawings:

fig. 1 is a front perspective view of the present invention;

fig. 2 is a back perspective view of the present invention;

FIG. 3 is a schematic view of the automatic slurry charging apparatus of the present invention;

FIG. 4 is an enlarged schematic view of section A of FIG. 3;

fig. 5 is one of the schematic diagrams of the arc trimmer of the present invention;

fig. 6 is a second schematic view of the arc trimmer of the present invention;

fig. 7 is a schematic view of a bottom plate of the arc trimmer of the present invention;

fig. 8 is a schematic view of the arc dresser of the present invention with the rear side facing outward;

fig. 9 is a sectional view a-a of fig. 8.

In the figure: 1. a bed body; 2. a slide rail; 3. a sliding table; 4. a head frame; 5. a tailstock; 6. a cylinder; 7. a middle connecting plate; 8. a first guide rail; 9. an upper connecting plate; 10. a cylinder connecting plate; 11. an injector; 12. a push rod; 13. a cylinder support; 14. a lower connecting plate; 15. an upper cross beam; 16. a lower cross beam; 17. a column; 18. a corner fitting; 19. cushion blocks; 20. a guard plate; 21. a screw rod; 22. a first motor; 23. a second guide rail; 24. a threaded support seat; 25. a motor bracket; 26. an embedded retainer; 27. a base; 28. a right connector; 29. a left connector; 30. a cylindrical pin; 31. a chassis; 32. a groove; 33. a base plate; 34. a second motor; 35. a bow frame; 36. a diamond pen; 37. a left upright post; 38. a right upright post; 39. a beam plate; 40. an upper positioning centre; 41. a lower positioning center; 42. a lug; 43. a first belt pulley; 44. a second belt pulley; 45. a strip-shaped hole; 46. a vertical grinding device; 47. a column; 48. a cantilever; 49. and (4) protruding.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 9:

a grinding machine comprises a machine body 1, a sliding table 3 is transversely arranged on the machine body 1 through a sliding rail 2, a headstock 4 and a tailstock 5 are arranged on the sliding table 3, and the sliding table 3 can reciprocate along the sliding rail 2 under the driving of a screw rod and a motor. A grinding wheel mechanism is longitudinally arranged on the machine body 1 at the rear side of the sliding table 3 and comprises a grinding wheel and a motor for driving the grinding wheel to rotate. An automatic grinding paste adding device capable of adding grinding paste to a workpiece at any time is arranged on the lathe bed 1 on one side of the grinding wheel mechanism, the automatic grinding paste adding device is longitudinally arranged, the action of the automatic grinding paste adding device is controlled by a controller, and the specific adding time is determined according to actual production.

As shown in fig. 3, the automatic polishing paste adding device comprises a cylinder 6, the cylinder 6 is fixedly arranged on the bottom plane of a middle connecting plate 7, a first guide rail 8 parallel to the telescopic rod of the cylinder 6 is arranged on the upper plane of the middle connecting plate 7, an upper connecting plate 9 is connected on the first guide rail 8 in a sliding manner, the outer end of the telescopic rod of the cylinder 6 is fixedly connected with the upper connecting plate 9 through a cylinder connecting plate 10, an injector 11 and a first driving mechanism are sequentially arranged on the upper connecting plate 9, the rear end of a push rod 12 of the injector 11 is connected with the first driving mechanism, the first driving mechanism can push the push rod 12, the axis of the injector 11 is coaxial or parallel with the axis of the first driving mechanism, the axis of the injector 11 is parallel to the telescopic rod of the cylinder 6, the cylinder 6 is fixed on a lower connecting plate 14 directly or through a cylinder bracket 13, the lower connecting plate 14 is fixedly arranged on the frame.

The frame comprises an upper beam 15 and a lower beam 16, wherein the two ends of the upper beam 15 and the lower beam 16 are connected through an upright post 17, and an angle piece 18 is arranged between the upper beam 15 and the upright post 17 and between the lower beam 16 and the upright post 17. The upper cross beam 15, the lower cross beam 16 and the upright post 17 are all made of aluminum profiles, and assembly is facilitated.

The utility model discloses a corresponding position is provided with cushion 19 on the lathe bed 1, and the frame is fixed on cushion 19.

In order to prevent that the flying chips that produces in the grinding machine course of working from piling up on first guide rail 8, influence the gliding flexibility of slider on first guide rail 8, the utility model discloses correspond the position and be provided with the backplate 20 that can shelter from first guide rail 8, slider on upper junction plate 9.

The utility model discloses an automatic grinding paste installs device additional is close to the position that needs install the grinding paste additional through the injection port that 6 cylinders drive syringe 11, and first actuating mechanism drive push rod 12 is extruded the grinding paste in 11 syringes toward the one end of injection port and is realized installing additional of grinding paste, and whole process is reached automatic purpose of installing additional by controller control cylinder 6 and first actuating mechanism's action, and degree of automation is high, has improved work efficiency greatly, safe and reliable. In addition, the sewing cylinder 6 of the automatic grinding paste adding device can be replaced by an electric push rod, an oil cylinder or a motor screw rod structure to achieve the same effect.

Further, the first driving mechanism comprises a screw rod 21 and a first motor 22, the first motor 22 is slidably disposed on a second guide rail 23, the second guide rail 23 is fixedly disposed on the upper connection plate 9, one end of the screw rod 21 is connected with a rotating shaft of the first motor 22 through a coupler, the other end of the screw rod is abutted to the push rod 12, the second guide rail 23 is parallel to the first guide rail 8, a thread support seat 24 is screwed on the screw rod 21, the thread support seat 24 is fixedly disposed on the upper connection plate 9, the first motor 22 is fixedly disposed on a motor support 25, and the motor support 25 is slidably connected to the second guide rail 23 through a sliding block. Because the screw thread supporting seat 24 is fixedly arranged on the upper connecting plate 9, the first motor 22 slides along the second guide rail 23 through the sliding block, and then the front end of the screw rod 21 is driven to act on the push rod 12 to extrude the grinding paste in the injector 11.

Further, the screw 21 is supported on the upper connecting plate 9 through an embedded retainer 26, and the injector 11 is supported on the upper connecting plate 9 through a base 27, so that the structure is more stable, and the axis of the screw 21 is ensured to be parallel to the axis of the push rod 11.

The shaft coupling comprises a right connecting piece 28 fixedly arranged on the rotating shaft of the first motor 22 and a left connecting piece 29 fixedly arranged at one end of the screw rod 21, and the left connecting piece 29 and the right connecting piece 28 are fixedly connected through more than two cylindrical pins 30 distributed circumferentially.

The coupler can also comprise a right connecting piece fixedly arranged on a motor rotating shaft and a left connecting piece fixedly arranged at one end of the screw rod 21, a plurality of convex teeth arranged at intervals are circumferentially distributed at one end of the left connecting piece, slots are formed between the convex teeth and the convex teeth, a plurality of convex teeth arranged at intervals are also circumferentially distributed at one end of the right connecting piece, slots are formed between the convex teeth and the convex teeth, and the convex teeth and the slots on the left connecting piece and the right connecting piece are mutually spliced.

The utility model discloses a first actuating mechanism can also replace with the cylinder, also can reach the same effect.

The automatic polishing paste loading device may have the following structure in addition to the above structure: the polishing paste pump is used for pumping polishing paste to the surface of a workpiece, and the polishing paste delivery pipe is arranged on one side of the surface of the workpiece.

The utility model discloses be provided with the circular arc trimmer that carries out the repairment to the emery wheel on the slip table 3 between headstock 4 and the tailstock 5, the action of circular arc trimmer is controlled by the controller. The arc trimmer comprises a chassis 31, a groove 32 is longitudinally formed in the chassis 31, a bottom plate 33 is arranged on the upper plane of the chassis 31, the bottom plate 33 covers one end of the groove 32, a second motor 34 is arranged on the bottom plate 33, a rotating shaft of the second motor 34 penetrates through the bottom plate 33 and is located in the groove 32, a support is erected at the other end of the chassis 31, the upper end and the lower end of an arch 35 are respectively arranged on the support and the chassis 31, the lower end of the arch 35 is located in the other end of the groove 32, the arch 35 is connected with the rotating shaft of the second motor 34 through a second driving mechanism, a diamond pen 36 is longitudinally arranged on the arch 35, the tip of the diamond pen 36 extends out of the arch 35, the diamond pen 36 rotates along with the arch 35, and the arch 35 is driven by the second motor 34 and the second driving mechanism to rotate in a left-right reciprocating mode.

In order to realize the positioning of the bottom plate 33 in the left-right direction, the bottom plane of the bottom plate 33 is provided with a protrusion 49 matched with the shape of the groove 32, and the protrusion 49 is inserted in the groove 32.

Further, the bracket comprises a left upright column 37 and a right upright column 38 which are arranged on the left side and the right side of the bow frame 35, the lower ends of the left upright column 37 and the right upright column 38 are fixedly arranged on the chassis 32, the upper ends of the left upright column 37 and the right upright column 38 are fixedly connected with the left end and the right end of the cross beam plate 39, and the bow frame 35 is rotatably arranged between the cross beam plate 39 and the chassis 31.

In order to install the bow frame 35, an upper positioning center 40 and a lower positioning center 41 are respectively and fixedly arranged on the cross beam plate 39 and the chassis 31, an upper conical hole and a lower conical hole are respectively arranged on the upper end surface and the lower end surface of the bow frame 35, the tip of the upper positioning center 40 is inserted into the upper conical hole, the tip of the lower positioning center 41 is inserted into the lower conical hole, and the bow frame 35 is rotatably connected between the cross beam plate 39 and the chassis 31 through the upper positioning center 40 and the lower positioning center 41. Of course, the upper and lower ends of the bow 35 may be rotatably mounted on the beam plate 39 and the chassis 31 by bearings.

The utility model discloses be provided with buddha's warrior attendant pen mounting hole on bow 35, the pointed end of buddha's warrior attendant pen 36 is provided with lug 42 outside stretching out the front end of buddha's warrior attendant pen mounting hole on bow 35 of buddha's warrior attendant pen mounting hole rear end, lug 42 passes through the fix with screw on bow 35, and the rear end of buddha's warrior attendant pen 36 stretches into in the lug 42. The diamond pen 36 is fixedly connected to the yoke 35 by radially arranged screws. When the bow 35 is rotated left and right, the lug 42 abuts against the left upright 37 or the right upright 38 to limit the position. Due to the inertia during rotation, the bow 35 can be ensured to rotate within a specified angle range through the limiting effect between the left upright 37 and the right upright 38 of the lug 42. Therefore, the left upright column 37 and the right upright column 38 have the supporting and limiting effects at the same time.

In order to improve the stability of the installation, the surface of the bow 35 on which the lug 42 is installed is required to be a plane.

Second actuating mechanism is including setting up pulley 43 in the pivot of second motor 34 and setting up pulley two 44 at the lower extreme of bow 35, and pulley 43 all is located recess 32 with pulley two 44, and connects through belt drive. Because the phenomenon of lax can appear after the belt moves a period, the utility model discloses be provided with a plurality of bar holes 45 on bottom plate 33, the major axis and belt pulley 43 of bar hole 45, the central line between the belt pulley 44 is parallel. The position fine adjustment of the second motor 34 and the first belt pulley 43 is realized through the strip-shaped holes 45, the purpose of tensioning the belt is achieved, and the service life of the belt is prolonged.

The second driving mechanism can also be replaced by a chain transmission mechanism and a gear transmission mechanism.

The arc dresser dresses an arc surface, and the dressed grinding wheel can machine a part of a spherical surface (the surface of a sphere with two truncated ends, such as the sphere part on a crankshaft).

The trimming process is as follows: the chassis 31 is fixed to the slide table 3. The tip of the diamond pen 36 is arranged towards the grinding wheel, and after the grinding wheel is fed to a certain position each time, the controller controls the second motor 34 to work, so that the diamond pen 36 is driven to rotate back and forth within the range of 170 degrees, and meanwhile, the grinding wheel is driven to rotate by the motor until an inwards concave arc surface is finished.

The utility model discloses the last plane of headstock 4 has set firmly vertical grinder 46, vertical grinder 46 sets firmly the last plane at headstock 4 through stand 47 and cantilever 48. The operation of the vertical polishing apparatus 46 is controlled by a controller.

The vertical grinding device 46 is arranged on the headstock 4, the structure is compact, the occupied space is small, the vertical grinding device 46 and the grinding wheel mechanism can be used for processing multiple parts after a workpiece is clamped once, and the processing efficiency is improved. The vertical grinding device 46 is commercially available, and the structure thereof will not be described in detail.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and "first", "second", etc. are used for convenience of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content, and the scope of the present invention may be considered to be implemented.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a grinding machine, includes lathe bed (1), transversely is provided with slip table (3) on lathe bed (1), is provided with headstock (4) and tailstock (5) on slip table (3), vertically is provided with emery wheel mechanism, its characterized in that on lathe bed (1) of slip table (3) rear side: an automatic grinding paste adding device capable of adding grinding paste to a workpiece at any time is arranged on the lathe bed (1) on one side of the grinding wheel mechanism, the automatic grinding paste adding device is arranged along the longitudinal direction, and the action of the automatic grinding paste adding device is controlled by a controller.

2. A grinding machine as claimed in claim 1 in which: the automatic grinding paste adding device comprises an air cylinder (6), the air cylinder (6) is fixedly arranged on the bottom plane of a middle connecting plate (7), a first guide rail (8) parallel to the telescopic rod stretching direction of the air cylinder (6) is arranged on the upper plane of the middle connecting plate (7), an upper connecting plate (9) is connected onto the first guide rail (8) in a sliding manner, the outer end of the telescopic rod of the air cylinder (6) is fixedly connected with the upper connecting plate (9) through the air cylinder (6) connecting plate, an injector (11) and a first driving mechanism are sequentially arranged on the upper connecting plate (9), the rear end of a push rod (12) of the injector (11) is connected with the first driving mechanism, the first driving mechanism can push the push rod (12), the axis of the injector (11) is coaxial or parallel to the axis of the first driving mechanism, and the axis of the injector (11) is parallel to the telescopic rod stretching direction of the air cylinder (6), the air cylinder (6) is fixed on the lower connecting plate (14) directly or through an air cylinder support (13), and the lower connecting plate (14) is fixedly arranged on the rack.

3. A grinding machine as claimed in claim 2 in which: the first driving mechanism comprises a screw rod (21) and a first motor (22), the first motor (22) is arranged on a second guide rail (23) in a sliding mode, the second guide rail (23) is fixedly arranged on the upper connecting plate (9), one end of the screw rod (21) is connected with a rotating shaft of the first motor (22) through a coupler, the other end of the screw rod is abutted to the push rod (12), the second guide rail (23) and the first guide rail (8) are arranged in parallel, a thread supporting seat (24) is connected to the screw rod (21) in a threaded mode, and the thread supporting seat (24) is fixedly arranged on the upper connecting plate (9).

4. A grinding machine as claimed in claim 3 in which: the screw rod (21) is supported on the upper connecting plate (9) through an embedded retainer (26), and the injector (11) is supported on the upper connecting plate (9) through a base (27).

5. A grinding machine as claimed in claim 1 in which: an arc trimmer for trimming a grinding wheel is arranged on the sliding table (3) between the headstock (4) and the tailstock (5), the arc trimmer comprises a chassis (31), a groove (32) is longitudinally formed in the chassis (31), a bottom plate (33) is arranged on the upper plane of the chassis (31), the bottom plate (33) covers one end of the groove (32), a second motor (34) is arranged on the bottom plate (33), a rotating shaft of the second motor (34) penetrates through the bottom plate (33) to be located in the groove (32), a support is erected at the other end of the chassis (31), the upper end and the lower end of the bow frame (35) are respectively arranged on the support and the chassis (31), the lower end of the bow frame (35) is located in the other end of the groove (32), the bow frame (35) is connected with the rotating shaft of the second motor (34) through a second driving mechanism, a diamond pen (36) is longitudinally arranged on the bow frame (35), and the tip of the diamond pen (36) extends out of the bow frame (35), the diamond pen (36) rotates along with the bow frame (35), and the bow frame (35) is driven by the second motor (34) and the second driving mechanism to rotate in a left-right reciprocating mode.

6. A machine as claimed in claim 5 in which: the support is including setting up left stand (37) and right stand (38) in bow (35) left and right sides, and the lower extreme of left stand (37), right stand (38) sets firmly on chassis (31), both ends fixed connection about upper end and crossbeam board (39), bow (35) rotate and set up between crossbeam board (39) and chassis (31).

7. A machine as claimed in claim 6, in which: an upper positioning tip (40) and a lower positioning tip (41) are respectively arranged on the cross beam plate (39) and the chassis (31), an upper conical hole and a lower conical hole are respectively arranged on the upper end surface and the lower end surface of the bow frame (35), the tip of the upper positioning tip (40) is inserted into the upper conical hole, the tip of the lower positioning tip (41) is inserted into the lower conical hole, and the bow frame (35) is rotatably connected between the cross beam plate (39) and the chassis (31) through the upper positioning tip (40) and the lower positioning tip (41).

8. A machine as claimed in claim 6, in which: be provided with diamond pen mounting hole on bow (35), the pointed end of diamond pen (36) stretches out outside the front end of diamond pen mounting hole, is provided with lug (42) on bow (35) of diamond pen mounting hole rear end, and lug (42) pass through the fix with screw on bow (35), and when bow (35) left and right sides rotated, carry on spacingly by lug (42) butt on left stand (37) or right stand (38).

9. A machine as claimed in claim 5 in which: the second driving mechanism comprises a first belt pulley (43) arranged on a rotating shaft of the second motor (34) and a second belt pulley (44) arranged at the lower end of the bow rack (35), and the first belt pulley (43) and the second belt pulley (44) are both positioned in the groove (32) and are in transmission connection through a belt.

10. A grinding machine as claimed in claim 1 in which: the upper plane of the headstock (4) is fixedly provided with a vertical grinding device (46), and the vertical grinding device (46) is fixedly arranged on the upper plane of the headstock (4) through an upright column (47) and a cantilever (48).