A double-grinding-wheel rotary grinding machine

Abstract

The present invention relates to a double-grinding-wheel rotary grinding machine, which comprises a machine body, a spindle mechanism arranged on the machine body, and a knife-grinding mechanism. The knife-grinding mechanism comprises a base connected to the machine body, a rotary tool holder rotatably connected to the base, and at least two groups of grinding assemblies arranged around the rotation center axis of the rotary tool holder and connected to the rotary tool holder. The grinding assembly comprises a grinding motor, a transmission member driven by the grinding motor to rotate and rotatably connected to the rotary tool holder, and a grinding wheel connected to the transmission member. The transmission ratios between the grinding motors and the transmission members in different grinding assemblies are different. The present invention has the effect of being able to provide two different grinding speeds on one device.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding machines, and more particularly to a double - grinding - wheel rotary grinding machine. Background Art

[0002] A grinding machine is a machine tool that grinds the surface of a workpiece using a grinding tool.

[0003] The patent with the Chinese patent publication number CN207155410U discloses a high - precision numerically - controlled internal grinding machine, including a grinding machine body. One side of the top of the grinding machine body is fixedly installed with a support plate, and a placement groove is opened on the other side of the top of the grinding machine body. Two groups of first support rods are welded on the inner wall of the bottom end of the placement groove. The tops of the first support rods are respectively provided with first elastic rods. Above the grinding machine body, there are two oppositely - arranged fixing plates, and the bottom end of the fixing plate is fixedly connected to the top end of the first elastic rod. Between the fixing plates, there are two pressing plates. On the sides of the pressing plate and the fixing plate close to each other, a plurality of second elastic rods and second support rods are respectively welded. Elastic cavities are provided on both the first support rods and the second support rods, and springs are fixedly connected to the inner walls of the elastic cavities.

[0004] The above - mentioned prior - art solution has the following defects: It only has a grinding wheel with one rotational speed and can only meet one of the grinding requirements. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, one of the purposes of the present invention is to provide a double - grinding - wheel rotary grinding machine, which can expand the applicable processing range.

[0006] The above - mentioned invention purpose of the present invention is achieved through the following technical solutions: A double - grinding - wheel rotary grinding machine includes a machine body, a main - shaft mechanism arranged on the machine body, and a grinding mechanism. The grinding mechanism includes a base fixedly connected to the machine body, a rotary tool holder rotatably connected to the base, and at least two sets of grinding components arranged around the rotation center axis of the rotary tool holder and connected to the rotary tool holder. The grinding component includes a grinding motor, a transmission member driven by the grinding motor to rotate and rotatably connected to the rotary tool holder, and a grinding wheel connected to the transmission member. The transmission ratios between the grinding motors and the transmission members in different grinding components are different.

[0007] By adopting the above - mentioned technical solutions, on one piece of equipment, when different workpieces need to be ground with grinding wheels at different rotational speeds, the rotary tool holder can be rotated, so that the grinding wheel with the corresponding rotational speed rotates to the position where the workpiece can be processed, improving the diversity of the processing that the equipment can perform, and also facilitating the conversion among various different processing methods, thus improving the convenience of equipment operation.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the base is provided with a guiding and limiting mechanism, which includes a limiting bolt embedded and fixed in the base, and a fixed sleeve that passes through the rotary tool holder and can be sleeved and threadedly connected to the limiting bolt. One end of the fixed sleeve extending out of the rotary tool holder is integrally formed with a pressing end that can abut against the upper end surface of the rotary tool holder.

[0009] By adopting the above technical solution, when it is necessary to adjust grinding wheels with different rotational speeds, the rotary tool holder is rotated on the base. After the rotary tool holder rotates to a specified position, the fixed sleeve is rotated so that the fixed sleeve can be threadedly connected to the limiting bolt, and the rotary tool holder is abutted against the base by relying on the limiting bolt, thereby fixing the position of the rotary tool holder for subsequent processing.

[0010] In a preferred embodiment, the present invention can be further configured as follows: the base is fixedly connected with a central shaft, the central shaft is vertical and extends out of the upper end surface of the base, and one end of the central shaft extending out of the base is rotatably connected to the rotary tool holder.

[0011] By adopting the above technical solution, the rotary tool holder can rotate around the central shaft during the rotation process, so that the rotation axis of the rotary tool holder remains stable. Then, when replacing different grinding wheels, the processing position of the grinding wheel can be better determined, and better tool alignment can be achieved.

[0012] In a preferred embodiment, the present invention can be further configured as follows: the rotary tool holder includes a rotary block sleeved and rotatably connected to the upper end of the central shaft, and a mounting seat fixedly connected to the rotary block.

[0013] By adopting the above technical solution, the rotary block can be used to reduce the frictional force between the mounting seat and the base during rotation, and can also improve the stability of the mounting seat during rotation.

[0014] In a preferred embodiment, the present invention can be further configured as follows: a limiting ring sleeved on the outer wall of the base is fixedly connected to the bottom of the mounting seat.

[0015] By adopting the above technical solution, the inner wall of the limiting ring and the outer wall of the base can be kept relatively stable, and the stability of the mounting seat during rotation can be improved.

[0016] In a preferred embodiment, the present invention can be further configured as follows: the output shaft of the grinding motor is coaxially and fixedly connected with a driving pulley, the transmission member is coaxially and fixedly connected with a driven pulley, a transmission belt is sleeved between the driving pulley and the driven pulley, and the diameters of different driven pulleys are different.

[0017] By adopting the above technical solution, the driving pulley can drive the driven pulley to rotate, and during the rotation process, it can drive the transmission member to rotate around its own axis. Since the diameters of the driven pulleys are different, the rotation speeds of different transmission members are different. Therefore, when rotating the rotary tool holder, different grinding wheels with different rotation speeds can be replaced according to the grinding requirements of different workpieces.

[0018] In a preferred example of the present invention, it can be further configured that: an installation block is fixed at the bottom of the grinding motor, the installation block is slidably connected to the rotary tool holder, the rotary tool holder is threadedly connected with an adjustment bolt that abuts against the side wall of the installation block to push the installation block to move, the installation block is provided with an installation hole penetrating through the upper and lower end faces of the installation block, a locking bolt threadedly connected to the rotary tool holder is inserted into the installation hole, and the diameter of the installation hole is larger than the outer thread diameter of the locking bolt.

[0019] By adopting the above technical solution, the grinding motor can be stably and conveniently installed. Rotating the adjustment bolt can change the position of the installation block on the rotary tool holder, thereby being able to adjust the tension of the transmission belt, extend the service life of the transmission belt, and also achieve more stable transmission.

[0020] In a preferred example of the present invention, it can be further configured that: it further includes a cutting fluid supply mechanism. The cutting fluid supply mechanism includes a liquid inlet main pipe that is hermetically and rotatably connected to the machine body around the rotation axis of the rotary tool holder, a liquid inlet branch pipe that is communicated with the liquid inlet main pipe and corresponds to the grinding assembly one by one, and a liquid outlet hose that is communicated with the liquid inlet branch pipe and can be aligned with the grinding wheel. A switching valve is provided between the liquid inlet branch pipe and the liquid outlet hose.

[0021] By adopting the above technical solution, different grinding wheels can be washed by cutting fluid during the processing, and it can be introduced through a single liquid inlet main pipe and the flow can be controlled by a switching valve, so that different grinding wheels can be washed by cutting fluid during the processing. At the same time, relying on the rotatable liquid inlet main pipe, the transmission of cutting fluid will not be affected during the rotation of the rotary tool holder.

[0022] In summary, the present invention includes at least one of the following beneficial technical effects:

[0023] By using the rotary tool holder that can rotate on the base and the grinding wheels with different rotation speeds arranged on the rotary tool holder, various grinding processes with different rotation speeds can be realized on the same device, expanding the diversity and convenience of the processing of the entire device;

[0024] By using the guiding and limiting mechanism, it can play a limiting role in the rotation process of the rotary tool holder and can position the rotary tool holder, so that the grinding wheel on the rotary tool holder can stably process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a side schematic view of this embodiment.

[0026] Figure 2 It is the front view of this embodiment.

[0027] Figure 3 It is Figure 2 the enlarged view of part A in

[0028] Figure 4 It is Figure 2 the enlarged view of part B in

[0029] Figure 5 It is Figure 2 the enlarged view of part C in

[0030] Figure 6 It is the top view mainly used to show the grinding assembly.

[0031] Figure 7 It is Figure 1 the enlarged view of part D in

[0032] In the figure, 1 is the machine body; 3 is the knife grinding mechanism; 31 is the base; 32 is the rotating tool holder; 321 is the rotating block; 322 is the mounting seat; 33 is the grinding assembly; 331 is the grinding motor; 332 is the transmission part; 333 is the grinding wheel; 4 is the guiding and limiting mechanism; 41 is the limiting bolt; 42 is the fixed sleeve; 5 is the abutting end; 6 is the central shaft; 7 is the limiting ring; 8 is the driving pulley; 9 is the driven pulley; 10 is the transmission belt; 11 is the mounting block; 12 is the adjusting bolt; 13 is the mounting hole; 14 is the locking bolt; 15 is the cutting fluid supply mechanism; 151 is the main liquid inlet pipe; 152 is the liquid inlet branch pipe; 153 is the liquid outlet hose; 16 is the switch valve; 17 is the mounting groove; 18 is the rotating groove; 19 is the bearing; 20 is the fixing groove; 21 is the fixing block; 22 is the fixing bolt; 23 is the connecting ring; 24 is the counterbore; 25 is the connecting bolt; 26 is the sealing ring; 27 is the limiting groove; 28 is the photoelectric sensor; 29 is the detection plate; 30 is the adjusting block; 34 is the inlet pipe; 35 is the probe; 36 is the rotating shaft; 37 is the rotating gear; 38 is the rotating rack; 39 is the adjusting cylinder; 40 is the positioning groove; 43 is the positioning pin. Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Referring to Figure 1 , a double - grinding - wheel rotary grinding machine disclosed by the present invention includes a machine body 1, a main shaft mechanism (not shown in the figure) connected to the machine body 1 for clamping workpieces, and a grinding wheel 333 mounted (marked in Figure 6) grinding mechanism 3, the grinding mechanism 3 includes a rotatable rotary tool holder 32, two sets of grinding components 33 are arranged on the rotary tool holder 32, and the grinding speeds of the two sets of grinding components 33 are different. When grinding processes with different grinding speeds are required, rotate the rotary tool holder 32 to align the grinding wheel 333 with the corresponding grinding speed with the workpiece clamped in the spindle mechanism, so as to complete the corresponding grinding processing requirements.

[0035] Refer to Figure 2 As shown in the figure, the grinding mechanism 3 includes a base 31 slidably connected to the machine body 1 in the horizontal direction perpendicular to the central axis of the spindle mechanism through a lead screw slider mechanism. The rotary tool holder 32 is arranged on the base 31. The rotary tool holder 32 includes a mounting base 322 for mounting two sets of grinding components 33. Combining Figure 3 As shown in the figure, an installation groove 17 is opened at a position near the bottom of the mounting base 322. A cylindrical rotary block 321 with a T-shaped cross section is fixedly connected in the installation groove 17 through bolts. A sealed setting is formed between the outer wall of the rotary block 321 and the side wall of the installation groove 17. A rotating groove 18 is opened at the bottom of the rotary block 321. A bearing 19 is embedded in the rotating groove 18. A central shaft 6 is fixed to the inner ring of the bearing 19. The central shaft 6 rotates relative to the rotary block 321. A fixing groove 20 for fixing the central shaft 6 is opened on the bottom surface of the base 31. A disc-shaped fixing block 21 is embedded at the bottom of the fixing groove 20. A fixing bolt 22 that can be threadedly connected to the bottom end surface of the central shaft 6 is passed through the fixing block 21.

[0036] Refer to Figure 4 As shown in the figure, in order to improve the stability of the mounting base 322 during rotation, a connecting ring 23 is integrally formed on the side wall near the bottom of the mounting base 322. A plurality of counterbores 24 are uniformly arranged along the central axis 6 of the connecting ring 23 at the edge of the connecting ring 23. The central axis of the counterbore 24 is vertical and penetrates the bottom surface of the connecting ring 23. A connecting bolt 25 is passed through the counterbore 24. A ring-shaped limiting ring 7 is threadedly connected to the bottom of the connecting bolt 25. The inner wall of the limiting ring 7 abuts against the outer wall of the base 31, so that the mounting base 322 can remain coaxial with the base 31 and will not deflect during rotation, and a sealing ring 26 is arranged between the connecting ring 23 and the outer wall of the base 31.

[0037] Refer to Figure 5As shown, in order to be able to fix and limit the mounting seat 322, a guide and limiting mechanism 4 is provided on the base 31, and the guide and limiting mechanism 4 includes a limiting bolt 41 embedded and fixed in the base 31 and inverted, the head of the limiting bolt 41 is fixedly embedded in the base 31, and the rod of the limiting bolt 41 is passed through an arc-shaped limiting groove 27 opened on the mounting seat 322, the arc of the limiting groove 27 is 180°, and the connecting line between the two ends of the limiting groove 27 is perpendicular to the connecting line between the two groups of grinding components 33, and a fixing screw sleeve 42 is passed through the limiting groove 27, the bottom of the fixing screw sleeve 42 can be sleeved and threadedly connected to the rod of the limiting bolt 41, and a tightening end head 5 that can be tightened against the upper end surface of the mounting seat 322 is integrally formed on the top of the fixing screw sleeve 42, and the mounting seat 322 can be tightened against the upper surface of the base 31 by using the tightening end head 5, thereby fixing the mounting seat 322. In order to determine the rotation position, a photoelectric sensor 28 (marked at Figure 2 ), and the outer wall of the mounting seat 322 is fixedly connected to the grinding assembly 33 (marked at Figure 2 ) One-to-one corresponding detection plates 29, the connection line between the two detection plates 29 is perpendicular to the connection line between the two grinding assemblies 33. In the process of rotating the mounting seat 322, when the detection plate 29 moves to the photoelectric sensor 28, it can be indicated that the mounting seat 322 has been rotated to the specified position. The photoelectric sensor 28 can be electrically connected to the sound and light alarm for reminder. At the same time, the two ends of the limit groove 27 correspond to one group of grinding assemblies 33 respectively. When the limit bolt 41 contacts the end of the limit groove 27, it can also indicate that the mounting seat 322 has been rotated into place, so that the central axis of the grinding wheel 333 is parallel to the central axis of the workpiece. During the processing, it may be necessary to perform taper grinding on the workpiece, and the relative angle between the grinding wheel 333 and the central axis of the spindle mechanism can also be adjusted by rotating the mounting seat 322.

[0038] Reference Figure 6 As shown, the grinding assembly 33 includes a grinding motor 331 installed on a mounting seat 322 and tilted, a driving pulley 8 is coaxially fixedly connected to the output shaft of the grinding motor 331, a driving pulley 8 is sleeved with a transmission belt 10 on the outer wall of the driving pulley 8, and a driven pulley 9 is sleeved with the inner wall of the other side of the transmission belt 10, and the driven pulley 9 is coaxially fixedly connected with a cylindrical transmission member 332, and the transmission member 332 is penetrated and rotatably connected to the mounting seat 322 through a bearing arranged between the outer wall of the transmission member 332 and the mounting seat 322, and the transmission member 332 extends from one side wall of the mounting seat 322 away from the driven pulley 9, and a grinding wheel 333 is detachably connected to this end of the transmission member 332 by a threaded connection. If the driven pulleys 9 in the two groups of grinding assemblies 33 have different diameters, the grinding wheels 333 on both sides can be ground at different speeds through the grinding motor 331.

[0039] For the installation of the grinding motor 331, a plate-shaped mounting block 11 is fixed at the bottom of the grinding motor 331 (which can also be referred to Figure 1 ), the side wall for fixing the mounting block 11 is inclined, a mounting hole 13 penetrating the upper and lower end faces is provided at each of the four corners of the mounting block 11, a locking bolt 14 threadedly connected to the mounting seat 322 is inserted into each mounting hole 13. In order to be able to adjust the position of the mounting block 11, the diameter of the mounting hole 13 is set to be larger than the outer thread diameter of the locking bolt 14, and an adjustment block 30 is fixedly connected to the side wall of the inclined mounting seat 322. An adjustment bolt 12 is inserted through and threadedly connected to the adjustment block 30, and the end of the adjustment bolt 12 abuts against the side wall of the mounting block 11. Then, when the adjustment bolt 12 is rotated, the mounting block 11 can be pushed to move on the side wall of the mounting seat 322, thereby tensioning the drive belt 10.

[0040] Refer to Figure 1 As shown, in order to apply cutting fluid during the machining process, a cutting fluid supply mechanism 15 is provided on the machine body 1. The cutting fluid supply mechanism 15 includes a liquid inlet main pipe 151 coaxial with the central shaft 6. The liquid inlet main pipe 151 is hermetically and rotationally connected to an inlet pipe 34 fixedly connected to the machine body 1 and communicating with an external cutting fluid storage tank. The liquid inlet main pipe 151 communicates with two liquid inlet branch pipes 152 corresponding to the grinding assemblies 33 one by one. The liquid inlet branch pipes 152 communicate with a hollow communication block provided on the mounting seat 322. A liquid outlet hose 153 aligned with the grinding wheel 333 is communicated with the communication block. A switch valve 16 is provided between the liquid inlet branch pipe 152 and the liquid outlet hose 153.

[0041] Combined with Figure 1 and Figure 7 As shown, in order to be able to position the workpiece, a positioning mechanism corresponding to the grinding assembly 33 one by one is provided on the mounting seat 322. The positioning mechanism includes a probe 35 rotatably connected to the mounting seat 322 (which can also be referred to Figure 2 ). The probe 35 can be an infrared trigger probe produced by Dongfang Qidu. A rotating shaft 36 is fixedly connected to the end of the probe 35 far from its measuring point (marked in Figure 2 ), the rotating shaft 36 is rotatably connected to the mounting seat 322. A rotating gear 37 is coaxially and fixedly connected to the end of the rotating shaft 36 far from the probe 35. A rotating rack 38 meshing with the rotating gear 37 is slidably connected to the mounting seat 322 in the vertical direction. An adjusting cylinder 39 for driving the rack to move is fixed on the mounting seat 322 (combined with Figure 2), a positioning groove 40 is formed in the side wall of the rotating rack 38, and a positioning pin 43 placed in the positioning groove 40 is fixed on the mounting seat 322. When the adjusting cylinder 39 drives the rotating rack 38 to move until the positioning pin 43 abuts against the upper side wall of the positioning groove 40, the rotating gear 37 rotates 90°, so that the probe 35 is converted from the original vertical state to a horizontal state.

[0042] The main shaft mechanism includes a main shaft box disposed on the machine body 1 and a three-jaw chuck connected to the main shaft box for clamping a workpiece. The main shaft box can move on the machine body 1 under the lead screw slider mechanism along its central axis, so that the workpiece is ground by the grinding wheel 333.

[0043] The implementation principle of this embodiment is as follows: Before processing, select a grinding wheel 333 with a corresponding speed according to the actual grinding requirements. Disconnect the fixing sleeve 42 from the limit bolt 41 and rotate the mounting seat 322. When the limit bolt 41 abuts against the end of the limit groove 27, thread the fixing sleeve 42 onto the limit bolt 41. At this time, the mounting seat 322 is fixed, so that the central axis of the corresponding grinding wheel 333 and the workpiece on the main shaft can be kept coaxial. Also, according to the actual grinding processing requirements, the mounting seat 322 can be rotated to adjust the relative angle between the central axis of the grinding wheel 333 and the central axis of the main shaft, so as to complete the grinding processing of different conical surfaces.

[0044] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A double-grinding-wheel rotary grinding machine, comprising a machine body (1), a main shaft mechanism and a knife-grinding mechanism (3) arranged on the machine body (1), characterized in that: The grinding mechanism (3) includes a base (31) connected to the machine body (1), a rotary tool holder (32) rotatably connected to the base (31), and at least two sets of grinding components (33) arranged around the axial center of rotation of the rotary tool holder (32) and connected to the rotary tool holder (32). The grinding component (33) includes a grinding motor (331), a transmission member (332) driven by the grinding motor (331) to rotate and rotatably connected to the rotary tool holder (32), and a grinding wheel (333) connected to the transmission member (332). The transmission ratios between the grinding motors (331) and the transmission members (332) in different grinding components (33) are different; The base (31) is provided with a guiding and limiting mechanism (4). The guiding and limiting mechanism (4) includes a limiting bolt (41) embedded and fixed in the base (31), and a fixing sleeve (42) passing through the rotary tool holder (32) and threadably sleeved on the limiting bolt (41). One end of the fixing sleeve (42) extending out of the rotary tool holder (32) is integrally formed with a pressing end (5) that can abut against the upper end face of the rotary tool holder (32); The base (31) is fixedly connected with a central shaft (6). The central shaft (6) is vertical and extends out of the upper end face of the base (31). One end of the central shaft (6) extending out of the base (31) is rotatably connected to the rotary tool holder (32); The rotary tool holder (32) includes a rotary block (321) sleeved and rotatably connected to the upper end of the central shaft (6), and a mounting seat (322) fixedly connected to the rotary block (321); The bottom of the mounting seat (322) is fixedly connected with a limiting ring (7) sleeved on the outer wall of the base (31). The inner wall of the limiting ring (7) abuts against the outer wall of the base (31).

2. A double - grinding - wheel rotary grinding machine according to claim 1, characterized in that: The output shaft of the grinding motor (331) is coaxially and fixedly connected with a driving pulley (8). The transmission member (332) is coaxially and fixedly connected with a driven pulley (9). A transmission belt (10) is sleeved between the driving pulley (8) and the driven pulley (9). The diameters of different driven pulleys (9) are different.

3. The double grinding wheel rotary grinding machine according to claim 2, characterized in that: The bottom of the grinding motor (331) is fixed with a mounting block (11). The mounting block (11) is slidably connected to the rotary tool holder (32). The rotary tool holder (32) is threadably connected with an adjusting bolt (12) that abuts against the side wall of the mounting block (11) to push the mounting block (11) to move. The mounting block (11) is provided with a mounting hole (13) penetrating through the upper and lower end faces of the mounting block (11). A locking bolt (14) threadably connected to the rotary tool holder (32) is inserted into the mounting hole (13). The diameter of the mounting hole (13) is larger than the outer thread diameter of the locking bolt (14).

4. A double-grinding-wheel rotary grinding machine according to claim 1, characterized in that: It further includes a cutting fluid supply mechanism (15). The cutting fluid supply mechanism (15) includes a liquid inlet main pipe (151) that is rotationally and sealingly connected to the machine body (1) around the rotation axis of the rotary tool holder (32), a liquid inlet branch pipe (152) that is communicated with the liquid inlet main pipe (151) and corresponds to the grinding assembly (33) one by one, and a liquid outlet hose (153) that is communicated with the liquid inlet branch pipe (152) and can be aligned with the grinding wheel (333). A switching valve (16) is provided between the liquid inlet branch pipe (152) and the liquid outlet hose (153).

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