Cylindrical grinding machine based on novel flexible abrasive belt

Abstract

The cylindrical grinding machine based on the novel flexible abrasive belt comprises a grinding wheel grinding machine base, a placing table, a clamp assembly and a grinding wheel grinding head, a positioning frame is arranged on the right side of the grinding wheel grinding machine base, a window is formed in the positioning frame, and an insertion opening communicated with the window is formed in the front end of the positioning frame. A limiting groove communicated with the window is formed in the rear portion of the positioning frame, a protective door for closing the window is inserted between the inserting opening and the limiting groove, the upper portion and the lower portion of the positioning frame are each provided with a connecting plate, and an abrasive belt tensioning assembly is hinged between the two connecting plates through a hinge assembly. The abrasive belt tensioning assembly comprises a grinding wheel tensioning cover, an abrasive belt positioning wheel, a telescopic air cylinder and a grinding wheel hinge seat, the left side of the grinding wheel tensioning cover is hinged to the connecting plate, the telescopic air cylinder is fixed in the grinding wheel tensioning cover, a piston rod of the telescopic air cylinder is provided with the grinding wheel hinge seat, and the grinding wheel hinge seat is hinged to the abrasive belt positioning wheel. A detachable flexible abrasive belt is connected between the abrasive belt positioning wheel and the grinding wheel grinding head in a sleeved mode. According to the structure, multiple purposes are achieved through one machine.

Description

Technical Field

[0001] The utility model belongs to the technical field related to grinding machines, in particular to an external cylindrical grinding machine based on a novel flexible abrasive belt. Background Art

[0002] Precision grinding and polishing is a processing technology that achieves very high processing accuracy and surface quality. It can achieve extremely high processing accuracy and meet the needs of high-precision parts in the fields of aerospace, automobile manufacturing, etc. Through the combined effects of micro-cutting, sliding and friction, low surface roughness values ​​can be obtained, and the surface finish and wear resistance of the workpiece can be improved. It plays a very important role in improving product precision, such as lithium voltage rollers, aircraft landing gear, laser engraving rollers, etc., and is also gradually being used in the processing of brittle and hard materials such as semiconductors. Existing domestic high-precision grinding machines are generally only equipped with a grinding wheel head (16), which can achieve high-precision dimensional processing. Due to the influence of equipment rigidity and grinding wheel wear, the surface roughness quality improvement is still lacking in stability. Even through fine dressing of the grinding wheel, the use of high-hardness abrasive grinding wheels such as diamond, etc., the efficiency is still relatively low, and defects such as chatter marks and scratches are easily generated, especially in the processing of hard and brittle materials. Therefore, the product needs to be ground again with a sanding belt in the later stage, so another sanding belt grinding and polishing machine is needed, which undoubtedly increases the processing cost of the equipment. Therefore, how to add a sanding belt grinding head function on the basis of the original grinding wheel grinder to realize a structure in which one device completes two functions to reduce the equipment cost? Moreover, replacing different grinding wheels and adjusting the clamping position again easily lead to the problem of secondary clamping error. Utility Model Content

[0003] The utility model aims to provide a cylindrical grinder based on a novel flexible abrasive belt, which solves the problem that the existing grinding equipment requires at least two sets of equipment, a grinding wheel grinder and an abrasive belt polisher, resulting in high equipment investment costs.

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model relates to an external cylindrical grinding machine based on a novel flexible abrasive belt, which comprises a grinding wheel grinding machine base. A placing table is arranged on the left side of the grinding wheel grinding machine base. A fixture assembly for fixing the product to be ground is arranged on the placing table. A grinding wheel head is hinged inside the grinding wheel grinding machine base. A positioning frame is arranged on the right side of the grinding wheel grinding machine base. A window is arranged on the positioning frame. An insertion port communicated with the window is arranged at the front end of the positioning frame. A limiting groove communicated with the window and aligned with the insertion port is arranged behind the positioning frame. A protective door for closing the window is inserted between the insertion port and the limiting groove. A connecting plate is arranged above and below the positioning frame respectively. A sand belt tensioning assembly is hinged between the two connecting plates through a hinge assembly. The sand belt tensioning assembly comprises a grinding wheel tensioning cover communicated with the inside of the grinding wheel grinding machine base on the left side, a sand belt positioning wheel, a telescopic cylinder and a grinding wheel hinge seat. The left side of the grinding wheel tensioning cover is hinged to the connecting plate. The telescopic cylinder is fixed inside the grinding wheel tensioning cover. A grinding wheel hinge seat is arranged on the piston rod of the telescopic cylinder. The sand belt positioning wheel is hinged to the grinding wheel hinge seat. A detachable flexible abrasive belt is sleeved between the sand belt positioning wheel and the grinding wheel head.

[0006] Preferably, in order to achieve the deviation correction effect and avoid the deviation of the flexible abrasive belt from affecting the grinding effect, deviation correction mechanisms for the flexible abrasive belt are further arranged at the front and rear of the left side of the grinding wheel grinding machine base. The deviation correction mechanisms are two groups of limiting components that are symmetrical front and back. Each group of limiting components comprises a lifting cylinder, a lifting rod and a deviation correction positioning plate. The lifting cylinder is fixed on the grinding wheel grinding machine base. The piston rod of the lifting cylinder is connected with the lifting rod. The deviation correction positioning plate is connected below the lifting rod. The side surface of the deviation correction positioning plate abuts against the side wall of the flexible abrasive belt.

[0007] Preferably, in order to further improve the tensioning effect and ensure the stability during grinding, a tensioning wheel is also hinged inside the grinding wheel tensioning cover.

[0008] Preferably, in order to improve safety, a protective cover plate is hinged at the front end of the grinding wheel grinding machine base, and a rubber contact sleeve is sleeved outside the grinding wheel head.

[0009] Preferably, in order to facilitate the fixing of the product, the fixture assembly comprises a motor base, a driving motor and a product pneumatic clamp. The motor base is fixed on the placing table. The driving motor is fixed on the motor base. The output shaft of the driving motor is connected with the product pneumatic clamp.

[0010] Preferably, for the convenience of later disassembly, the grinding wheel hinge seat comprises a "U"-shaped support. Hinge shafts are arranged on both sides of the sand belt positioning wheel. A hinge hole for inserting the hinge shaft is arranged on the left and right of the "U"-shaped support respectively. A hexagonal nut for positioning the hinge shaft in the hinge hole is threadedly connected to the hinge shaft.

[0011] Preferably, for easy operation, an operating handle is provided at the front end of the protective door.

[0012] The utility model has the following beneficial effects: the structure utilizes the stability and precision of the external cylindrical grinder, and adds a sanding belt tensioning assembly to the side of the grinding wheel grinder seat of the grinder, which can quickly realize a more efficient polishing function, and the arrangement can realize the completion of the initial grinding and fine grinding on the same set of equipment, so that the equipment cost is lower, and the workpiece can be clamped once to complete the process from grinding to polishing, and there is no need to replace the grinding wheel at a later stage, thereby avoiding the need to re-dress the grinding wheel when replacing it, or the secondary clamping error of the processing machine tool when replacing it, and can better ensure the high-precision requirements of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front structural schematic diagram of an external cylindrical grinder based on a novel flexible abrasive belt in Example 1 when the flexible abrasive belt is not installed and a protective door is installed;

[0014] Figure 2 This is a front structural schematic diagram of an external cylindrical grinder based on a novel flexible abrasive belt in Example 1 when a protective door is not installed and a flexible abrasive belt is installed;

[0015] Figure 3 This is a schematic diagram of the structure when no abrasive belt tensioning assembly is installed on the grinding wheel grinder seat in Example 1;

[0016] Figure 4 is a schematic structural diagram of the clamp assembly in Example 1;

[0017] Figure 5 It is a structural schematic diagram of the grinding wheel hinge seat in Example 1;

[0018] Figure 6 This is a front structural schematic diagram of an external cylindrical grinder based on a novel flexible abrasive belt in Example 2 when a protective door is not installed and a flexible abrasive belt is installed;

[0019] Figure 7 This is a front structural schematic diagram of an external cylindrical grinder based on a novel flexible abrasive belt in Example 3 when the flexible abrasive belt is not installed and a protective door and a protective cover are installed;

[0020] Figure 8 for Figure 7 Schematic diagram of the front structure without the protective cover installed;

[0021] Fig. 9 This is a schematic diagram of the side structure of the grinding wheel grinder seat in Example 4.

[0022] Reference numerals:

[0023] Grinding wheel grinding machine base 1, placing table 2, fixture assembly 3, motor base 301, driving motor 302, product pneumatic clamp 303, positioning frame 4, window 5, insertion port 6, limiting groove 7, protective door 8, connecting plate 9, hinge assembly 10, sand belt tensioning assembly 11, grinding wheel tensioning cover 12, sand belt positioning wheel 13, telescopic cylinder 14, grinding wheel hinge seat 15, "U"-shaped support 151, hinge hole 152, grinding wheel head 16, limiting assembly 17, lifting cylinder 171, lifting rod 172, deviation correction positioning plate 173, tensioning wheel 18, protective cover plate 19, rubber contact sleeve 20, hinge shaft 21, hexagonal nut 22, operating handle 23, flexible sand belt 24. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figure 1-5 As shown in the figure, an external cylindrical grinding machine based on a novel flexible sand belt disclosed in this embodiment includes a grinding wheel grinding machine base 1. A placing table 2 is arranged on the left side of the grinding wheel grinding machine base 1. A fixture assembly 3 for fixing the product to be ground is arranged on the placing table 2. A grinding wheel head 16 is hinged inside the grinding wheel grinding machine base 1. A positioning frame 4 is arranged on the right side of the grinding wheel grinding machine base 1. A window 5 is arranged on the positioning frame 4. An insertion port 6 communicating with the window 5 is arranged at the front end of the positioning frame 4. A limiting groove 7 communicating with the window 5 and aligned with the insertion port 6 is arranged behind the positioning frame 4. A protective door 8 closing the window 5 is inserted between the insertion port 6 and the limiting groove 7. A connecting plate 9 is arranged above and below the positioning frame 4 respectively. A sand belt tensioning assembly 11 is hinged between the two connecting plates 9 through a hinge assembly 10. The sand belt tensioning assembly 11 includes a grinding wheel tensioning cover 12 communicating with the inside of the grinding wheel grinding machine base 1 on the left side, a sand belt positioning wheel 13, a telescopic cylinder 14 and a grinding wheel hinge seat 15. The left side of the grinding wheel tensioning cover 12 is hinged to the connecting plate 9. The telescopic cylinder 14 is fixed inside the grinding wheel tensioning cover 12. A grinding wheel hinge seat 15 is arranged on the piston rod of the telescopic cylinder 14. The sand belt positioning wheel 13 is hinged to the grinding wheel hinge seat 15. A detachable flexible sand belt 24 is sleeved between the sand belt positioning wheel 13 and the grinding wheel head 16.

[0027] Preferably, to facilitate the fixing of the product, the fixture assembly 3 includes a motor base 301, a driving motor 302, and a pneumatic product clamp 303. The motor base 301 is fixed on the placing table 2, the driving motor 302 is fixed on the motor base 301, and the output shaft of the driving motor 302 is connected to the pneumatic product clamp 303. During operation, the pneumatic product clamp 303 is used to pneumatically clamp the product to be polished, and then the driving motor 302 is driven to work, driving the product to rotate and being cooperated with the grinding wheel head 16 to polish the periphery of the product.

[0028] Preferably, for the convenience of later disassembly, the grinding wheel hinge seat 15 includes a "U"-shaped support 151. Hinge shafts 21 are arranged on both sides of the abrasive belt positioning wheel 13. A hinge hole 152 for inserting the hinge shaft 21 is arranged on each of the left and right sides of the "U"-shaped support 151. A hexagonal nut 22 for positioning the hinge shaft 21 in the hinge hole 152 is threadedly connected to the outside of the hinge shaft 21. In the above structure, it is convenient to disassemble the hexagonal nut 22.

[0029] Preferably, for convenient operation, an operation handle 23 is arranged at the front end of the protective door 8. By arranging the operation handle 23, it is convenient to take the protective door 8.

[0030] The working principle of this structure is as follows: When rough grinding is realized, the product to be ground is placed on the fixture assembly 3, and the motor on the side of the grinding wheel head 16 is driven to work, driving the grinding wheel head 16 to rotate to perform rough grinding on the product to be ground. During rough grinding, the abrasive belt tensioning assembly 11 on the side does not work and can be rotated to the rear of the grinding wheel bed base 1. At this time, the window 5 is closed with the protective door 8. When fine grinding is required, the protective door 8 can be removed, and then the abrasive belt tensioning assembly 11 is rotated to a state flush with the grinding wheel bed base 1. Then, a suitable flexible abrasive belt 24 is selected. One end of the flexible abrasive belt 24 is sleeved outside the grinding wheel head 16, and the other end is sleeved outside the abrasive belt positioning wheel 13. The telescopic cylinder 14 is driven to work to keep the flexible abrasive belt 24 in a tensioned state. Then, the motor on the side of the grinding wheel head 16 is driven to work, driving the grinding wheel head 16 to rotate, and synchronously driving the flexible abrasive belt 24 to perform fine grinding on the product to be ground in this way. Therefore, by utilizing the stability and precision of the cylindrical grinding machine, the abrasive belt tensioning assembly 11 is added to the side of the grinding wheel bed base 1 of the grinding machine, and a more efficient polishing function can be quickly realized. It is set that rough grinding and fine grinding can be completed on the same set of equipment, making the equipment cost lower, and the workpiece can complete the process from grinding to polishing with one-time clamping, and there is no need to replace the grinding wheel later, thus avoiding the need for re-truing when replacing the grinding wheel or the secondary clamping error of replacing the processing machine tool, and better ensuring the high-precision requirements of processing. This structure has the following technical effects:

[0031] 1. Based on the original grinding wheel head 16 of the grinder, the side of the grinding wheel grinder seat 1 is modified and replaced considering the rear space, and the space for the parts for installing the flexible abrasive belt 24 to tighten the abrasive belt is increased to ensure the grinding and polishing requirements of wet grinding;

[0032] 2. A diamond grinding wheel can be directly used as the grinding belt positioning wheel 13. After the rough grinding of the grinding wheel is completed, the grinding belts of different grain sizes can be directly assembled for step-by-step processing. The workpiece can be clamped once to achieve the functions of rough grinding, fine grinding and polishing.

[0033] 3. High efficiency and high precision: The whole structure is easy to operate, with fast processing speed, can accurately control the processing volume and surface roughness, and has high surface quality. This makes precision belt grinding have significant advantages in situations where high-precision processing is required.

[0034] 4. Good reliability and stability: The operation of abrasive belt grinding is simple, and it can be operated for processing different materials (just rotate different flexible abrasive belts 24), avoiding errors caused by processing, making the processing effect stable, high-precision, and with good repeatability.

[0035] 5. Wide applicability: This structure has excellent processing effects on different materials, whether it is metal, ceramic, glass or plastic and other different materials can be processed, and can achieve good surface processing effects, with a wide range of adaptability.

[0036] 6. Good grinding quality: When using flexible abrasive belt 24 for grinding, the contact surface is small, the friction heat is small, and the abrasive grains have a long heat dissipation time interval, which can effectively reduce the deformation and burning of the workpiece, so the processing accuracy is high. At the same time, the abrasive belt is in flexible contact during grinding, and has multiple functions such as good grinding, lapping and polishing, so that the surface processing quality roughness value is small and the residual stress state is good.

[0037] 7. High processing efficiency: Since the abrasive grains of the flexible abrasive belt 24 are uniform in size and distribution and have good contour properties, the material deformation is small during grinding, the removal rate is high, the grinding force and the resulting grinding heat are small, and the grinding temperature is low, thereby improving the processing efficiency.

[0038] 8. High process flexibility: Precision belt grinding can select different abrasive belts and grinding parameters according to the different materials and requirements of the workpiece to achieve the best processing effect. This flexibility enables precision belt grinding to adapt to various complex and special processing requirements.

[0039] Example 2

[0040] See also Figure 6As shown, the present embodiment discloses an external cylindrical grinder based on a novel flexible abrasive belt. Preferably, the tensioning effect is further improved to ensure stability during grinding. A tensioning wheel 18 is also hinged in the grinding wheel tensioning cover 12. The tensioning effect on the flexible abrasive belt 24 is improved by adding the tensioning wheel 18 to ensure stability during grinding.

[0041] Example 3

[0042] See also Figure 7-8 As shown, the present embodiment discloses an external cylindrical grinder based on a novel flexible abrasive belt. Preferably, in order to improve safety, a protective cover plate 19 is hinged at the front end of the grinding wheel grinder seat 1. The protective cover plate 19 can improve the safety of the grinding wheel head 16 when it rotates. A rubber contact sleeve 20 is arranged on the outer sleeve of the grinding wheel head 16. In the above structure, the rubber contact sleeve 20 is elastic, which improves the friction between the grinding wheel head 16 and the flexible abrasive belt 24, thereby improving the fixing effect of the flexible abrasive belt 24 and further improving safety.

[0043] Example 4

[0044] See also Fig. 9 As shown, the embodiment discloses a cylindrical grinder based on a novel flexible abrasive belt. Preferably, the correction effect is achieved to prevent the flexible abrasive belt 24 from deviating and affecting the grinding effect. A correction mechanism for correcting the flexible abrasive belt 24 is also provided at the front and rear of the left side of the grinding wheel grinder seat 1. The correction mechanism comprises two groups of limit assemblies 17 that are symmetrical front and back. Each group of limit assemblies 17 comprises a lifting cylinder 171, a lifting rod 172 and a correction positioning plate 173. The lifting cylinder 171 is fixed on the grinding wheel grinder seat 1. The piston rod of the lifting cylinder 171 is connected to the lifting rod 172, and the lower part of the lifting rod 172 is connected to the correcting positioning plate 173. The side of the correcting positioning plate 173 is against the side wall of the flexible sanding belt 24. The above structure is set up to drive the lifting cylinder 171 to work, drive the correcting positioning plate 173 to move downward, and position the side of the flexible sanding belt 24 sleeved on the grinding wheel head 16, so as to realize the correcting operation of the flexible sanding belt 24 during its rotation, so as to avoid the flexible sanding belt 24 from deviating and affecting the grinding effect.

[0045] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A cylindrical grinding machine based on a novel flexible abrasive belt, comprising a grinding wheel grinding machine seat (1), a placing table (2) being arranged on the left side of the grinding wheel grinding machine seat (1), a clamping assembly (3) for fixing a belt grinding product being arranged on the placing table (2), a grinding wheel grinding head (16) being hingedly connected inside the grinding wheel grinding machine seat (1), characterized in that: On the right side of the described grinding wheel grinder base (1), there is a positioning frame (4). A window (5) is provided on the positioning frame (4). At the front end of the positioning frame (4), there is an insertion port (6) communicating with the window (5). At the rear of the positioning frame (4), there is a limiting groove (7) communicating with the window (5) and aligned with the insertion port (6). A protective door (8) that closes the window (5) is inserted between the insertion port (6) and the limiting groove (7). On the upper and lower parts of the positioning frame (4), there is a connecting plate (9) respectively. Between the two connecting plates (9), there is a sand belt tensioning assembly (11) hinged by a hinge assembly (10). The sand belt tensioning assembly (11) includes a grinding wheel tensioning cover (12) with its left side communicating with the inside of the grinding wheel grinder base (1), a sand belt positioning wheel (13), a telescopic cylinder (14), and a grinding wheel hinge seat (15). The left side of the grinding wheel tensioning cover (12) is hinged to the connecting plate (9). The telescopic cylinder (14) is fixed inside the grinding wheel tensioning cover (12). A grinding wheel hinge seat (15) is provided on the piston rod of the telescopic cylinder (14). The sand belt positioning wheel (13) is hinged to the grinding wheel hinge seat (15). A detachable flexible sand belt (24) is sleeved between the sand belt positioning wheel (13) and the grinding wheel head (16).

2. According to claim 1, a cylindrical grinding machine based on a novel flexible abrasive belt is characterized in that: On the front and rear of the left side of the grinding wheel grinder base (1), there is also a deviation correction mechanism for correcting the deviation of the flexible sand belt (24). The deviation correction mechanisms are two groups of limiting components (17) that are symmetric front and rear. Each group of limiting components (17) includes a lifting cylinder (171), a lifting rod (172), and a deviation correction positioning plate (173). The lifting cylinder (171) is fixed on the grinding wheel grinder base (1). The piston rod of the lifting cylinder (171) is connected to the lifting rod (172). The lower part of the lifting rod (172) is connected to the deviation correction positioning plate (173). The side of the deviation correction positioning plate (173) abuts against the side wall of the flexible sand belt (24).

3. The cylindrical grinding machine based on the novel flexible abrasive belt according to claim 1 is characterized in that: A tensioning wheel (18) is also hinged inside the grinding wheel tensioning cover (12).

4. The cylindrical grinding machine based on the novel flexible abrasive belt according to claim 1 is characterized in that: A protective cover plate (19) is hinged at the front end of the grinding wheel grinder base (1). A rubber contact sleeve (20) is sleeved outside the grinding wheel head (16).

5. The cylindrical grinding machine based on the novel flexible abrasive belt according to claim 4 is characterized in that: The fixture assembly (3) includes a motor base (301), a driving motor (302), and a product pneumatic clamp (303). The motor base (301) is fixed on the placing table (2). The driving motor (302) is fixed on the motor base (301). The output shaft of the driving motor (302) is connected to the product pneumatic clamp (303).

6. The cylindrical grinding machine based on the novel flexible abrasive belt according to claim 1 is characterized in that: The grinding wheel hinge seat (15) includes a "U"-shaped support (151). Hinge shafts (21) are provided on both sides of the sand belt positioning wheel (13). On the left and right of the "U"-shaped support (151), there is a hinge hole (152) for inserting the hinge shaft (21). A hexagonal nut (22) that positions the hinge shaft (21) inside the hinge hole (152) is threadedly connected to the hinge shaft (21).

7. The cylindrical grinding machine based on the novel flexible abrasive belt according to claim 1 is characterized in that: An operating handle (23) is provided at the front end of the protective door (8).

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