Gear fillet milling tool

Abstract

The invention relates to the technical field of gear milling, in particular to a gear fillet milling tool which comprises a disc-shaped mounting seat and a base, the mounting seat is connected with the base through bolts, the mounting seat is located on the upper side of the base, and a plurality of through holes and second-type mounting holes are formed in the upper end face and the lower end of the mounting seat in an annular array correspondingly. The through holes and the second-type mounting holes are the same in number and are coaxial, and the second-type mounting holes are counter bores; the multiple through holes are formed in the mounting base, the chuck, the sliding rod and the hydraulic assembly are arranged in the mounting base, the sliding rod is driven by the hydraulic assembly in a unified mode to clamp a gear blank, and therefore machining of multiple gears can be completed through single-time clamping, the clamping time of the gear blank is saved, and meanwhile when the gears of the same specification are machined, the machining efficiency is greatly improved. After the tooth surfaces of all gear blanks are machined in a unified mode, the circular beads of the gears are machined in a unified mode, the replacement time of a cutter is shortened, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gear milling, in particular to a gear fillet milling tool. Background Art

[0002] When a vertical CNC milling machine processes bevel gears or face gears, a profile milling cutter is generally used for tooth surface processing. Profile milling cutters focus more on cutting tooth surfaces, while fillet milling cutters or ball end milling cutters are generally used for gear fillet processing. Fillet milling cutters or ball end milling cutters focus more on the smoothness of chamfers. Therefore, tooth surface processing and gear fillet processing are usually divided into two steps. To ensure the processing accuracy of the gear, one clamping is usually used to complete the tooth surface processing and gear fillet processing.

[0003] Conventional tooling fixtures can only clamp a single gear blank at a time, and during the gear processing process, it is necessary to first complete the tooth surface processing with a forming milling cutter, and then replace the fillet milling cutter or ball end milling cutter to process the gear fillet, thereby completing the gear milling process. When processing multiple gears, the steps of disassembly, clamping and tool replacement are interspersed between single gears, reducing processing efficiency.

[0004] In response to the above problems, the prior art has proposed some solutions. For example, the utility model patent with patent application number CN202220853437.X provides a gear outer corner milling tool. The utility model patent opens a strip groove on the gear positioning frame, and slides a positioning rod in the strip groove. The positioning rod can move under the action of the hydraulic telescopic rod, and then cooperates with the semi-annular positioning plate to fix the gear to be processed; although this structure can fix multiple gears to be processed, this structure can only fix gears to be processed of the same specification. If gears of different specifications are proofed, it cannot meet the clamping requirements of multiple gears to be processed.

[0005] To this end, the present invention provides a gear fillet milling tool to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a gear fillet milling tool to solve the problem that conventional tools can only clamp a single gear blank, and when processing multiple gears, the steps of disassembly, clamping and tool replacement are interspersed between single gears, resulting in low work efficiency. At the same time, it solves the problem that the existing solutions cannot clamp gears of different specifications to be processed.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A gear fillet milling tool, comprising a mounting seat and a base, both of which are disc-shaped, the mounting seat and the base are connected by bolts, and the mounting seat is located on the upper side of the base, and a plurality of through holes and type-2 mounting holes are respectively provided in annular arrays on the upper end face and the lower end of the mounting seat, the number of the through holes and the type-2 mounting holes are the same and coaxial, the type-2 mounting holes are countersunk holes, and the through holes are connected to the type-2 mounting holes, the base is provided with a plurality of through holes, the plurality of through holes are through holes, the number of the through holes and the through holes are the same and coaxial, a chuck is coaxially arranged in the plurality of type-2 mounting holes, and the The chuck is annular, and the inner diameters of the through hole, the type II mounting hole and the through hole, and the inner and outer diameters of the chuck are D1, D2, D3, D4 and D5 respectively, wherein D1≤D4≤D3<D5<D2. The side wall of the chuck is provided with at least three type III mounting holes, and a plurality of the type III mounting holes completely penetrate the side wall of the chuck, and the axis centerline of the type III mounting hole is perpendicular to the axis centerline of the chuck. A sliding rod is slidably installed in the type III mounting hole, and one end of the sliding rod extends into the inner hole of the chuck. A hydraulic assembly is arranged in the mounting seat, and the hydraulic assembly is used to provide axial push-pull force for the plurality of sliding rods.

[0009] Through the arrangement of multiple through holes and chucks, before the gears are processed with tooth surfaces and gear fillets, multiple gear blanks are respectively inserted into the through holes, and then the hydraulic assembly is used to provide axial thrust for the slide bar, so as to increase the length of the slide bar extending into the inner hole of the chuck until the slide bar fits the outer wall of the shaft neck of the gear blank, and then the hydraulic assembly is used to increase the locking force of the slide bar on the shaft neck of the gear blank, thereby completing the tooling to clamp multiple gear blanks at a time, so that the processing of multiple gears can be completed in a single clamping, saving the clamping time of the gear blanks. At the same time, when processing gears of the same specification, the tooth surfaces of all gear blanks can be uniformly processed, and then the gear fillets can be uniformly processed, reducing the tool replacement time and improving the processing efficiency. Further, since each chuck is independent of each other, when clamping gear blanks of different specifications, multiple chucks can be adapted to the sizes of shaft necks of different specifications, thereby ensuring the applicable scope of the tooling and ensuring the clamping effect of the tooling when clamping gear blanks of different specifications at the same time.

[0010] Preferably, the hydraulic assembly includes a piston and an adjusting bolt, and an adjusting threaded hole and a type-one mounting hole are respectively provided on the upper end surface and the lower end surface of the mounting seat, the adjusting threaded hole, the type-one mounting hole and the mounting seat are coaxial, the type-one mounting hole is a countersunk hole, and the adjusting threaded hole is connected with the piston hole, the piston is coaxially slidably connected in the type-one mounting hole, the adjusting bolt is threadedly connected with the adjusting threaded hole, and the lower end of the adjusting bolt is fixedly connected with the piston, and a plurality of connecting channels are provided on the lower end surface of the mounting seat, and the plurality of connecting channels are all connected with the type-one mounting hole and the type-two mounting hole, and the height of the connecting channel is less than the thickness of the piston.

[0011] In the process of clamping the gear blank, first rotate the adjusting bolt to make the piston move upward with the adjusting bolt. At this time, the distance between the lower end surface of the piston and the upper end surface of the base increases, and negative pressure is formed in the cavity between the piston and the base. The hydraulic oil in the second type mounting hole flows into the first type mounting hole through the connecting channel under the action of negative pressure, and the amount of hydraulic oil in the second type mounting hole decreases. The slide rod is recovered into the chuck to compensate for the volume change of the hydraulic oil in the second type mounting hole, thereby completing the recovery of the slide rod into the chuck; after the shaft neck of the gear blank is inserted into the through hole, the adjusting bolt is rotated in the opposite direction to make the piston move downward with the adjusting bolt. At this time, the distance between the lower end surface of the piston and the base is reduced, and a positive pressure is formed in the cavity between the piston and the base. Under the action of the positive pressure, the hydraulic oil in the first type mounting hole enters the second type mounting hole through the connecting channel, and the amount of hydraulic oil in the second type mounting hole increases. The slide bar extends out of the chuck to compensate for the volume increase of the hydraulic oil in the second type mounting hole, thereby completing the pushing of the slide bar out of the chuck until the slide bar abuts against the outer wall of the shaft neck of the gear blank, and then rotates the adjusting bolt half a circle to two circles in the current rotation direction, thereby increasing the hydraulic pressure applied to the slide bar, thereby increasing the clamping force of the slide bar on the gear blank, thereby completing the clamping of the tooling on the gear blank. Through the arrangement of the adjusting bolt, the piston and the connecting channel, when clamping the gear blank, the hydraulic pressure on each slide bar is the same, that is, the clamping force applied by each slide bar on the gear blank is the same, which ensures the stability of the tooling clamping the gear blank, and at the same time ensures the coaxiality of the gear blank and the chuck.

[0012] Furthermore, by arranging the adjusting bolt on the upper side of the piston, there is no hydraulic oil in the cavity between the upper end surface of the piston and the upper end surface of the type-one mounting hole, and therefore no sealing requirement is required in the cavity, that is, there is no sealing requirement between the adjusting bolt and the adjusting threaded hole, and a conventional threaded connection can be selected. During processing, it is only necessary to ensure the sealing between the piston and the inner side wall of the type-one mounting hole, thereby reducing the processing difficulty and processing cost.

[0013] Furthermore, by setting the height of the connecting channel to be smaller than the thickness of the piston, it is prevented that when the piston follows the adjusting bolt to move until the lower end surface of the piston is in contact with the upper end surface of the base, the hydraulic oil in the connecting channel is prevented from leaking to the upper side of the piston through the connection between the connecting channel and the type one mounting hole, thereby ensuring the sealing of the hydraulic oil in the type one mounting hole, the connecting channel and the type two mounting hole, thereby ensuring the clamping stability of the tooling.

[0014] Preferably, the base is provided with a circular protrusion, a plurality of annular protrusions and a plurality of connecting protrusions, the circular protrusions, the annular protrusions and the connecting protrusions have the same height, and the height range is 1 to 3 mm, the circular protrusion is coaxially arranged with the base, the number of the plurality of annular protrusions and the plurality of connecting protrusions is the same as that of the type II mounting holes, the annular protrusion is annular, and the inner and outer diameters are respectively D6 and D7, D5<D6<D7<D2, the outer wall of the circular protrusion and the inner wall of the type I mounting hole, the inner wall of the annular protrusion and the chuck The fitting tolerances between the outer wall of the annular protrusion and the inner wall of the type II mounting hole, and the outer wall of the connecting protrusion and the inner wall of the connecting channel are all H7 / h6 or H8 / h7. The top and bottom of the type I mounting hole, the connecting channel and the type II mounting hole are provided with sealing chamfers. The upper and lower sides of the outer wall of the chuck are provided with positioning chamfers. The bottom edges of the circular protrusion, the connecting protrusion and the annular protrusion are provided with sealing bevels, wherein C0.8≤sealing chamfer=positioning chamfer<sealing bevel≤C1.5.

[0015] Since the type-one mounting hole, the type-two mounting hole and the connecting channel provided at the lower end of the mounting seat are all provided with pressurized hydraulic oil, in order to avoid leakage of the hydraulic oil between the mounting seat and the base, which causes loss of hydraulic oil and decrease in hydraulic pressure, higher requirements are placed on the sealing between the mounting seat and the base; and because the matching surface between the mounting seat and the base is a large plane, in order to meet the fit requirement between the lower end face of the mounting seat and the upper end face of the base, when processing the lower end face of the mounting seat and the upper end face of the base, the lower end face of the mounting seat and the upper end face of the base have higher requirements on flatness and surface roughness, which will increase the processing cost of the mounting seat and the base; for this reason, by A circular protrusion, a plurality of annular protrusions and a plurality of connecting protrusions are provided, and sealing bevels are provided on the bottom edges of the circular protrusions, the connecting protrusions and the annular protrusions, and closed chamfers are provided on the type-one mounting hole, the connecting channel and the type-two mounting hole. When the mounting seat and the base are matched, the sealing between the mounting seat and the base is ensured by the inclined surface matching between the sealing bevel and the closed chamfer, and the leakage of the hydraulic oil in the type-one mounting hole, the connecting channel and the type-two mounting hole is avoided, and the stability of the hydraulic pressure is ensured, thereby ensuring the clamping stability of the tooling; at the same time, the flatness and surface roughness requirements of the lower end of the mounting seat and the upper end surface of the base are reduced, thereby reducing the processing costs of the mounting seat and the base.

[0016] Furthermore, by providing positioning chamfers on the upper and lower sides of the outer wall of the chuck, when the mounting seat and the base are matched, the sealing bevel at the bottom of the inner wall of the annular protrusion cooperates with the positioning chamfer to ensure the sealing between the base and the chuck, and the sealing chamfer at the top of the type II mounting hole cooperates with the positioning chamfer to ensure the sealing between the mounting seat and the chuck. At the same time, the sealing bevel at the bottom of the inner wall of the annular protrusion cooperates with the positioning chamfer, and the sealing chamfer at the top of the type II mounting hole cooperates with the positioning chamfer, which has a centering effect on the chuck, ensuring the coaxiality of the chuck with the annular protrusion and the type II mounting hole.

[0017] Preferably, the mounting seat is provided with a mounting groove, the inner side wall of the mounting groove is equidistant from the inner wall of the type 1 mounting hole, the side wall of the connecting channel, and the inner wall of the type 2 mounting hole, the upper end face and the lower end face of the chuck are provided with an annular groove, the annular groove is coaxial with the chuck, and the annular groove and the mounting groove are provided with a rubber sealing ring, and the rubber sealing ring protrudes from the mounting groove and the annular groove by at least 0.5 mm. By setting the mounting groove, the annular groove and the sealing ring, the sealing between the mounting seat and the base is further strengthened, and the sealing between the chuck and the mounting seat and the base is also strengthened, so as to avoid leakage of the hydraulic oil in the type 1 mounting hole, the connecting channel and the type 2 mounting hole, thereby ensuring the stability of the hydraulic pressure and thus ensuring the clamping stability of the tooling.

[0018] Preferably, a protective ring is coaxially provided on the inner side wall of the chuck, the protective ring has the same height as the chuck, a plurality of through holes are opened on the side wall of the protective ring, the plurality of through holes are respectively coaxial with a plurality of sliding rods, the through holes and the sliding rods are interference fit, and the protective ring is made of elastic material.

[0019] When the tooling is clamping the gear blank, under the action of liquid pressure, part of the rod body of the slide rod extends out of the chuck. During the gear tooth surface processing and gear fillet processing, chips are likely to fall onto the slide rod. Since the slide rod and the three-type mounting hole are in a sliding connection, when the slide rod is recovered into the chuck, some chips are easily brought into the three-type mounting hole, which will not only cause the gap between the slide rod and the three-type mounting hole to be blocked and reduce the smoothness of the sliding between the slide rod and the three-type mounting hole, but also cause damage to the inner wall of the three-type mounting hole or the outer wall of the slide rod, thereby reducing the sealing between the slide rod and the three-type mounting hole; for this reason, a protective ring made of elastic material is set, and the through holes set on the side walls of the slide rod and the protective ring are interference fit. When the slide rod is retracted into the chuck, the protective ring scrapes off the chips on the outer wall of the slide rod, thereby avoiding the chips from being brought into the three-type mounting hole, thereby ensuring the smoothness and sealing between the slide rod and the three-type mounting hole.

[0020] Preferably, a blocking block is provided at one end of the slide rod extending into the inner hole of the chuck, the blocking block includes a connecting portion and a protruding portion, the connecting portion is bolted to the slider, the protruding portion extends to the upper side of the chuck, the side of the protruding portion close to the inner hole of the chuck is arc-shaped, and the axis line of the protruding portion is perpendicular to the axis line of the slide rod.

[0021] Due to the spacing between the slide bar and the upper end face of the mounting seat, when the lower end face of the shaft neck of the gear blank cannot extend to the axis line of the slide bar, the slide bar cannot provide sufficient clamping force for the gear blank or cannot clamp the gear blank; for this reason, through the setting of the clamping block, when the lower end face of the shaft neck of the gear blank cannot extend to the axis line of the slide bar, the slide bar is first driven out of the chuck by the driving assembly until the maximum spacing of the symmetrical protrusions in the same chuck is less than the diameter of the keyway hole of the gear blank, and then the slide bar is driven back into the chuck by the hydraulic assembly until one side of the arc-shaped protrusion is in contact with the inner wall of the keyway hole of the gear blank, and then hydraulic pressure is applied, thereby completing the clamping of the gear blank; thereby improving the clamping force of the tooling on such gear blanks, ensuring the clamping stability of the tooling, and at the same time improving the application range of the tooling.

[0022] Preferably, a plurality of positioning bosses are provided on the upper end surface of the mounting seat, the plurality of positioning bosses are respectively coaxial with the plurality of through holes, and the upper surfaces of the positioning bosses are hardened to 48-53 HRC.

[0023] During the clamping process of the gear blank, the gear blank can be vertically positioned by setting a pad between the upper surface of the mounting seat and the gear blank, but the pad and the mounting seat are independent of each other, and it is necessary to improve the flatness of the upper end face of the mounting seat to ensure the fit between the pad and the mounting seat, thereby increasing the processing difficulty and cost of the mounting seat; for this reason, by setting a positioning boss, when the gear blank is inserted into the mounting hole, the shoulder surface of the gear blank abuts against the upper end face of the positioning boss, thereby completing the vertical positioning of the gear blank, facilitating the positioning of the gear blank in the vertical direction, and at the same time, during processing, only the flatness and roughness of the upper end face of the positioning boss need to be ensured, thereby reducing the processing difficulty and cost; further, by hardening the upper surface of the positioning boss to 48-53HRC, the wear resistance of the positioning boss is improved, thereby ensuring the service life and positioning accuracy of the positioning boss.

[0024] Preferably, the side of the clamping block away from the slide rod and the arc-shaped side wall on the connecting portion are both provided with knurling, and the knurling is in a mesh pattern or a diagonal pattern. By providing the mesh or diagonal knurling on the clamping block, the friction between the clamping block and the clamped gear blank is increased, and relative sliding or rotation between the two is avoided when the clamping block clamps the gear blank, thereby ensuring the clamping stability of the tooling on the gear blank.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By arranging multiple through holes on the mounting seat, and arranging a chuck, a slide rod and a hydraulic component in the mounting seat, the hydraulic component drives the slide rod to clamp the gear blank, so that multiple gears can be processed in a single clamping, saving the clamping time of the gear blank. At the same time, when processing gears of the same specification, the tooth surface processing of all gear blanks can be completed uniformly, and then the gear fillet can be processed uniformly, which reduces the tool replacement time and improves the processing efficiency.

[0027] 2. By setting a connecting channel between the type 1 mounting hole and the type 2 mounting hole, and driving the hydraulic oil through the structure of the piston and the adjusting bolt to provide liquid pressure for the slide rod, when clamping the gear blank, the liquid pressure on each slide rod is the same, that is, the clamping force exerted by each slide rod on the gear blank is the same, which ensures the stability of the tooling clamping the gear blank and the coaxiality of the gear blank and the chuck.

[0028] 3. By setting a sealing chamfer on the mounting seat and a sealing bevel on the base, the sealing between the mounting seat and the base is ensured through the inclined surface cooperation between the sealing bevel and the closed chamfer, and the leakage of the hydraulic oil in the type I mounting hole, the connecting channel and the type II mounting hole is avoided, the stability of the hydraulic pressure is ensured, and thus the clamping stability of the tooling is ensured; at the same time, the flatness and surface roughness requirements of the lower end of the mounting seat and the upper end surface of the base are reduced, thereby reducing the processing cost of the mounting seat and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a gear fillet milling tool of the present invention;

[0030] Figure 2 for Figure 1 Full section view at AA in the middle;

[0031] Figure 3 for Figure 1 Full section view at the middle BB;

[0032] Figure 4 It is a schematic diagram of the overall structure of another embodiment of a gear fillet milling tool of the present invention;

[0033] Figure 5 for Figure 4 Full section view at the middle CC;

[0034] Figure 6 It is a structural schematic diagram of a base in a gear fillet milling tool of the present invention;

[0035] Figure 7It is a structural schematic diagram of a mounting seat in a gear fillet milling tool of the present invention;

[0036] Figure 8 The present invention is a schematic structural diagram of a chuck in a gear fillet milling tool.

[0037] In the figure: 1. mounting seat; 101. type 1 mounting hole; 102. adjusting threaded hole; 103. type 2 mounting hole; 104. through hole; 105. connecting channel; 106. mounting groove; 107. sealing chamfer; 108. positioning boss; 2. base; 201. circular protrusion; 202. annular protrusion; 203. connecting protrusion; 204. sealing bevel; 205. through hole; 3. chuck; 301. type 3 mounting hole; 302. annular groove; 303. positioning chamfer; 4. slide rod; 5. block; 501. connecting part; 502. protrusion; 6. piston; 7. adjusting bolt; 8. type 1 bevel gear; 801. shaft neck; 9. type 2 bevel gear; 901. keyway hole; 10. protective ring. DETAILED DESCRIPTION

[0038] It should be noted that the front, back, left, right, up and down described in the following content correspond to -Y, +Y, +X, -X, +Z and -X in the drawings respectively, the R direction is clockwise rotation, and the L direction is counterclockwise rotation.

[0039] See also Figures 1 to 3 , Figures 6 to 8 As a specific implementation of a gear fillet milling tool provided by the present invention, the technical solution is as follows:

[0040] A gear fillet milling tool, comprising a mounting seat 1 and a base 2, both of which are in the shape of a disc. The mounting seat 1 and the base 2 are connected by bolts, and the mounting seat 1 is located on the upper side of the base 2. Six through holes 104 and six second-type mounting holes 103 are respectively provided in an annular array on the upper end face and the lower end of the mounting seat 1. The through holes 104 are coaxial with the second-type mounting holes 103. The second-type mounting holes 103 are countersunk holes, and the through holes 104 are connected with the second-type mounting holes 103. Six positioning bosses 108 are provided on the upper end face of the mounting seat 1, and the six positioning bosses 108 are respectively connected to the second-type mounting holes 103. The plurality of through holes 104 are coaxial, and the upper surface of the positioning boss 108 is hardened to 48-53HRC; the base 2 is provided with 6 through holes 205, and the six through holes 205 are through holes, and the through holes 205 are coaxial with the through holes 104. The six second-type mounting holes 103 are coaxially provided with chucks 3, and the chucks 3 are annular, and the inner diameter of the through hole 104 is φ160, the inner diameter of the second-type mounting hole 103 is φ290H8, the inner diameter of the through hole 205 is φ180, the inner diameter of the chuck 3 is φ170, and the outer diameter of the chuck 3 is φ28 0h6, the side wall of the chuck 3 is provided with four three-type mounting holes 301, the four three-type mounting holes 301 completely penetrate the side wall of the chuck 3, and the axis of the three-type mounting hole 301 is perpendicular to the axis of the chuck 3, and a slide rod 4 is slidably installed in the three-type mounting hole 301, and one end of the slide rod 4 extends into the inner hole of the chuck 3; a hydraulic assembly is arranged in the mounting seat 1, and the hydraulic assembly includes a piston 6 and an adjusting bolt 7, and the upper end surface and the lower end surface of the mounting seat 1 are respectively provided with an adjusting threaded hole 102 and a type I mounting hole 101, and the adjusting threaded hole 102 and a type I mounting hole 101 are respectively provided. The type-one mounting hole 101 is coaxial with the mounting seat 1, the type-one mounting hole 101 is a countersunk hole, and the adjusting threaded hole 102 is connected with the piston 6 hole, the piston 6 is coaxially slidably connected in the type-one mounting hole 101, the adjusting bolt 7 is threadedly connected with the adjusting threaded hole 102, and the lower end of the adjusting bolt 7 is fixedly connected with the piston 6, and a plurality of connecting channels 105 are provided on the lower end surface of the mounting seat 1, and the plurality of connecting channels 105 are all connected with the type-one mounting hole 101 and the type-two mounting hole 103, the height of the connecting channel 105 is 5 mm, and the thickness of the piston 6 is 10 mm.

[0041] For further information, see Figure 6 and Figure 7The base 2 is provided with a circular protrusion 201, a plurality of annular protrusions 202 and a plurality of connecting protrusions 203. The heights of the circular protrusions 201, the annular protrusions 202 and the connecting protrusions 203 are all 2.0 mm. The circular protrusion 201 is coaxially arranged with the base 2. The number of the plurality of annular protrusions 202 and the plurality of connecting protrusions 203 is the same as that of the second-type mounting hole 103. The annular protrusion 202 is annular. The inner diameter of the annular protrusion 202 is φ280H7. The outer diameter of the annular protrusion 202 is φ290h6mm. The outer wall of the circular protrusion 201 and the inner wall of the first-type mounting hole 101, the outer wall of the connecting protrusion 203 and the inner wall of the connecting channel 105 have a matching tolerance of H7 / h6. The bottom of the first-type mounting hole 101, the connecting channel 105 and the second-type mounting hole 103 is Sealing chamfers 107 are provided on the edges, a positioning chamfer 303 is provided on the bottom edge of the outer wall of the chuck 3, and sealing bevels 204 are provided on the bottom edges of the circular protrusion 201, the connecting protrusion 203 and the annular protrusion 202, wherein the sealing chamfer 107 and the positioning chamfer 303 are both C1.0, and the sealing bevel 204 is C1.5; a mounting groove 106 is provided on the mounting seat 1, and the inner side wall of the mounting groove 106 is equidistant from the inner wall of the type-one mounting hole 101, the side wall of the connecting channel 105, and the inner wall of the type-two mounting hole 103, annular grooves 302 are provided on the upper and lower end faces of the chuck 3, the annular groove 302 is coaxial with the chuck 3, and rubber sealing rings are provided in the annular groove 302 and the mounting groove 106, and the rubber sealing rings protrude 0.5mm outside the mounting groove 106 and the annular groove 302.

[0042] For further information, see Figure 8 A protective ring 10 is coaxially arranged on the inner side wall of the chuck 3. The protective ring 10 has the same height as the chuck 3. Four through holes are opened on the side wall of the protective ring 10. The four through holes are coaxial with the four slide bars 4 respectively. The through holes and the slide bars 4 are interference fit, and the protective ring 10 is made of elastic material. A block 5 is arranged at one end of the slide bar 4 extending into the inner hole of the chuck 3. The maximum outer size of the block 5 is 16*16*40mm. The block 5 includes a connecting portion 501 and a protruding portion 502. The connecting portion 501 is bolted to the slider. The protruding portion 502 extends to the upper side of the chuck 3. The side of the protruding portion 502 close to the inner hole of the chuck 3 is arc-shaped, and the axis of the protruding portion 502 is perpendicular to the axis of the slide bar 4. The side of the block 5 away from the slide bar 4 and the arc-shaped side wall on the connecting portion 501 are both provided with knurling, and the knurling is mesh or twill.

[0043] The gear blank clamped by this specific embodiment is a type I bevel gear 8, and the shaft diameter size range of the type I bevel gear is 20 to 130 mm. When using this tooling, the adjusting bolt 7 is rotated along the L direction, and the piston 6 rotates with the adjusting bolt 7 and gradually moves upward. The distance between the lower end surface of the piston 6 and the upper end surface of the circular protrusion 201 gradually increases, and the hydraulic oil in the type II mounting hole 103 flows into the type I mounting hole 101 through the connecting channel 105. The slide rod 4 is gradually moved toward the outside of the chuck 3 along the axial direction, and the distance between the blocks 5 in the same chuck 3 gradually increases until the minimum distance between the symmetrical blocks 5 in the same chuck 3 is greater than the size of the shaft diameter. The shaft diameter of the type I bevel gear 8 is inserted into the through hole 104 until the bottom surface of the large end of the type I bevel gear 8 fits with the upper end surface of the positioning boss 108, thereby completing the height limit of the type I bevel gear 8, and the adjusting bolt 7 is rotated along the R direction, and the piston 6 rotates with the adjusting bolt 7 and gradually moves downward. The distance between the lower end surface of the piston 6 and the upper end surface of the circular protrusion 201 gradually increases, the hydraulic oil in the type-one mounting hole 101 flows into the type-two mounting hole 103 through the connecting channel 105, the slide bar 4 gradually moves toward the inner hole of the chuck 3 along the axial direction, and the distance between the blocks 5 in the same chuck 3 gradually decreases until the side wall of the block 5 away from the slide bar 4 fits with the outer side wall of the journal 801, and the adjusting bolt 7 is continuously rotated in the R direction for half a circle to one circle, thereby completing the locking between the type-one bevel gear 8 and the tooling; if there is one or more chucks 3 in which a type-one bevel gear 8 is not provided, the adjusting bolt 7 is rotated in the R direction until the side wall of the block 5 away from the slide bar 4 fits with the outer side wall of the journal 801, and the adjusting bolt 7 is continuously rotated in the R direction until the four blocks 5 in the chuck 3 in which the type-one bevel gear 8 is not provided abut against each other, and the adjusting bolt 7 is continuously rotated in the R direction for half a circle to one circle, thereby completing the locking between the type-one bevel gear 8 and the tooling.

[0044] As another specific embodiment of the present invention, please refer to Figure 4 and Figure 5, which is different from the previous specific embodiment, the gear blank clamped by this specific embodiment is a type II bevel gear 9, the size of the journal 801 of the type II bevel gear 9 is 130-170 mm, and the size of the keyway hole 901 is 45-150 mm; when using this tooling, the adjusting bolt 7 is rotated along the R direction, the piston 6 rotates with the adjusting bolt 7 and gradually moves downward, the distance between the lower end surface of the piston 6 and the upper end surface of the circular protrusion 201 gradually decreases, the hydraulic oil in the type I mounting hole 101 flows into the type II mounting hole 103 through the connecting channel 105, and the slide rod 4 gradually moves toward the inner hole of the chuck 3 along the axial direction. The distance between the blocks 5 in the same chuck 3 is gradually reduced until the four blocks 5 in the same chuck 3 are in contact with each other or the maximum distance between the two symmetrical protrusions 502 is smaller than the diameter of the keyway hole 901. The shaft diameter of the type-one bevel gear 8 is inserted into the through hole 104, and the four protrusions 502 are fully inserted into the keyway hole 901 until the bottom surface of the large end of the type-one bevel gear 8 fits with the upper end surface of the positioning boss 108, thereby completing the height limit of the type-one bevel gear 8. The adjusting bolt 7 is rotated along the L direction, and the piston 6 rotates with the adjusting bolt 7 and gradually moves upward. The lower end surface of the piston 6 is in contact with the circular protrusion 2 01 gradually increases, the hydraulic oil in the second type mounting hole 103 flows into the first type mounting hole 101 through the connecting channel 105, the slide bar 4 is gradually moved to the outside of the chuck 3 along the axial direction, and the spacing between the blocks 5 in the same chuck 3 gradually increases until the side wall of the protrusion 502 fits with the inner wall of the keyway hole 901, and the adjusting bolt 7 is continuously rotated half a circle to one circle along the L direction, thereby completing the locking between the second type bevel gear 9 and the tooling; if there is one or more chucks 3 without a second type bevel gear 9, the adjusting bolt 7 is rotated along the L direction until the side wall of the protrusion 502 fits After fitting with the inner wall of the keyway hole 901, continue to rotate the adjusting bolt 7 along the L direction until the side wall of the protrusion 502 of the four clamping blocks 5 in the chuck 3 where the type-2 bevel gear 9 is not set abuts against the inner wall of the chuck 3, and then continue to rotate the adjusting bolt 7 along the L direction for half a circle to one circle, thereby completing the locking between the type-2 bevel gear 9 and the tooling; if the length of the shaft neck 801 of the type-2 bevel gear 9 is greater than the distance from the upper end face of the positioning boss 108 to the outer side wall of the slide rod 4, it is necessary to replace a larger tooling to clamp the outer side wall of the shaft neck 801 of the type-2 bevel gear 9 to ensure the clamping force of the tooling on the type-2 bevel gear 9.

[0045] The above two specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A gear fillet milling tool, characterized in that: The invention comprises a mounting seat (1) and a base (2) both of which are in the shape of a disk, wherein the mounting seat (1) is connected to the base (2) by bolts, and the mounting seat (1) is located on the upper side of the base (2), and the upper and lower end surfaces of the mounting seat (1) are respectively provided with a plurality of through holes (104) and second-type mounting holes (103) in an annular array, wherein the number of the through holes (104) and the second-type mounting holes (103) are the same and coaxial, and the second-type mounting holes (103) are countersunk holes, and the through holes (104) are connected to the second-type mounting holes (103), and the base (2) is provided with a plurality of through holes (205), wherein the plurality of through holes (205) are through holes, and the number of the through holes (205) and the through holes (104) are the same and coaxial, and the plurality of second-type mounting holes (103) are coaxially provided with A chuck (3), wherein the chuck (3) is annular, the inner diameters of the through hole (104), the second-type mounting hole (103) and the through hole (205), and the inner and outer diameters of the chuck (3) are D1, D2, D3, D4 and D5 respectively, D1≤D4≤D3<D5<D2, the side wall of the chuck (3) is provided with at least three third-type mounting holes (301), a plurality of the third-type mounting holes (301) completely penetrate the side wall of the chuck (3), the third-type mounting holes (301) and the axis of the chuck (3) are perpendicular to each other, a slide rod (4) is slidably installed in the third-type mounting hole (301), one end of the slide rod (4) extends into the inner hole of the chuck (3), and a hydraulic component is arranged in the mounting seat (1), the hydraulic component is used to provide axial push and pull forces for the plurality of slide rods (4).

2. A gear fillet milling tool according to claim 1, characterized in that: The hydraulic assembly comprises a piston (6) and an adjusting bolt (7); an adjusting threaded hole (102) and a type-one mounting hole (101) are respectively provided on the upper end surface and the lower end surface of the mounting seat (1); the adjusting threaded hole (102), the type-one mounting hole (101) and the mounting seat (1) are coaxial; the type-one mounting hole (101) is a countersunk hole, and the adjusting threaded hole (102) is connected to a hole of the piston (6); the piston (6) is coaxially slidably connected to the type-one mounting hole (101); the adjusting bolt (7) is threadedly connected to the adjusting threaded hole (102), and the lower end of the adjusting bolt (7) is fixedly connected to the piston (6); a plurality of connecting channels (105) are provided on the lower end surface of the mounting seat (1); the plurality of connecting channels (105) are all connected to the type-one mounting hole (101) and the type-two mounting hole (103); and the height of the connecting channels (105) is less than the thickness of the piston (6).

3. A gear fillet milling tool according to claim 2, characterized in that: The base (2) is provided with a circular protrusion (201), a plurality of annular protrusions (202) and a plurality of connecting protrusions (203); the circular protrusion (201), the annular protrusion (202) and the connecting protrusion (203) have the same height, and the height range is 1 to 3 mm; the circular protrusion (201) is coaxially arranged with the base (2); the number of the plurality of annular protrusions (202) and the plurality of connecting protrusions (203) is the same as that of the second-type mounting hole (103); the annular protrusion (202) is annular, and the inner and outer diameters are D6 and D7 respectively, D5<D6<D7<D2; the outer wall of the circular protrusion (201) and the inner wall of the first-type mounting hole (101), the inner wall of the annular protrusion (202) and the outer wall of the chuck (3) are aligned with each other; The fitting tolerances between the outer wall of the annular protrusion (202) and the inner wall of the second-type mounting hole (103), and between the outer wall of the connecting protrusion (203) and the inner wall of the connecting channel (105) are all H7 / h6 or H8 / h7, the top and bottom of the first-type mounting hole (101), the connecting channel (105) and the second-type mounting hole (103) are all provided with sealing chamfers (107), the upper and lower sides of the outer wall of the chuck (3) are all provided with positioning chamfers (303), and the bottom edges of the circular protrusion (201), the connecting protrusion (203) and the annular protrusion (202) are all provided with sealing bevels (204), wherein C0.8≤sealing chamfer (107)=positioning chamfer (303)<sealing bevel (204)≤C1.

5.

4. A gear fillet milling tool according to claim 3, characterized in that: The mounting seat (1) is provided with a mounting groove (106), the inner side wall of the mounting groove (106) is equidistant from the inner wall of the type-one mounting hole (101), the side wall of the connecting channel (105), and the inner wall of the type-two mounting hole (103); the upper end surface and the lower end surface of the chuck (3) are both provided with an annular groove (302), the annular groove (302) is coaxial with the chuck (3), and rubber sealing rings are both provided in the annular groove (302) and the mounting groove (106), and the rubber sealing rings protrude from the mounting groove (106) and the annular groove (302) by at least 0.5 mm.

5. The gear fillet milling tool according to claim 2, characterized in that: A protective ring (10) is coaxially arranged on the inner side wall of the chuck (3). The protective ring (10) has the same height as the chuck (3). A plurality of through holes are opened on the side wall of the protective ring (10). The plurality of through holes are coaxial with a plurality of sliding rods (4) respectively. The through holes and the sliding rods (4) are in interference fit, and the protective ring (10) is made of elastic material.

6. The gear fillet milling tool according to claim 1, characterized in that: A clamping block (5) is provided at one end of the slide rod (4) extending into the inner hole of the chuck (3), and the clamping block (5) comprises a connecting portion (501) and a protruding portion (502), wherein the connecting portion (501) is bolted to the slide block, and the protruding portion (502) extends to the upper side of the chuck (3), and the side of the protruding portion (502) close to the inner hole of the chuck (3) is arc-shaped, and the axis of the protruding portion (502) is perpendicular to the axis of the slide rod (4).

7. The gear fillet milling tool according to claim 1, characterized in that: A plurality of positioning bosses (108) are provided on the upper end surface of the mounting seat (1), the plurality of positioning bosses (108) are respectively coaxial with the plurality of through holes (104), and the upper surface of the positioning bosses (108) is hardened to 48-53HRC.

8. The gear fillet milling tool according to claim 6, characterized in that: Knurling is provided on the side of the clamping block (5) away from the slide rod (4) and on the arc-shaped side wall of the connecting portion (501), and the knurling is in the form of a mesh pattern or a diagonal pattern.

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