Double-sided precision grinding machine

Abstract

A double-face precision grinding machine comprises a machine frame (100), a grinding wheel mechanism (10), a feeding mechanism (20) and an electric adjusting mechanism (30) used for adjusting the feeding amount of the grinding wheel mechanism (10), the electric adjusting mechanism (30) comprises a guide rail (31), a first transmission mechanism (32) and a driving servo motor (33), and the driving servo motor (33) is connected with a mounting base (11) through the first transmission mechanism (32); the periphery of the feeding mechanism (20) is provided with a plurality of bins (22) used for containing workpieces to be machined and made of non-metallic materials. The precise grinding machine tool further comprises a control system (60) used for controlling all the parts to work. The cost of the precise grinding machine tool is greatly reduced compared with that of a numerical control machine tool, due to the fact that multiple technical measures are adopted, grinding of precise parts can be met, and the problem that machining precision is difficult to achieve through a traditional grinding machine is solved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a precision double-sided grinder used for grinding tight parts. Background Art

[0002] At present, the precision required for products is getting higher and higher. For the processing of precision parts, many of them are processed by CNC grinding machines. This kind of equipment has high requirements for operators and the cost of the equipment is also very high. Obviously, it is not suitable for the processing of small batches of parts. The processing cost and equipment maintenance cost are very high. The use of traditional grinding machines is difficult to achieve the precision requirements due to the relatively simple clamping mechanism and adjustment mechanism. Summary of the invention

[0003] The double-sided precision grinding machine designed by the utility model adopts combined measures such as double-sided grinding at the same time and electrically adjusting the feed amount, so as to solve the technical problems of low processing precision or high processing cost in the prior art.

[0004] The double-sided precision grinding machine designed by the utility model to solve the above technical problems comprises a frame, a grinding wheel mechanism arranged on the frame, a feeding mechanism for conveying the workpiece to be ground to the workstation, and an electric adjustment mechanism for adjusting the feeding amount of the grinding wheel mechanism, wherein the electric adjustment mechanism comprises a guide rail, a first transmission mechanism, and a driving servo motor, wherein the guide rail is arranged on the frame, the mounting seat of the grinding wheel mechanism is located on the guide rail, and the driving servo motor is connected to the mounting seat via the first transmission mechanism; the feeding mechanism comprises a material guide plate, and a plurality of material bins for placing the workpiece to be processed are arranged around the material guide plate, and the material bins are made of non-metallic materials. The double-sided precision grinding machine further comprises a control system for controlling the operation of the above-mentioned parts.

[0005] A further improvement of the utility model is that the first transmission mechanism is a screw rod connected to the output shaft of the driving servo motor and a thread sleeve fixed on the mounting seat, and the thread sleeve cooperates with the screw rod.

[0006] A further improvement of the utility model is that the material guide plate and the material bin are separate, and the material bin is installed on the material guide plate by means of inlay.

[0007] A further improvement of the utility model is that the feeding mechanism also includes a material pressing device, which includes an adjusting wheel, a tensioning wheel and an intermediate wheel arranged in a triangular shape on a bracket in the frame, the adjusting wheel, the tensioning wheel and the intermediate wheel are connected by a pressure belt, the tensioning wheel and the intermediate wheel are straddled on the upper and lower sides of the material guide plate, the pressure belt between the tensioning wheel and the intermediate wheel is at least partially pressed on a partial circumference of the material guide plate, the tensioning wheel is provided with an adjusting mechanism for controlling its lateral movement, and the pressure belt is a belt or a narrow steel belt.

[0008] A further improvement of the utility model is that the feeding mechanism also includes a first driving motor and a second transmission mechanism for driving the material guide plate, the first driving motor is connected to the material guide plate through the second transmission mechanism, and the second transmission mechanism is a gear transmission system.

[0009] A further improvement of the utility model is that the grinding wheel mechanism includes a second drive motor, a mounting shaft and a grinding wheel disc, the mounting shaft is mounted in a bearing seat of the mounting seat, the second drive motor is connected to one end of the mounting shaft, the grinding wheel disc is sleeved on the other end of the mounting shaft, the middle mounting inner hole of the grinding wheel disc is at least partially a conical surface, the position where the grinding wheel disc is mounted on the mounting shaft is provided with a conical cylindrical surface matching the conical surface of the inner hole of the grinding wheel disc, and the grinding wheel disc is evenly distributed along the mounting inner hole with a plurality of fixing screws for fixed connection with the mounting shaft.

[0010] A further improvement of the utility model is that the double-sided precision grinder also includes a cooling water system, which includes a circulation loop composed of a water tank, a water pump, a water inlet pipeline, a nozzle and a wastewater recovery pipeline. The nozzle is arranged near the grinding station and sprays water to the grinding station. The water tank is divided into two water storage chambers by at least two layers of filter screens, and the water inlet pipeline and the wastewater recovery pipeline are respectively connected to the two water storage chambers of the water tank.

[0011] A further improvement of the utility model is that the double-sided precision grinder also includes a precise loading mechanism, which includes a material guide rack arranged at the feeding position of the material guide disc, the material guide rack is composed of two guide plates arranged in parallel, an adjustment device for adjusting the gap of the material guide rack is provided between the two guide plate type material guide racks, and the position where the material guide rack unloads from the material guide disc is in the shape of a trumpet that gradually shrinks in the direction of the material guide disc.

[0012] The utility model adopts the above-mentioned combined technology, which greatly reduces the cost of this double-sided precision grinder compared to the cost of CNC machine tools. Due to the use of multiple technical measures, it can also meet the grinding of precision parts and avoid the problem that traditional grinders are difficult to achieve processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the double-sided precision grinding machine of the utility model.

[0014] Figure 2 It is a schematic diagram of the electric adjustment structure of the grinding wheel system of the utility model.

[0015] Figure 3 It is a control system diagram of the electric adjustment mechanism of the grinding wheel system of the utility model.

[0016] Figure 4 It is a three-dimensional schematic diagram of the material guide tray of the utility model.

[0017] Figure 5 It is a schematic diagram of the material pressing device of the utility model.

[0018] Figure 6 It is a schematic diagram of the transmission mechanism of the utility model.

[0019] Figure 7 It is a schematic diagram of the installation structure of the guide plate of the utility model.

[0020] Figure 8 It is a schematic diagram of the cooling water system of the utility model.

[0021] Fig. 9 It is a schematic diagram of the precise feeding mechanism of the utility model. DETAILED DESCRIPTION

[0022] The specific embodiments of the present utility model are described in conjunction with the above-mentioned drawings.

[0023] Depend on Figures 1 to 9 It can be seen that the double-sided precision grinding machine of the utility model includes a frame 100, a grinding wheel mechanism 10 arranged on the frame 100, a feeding mechanism 20 for conveying the workpiece to be ground to the workstation, and an electric adjustment mechanism 30 for adjusting the feed amount of the grinding wheel mechanism 10, the electric adjustment mechanism 30 includes a guide rail 31, a first transmission mechanism 32 and a driving servo motor 33, the guide rail 31 is arranged on the frame 100, the mounting seat 11 of the grinding wheel mechanism 10 is located on the above-mentioned guide rail 31, and the driving servo motor 33 is connected to the mounting seat 11 through the first transmission mechanism 32; the feeding mechanism 20 includes a guide plate 21, and a plurality of bins 22 for placing the workpieces are arranged around the guide plate 21, and the bins 22 are made of non-metallic materials. The double-sided precision grinding machine further includes a control system for controlling the operation of the above-mentioned parts. The utility model adopts an electric adjustment mechanism to adjust the grinding wheel feed rate, which can be accurately adjusted to meet the technical requirements of precision parts processing. At the same time, in view of the problem that precision parts have relatively high requirements for surface finish, the utility model adopts a non-metallic material guide plate or an inlaid non-metallic material bin to prevent the problem of scratching the workpiece surface during processing.

[0024] Depend on Figure 2It can be seen that the first transmission mechanism 32 in the utility model is a screw rod 321 connected to the output shaft of the driving servo motor 33 and a thread sleeve 322 fixed on the mounting seat 11, and the thread sleeve 322 cooperates with the screw rod 321. In order to ensure the processing accuracy, the utility model adopts a more efficient and high-precision screw rod thread sleeve structure. The driving servo motor 33 drives the screw rod 321 to rotate, and drives the grinding wheel mounting seat 11 to move through the thread sleeve 322 that cooperates with it. Since the transmission ratio of the screw rod thread sleeve is relatively large, the feed amount of the grinding wheel can be accurately adjusted. In order to avoid errors in the adjustment system, the control system 60 of the utility model includes a processing unit 61 for controlling the work of each part of the grinding machine, and also includes a detection unit 62 connected to the above-mentioned processing unit. The detection unit 62 includes a detection processing module 621, which is connected to the processing unit 61, and also includes a grinding wheel detection probe 622 for detecting the grinding wheel feed adjustment data and connected to the detection processing module 621. The grinding wheel detection probe 622 detects the actual feed amount after the grinding wheel system is adjusted, and transmits the detection data to the detection processing module. If an error occurs, the control adjustment mechanism is further adjusted until the requirement is met. In order to ensure the stability of product quality, the detection unit 62 also includes a workpiece detection probe 623 that scans the workpiece size and is connected to the detection processing module 621. The system controls the workpiece detection probe 623 to regularly or randomly check the actual size of the workpiece after processing, and feeds back the data to the detection processing module. When the size deviates, the system controls the adjustment system to adjust and compensate, thereby ensuring the consistency of product quality.

[0025] The non-metallic material used to make the material bin 21 of the utility model is a glass fiber synthetic material, and the non-metallic material used to make the material bin can also be selected as bakelite or nylon material according to the material of the workpiece. The guide plate 21 and the material bin 22 of the utility model can be made of non-metallic materials in one piece. Figure 4 It can be known that the guide plate 21 and the silo 22 can also be separate. A more specific design includes: the silo 22 is embedded in the mounting seat 211 set on the guide plate 21 through the fixing seat 221 set at the tail of the silo 22 to achieve the connection and fixation between the guide plate 21 and the silo 22. This structure fully limits the radial movement of the silo and ensures the processing accuracy. In the assembly process, cold installation or appropriate transition fit can also limit the axial movement to a certain extent. For double-sided grinding machine processing, the axial thrust generated during the processing is negligible, which can fully meet the requirements of processing accuracy. It can also be designed that the silo 22 is a support, which is directly mounted on the guide plate 21. This structure is relatively simple to assemble, and the support processing is also relatively simple, with lower cost. Choosing an appropriate assembly method can fully meet the processing requirements.

[0026] Depend on Figure 5It can be seen that the feeding mechanism 20 also includes a pressing device, which includes an adjusting wheel 23, a tensioning wheel 24 and an intermediate wheel 25 arranged in a triangular shape on the bracket 110 in the frame 100, and the adjusting wheel 23, the tensioning wheel 24 and the intermediate wheel 25 are connected by a pressing belt 26. The tensioning wheel 24 and the intermediate wheel 25 are arranged on both sides of the upper and lower sides of the guide plate 21. The pressing belt between the tensioning wheel 24 and the intermediate wheel 25 is at least partially pressed on a part of the circumference of the guide plate 21. The tensioning wheel 24 is provided with an adjusting mechanism 27 for controlling its lateral movement, and the pressing belt 26 is a belt or a narrow steel belt. This solution is mainly aimed at the specific design of equipment requirements for workpieces of different widths. For workpieces of different thicknesses (widths), not only do you need to adjust the grinding parameters of the grinding wheel, but you also need to choose belts of different widths. If the side of the belt protrudes from the grinding surface of the workpiece, the workpiece will not be ground, and the grinding wheel will grind the belt. In the process of replacing the belt, it is difficult to avoid the problem of position misalignment. For slight errors, it may not affect the processing, but for workpieces with large changes in size, the belt position error may affect the processing process. In this solution, it is considered that when the size of the workpiece changes, the belt position error may affect the processing process, so an adjustment mechanism 27 is designed to adjust the specific position of the belt to better clamp the workpiece, and it does not affect the processing quality. In terms of specific design, the adjustment mechanism 27 is a tightening screw 241 set on the tensioning wheel 24. The tensioning wheel 24 is adjusted by hand, and then the tensioning wheel 24 is fixed to the rotating shaft by tightening the tightening screw 241 to achieve the purpose of position locking. The present invention can also be designed with a more complex adjustment mechanism. For example, the adjustment mechanism 27 is an adjustment mechanism for controlling and locking the lateral movement of the rotating shaft of the tensioner 24. This method can use an adjustment screw set on the bracket, one end of which is connected to the bearing seat for installing the rotating shaft, and the other end is screwed to the bracket and locked with a spare nut (not shown in the figure).

[0027] Depend on Figure 6 It can be seen that the feeding mechanism 20 also includes a first driving motor 28 and a second transmission mechanism 29 for driving the guide plate 21. The first driving motor 28 is connected to the guide plate 21 through the second transmission mechanism 29, and the second transmission mechanism 29 is a gear transmission system. The utility model adopts a gear transmission system, which can not only achieve smooth transmission, but also reduce costs and improve maintenance convenience. Of course, when designing and selecting parameters such as the gear module and the number of teeth, it is necessary to specifically consider meeting the technical requirements for workpiece grinding. The specific design parameters are that the module of the driving gear, the driven gear and the intermediate gear is 2, the number of teeth of the driving gear is 20, the number of teeth of the intermediate gear is 70, and the number of teeth of the driven gear is 80. The parameter selection in this scheme mainly depends on the grinding accuracy level of the grinder, thereby adjusting the grinding wheel speed during grinding.

[0028] Depend on Figure 7 It can be seen that the grinding wheel mechanism 10 includes a second drive motor 12, a mounting shaft 13 and a grinding wheel disc 14, the mounting shaft 13 is installed in the bearing seat of the mounting seat 11, the second drive motor 12 is connected to one end of the mounting shaft 13, the grinding wheel disc 14 is sleeved on the other end of the mounting shaft 13, the middle mounting inner hole 141 of the grinding wheel disc 14 is at least partially a conical surface, the position where the grinding wheel disc 14 is installed on the mounting shaft 13 is provided with a conical cylindrical surface matching the conical surface of the inner hole of the grinding wheel disc 14, and the grinding wheel disc 14 is evenly distributed along the mounting inner hole 141 with a plurality of fixing screws 142 for fixed connection with the mounting shaft 13. The reason why the utility model adopts a tapered surface combined structure is that it is difficult to avoid the existence of installation angle deviation in the installation of a general straight cylindrical inner hole. This deviation causes axial runout of the grinding surface of the grinding wheel. This runout error directly affects the processing accuracy. The use of a tapered surface matching structure can make the grinding wheel and the shaft more vertical when installed, reducing axial runout. The tightening effect of the fixing screw 142 can further reduce the axial runout caused by the installation error, thereby improving the cost rate.

[0029] Depend on Figure 8 It can be seen that the double-sided precision grinder also includes a cooling water system 40, which includes a circulation loop consisting of a water tank 41, a water pump 42, a water inlet pipe 43, a nozzle 44 and a wastewater recovery pipe 45. The nozzle 44 is arranged near the grinding station and sprays water to the grinding station. The water tank 41 is divided into two water storage chambers by at least two layers of filter screens 46, and the water inlet pipe 43 and the wastewater recovery pipe 45 are respectively connected to the two water storage chambers of the water tank 41. The cooling system of the utility model is mainly used to reduce the temperature of the workpiece grinding part to avoid affecting the processing accuracy due to the increase in temperature. In this scheme, the nozzles spray on the processing part to directly take away the heat generated by grinding. This scheme is more about the utilization of circulating water. The cooling water sprayed on the processing position is recovered into the water tank through the recovery system. If the water is allowed to circulate freely, it is bound to cause waste residue in the water to affect the grinding quality. Therefore, the water tank in the utility model is provided with a filtering system. The waste water enters the recovery water tank after recovery, and the water used by the water pump through the water inlet pipe is clean water formed by filtering the filter screen. The filter screen can be arranged upright, and the water tank is divided into two parts, left and right, and can also be designed as an upper and lower structure. The waste water is introduced into the upper water tank after recovery, and enters the lower water tank after passing through the filter screen. The water suction port of the water pump is arranged in the lower water tank.

[0030] Depend on Fig. 9It can be seen that the double-sided precision grinder also includes a precise feeding mechanism 50, which includes a guide frame 51 arranged at the feeding position of the guide disk 21, and the guide frame 51 is two parallel guide plates, and an adjusting device 52 for adjusting the gap of the guide frame 51 is arranged between the two guide plate guide frames 51, and the position where the guide frame 51 unloads from the guide disk 21 is in the shape of a trumpet that gradually shrinks in the direction of the guide disk 21. This scheme is mainly aimed at the case where the workpiece diameter is relatively small. In this case, the traditional air push or hydraulic push mode is not very suitable, and it is difficult to ensure that the parts fall accurately into the groove of the guide disk. Therefore, a guide frame structure is set in this scheme, and the adjusting device 52 adjusts the gap between the two brackets according to the size of the parts, which is suitable for the size of the workpiece and also ensures the accuracy of the material guide. In order to ensure the accuracy of the workpiece falling into the groove of the guide disk, the utility model is further designed with a trumpet-shaped guide port to ensure the accuracy of the workpiece falling.

[0031] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A double-sided precision grinding machine, characterized in that: The double-sided precision grinding machine comprises a frame (100), a grinding wheel mechanism (10) arranged on the frame (100), a feeding mechanism (20) for conveying a workpiece to be ground to a work station, and an electric adjustment mechanism (30) for adjusting the feed amount of the grinding wheel mechanism (10), wherein the electric adjustment mechanism (30) comprises a guide rail (31), a first transmission mechanism (32), and a driving servo motor (33), wherein the guide rail (31) is arranged on the frame (100), and a mounting seat (11) of the grinding wheel mechanism (10) is located on the frame (100). On the guide rail (31), the driving servo motor (33) is connected to the mounting seat (11) through a first transmission mechanism (32); the feeding mechanism (20) includes a material guide plate (21), and a plurality of material bins (22) for placing workpieces are arranged around the material guide plate (21), and the material bins (22) are made of non-metallic materials. The double-sided precision grinding machine further includes a control system (60) for controlling the operation of the grinding wheel mechanism (10), the feeding mechanism (20) and the electric adjustment mechanism (30).

2. The double-sided precision grinding machine according to claim 1, characterized in that: The first transmission mechanism (32) comprises a screw rod (321) connected to the output shaft of the driving servo motor (33) and a threaded sleeve (322) fixed to the mounting seat (11), wherein the threaded sleeve (322) matches the screw rod (321).

3. The double-sided precision grinding machine according to claim 1, characterized in that: The material guide plate (21) and the material bin (22) are separate bodies, and the material bin (22) is mounted on the material guide plate (21) by means of inlay.

4. The double-sided precision grinding machine according to claim 1, characterized in that: The feeding mechanism (20) also includes a material pressing device, which includes an adjusting wheel (23), a tensioning wheel (24) and an intermediate wheel (25) arranged on a bracket (110) in the frame (100); the adjusting wheel (23), the tensioning wheel (24) and the intermediate wheel (25) are arranged in a triangle; the adjusting wheel (23), the tensioning wheel (24) and the intermediate wheel (25) are connected by a pressure belt (26); the tensioning wheel (24) and the intermediate wheel (25) are arranged across the upper and lower sides of the material guide plate (21); the pressure belt between the tensioning wheel (24) and the intermediate wheel (25) at least partially presses on a part of the circumference of the material guide plate (21); and the tensioning wheel (24) is provided with an adjusting mechanism (27) for controlling its lateral movement.

5. The double-sided precision grinding machine according to claim 4, characterized in that: The pressing belt (26) is a belt or a narrow steel belt.

6. The double-sided precision grinding machine according to claim 1, characterized in that: The feeding mechanism (20) further comprises a first driving motor (28) and a second transmission mechanism (29) for driving the material guide plate (21); the first driving motor (28) is connected to the material guide plate (21) via the second transmission mechanism (29); and the second transmission mechanism (29) is a gear transmission system.

7. The double-sided precision grinding machine according to claim 1, characterized in that: The grinding wheel mechanism (10) comprises a second drive motor (12), a mounting shaft (13) and a grinding wheel disc (14); the mounting shaft (13) is mounted in a bearing seat of a mounting seat (11); the second drive motor (12) is connected to one end of the mounting shaft (13); the grinding wheel disc (14) is sleeved on the other end of the mounting shaft (13); a middle mounting inner hole (141) of the grinding wheel disc (14) is at least partially a conical surface; a conical cylindrical surface matching the conical surface of the inner hole of the grinding wheel disc (14) is provided at a position where the grinding wheel disc (14) is mounted on the mounting shaft (13); and a plurality of fixing screws (142) for fixing the grinding wheel disc (14) to the mounting shaft (13) are evenly distributed along the mounting inner hole (141).

8. The double-sided precision grinding machine according to claim 1, characterized in that: The double-sided precision grinding machine also includes a cooling water system (40), the cooling water system (40) including a circulation loop consisting of a water storage tank (41), a water pump (42), a water inlet pipeline (43), a nozzle (44) and a wastewater recovery pipeline (45), the nozzle (44) being arranged near a grinding station and spraying water toward the grinding station, the water storage tank (41) being divided into two water storage chambers by at least two layers of filter screens (46), the water inlet pipeline (43) and the wastewater recovery pipeline (45) being respectively connected to the two water storage chambers of the water storage tank (41).

9. The double-sided precision grinding machine according to claim 1, characterized in that: The double-sided precision grinding machine also includes a precision feeding mechanism (50), the precision feeding mechanism (50) including a material guide frame (51) arranged at a feeding position of a material guide plate (21), the material guide frame (51) being two guide plates arranged in parallel, and an adjusting device (52) for adjusting a gap of the material guide frame (51) being arranged between the material guide frames (51).

10. The double-sided precision grinding machine according to claim 9, characterized in that: The position where the material guide frame (51) discharges materials toward the material guide tray (21) is in the shape of a trumpet mouth that gradually contracts in the direction of the material guide tray (21).

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