A large-scale CNC profile gear grinding machine

Abstract

The present invention relates to the technical field of gear processing machine tools, and in particular to a large-scale CNC forming gear grinding machine, comprising a bed, a column, a vertical feed carriage, a transition box, a grinding head, a rotary table, an X-axis feed system, a Z-axis feed system, an A-axis drive system and a C-axis drive system; the body is provided with the column, the X-axis feed system is arranged on one side of the column, the X-axis feed system is arranged on the bed, the Z-axis feed system is arranged on the column, and the vertical feed carriage is arranged on the Z-axis feed system; the switching efficiency between the external gear grinding state and the internal gear grinding state of the present invention is high, the repeatability and precision are good, and one machine can be used for two purposes, thereby reducing the manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of gear processing machine tools, and in particular to a large-scale numerically controlled forming gear grinding machine. Background Art

[0002] At present, large-sized (diameter over 2000mm, tooth width over 500mm) hardened gears with high precision on the market all adopt the forming grinding process, which requires corresponding large-sized CNC forming grinding machines for processing. Generally, internal gears are processed by internal grinding machines, and external gears are processed by external grinding machines. There is also a type of grinding machine that uses double columns, double grinding heads, and shares a turntable. One side is for external grinding heads to grind external teeth, and the other side is for internal grinding heads to grind internal teeth. Both methods have the problems of high investment costs and large plant footprint, and are not suitable for the processing needs of small batches of large-sized internal and external gears.

[0003] The large-scale CNC forming gear grinding machine of the present invention is developed to meet the needs of the segmented market. It is a special equipment for finishing large-diameter, large-tooth-width hard-toothed gears, which can reduce investment costs and obtain maximum benefits. Summary of the invention

[0004] The purpose of the present invention is to provide a large-scale CNC forming gear grinding machine to solve the gear grinding machine used for processing internal and external gears proposed in the above background technology. One is to use two machines separately, and the other is to use a combination of processing different gears on both sides. Both methods have the problems of high investment cost and large factory area, and are not suitable for the processing needs of small batches of large-scale internal and external gears.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a large-scale CNC forming gear grinding machine, including a bed 1, a column 3, a vertical feed pallet 6, a transition box 7, a grinding head 8, a rotary table 9, an X-axis feed system 2, a Z-axis feed system 4, an A-axis drive system 5 and a C-axis drive system 10; the bed 1 is provided with the column 3, the X-axis feed system 2 is arranged on one side of the column 3, the X-axis feed system 2 is arranged on the bed 1, the Z-axis feed system 4 is arranged on the column 3, the vertical feed pallet 6 is arranged on the Z-axis feed system 4, the A-axis drive system 5 is arranged above the vertical feed pallet 6, the rotary table 9 is arranged in front of the bed 1, and the C-axis drive system 10 is arranged at the lower side of the rotary table 9. The A-axis drive system 5 is arranged on the vertical feed pallet 6, which can reduce the structural design complexity and failure rate of the grinding head 8, while reducing the weight of the grinding head 8 and improving the overall structural rigidity when grinding internal teeth.

[0006] The grinding head 8 is divided into an inner gear grinding head 801 and an outer gear grinding head 802. The inner gear grinding head 801 is mounted on the transition box 7 and then fixed on the vertical feed support plate 6. The outer gear grinding head 802 is directly mounted and fixed on the vertical feed support plate 6. The inner gear grinding head 801 is fixed on the transition box 7 with an inner grinding head cylindrical pin 12. The transition box 7 is mounted on the vertical feed support plate 6 with a transition box cylindrical pin 11. The outer gear grinding head 802 is fixed on the vertical feed support plate 6 with a grinding head fixing pin 13.

[0007] The grinding head 8 is provided with a grinding head drag chain 14 and a grinding head drag chain bracket 15, wherein the grinding head drag chain 14 is arranged at the top of the grinding head 8, and the grinding head drag chain bracket 15 is arranged below the grinding head drag chain 14. The arrangement of the grinding head drag chain 14 facilitates the process of rotating the grinding head 8 180 degrees without disassembling electrical cables, hydraulic pipelines and cooling pipelines, etc., thereby reducing workload, lowering technical requirements for operation, and reducing error links.

[0008] The grinding head 8 includes a grinding head box 16, a W-axis feeding system 17, a Y-axis feeding system 18, a dressing system 40 and a grinding wheel system 50. The Y-axis feeding system 18 is arranged on the dressing system 40 to further reduce the interference between the grinding head 8 and the internal gear.

[0009] The dressing system 40 includes a dressing spindle drive system 19, a dressing bracket 20, a dressing spindle 21, a diamond roller 22, a dressing system synchronous pulley 26 and a dressing system synchronous belt 27; the dressing system synchronous pulley 26 is respectively arranged on the dressing spindle drive system 19 and the diamond roller 22, and the dressing system synchronous belt 27 is arranged on the dressing system synchronous pulley 26.

[0010] The grinding wheel system 50 includes a grinding wheel 23, a grinding wheel spindle 24, a grinding wheel spindle drive system 25 and a plum blossom coupling 28. The grinding wheel spindle drive system 25 is connected to the grinding wheel spindle 24 through the plum blossom coupling 28. The grinding wheel spindle 24 is provided with the grinding wheel 23. The grinding wheel spindle 24 and the grinding wheel spindle drive system 25 are respectively located on both sides of the grinding wheel 23, and the structure is compact, which can effectively reduce the interference between the grinding head 8 and the gear. The grinding wheel spindle 24 is directly fixed on the grinding head box 16, which is more rigid and has better stability. At the same time, the grinding wheel spindle drive system 25 is installed on the guide rail, which can be as shown in FIG. Fig.10 As shown in the figure, the gear 22 slides to the left, so that the plum blossom coupling 28 on the side of the grinding wheel 23 can be separated, and the freed space can facilitate the replacement of the grinding wheel 23.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention adopts a precise positioning structure, an optimized drag chain layout and a compact grinding head structure, which improves the efficiency, repeatability and accuracy of the switching between the internal and external grinding states, can achieve dual-purpose use of one machine, and reduce manufacturing costs. A precise positioning structure with the combined effect of the chamfering pin and the end face is designed between the transition box and the vertical feed support plate of the present invention, as well as between the transition box and the grinding head. It has high disassembly and assembly efficiency, good repeatability and positioning accuracy, and reduces the adjustment workload after the calibration of the forming grinding accuracy. The grinding head drag chain layout of the present invention has been optimized and designed. During the rotation of the grinding head by 180 degrees, there is no need to disassemble and assemble electrical cables, hydraulic pipelines and cooling pipelines, etc., which reduces the workload, reduces the technical requirements for operation, and reduces the error links. The grinding head of the present invention adopts a more compact structural design. The grinding wheel spindle and the grinding wheel spindle drive system are respectively located on both sides of the grinding wheel. The structure is compact, ensuring less interference between the grinding wheel spindle and the internal gear, and can support the grinding of gears with a minimum inner diameter of 1200mm. The grinding head of the present invention adopts a more compact structural design, and the Y-axis moving mechanism is arranged on the dressing mechanism, which further reduces the interference between the grinding head and the internal gear. The grinding wheel spindle is directly fixed on the grinding head box, which is more rigid and has better stability. The A-axis rotating structure of the present invention is arranged on the vertical feed support plate, which reduces the structural design complexity and failure rate of the grinding head, while reducing the weight of the grinding head and improving the overall structural rigidity when grinding internal teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the overall side plane structure of the present invention;

[0015] Figure 3 This is a schematic diagram of the installation structure of the internal gear grinding head of the present invention;

[0016] Figure 4 This is a schematic diagram of the installation structure of the external gear grinding head of the present invention;

[0017] Figure 5 It is a schematic diagram of the side structure of the drag chain and the drag chain installation of the present invention;

[0018] Figure 6 Schematic diagram of the drag chain and the drag chain installation structure of the present invention

[0019] Figure 7 It is a schematic diagram of the overall internal structure of the grinding head of the present invention;

[0020] Figure 8 It is a structural schematic diagram of the trimming system of the present invention;

[0021] Fig. 9 It is a schematic diagram of the structure of the grinding wheel system of the present invention;

[0022] Fig.10 It is a schematic diagram of the grinding wheel replacement of the present invention.

[0023] In the figure: 1. bed; 2. X-axis feed system; 3. column; 4. Z-axis feed system; 5. A-axis drive system; 6. vertical feed pallet; 7. transition box; 8. grinding head; 801, internal gear grinding head; 802, external gear grinding head; 9. rotary table; 10. C-axis drive system; 11. transition box cylindrical pin; 12. internal grinding head cylindrical pin; 13. grinding head fixing pin; 14. grinding head drag chain; 15. grinding head drag chain support Frame; 16. Grinding head box; 17. W-axis feeding system; 18. Y-axis feeding system; 19. Dressing spindle driving system; 20. Dressing bracket; 21. Dressing spindle; 22. Diamond roller; 23. Grinding wheel; 24. Grinding wheel spindle; 25. Grinding wheel spindle driving system; 26. Dressing system synchronous pulley; 27. Dressing system synchronous belt; 28. Plum blossom coupling; 30. Gear; 40. Dressing system; 50. Grinding wheel system. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] A large-scale CNC forming gear grinding machine comprises a bed 1, a column 3, a vertical feed pallet 6, a transition box 7, a grinding head 8, a rotary table 9, an X-axis feed system 2, a Z-axis feed system 4, an A-axis drive system 5 and a C-axis drive system 10; the bed 1 is provided with the column 3, the X-axis feed system 2 is arranged on one side of the column 3, the X-axis feed system 2 is arranged on the bed 1, the Z-axis feed system 4 is arranged on the column 3, the vertical feed pallet 6 is arranged on the Z-axis feed system 4, the A-axis drive system 5 is arranged above the vertical feed pallet 6, the rotary table 9 is arranged in front of the bed 1, and the C-axis drive system 10 is arranged below the rotary table 9. The A-axis drive system 5 is arranged on the vertical feed pallet 6, which can reduce the structural design complexity and failure rate of the grinding head 8, while reducing the weight of the grinding head 8 and improving the overall structural rigidity when grinding internal teeth.

[0026] The grinding head 8 is divided into an inner gear grinding head 801 and an outer gear grinding head 802. The inner gear grinding head 801 is mounted on the transition box 7 and then fixed on the vertical feed support plate 6. The outer gear grinding head 802 is directly mounted and fixed on the vertical feed support plate 6. The inner gear grinding head 801 is fixed on the transition box 7 with an inner grinding head cylindrical pin 12. The transition box 7 is mounted on the vertical feed support plate 6 with a transition box cylindrical pin 11. The outer gear grinding head 802 is fixed on the vertical feed support plate 6 with a grinding head fixing pin 13.

[0027] The grinding head 8 is provided with a grinding head drag chain 14 and a grinding head drag chain bracket 15, wherein the grinding head drag chain 14 is arranged at the top of the grinding head 8, and the grinding head drag chain bracket 15 is arranged below the grinding head drag chain 14. The arrangement of the grinding head drag chain 14 facilitates the process of rotating the grinding head 8 180 degrees without disassembling electrical cables, hydraulic pipelines and cooling pipelines, etc., thereby reducing workload, lowering technical requirements for operation, and reducing error links.

[0028] The grinding head 8 includes a grinding head box 16, a W-axis feeding system 17, a Y-axis feeding system 18, a dressing system 40 and a grinding wheel system 50. The Y-axis feeding system 18 is arranged on the dressing system 40 to further reduce the interference between the grinding head 8 and the internal gear.

[0029] The dressing system 40 includes a dressing spindle drive system 19, a dressing bracket 20, a dressing spindle 21, a diamond roller 22, a dressing system synchronous pulley 26 and a dressing system synchronous belt 27; the dressing system synchronous pulley 26 is respectively arranged on the dressing spindle drive system 19 and the diamond roller 22, and the dressing system synchronous belt 27 is arranged on the dressing system synchronous pulley 26.

[0030] The grinding wheel system 50 includes a grinding wheel 23, a grinding wheel spindle 24, a grinding wheel spindle drive system 25 and a plum blossom coupling 28, and the grinding wheel spindle drive system 25 is connected to the grinding wheel spindle 24 via the plum blossom coupling 28. The grinding wheel spindle 24 and the grinding wheel spindle drive system 25 are respectively located on both sides of the grinding wheel 23 to ensure that the grinding wheel spindle 24 has less interference with the internal gear. The grinding wheel spindle 24 is directly fixed to the grinding head housing 16, which has higher rigidity and better stability. With this drive solution, the space is more compact, and the interference between the grinding head 8 and the gear can be effectively reduced. At the same time, the grinding wheel spindle drive system 25 is installed on the guide rail, which can be as shown Fig.10 As shown in the figure, the gear 22 slides to the left, so that the plum blossom coupling 28 on the side of the grinding wheel 23 can be separated, and the freed space can facilitate the replacement of the grinding wheel 23.

[0031] When processing the internal gear of the gear grinding machine, replace the internal gear grinding head 801, first use the crane to horizontally lift the external gear grinding head 802, then loosen the connecting bolts on the grinding head fixing pin 13 to disengage the grinding head fixing pin, and then rotate the external gear grinding head 802 180 degrees. At this time, the wire tube and the grinding head drag chain 14 rotate and deform 180 degrees together, and finally install the internal gear grinding head 801, fix the transition box 7 on the vertical feed pallet 6 through the transition box cylindrical pin 11, and then fix the internal gear grinding head 801 on the transition box 7 through the internal grinding head cylindrical pin 12. Repeat the operation without installing the transition box 7 when processing the external gear. When the grinding wheel 23 is replaced, the motor side synchronous pulley 31, the grinding wheel spindle synchronous belt and the grinding wheel side synchronous pulley 29 only need to pass through the movable guide rail, so that the grinding wheel side plum coupling 28 on the side of the grinding wheel 23 is separated and then the grinding wheel 23 is replaced.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the invention and are not intended to limit the present invention. Without departing from the novel spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A large-scale CNC profile gear grinding machine, characterized in that: The machine comprises a bed (1), a column (3), a vertical feed pallet (6), a transition box (7), a grinding head (8), a rotary table (9), an X-axis feed system (2), a Z-axis feed system (4), an A-axis drive system (5) and a C-axis drive system (10); the bed (1) is provided with the column (3), the X-axis feed system (2) is arranged on one side of the column (3), the X-axis feed system (2) is arranged on the bed (1), the Z-axis feed system (4) is arranged on the column (3), the vertical feed pallet (6) is arranged on the Z-axis feed system (4), and the A-axis drive system is arranged above the vertical feed pallet (6). (5), the rotary table (9) is provided in front of the bed (1), and the C-axis drive system (10) is provided at the lower side of the rotary table (9); the grinding head (8) is divided into an internal gear grinding head (801) and an external gear grinding head (802), the internal gear grinding head (801) is mounted on the transition box (7) and then fixed on the vertical feed support plate (6); the external gear grinding head (802) is directly mounted and fixed on the vertical feed support plate (6), the internal gear grinding head (801) is fixed on the transition box (7) by an internal grinding head cylindrical pin (12), and the transition box (7) is mounted on the vertical feed support plate (6) by a transition box cylindrical pin (11). The outer gear grinding head (802) is fixed on the vertical feed support plate (6) by a grinding head fixing pin (13); the grinding head (8) is provided with a grinding head drag chain (14) and a grinding head drag chain bracket (15); the grinding head drag chain (14) is arranged at the top of the grinding head (8), and the grinding head drag chain bracket (15) is arranged below the grinding head drag chain (14); the grinding head (8) comprises a grinding head box (16), a W-axis feeding system (17), a Y-axis feeding system (18), a dressing system (40) and a grinding wheel system (50); the dressing system (40) comprises a dressing spindle driving system (19), a dressing bracket (20), a dressing spindle (2 1), a diamond roller (22), a dressing system synchronous pulley (26) and a dressing system synchronous belt (27); the dressing system synchronous pulley (26) is respectively arranged on the dressing spindle drive system (19) and the diamond roller (22), and the dressing system synchronous belt (27) is arranged on the dressing system synchronous pulley (26); the grinding wheel system (50) comprises a grinding wheel (23), a grinding wheel spindle (24), a grinding wheel spindle drive system (25) and a plum blossom coupling (28); the grinding wheel spindle drive system (25) is connected to the grinding wheel spindle (24) via the plum blossom coupling (28), and the grinding wheel (23) is arranged on the grinding wheel spindle (24);When processing the internal gear of the gear grinding machine, the internal gear grinding head (801) is replaced, the external gear grinding head (802) is first hoisted horizontally using a crane, and then the connecting bolt on the grinding head fixing pin (13) is loosened to disengage the grinding head fixing pin, and then the external gear grinding head (802) is rotated 180 degrees. At this time, the wire tube and the grinding head drag chain (14) are rotated and deformed by 180 degrees together. Finally, the internal gear grinding head (801) is installed, and the transition box (7) is fixed to the vertical feed support plate (6) through the transition box cylindrical pin (11), and then the internal gear grinding head (801) is fixed to the transition box (7) through the internal grinding head cylindrical pin (12). When processing the external gear, the operation can be repeated without installing the transition box (7). ;

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