Gear key groove secondary processing device

Abstract

The present application relates to a kind of gear key groove secondary processing device, including workbench, gear loading mechanism, press mechanism, tool jacking mechanism, gear loading mechanism includes tray, gear clamping assembly, lower support barrel, the center of gear clamping assembly is equipped with first round hole, the center of tray is equipped with second round hole, lower support barrel includes cylindrical barrel and the ring of being located at the upper portion of cylindrical barrel, ring is consistent with the inside of first round hole, cylindrical barrel is consistent with the inside of second round hole, gap exists between ring and tray, support frame is provided in the lower portion of workbench, gear loading mechanism is contacted with support frame in the process of moving, the lower surface of lower support barrel.The present application is applied to gear key groove secondary repair work, greatly reduces repair cost, improves repair efficiency, can maximum degree reduce the working intensity of worker, so that worker saves time and effort, more efficient input operation, with higher application and popularization value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear manufacturing and processing, and particularly relates to a gear key groove secondary processing device. BACKGROUND

[0002] In the gear manufacturing process, the gear tooth heat treatment is a key process for improving the mechanical properties of the gear. Through the heat treatment processes such as carburizing and quenching and induction quenching, the load capacity and wear resistance of the gear are significantly improved. At present, in the process of improving the hardness, strength and wear resistance of the gear tooth of the blank by heat treatment, due to the heat, the key groove structure of the center part of the gear will be deformed due to the heat, so that the width of the key groove changes. Statistical data shows that the width change of the key groove of a medium-sized gear with a diameter of 200mm after the heat treatment process can reach 0.15-0.3mm, which is far beyond the tolerance range of ±0.025mm of IT8 level precision requirement.

[0003] For the cutting repair work of the gear key groove, if the key groove is reprocessed on the machine tool, the high-precision numerical control machine tool equipment needs to be restarted, which is high in cost and also affects the production rhythm of the original new gear, resulting in the decline of the overall efficiency of the production line, especially in the batch repair scene, the efficiency loss will be exponentially magnified. SUMMARY

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

[0005] The present application is realized by the following technical solutions:

[0006] A gear key groove secondary processing device, comprising a workbench, a gear loading mechanism slidingly connected to the surface of the workbench, a press-fitting mechanism arranged above the workbench, and a cutter jacking mechanism arranged below the workbench, the gear loading mechanism comprising a tray slidingly connected to the workbench, a gear clamping assembly arranged above the tray, and a lower support barrel arranged below the tray, a first circular hole is arranged at the center of the gear clamping assembly, a second circular hole concentric with the first circular hole is arranged at the center of the tray, the lower support barrel penetrates the first circular hole and the second circular hole, the lower support barrel is open at the upper and lower ends, comprising a cylindrical barrel body and a circular ring fixedly connected to the outer side of the upper part of the cylindrical barrel body, the outer wall of the circular ring is fitted with the inner side of the first circular hole, the outer wall of the cylindrical barrel body is fitted with the inner side of the second circular hole, there is a gap between the circular ring and the tray, a support frame is arranged at the lower part of the workbench, and the lower surface of the lower support barrel is in contact with the support frame during the movement of the gear loading mechanism.

[0007] According to the technical scheme, preferably, the support frame comprises a support plate arranged below the pressing mechanism and a side frame fixedly connected to the side of the support plate, and the upper surface of the side frame is provided with a nylon sliding strip, and the support plate is aligned with the upper surface of the nylon sliding strip of the side frame.

[0008] According to the technical scheme, preferably, the tray is fixedly connected with a reinforcing sheath at the lower portion, and the reinforcing sheath is sleeved on the outer surface of the lower support barrel.

[0009] According to the technical scheme, preferably, the gear clamping assembly comprises a clamping disc capable of rotating on the tray, and four positioning columns located between the clamping disc and the tray, and rotating the clamping disc can make the positioning columns approach or move away from the first circular hole.

[0010] According to the technical scheme, preferably, the surface of the tray is provided with four groups of sliding tracks, which are circumferentially arranged outside the second circular hole, and the sliding tracks are linear sliding tracks respectively pointing to the center of the second circular hole, the positioning columns penetrate the sliding tracks and are slidably connected with the sliding tracks, and the positioning columns can be locked through bolt cooperation, and the surface of the clamping disc is provided with four groups of arc-shaped holes, and the four positioning columns penetrate the arc-shaped holes respectively.

[0011] According to the technical scheme, preferably, the lower support barrel is provided with a cutter receiving barrel, the cutter receiving barrel is provided with a cutter receiving plate on the bottom surface, and a plurality of chip grooves are formed in the cutter receiving plate.

[0012] According to the technical scheme, preferably, the inside of the cutter receiving barrel is a variable-diameter structure, and the inner diameter of the upper portion of the cutter receiving barrel is greater than the inner diameter of the lower portion of the cutter receiving barrel.

[0013] According to the technical scheme, preferably, the cutter lifting mechanism comprises a lifting platform fixedly installed below the workbench through a connecting column, a top cutter cylinder installed on the lifting platform, and a top cutter supporting plate installed at the end of the top cutter cylinder, the lower end surface of the lower support barrel is open, and the top cutter supporting plate can penetrate the opening of the lower end surface of the lower support barrel and drive the cutter receiving barrel to move upward.

[0014] According to the technical scheme, preferably, the pressing mechanism comprises a pressing head connecting piece, a pressing head fixedly connected below the pressing head connecting piece, and a righting assembly sleeved outside the pressing head, the righting assembly comprises a righting sleeve sleeved outside the pressing head and a righting spring connected between the righting sleeve and the pressing head connecting piece, the lower side of the righting sleeve is open, and the opening of the righting sleeve is circumferentially provided with a chamfered surface.

[0015] According to the technical scheme, preferably, the gear loading mechanism is provided with two groups, which are alternately moved below the pressing mechanism.

[0016] The beneficial effects of the present application are:

[0017] In order to improve production quality and production efficiency, according to the characteristics of gear and keyway and process characteristics, the application provides a gear keyway secondary processing device, which is applied to gear keyway secondary repair work, has scientific and reasonable structure design, is easy to realize, greatly reduces repair cost, improves repair efficiency, can greatly reduce the working intensity of workers, saves time and labor of workers, is more efficient in operation, and has high application and popularization value.

[0018] At the same time, in the pressing process, the bottom surface of the lower supporting barrel is attached to the supporting plate at the lower part of the workbench when reaching the pressing station, and there is a gap between the lower supporting barrel and the tray, so that the pressing force is transmitted from the lower supporting barrel to the supporting plate of the supporting frame in the pressing process, effectively preventing the linear slide rail from being damaged by stress in the pressing process.

[0019] In addition, the righting assembly in the pressing mechanism can guide the cutter before the pressing head exerts force, effectively preventing the cutter from deviating when placed in the keyway of the gear, so that the pressing is not correct in the pressing process, and the gear workpiece keyway is damaged, further ensuring the gear machining quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the application.

[0021] Figure 2 is a schematic diagram of the three-dimensional structure of the application. Figure One .

[0022] Figure 3 is a schematic diagram of the three-dimensional structure of the gear loading mechanism part of the application.

[0023] Figure 4 is a schematic diagram of the three-dimensional structure of the lower supporting barrel, clamping disc and tray of the application.

[0024] Figure 5 is a schematic diagram of the three-dimensional structure of the tray part of the application.

[0025] Figure 6 is a schematic diagram of the three-dimensional structure of the positioning column and the connecting part of the tray of the application.

[0026] Figure 7 is a schematic diagram of the three-dimensional structure of the clamping disc part of the application.

[0027] Figure 8 is a schematic diagram of the three-dimensional structure of the clamping disc and the lower supporting barrel of the application.

[0028] Figure 9 is a schematic diagram of the three-dimensional structure of the clamping disc and the lower supporting barrel of the application.

[0029] Figure 10It is the perspective structure section view of the gear loading mechanism part of the present application.

[0030] Figure 11 It is the front view structure section view of the lower supporting barrel, clamping disc and tray of the present application.

[0031] Figure 12 It is the partial structure perspective of the present application Figure Two .

[0032] Figure 13 It is the front view structure schematic diagram of the supporting frame part of the present application.

[0033] Figure 14 It is the perspective structure schematic diagram of the connecting position of the side frame and the lower supporting barrel of the present application.

[0034] In the figure: 1, workbench; 2, cutter; 3, gear to be repaired; 4, gear loading mechanism; 5, pressing mechanism; 6, blade; 7, cutter shaft; 8, clamping disc; 9, tray; 10, slide rail; 11, reinforcing sheath; 12, lower supporting barrel; 13, quick-change supporting ring; 14, cylindrical barrel body; 15, circular ring; 16, slide; 17, positioning column; 18, protective sleeve; 19, rectangular notch; 20, locking piece; 21, locking bolt; 22, first circular hole; 23, arc-shaped hole; 24, pressing head connecting piece; 25, righting spring; 26, pressing head; 27, righting sleeve; 28, chamfered surface; 29, cutter receiving barrel; 30, cutter receiving plate; 31, cutter jacking mechanism; 32, nylon slide strip; 33, side frame; 34, supporting plate; 35, jacking platform; 36, cutter jacking cylinder; 37, cutter jacking plate. DETAILED DESCRIPTION

[0035] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and the best embodiment. All other embodiments obtained by those skilled in the art on the basis of the embodiments of the present application without creative labor belong to the scope of protection of the present application.

[0036] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, it needs to be explained that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] As shown in the figure, the present application comprises a workbench 1, a gear loading mechanism 4 slidingly 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 upper surface of the workbench 1 is provided with a sliding rail 10, and the tray 9 is slidingly connected to the sliding rail 10. In this example, the gear loading mechanism 4 is preferably driven by a cylinder to move below the pressing mechanism 5 or move away from below the pressing mechanism 5. In addition, in this example, the gear loading mechanism 4 is preferably but not limited to arranged in two groups, which are alternately moved below the pressing mechanism 5 respectively, to ensure the continuity of the device operation and improve the production efficiency.

[0039] The gear loading mechanism 4 comprises a tray 9 slidingly 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. The center of the gear clamping assembly is provided with a first circular hole 22, and the center of the tray 9 is provided with a second circular hole concentric with the first circular hole 22. 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 upper and lower ends, comprising a cylindrical barrel 14 and a circular ring 15 fixedly connected to the outer side of the upper part of the cylindrical barrel 14. The outer wall of the circular ring 15 is in close contact with the inner side of the first circular hole 22, and the outer wall of the cylindrical barrel 14 is in close contact with the inner side of the second circular hole. There is a gap between the circular ring 15 and the tray 9. The lower part of the workbench 1 is provided with a support frame. During the movement of the gear loading mechanism 4, the lower surface of the lower support barrel 12 is in contact with the support frame.

[0040] Specifically, the support frame comprises a support plate 34 arranged below the pressing mechanism 5 and a side frame 33 fixedly connected to the side of the support plate 34, and the upper surface of the side frame 33 is provided with a nylon sliding strip 32, wherein the nylon sliding strip 32 serves to reduce the abrasion of the bottom of the lower support barrel 12 during movement, and the support plate 34 is aligned with the upper surface of the nylon sliding strip 32 of the side frame 33. During the pressing process, when the lower support barrel 12 reaches the pressing station, the bottom surface of the lower support barrel 12 is in close contact with the support plate 34 at the lower part of the workbench 1, and there is a gap between the lower support barrel 12 and the tray 9, so that the pressing force is transmitted from the lower support barrel 12 to the support plate 34 of the support frame during the pressing process, and the linear sliding rail 10 only serves as a guide and does not serve as a support, thereby effectively preventing the linear sliding rail 10 from being damaged by stress during the pressing process. In addition, 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 support barrel 12, which serves 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 being tilted during movement.

[0041] The gear clamping assembly comprises a clamping disc 8 capable of rotating on the tray 9, four positioning columns 17 between the clamping disc 8 and the tray 9, a first circular hole 22 arranged at the center of the clamping disc 8, and a hand wheel arranged on the upper surface of the clamping disc 8 for an operator to rotate the clamping disc 8, so that the positioning columns 17 are close to or away from the first circular hole 22. In addition, the positioning columns 17 are externally provided with protective sleeves 18 for protecting the external teeth of the gear from being damaged.

[0042] Specifically, the tray 9 in this example is provided with four groups of sliding grooves 16 arranged circumferentially outside the second circular hole, and the sliding grooves 16 are straight sliding grooves 16 respectively pointing to the center of the second circular hole. The positioning columns 17 penetrate through the sliding grooves 16 and are in sliding connection with the sliding grooves 16, and can be locked by screw cooperation. The surface of the clamping disc 8 is provided with four groups of arc-shaped holes 23, and the four positioning columns 17 penetrate through the arc-shaped holes 23 respectively. In this example, the positioning columns 17 are internally threadedly connected with locking bolts 21, the lower part of the locking bolts 21 is threadedly connected with locking pieces 20, and the lower part of the sliding grooves 16 is provided with a rectangular notch 19 consistent with the direction of the sliding grooves 16. The locking pieces 20 are located in the rectangular notch 19, and when the locking bolts 21 are tightened, the locking pieces 20 do not rotate and are tightly connected with the sliding grooves 16 upward, thereby realizing the locking of the positioning columns 17 and the sliding grooves 16.

[0043] The gear clamping assembly mainly rotates the clamping disc 8 by hand to simultaneously move the four positioning columns 17 inwardly / outwardly, and locks the positions of the clamping disc 8, the clamping disc 8 and the tray 9 by screw / nut locking principle, so as 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 and being offset during movement.

[0044] In addition, the quick-change support ring 13 is detachably connected to the upper part of the circular ring 15 of the lower support barrel 12 in this example. The detachable connection in this example is preferably but not limited to bolt cooperation. Since the gear to be machined varies in size, the design can replace the quick-change support ring 13 with an opening size that matches the gear size, so that gears of different specifications and sizes can be stably placed above the gear clamping assembly.

[0045] The tool receiving barrel 29 is arranged in the lower support barrel 12, and the tool receiving plate 30 is placed on the bottom surface of the tool receiving barrel 29. A plurality of chip grooves are formed in the tool receiving plate 30. In this example, the tool receiving barrel 29 is placed inside the lower support barrel 12 to receive the tool 2. The tool receiving barrel 29 is used to receive the tool 2 and cutting chips that fall off, so as to protect the tool 2 from damage and collect the chips to prevent pollution of the working environment. In addition, it should be noted that the inside of the tool receiving barrel 29 is a variable-diameter structure, and the inner diameter of the upper part of the tool receiving barrel 29 is greater than the inner diameter of the lower part of the tool receiving barrel 29. Because the lower part has a small inner diameter, the variable-diameter part is transitioned by a slope, so that the tool shaft 7 of the falling tool 2 will not be excessively inclined in the tool receiving barrel 29. It can be ensured that when the tool receiving barrel 29 is lifted upward, the end of the tool 2 will protrude from the surface of the gear loading mechanism 4, which is convenient for the operator to take out.

[0046] Meanwhile, 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 below the workbench 1 through a connecting column, a tool lifting cylinder 36 installed on the lifting platform 35, and a tool lifting plate 37 installed at the end of the tool lifting cylinder 36. The lower end surface of the lower support barrel 12 is open, and the tool lifting plate 37 can penetrate through the opening of the lower end surface of the lower support barrel 12 and drive the tool receiving barrel 29 to move upward, so that the tool 2 protrudes from the surface of the gear loading mechanism 4, which is convenient for the operator to take out.

[0047] The pressing mechanism 5 includes a pressing head connecting piece 24, a pressing head 26 fixedly connected below the pressing head connecting piece 24, and a centralizing assembly sleeved outside the pressing head 26. The pressing mechanism 5 further includes a driving device for power output during the pressing process. In this example, the driving device is preferably but not limited to a power output device such as an electric cylinder, a pneumatic cylinder, or an oil cylinder. The pressing head connecting piece 24 is used to connect the pressing head 26 and the movable end of the power output device. The centralizing assembly includes a centralizing sleeve 27 sleeved outside the pressing head and a centralizing spring 25 connected between the centralizing sleeve 27 and the pressing head connecting piece 24. The lower side of the centralizing sleeve 27 is open, and the opening of the centralizing sleeve 27 is circumferentially provided with a chamfered surface 28. When the pressing head 26 is about to reach above the tool 2, if the tool 2 inserted in the workpiece has an angle deviation, the chamfered surface 28 at the opening of the centralizing sleeve 27 will centralize the tool 2, so that the force is vertical during the pressing process, and the repair quality of the key groove of the gear workpiece is ensured.

[0048] In actual work, the gear to be repaired 3 is placed on the surface of the gear clamping assembly for fixation, and then the cutter 2 is inserted in the keyway (wherein the cutter 2 includes a cutter shaft 7 and a cutter blade 6, and the cutter 2 is cut and repaired in the keyway under the action of downward force in the press-fitting process), the left and right air cylinders can respectively move the left and right two gear loading mechanisms 4 through the slide rails 10 to the center press-fitting position (below the press-fitting mechanism 5), the press-fitting mechanism 5 presses downward the cutter 2 to complete the cutting and repairing of the keyway, at this time the cutter 2 falls into the cutter receiving barrel 29, the gear loading mechanism 4 is moved to one side, and the repaired gear with the keyway is manually taken away, then the cutter receiving barrel 29 is moved upward through the cutter jacking mechanism 31, so as to facilitate manual taking away of the cutter 2 in the cutter receiving barrel 29.

[0049] In summary, in order to improve the production quality and production efficiency, according to the characteristics of the gear and the keyway and the process characteristics, the application provides a gear keyway secondary processing device, which is applied to gear keyway secondary repairing work, has a scientific and reasonable structure design, is easy to realize, greatly reduces the repairing cost, improves the repairing efficiency, can greatly reduce the working intensity of workers, saves time and labor of workers, and is more efficient in work, and has high application and promotion value. At the same time, in the press-fitting process, the bottom surface of the lower supporting barrel is attached to the supporting plate below the workbench when reaching the press-fitting station, and there is a gap between the lower supporting barrel and the tray, so that the pressure is transmitted from the lower supporting barrel to the supporting plate of the supporting frame in the press-fitting process, effectively preventing the linear slide rail from being damaged under stress in the pressing process. In addition, the righting assembly in the press-fitting mechanism can guide the cutter before the press-fitting head exerts force, effectively preventing the cutter from deviating when placed in the keyway of the gear, so as to prevent the gear workpiece keyway from being damaged in the press-fitting process, and further ensure the gear processing quality.

[0050] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A gear keyway secondary processing device applied to gear keyway secondary repair work, characterized in that, The gear loading mechanism (4) includes a tray (9) slidingly connected with the workbench (1), a gear clamping assembly arranged above the tray (9), and a lower support barrel (12) arranged below the tray (9), and the upper surface of the workbench (1) is provided with a sliding rail (10), the tray (9) is slidingly connected on the sliding rail (10), a first circular hole (22) is arranged at the center of the gear clamping assembly, a second circular hole concentric with the first circular hole (22) is arranged 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 the upper and lower 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) is fitted with the inner side of the first circular hole (22), the outer wall of the cylindrical barrel body (14) is fitted with the inner side of the second circular hole, and a gap exists between the circular ring (15) and the tray (9), The lower part of the workbench (1) is provided with a support frame, and the lower surface of the lower support barrel (12) is in contact with the support frame during the movement of the gear loading mechanism (4), the support frame includes a support plate (34) arranged below the pressing mechanism (5) and a side frame (33) fixedly connected to the side of the support plate (34), and the upper surface of the side frame (33) is provided with a nylon sliding strip (32), and the nylon sliding strip (32) on the upper surface of the support plate (34) and the side frame (33) is aligned, During the pressing process, the bottom surface of the lower support barrel (12) is fitted with the support plate (34) of the lower part of the workbench (1) when it reaches the pressing station, and a gap exists between the circular ring (15) of the lower support barrel (12) and the tray (9), so that the pressure is transmitted from the lower support barrel (12) to the support plate (34) of the support frame during the pressing process, preventing the linear sliding rail (10) from being damaged by stress during the pressing process, The pressing mechanism (5) includes a pressing head connecting piece (24), a pressing head (26) fixedly connected below the pressing head connecting piece (24), and a centralizing assembly sleeved outside the pressing head (26), the centralizing assembly includes a centralizing sleeve (27) sleeved outside the pressing head, and a centralizing spring (25) connected between the centralizing sleeve (27) and the pressing head connecting piece (24), the lower side of the centralizing sleeve (27) is open, and the opening of the centralizing sleeve (27) is annularly provided with a chamfered surface (28), which can guide the tool before the pressing head (26) is forced, ​ The lower support barrel (12) is provided with a cutter receiving barrel (29), the bottom surface of the cutter receiving barrel (29) is provided with a cutter receiving plate (30), a plurality of chip grooves are formed in the cutter receiving plate (30), the inside of the cutter receiving barrel (29) is of a variable diameter structure, the inside diameter of the upper part of the cutter receiving barrel (29) is greater than the inside diameter of the lower part of the cutter receiving barrel (29), and the end of the cutter (2) extends out of the surface of the gear loading mechanism (4) when the cutter receiving barrel (29) is lifted upward.

2. The gear keyway secondary processing device according to claim 1, characterized in that, The tray (9) is fixedly connected with a reinforcing sheath (11) at the lower part, and the reinforcing sheath (11) is sleeved on the outer surface of the lower support barrel (12).

3. The gear keyway secondary processing device according to claim 1, characterized in that, The gear clamping assembly comprises a clamping disc (8) capable of rotating on the tray (9), four positioning columns (17) between the clamping disc (8) and the tray (9), and the clamping disc (8) is rotated to enable the positioning columns (17) to approach or move away from the first circular hole (22).

4. The gear keyway secondary processing device according to claim 3, characterized in that, The surface of the tray (9) is provided with four groups of sliding grooves (16) which are circumferentially arranged outside the second circular hole, the sliding grooves (16) are linear sliding grooves (16) which respectively point to the center of the second circular hole, the positioning columns (17) penetrate through the sliding grooves (16) and are in sliding connection with the sliding grooves (16), and the positioning columns (17) can be locked through bolt cooperation, The surface of the clamping disc (8) is provided with four groups of arc-shaped holes (23), and the four positioning columns (17) penetrate through the arc-shaped holes (23) respectively.

5. The gear keyway secondary processing device according to claim 1, characterized in that, The cutter lifting mechanism (31) comprises a lifting platform (35) fixedly installed below the workbench (1) through a connecting column, a top cutter air cylinder (36) installed on the lifting platform (35), and a top cutter supporting plate (37) installed at the end of the top cutter air cylinder (36), The lower end surface of the lower support barrel (12) is open, and the top cutter supporting plate (37) can penetrate through the opening of the lower end surface of the lower support barrel (12) and drive the cutter receiving barrel (29) to move upward.

6. The gear keyway secondary processing apparatus according to any one of claims 1 to 5, characterized by The gear loading mechanism (4) is provided with two groups which are alternately moved below the pressing mechanism (5).

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