Secondary machining device for gear key groove

Abstract

The gear key groove secondary machining device comprises a workbench, a gear loading mechanism, a press-fitting mechanism and a tool jacking mechanism, the gear loading mechanism comprises a tray, a gear clamping assembly and a lower supporting barrel, a first round hole is formed in the center of the gear clamping assembly, a second round hole is formed in the center of the tray, and the lower supporting barrel is arranged in the first round hole; the lower supporting barrel comprises a cylindrical barrel body and a circular ring arranged on the upper portion of the cylindrical barrel body, the circular ring is attached to the inner side of the first circular hole, the cylindrical barrel body is attached to the inner side of the second circular hole, a gap exists between the circular ring and the tray, and a supporting frame is arranged on the lower portion of the workbench. The lower surface of the lower supporting barrel makes contact with the supporting frame. The gear key groove secondary repairing device is applied to gear key groove secondary repairing work, the repairing cost is greatly reduced, the repairing efficiency is improved, the working intensity of workers can be reduced to the maximum extent, the workers can put the device into operation more efficiently in a time-saving and labor-saving mode, and the device has high application and popularization value.

Description

Technical Field

[0001] The invention relates to the technical field of gear manufacturing and processing, and in particular to a gear keyway secondary processing device. Background Art

[0002] In the gear manufacturing process, heat treatment of the gear is a key process to improve the mechanical properties of the gear. Through heat treatment processes such as carburizing and quenching, induction quenching, etc., the load-bearing capacity and wear resistance of the gear can be significantly improved. At present, in the process of heat treatment of the teeth of the blank gear to improve the hardness, strength and wear resistance, due to heat, the keyway structure in the center of the gear will deform due to heat, thereby changing the width of the keyway. Statistics show that after the heat treatment process, the keyway width of a medium-sized gear with a diameter of 200mm can change by 0.15-0.3mm, far exceeding the ±0.025mm tolerance range required by IT8 level precision.

[0003] For the cutting and repair work of the gear keyway, if the keyway is re-processed on the machine tool, the high-precision CNC machine equipment needs to be restarted, which is costly and will also affect the production rhythm of the original new gears, resulting in a decrease in the overall efficiency of the production line. Especially in the batch repair scenario, this efficiency loss will show an exponential amplification effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a gear keyway secondary processing device.

[0005] The present invention is achieved through the following technical solutions: The gear wheel assembly is a gear wheel assembly that is mounted on the workbench, and the gear wheel assembly is mounted on the workbench to move the gear wheel to the workbench.

[0006] According to the above technical solution, preferably, the support frame includes a support plate relatively arranged below the pressing mechanism and a side frame fixedly connected to the side of the support plate, and a nylon slide bar is arranged on the upper surface of the side frame, and the support plate is aligned with the upper surface of the nylon slide bar of the side frame.

[0007] According to the above technical solution, preferably, a reinforcing sheath is fixedly connected to the lower portion of the tray, and the reinforcing sheath is sleeved on the outer surface of the lower supporting barrel.

[0008] According to the above technical solution, preferably, the gear clamping assembly includes a clamping disc that can rotate on a tray, and four positioning columns located between the clamping disc and the tray, and rotating the clamping disc can make each of the positioning columns approach or move away from the first circular hole.

[0009] According to the above technical solution, preferably, four groups of slides are arranged on the surface of the tray, which are circumferentially arranged outside the second circular hole. The slides are straight slides, which point to the center of the second circular hole respectively. The positioning column passes through the slide and is slidably connected to the slide, and can be locked by bolts. Four groups of arc-shaped channels are arranged on the surface of the clamping disc, and the four positioning columns are respectively arranged through each arc-shaped channel.

[0010] According to the above technical solution, preferably, a knife receiving barrel is arranged in the lower supporting barrel, a knife receiving plate is placed on the bottom surface of the knife receiving barrel, and a plurality of debris grooves are formed on the knife receiving plate.

[0011] According to the above technical solution, preferably, the interior of the tool receiving barrel is a variable diameter structure, and the inner diameter of the upper inner part of the tool receiving barrel is greater than the inner diameter of the lower inner part of the tool receiving barrel.

[0012] According to the above technical solution, preferably, the tool lifting mechanism includes a lifting platform fixedly installed under the workbench through a connecting column, a top knife cylinder installed on the lifting platform, and a top knife support plate installed on the end of the top knife cylinder. The lower end surface of the lower support barrel is open, and the top knife support plate can pass through the opening of the lower end surface of the lower support barrel and support the tool receiving barrel to move upward.

[0013] According to the above technical solution, preferably, the press-fitting mechanism includes a press head connecting part, a press-fitting head fixedly connected to the bottom of the press head connecting part, and a straightening assembly sleeved outside the press head, the straightening assembly includes a straightening sleeve sleeved outside the press head, and a straightening spring connected between the straightening sleeve and the press head connecting part, the straightening sleeve has an opening on the lower side, and a chamfered cut surface is arranged around the opening of the straightening sleeve.

[0014] According to the above technical solution, preferably, the gear loading mechanism is provided with two groups, which are moved alternately to the bottom of the pressing mechanism.

[0015] The beneficial effects of the present invention are: In order to improve production quality and production efficiency, the present invention provides a gear keyway secondary processing device based on the characteristics of gears and keyways and process features, which is applied to the secondary repair of gear keyways. The structural design is scientific and reasonable, easy to implement, greatly reduces the repair cost, improves the repair efficiency, and can minimize the work intensity of workers, so that workers can save time and effort and work more efficiently, and has high application and promotion value. At the same time, during the press-fitting process, when the lower support barrel reaches the press-fitting station, its bottom surface fits with the support plate at the bottom of the workbench, and there is a gap between the lower support barrel and the tray, so that the pressure during the press-fitting process is transferred from the lower support barrel to the support plate of the support frame, effectively preventing the linear slide rail from being damaged by force during the press-fitting process; In addition, the straightening component in the press-fitting mechanism can guide the tool before the press-fitting head applies force, effectively preventing the tool from shifting when placed in the keyway of the gear, causing it to be pressed incorrectly during the press-fitting process and damaging the keyway of the gear workpiece, further ensuring the gear processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 The local structure of the present invention is three-dimensional Figure 1 .

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the gear loading mechanism part of the present invention.

[0019] Figure 4 It is a three-dimensional structural cross-sectional view of the lower support barrel, the clamping disc and the tray of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the tray part of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the connection between the positioning column and the tray of the present invention.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the clamping disc part of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the clamping disc and the lower supporting barrel of the present invention.

[0024] Fig. 9 It is a front structural cross-sectional view of the press-fitting mechanism part of the present invention.

[0025] Fig.10 It is a three-dimensional structural cross-sectional view of the gear loading mechanism part of the present invention.

[0026] Fig.11 It is a main structural cross-sectional view of the lower support barrel, the clamping disc and the tray of the present invention.

[0027] Fig.12 The local structure of the present invention is three-dimensional Figure 2 .

[0028] Fig.13 It is a schematic diagram of the main structure of the support frame part of the present invention.

[0029] Fig.14 It is a three-dimensional structural schematic diagram of the connection position between the side frame and the lower support barrel of the present invention.

[0030] In the figure: 1. workbench; 2. tool; 3. gear to be repaired; 4. gear loading mechanism; 5. press-fitting mechanism; 6. blade; 7. knife shaft; 8. clamping disc; 9. tray; 10. slide rail; 11. reinforced sleeve; 12. lower support barrel; 13. quick-change support ring; 14. cylindrical barrel; 15. ring; 16. slideway; 17. positioning column; 18. protective cover; 19. rectangular notch; 20. Locking plate; 21. Locking bolt; 22. First circular hole; 23. Arc-shaped channel; 24. Press head connector; 25. Straightening spring; 26. Press head; 27. Straightening sleeve; 28. Chamfered cut surface; 29. ​​Tool receiving barrel; 30. Tool receiving plate; 31. Tool lifting mechanism; 32. Nylon slide; 33. Side frame; 34. Support plate; 35. Lifting platform; 36. Top knife cylinder; 37. Top knife support plate. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the invention.

[0032] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] As shown in the figure, the present invention includes a workbench 1, a gear loading mechanism 4 slidably connected to the surface of the workbench 1, a pressing mechanism 5 arranged above the workbench 1, and a tool lifting mechanism 31 located below the workbench 1. A slide rail 10 is arranged on the upper surface of the workbench 1, and the tray 9 is slidably connected to the slide rail 10. In this example, it is preferred to use a cylinder to drive the gear loading mechanism 4 to move to the bottom of the pressing mechanism 5, or to move away from the bottom of the pressing mechanism 5. In addition, in this example, it is preferred but not limited to set two groups of gear loading mechanisms 4, which are moved alternately to the bottom of the pressing mechanism 5, respectively, to ensure the working continuity of the device and improve production efficiency.

[0035] The gear loading mechanism 4 includes a tray 9 slidably connected to the workbench 1, a gear clamping assembly arranged above the tray 9, and a lower support barrel 12 arranged below the tray 9. A first circular hole 22 is opened at the center of the gear clamping assembly, and a second circular hole concentric with the first circular hole 22 is opened at the center of the tray 9. The lower support barrel 12 passes through the first circular hole 22 and the second circular hole. The lower support barrel 12 is open at both ends, including a cylindrical barrel body 14 and a circular ring 15 fixedly connected to the outer side of the upper part of the cylindrical barrel body 14. The outer wall of the circular ring 15 fits with the inner side of the first circular hole 22, and the outer wall of the cylindrical barrel body 14 fits with the inner side of the second circular hole. There is a gap between the circular ring 15 and the tray 9. A support frame is arranged at the lower part of the workbench 1. When the gear loading mechanism 4 moves, the lower surface of the lower support barrel 12 contacts the support frame.

[0036] Specifically, the support frame includes a support plate 34 relatively arranged below the press-fitting mechanism 5 and a side frame 33 fixedly connected to the side of the support plate 34. The upper surface of the side frame 33 is provided with a nylon slide 32, wherein the nylon slide 32 is used to reduce the wear of the bottom of the lower support barrel 12 during the movement, and the support plate 34 is aligned with the upper surface of the nylon slide 32 of the side frame 33. During the press-fitting process, when the lower support barrel 12 reaches the press-fitting station, its bottom surface fits the support plate 34 at the bottom of the workbench 1, and there is a gap between the lower support barrel 12 and the tray 9, so that the pressure during the press-fitting process is transmitted from the lower support barrel 12 to the support plate 34 of the support frame, and the linear slide 10 only plays a guiding role but not a supporting role, which effectively prevents the linear slide 10 from being damaged by force during the pressing process. In addition, a reinforcing sleeve 11 is fixedly connected to the lower part of the tray 9. The reinforcing sleeve 11 is sleeved on the outer surface of the lower support barrel 12 to increase the contact area when the tray 9 drives the lower support barrel 12 to move, thereby preventing the lower support barrel 12 from tilting during the movement.

[0037] The gear clamping assembly includes a clamping disc 8 that can rotate on a tray 9, four positioning columns 17 located between the clamping disc 8 and the tray 9, a first circular hole 22 is opened at the center of the clamping disc 8, and a hand wheel is provided on the upper surface of the clamping disc 8 for the operator to hold and rotate the clamping disc 8. Rotating the clamping disc 8 can make each positioning column 17 approach or move away from the first circular hole 22. In addition, a protective cover 18 is provided outside the positioning column 17 to protect the external teeth of the gear from damage.

[0038] Specifically, in this example, four groups of slideways 16 are arranged on the surface of the tray 9, which are arranged circumferentially outside the second circular hole. The slideways 16 are straight slideways 16, which point to the center of the second circular hole respectively. The positioning column 17 passes through the slideway 16 and is slidably connected with the slideway 16, and can be locked by bolts. Four groups of arc-shaped holes 23 are arranged on the surface of the clamping disc 8, and four positioning columns 17 pass through each arc-shaped hole 23. In this example, a locking bolt 21 is threadedly connected to the inner part of the positioning column 17, and a locking plate 20 is threadedly connected to the lower part of the locking bolt 21. A rectangular notch 19 that is consistent with the direction of the slideway 16 is arranged below the slideway 16, and the locking plate 20 is located in the rectangular notch 19. When the locking bolt 21 is tightened, the locking plate 20 does not rotate with it and is tightly connected to the slideway 16 upward, thereby realizing the locking of the positioning column 17 and the slideway 16.

[0039] The gear clamping assembly mainly moves the four positioning columns 17 inward / outward at the same time by manually rotating the clamping disc 8, and locks the positions of the clamping disc 8, the clamping disc 8 and the tray 9 through the screw / nut locking principle. It is used to place the gear workpiece, support the gear workpiece, make the gear workpiece concentric with the center of the tray 9, and prevent the gear workpiece from moving offset during the movement.

[0040] In addition, in this example, a quick-change support ring 13 is detachably connected to the upper part of the circular ring 15 of the lower support barrel 12. The detachable connection method in this example is preferably but not limited to bolt cooperation. Since the gears to be processed are of different sizes, the present design can replace the quick-change support ring 13 with a matching opening size according to the size of the gear, thereby ensuring that gears of different specifications and sizes can be stably placed above the gear clamping assembly.

[0041] Among them, a tool receiving barrel 29 is arranged in the lower support barrel 12, and a tool receiving plate 30 is placed on the bottom surface of the tool receiving barrel 29, and a plurality of debris grooves are opened on the tool receiving plate 30. In this example, a tool receiving barrel 29 for receiving the tool 2 is placed inside the lower support barrel 12, which is used to receive the tool 2 and cutting debris that are pressed down and fall, so as to protect the tool 2 from damage and collect the debris to prevent pollution of the working environment. In addition, it should be noted that the interior of the tool receiving barrel 29 in this example is a variable diameter structure, and the inner diameter of the upper part of the tool receiving barrel 29 is larger than the inner diameter of the lower part of the tool receiving barrel 29. Since the inner diameter of the lower part is small, the variable diameter part is transitioned with a slope, so that the knife shaft 7 of the fallen tool 2 will not be excessively tilted in the tool receiving barrel 29, which can ensure that when the tool receiving barrel 29 is lifted upward, the end of the tool 2 will extend out of the surface of the gear loading mechanism 4, which is convenient for the operator to take it out.

[0042] At the same time, the tool lifting mechanism 31 is arranged on the side of the vertical projection of the pressing mechanism 5. The tool lifting mechanism 31 includes a lifting platform 35 fixedly installed under the workbench 1 through a connecting column, a top knife cylinder 36 installed on the lifting platform 35, and a top knife support plate 37 installed at the end of the top knife cylinder 36. The lower end surface of the lower support barrel 12 is open, and the top knife support plate 37 can pass through the opening of the lower end surface of the lower support barrel 12 and support the tool receiving barrel 29 to move upward, so that the tool 2 extends out of the surface of the gear loading mechanism 4, which is convenient for the operator to take it out.

[0043] The press-fitting mechanism 5 includes a press-fitting head connector 24, a press-fitting head 26 fixedly connected to the bottom of the press-fitting head connector 24, and a straightening assembly sleeved outside the press-fitting head 26. The press-fitting mechanism 5 also includes a driving device for outputting force during the press-fitting process. In this example, it is preferably but not limited to power output devices such as electric cylinders, air cylinders, and oil cylinders. The press-fitting head connector 24 is used to connect the press-fitting head 26 and the movable end of the power output device. The straightening assembly includes a straightening sleeve 27 sleeved outside the press-fitting head, and a straightening spring 25 connected between the straightening sleeve 27 and the press-fitting head connector 24. The straightening sleeve 27 has an opening at the bottom, and a chamfered cut surface 28 is arranged around the opening of the straightening sleeve 27. When the press-fitting head 26 is about to reach the top of the tool 2, if the tool 2 inserted on the workpiece has an angle deviation, the chamfered cut surface 28 at the opening of the straightening sleeve 27 will straighten the tool 2, so that the force is vertical during the pressing process, ensuring the repair quality of the keyway of the gear workpiece.

[0044] In actual work, the gear 3 to be repaired is placed on the surface of the gear clamping assembly for fixation, and then the tool 2 is inserted into the keyway (wherein the tool 2 includes a tool shaft 7 and a blade 6, and is subjected to a downward force during the press-fitting process to complete the cutting and repair of the keyway). The cylinders on the left and right sides of the table can respectively move the left and right gear loading mechanisms 4 to the central press-fitting position (below the press-fitting mechanism 5) through the slide rails 10. The press-fitting mechanism 5 presses the tool 2 downward to complete the cutting and repair of the keyway. At this time, the tool 2 falls into the tool receiving barrel 29, and the gear loading mechanism 4 moves to one side. After manually taking away the gear with the repaired keyway, the tool receiving barrel 29 is moved up through the tool lifting mechanism 31 to facilitate manual removal of the tool 2 in the tool receiving barrel 29.

[0045] In summary, in order to improve production quality and production efficiency, the present invention provides a gear keyway secondary processing device based on the characteristics of gears and keyways and process characteristics, which is applied to the secondary repair of gear keyways. The structural design is scientific and reasonable, easy to implement, greatly reduces the repair cost, improves the repair efficiency, and can minimize the work intensity of workers, so that workers can save time and effort and invest in operations more efficiently, and has a high application and promotion value. At the same time, during the press-fitting process, when the lower support barrel reaches the press-fitting station, its bottom surface fits the support plate at the bottom of the workbench, and there is a gap between the lower support barrel and the tray, so that the pressure during the press-fitting process is transmitted from the lower support barrel to the support plate of the support frame, effectively preventing the linear slide from being damaged by force during the pressing process. In addition, the straightening component in the press-fitting mechanism can guide the tool before the press-fitting head applies force, effectively preventing the tool from being offset when placed in the keyway of the gear, so that the press-fitting process is not correct, and then the gear workpiece keyway is damaged, further ensuring the gear processing quality.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gear keyway secondary processing device, characterized in that: The invention comprises a workbench (1), a gear loading mechanism (4) slidably connected to the surface of the workbench (1), a pressing mechanism (5) arranged above the workbench (1), and a tool lifting mechanism (31) located below the workbench (1). The gear loading mechanism (4) comprises a tray (9) slidably connected to the workbench (1), a gear clamping assembly arranged above the tray (9), and a lower support barrel (12) arranged below the tray (9); a first circular hole (22) is opened at the center of the gear clamping assembly; a second circular hole concentric with the first circular hole (22) is opened at the center of the tray (9); the lower support barrel (12) penetrates the first circular hole (22) and the second circular hole; the lower support barrel (12) is open at both ends, and comprises a cylindrical barrel body (14) and a circular ring (15) fixedly connected to the outer side of the upper part of the cylindrical barrel body (14); the outer wall of the circular ring (15) is in contact with the inner side of the first circular hole (22); the outer wall of the cylindrical barrel body (14) is in contact with the inner side of the second circular hole; there is a gap between the circular ring (15) and the tray (9); A support frame is provided at the lower part of the workbench (1), and during the movement of the gear loading mechanism (4), the lower surface of the lower support barrel (12) contacts the support frame.

2. A gear keyway secondary processing device according to claim 1, characterized in that: The support frame comprises a support plate (34) arranged relatively below the pressing mechanism (5) and a side frame (33) fixedly connected to the side of the support plate (34); a nylon slide bar (32) is arranged on the upper surface of the side frame (33); the support plate (34) is aligned with the upper surface of the nylon slide bar (32) of the side frame (33).

3. A gear keyway secondary processing device according to claim 2, characterized in that: The lower part of the tray (9) is fixedly connected with a reinforcing sheath (11), and the reinforcing sheath (11) is sleeved on the outer surface of the lower supporting barrel (12).

4. The gear keyway secondary processing device according to claim 1, characterized in that: The gear clamping assembly comprises a clamping disc (8) that can rotate on a tray (9) and four positioning columns (17) located between the clamping disc (8) and the tray (9). By rotating the clamping disc (8), each of the positioning columns (17) can be moved closer to or farther from the first circular hole (22).

5. A gear keyway secondary processing device according to claim 4, characterized in that: The surface of the tray (9) is provided with four groups of slideways (16), which are respectively arranged outside the second circular hole in a circumferential manner. The slideways (16) are linear slideways (16) and respectively point to the center of the second circular hole. The positioning column (17) passes through the slideway (16) and is slidably connected to the slideway (16), and can be locked by bolts. Four groups of arc-shaped holes (23) are arranged on the surface of the clamping disc (8), and the four positioning posts (17) are respectively arranged to penetrate each arc-shaped hole (23).

6. The gear keyway secondary processing device according to claim 1, characterized in that: A knife receiving barrel (29) is arranged in the lower support barrel (12), a knife receiving plate (30) is placed on the bottom surface of the knife receiving barrel (29), and a plurality of debris grooves are formed on the knife receiving plate (30).

7. A gear keyway secondary processing device according to claim 6, characterized in that: The interior of the knife receiving barrel (29) is a variable diameter structure, and the inner diameter of the upper inner portion of the knife receiving barrel (29) is greater than the inner diameter of the lower inner portion of the knife receiving barrel (29).

8. The gear keyway secondary processing device according to claim 6, characterized in that: The tool lifting mechanism (31) comprises a lifting platform (35) fixedly mounted below the workbench (1) via a connecting column, a tool lifting cylinder (36) mounted on the lifting platform (35), and a tool lifting support plate (37) mounted on the end of the tool lifting cylinder (36). The lower end surface of the lower support barrel (12) is open, and the top knife support plate (37) can penetrate the opening of the lower end surface of the lower support barrel (12) and support the knife receiving barrel (29) to move upward.

9. The gear keyway secondary processing device according to claim 1, characterized in that: The press-fitting mechanism (5) comprises a press-fitting head connecting member (24), a press-fitting head (26) fixedly connected to the lower side of the press-fitting head connecting member (24), and a straightening assembly sleeved outside the press-fitting head (26). The straightening assembly comprises a straightening sleeve (27) sleeved outside the pressure head, and a straightening spring (25) connected between the straightening sleeve (27) and the pressure head connecting piece (24); the straightening sleeve (27) has an opening at the bottom, and a chamfered cut surface (28) is arranged around the opening of the straightening sleeve (27).

10. The gear keyway secondary processing device according to any one of claims 1 to 9, characterized in that: The gear loading mechanism (4) is provided with two groups, which are moved alternately to the bottom of the pressing mechanism (5).

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