Efficient gear hobbing machine

Abstract

The invention discloses an efficient gear hobbing machine, and belongs to the technical field of gear hobbing machines. The machine tool mainly comprises a machine tool body, a deburring assembly, a displacement driving assembly and a covering assembly. The deburring assembly comprises an annular sleeve box capable of sliding in the axial direction of the boss and a milling disc. The covering assembly comprises an arc-shaped protecting cover arranged on the clamp base and a driving top shaft. The driving displacement assembly is in linkage with the hob head stroke, the annular sleeve box is driven to move upwards, the arc-shaped protection cover is pushed by the driving jacking shaft loaded by the annular sleeve box to execute the opening action, the milling disc is exposed and tightly attached to the bottom face of the gear to be machined, and autorotation cutting is synchronously executed in the hob return stroke stage. Automatic avoiding, dynamic protection and online cleaning of the deburring mechanism are achieved through mechanical linkage logic, plastic casting burrs at the bottom of a gear are effectively removed, and the machining efficiency and the bottom surface cleanliness are improved while it is guaranteed that a precision assembly is free of chip interference.

Description

Technical Field

[0001] This invention relates to the field of gear hobbing machine technology, and in particular to a high-efficiency gear hobbing machine. Background Technology

[0002] Gear hobbing is one of the most commonly used cutting processes in gear manufacturing. Traditional CNC gear hobbing machines typically use the linkage rotation of the hob shaft and the workpiece shaft, combined with the longitudinal feed of the hob holder along the workpiece axis to achieve gear machining. In actual production, the industry mostly uses a downward feed climb milling method. In this type of machine tool, during the machining process, the hob holder starts from the top of the gear to be machined and gradually moves downward as the gear rotates until it cuts through the bottom edge of the gear.

[0003] However, in existing gear hobbing processes, when the hob holder feeds downwards to the bottom end face of the workpiece, the material loses its physical support from below the cutting edge the instant it exits. This causes the cutting force to change from localized shearing to extrusion, resulting in plastic flow of the material and leaving extrusion burrs on the bottom end face of the gear. Currently, these extrusion burrs are mostly removed manually or through offline secondary processing in industrial settings. Because the burrs are unevenly distributed and firmly connected at the root, manual operation is not only labor-intensive but also prone to causing scratches on the end face or exceeding the dimensional tolerances of the gear chamfer due to inconsistent scraping force, making it difficult to meet the product consistency requirements of highly flexible automated production lines.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a high-efficiency gear hobbing machine to solve the technical problems of plastic flow and extrusion burrs caused by material loss of support when climbing to the bottom exit in existing gear hobbing processes, and the low efficiency and poor processing consistency of traditional manual or offline deburring methods.

[0006] The present invention adopts the following technical solution: a high-efficiency gear hobbing machine. It includes a machine tool body, which is provided with a machine tool base. A worktable base is provided on the machine tool base, and a fixture base is vertically fixed on the worktable base. A boss is provided on the top of the fixture base, and a rotating turntable for supporting the workpiece is provided at the boss.

[0007] A deburring assembly includes an annular sleeve that can slide along the axial direction of the boss, and a milling disc disposed above the annular sleeve. The surface of the milling disc is provided with a plurality of scraping and holding elements for cutting burrs and a ramp for guiding chips outward.

[0008] The covering assembly includes an arc-shaped cover disposed at the fixture base and a drive top shaft that is linked to the annular sleeve.

[0009] A driving displacement assembly is arranged inside the clamp base and in transmission connection with the annular sleeve box;

[0010] The driving displacement assembly is configured to drive the annular sleeve box to displace upward, and the driving top shaft loaded by the annular sleeve box pushes the arc-shaped cover to perform an opening action to expose the milling disc to abut against the bottom surface of the gear to be machined and perform a rotating cleaning action, and the slope guides the stripped burrs to the chip removal path.

[0011] Further, the deburring assembly comprises an annular sleeve box, a bearing member and an inner ring gear; the annular sleeve box is vertically sleeved on the outer periphery of the boss, the boss surface is provided with a plurality of vertical embedding grooves, the inner wall of the annular sleeve box is fixedly provided with a pin block embedded in the embedding groove of the boss surface, and the inner ring gear is rotatably arranged on the inner wall of the annular sleeve box through the bearing member.

[0012] Further, the bottom surface of the pin block and the inner wall bottom surface of the embedding groove are connected with a reset spring, the reset spring is configured to release the pre-tightening energy and apply an axial downward pulling force to the pin block when the driving displacement assembly performs a downward avoiding or stopping jacking action, so as to drive the annular sleeve box to drive the pin block to slide downward along the vertical track of the embedding groove to reset, and the reset spring is passively stretched and cooperates with the side wall of the embedding groove to limit the circumferential rotation of the pin block to forcibly constrain the annular sleeve box to only make linear reciprocating lifting action along the axis direction of the boss during the upward sliding driven by the driving displacement assembly.

[0013] Further, the deburring assembly further comprises a support cover coaxially sleeved on the boss, the top surface of the inner ring gear is provided with a plurality of upwardly open movable grooves, the bottom of the support cover is fixedly provided with a plurality of vertically downward support rods, the end of each support rod is slidingly embedded in the corresponding movable groove to realize the synchronous rotation driving of the inner ring gear to the support cover; and the milling disc is fixedly arranged at the top outlet end of the support cover.

[0014] Further, the end of each support rod and the inner wall bottom end of the movable groove are connected with a buffer spring, the buffer spring is configured to elastically compensate the axial micro-motion of the support rod in the movable groove when the milling disc moves upward with the annular sleeve box and touches the bottom surface of the workpiece, so as to maintain the constant scraping pressure of the milling disc to the bottom surface of the gear to be machined and absorb the axial vibration in the cutting process.

[0015] Further, the driving displacement assembly comprises a base plate, two mounting seats, a rotating groove wheel and a servo power motor; the base plate is vertically fixed to the inner wall bottom of the clamp base, two mounting seats are symmetrically arranged on the base plate, the rotating groove wheel is rotationally arranged between the two mounting seats, the output end of the servo power motor is in transmission connection with the rotating groove wheel, a closed space curve groove is formed in the outer circumferential surface of the rotating groove wheel, and a follower pin is embedded in the space curve groove, and the follower pin is connected with a driven slider, so that the driven slider is driven to continuously rotate by the servo power motor, and then the driven slider is driven to perform reciprocating lifting movement in the vertical direction.

[0016] Further, the driving displacement assembly further comprises a servo power motor, a U-shaped linkage fork and a jacking transmission rod; two guide rods are symmetrically fixed between the two mounting seats, the driven slider is slidably arranged on the two guide rods to constrain deflection, the U-shaped linkage fork is horizontally arranged on the side surface of the driven slider and is rigidly connected with the bottom end of the jacking transmission rod, and the top end of the jacking transmission rod penetrates through the inner space of the clamp base and is in transmission connection with the bottom surface of the annular sleeve box.

[0017] Further, the driving displacement assembly further comprises a key groove rod coaxially fixedly connected with the rotating groove wheel and a driving gear meshing with the inner ring gear, the driving gear bearing is arranged on the inner wall bottom surface of the annular sleeve box, and a key groove matched with the key groove rod is arranged in the shaft hole of the driving gear bearing to form a sliding spline pair, during the axial displacement of the annular sleeve box driven by the jacking transmission rod, the driving gear performs synchronous rotation with the key groove rod and axial sliding along the key groove rod to maintain the meshing state with the inner ring gear during lifting.

[0018] Further, the covering assembly further comprises a plurality of right-angle frames fixed to the outer wall surface of the clamp base, and an arc-shaped cover is connected to each right-angle frame through a hinge, and a plurality of arc-shaped covers are connected to form a horn-shaped protective structure covering above the milling disc in the initial closed state.

[0019] Further, the driving top shaft comprises a plurality of mounting frames fixed to the outer circumferential edge of the annular sleeve box, and a vertical jacking rod fixed to the surface of each mounting frame, the vertical jacking rod rises synchronously with the annular sleeve box, and the end of the vertical jacking rod is configured to upwardly abut and push the arc-shaped cover to open upwardly around the hinge.

[0020] The above technical scheme adopted by the present application can achieve the following beneficial effects:

[0021] The application discloses a high-efficiency gear hobbing machine, which realizes online automatic cleaning in a return phase of gear hobbing processing by integrating a driving displacement assembly in a clamp base and connecting a deburring assembly in parallel with a boss outer periphery, driving the annular sleeve box upward by the driving displacement assembly, rotating cutting of the milling disc against the workpiece bottom surface to remove plastic flow deburring, and simultaneously performing the starting operation of the arc-shaped cover of the covering assembly by the driving top shaft loaded by the annular sleeve box, exposing the milling disc and discharging the waste chip by the slope of the milling disc surface, so that the technical problem that a traditional gear hobbing machine cannot simultaneously consider the protection and automatic cleaning of the precise deburring mechanism is solved, manual cleaning is replaced by mechanical linkage logic, the milling disc is prevented from being interfered by the flying chip, and the machining efficiency and the gear bottom surface cleanliness are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0023] In the drawings:

[0024] Figure 1 FIG. 1 is a schematic diagram of the whole high-efficiency gear hobbing machine;

[0025] Figure 2 FIG. 2 is a schematic diagram of a partial structure of the high-efficiency gear hobbing machine; Figure 1

[0026] Figure 3 FIG. 3 is a schematic diagram of a structure of the high-efficiency gear hobbing machine in a covering state of a covering assembly; Figure 2

[0027] Figure 4 FIG. 4 is a schematic diagram of a structure of the high-efficiency gear hobbing machine in an unfolded state of the covering assembly;

[0028] Figure 5 FIG. 5 is an enlarged schematic diagram of A of the high-efficiency gear hobbing machine; Figure 4

[0029] Figure 6 FIG. 6 is a schematic diagram of a partial structure of the high-efficiency gear hobbing machine; Figure 3

[0030] Figure 7 FIG. 7 is an enlarged schematic diagram of B of the high-efficiency gear hobbing machine; Figure 6

[0031] Figure 8 FIG. 8 is an enlarged schematic diagram of C of the high-efficiency gear hobbing machine; Figure 4 LIST OF REFERENCES:

[0032]

[0033] ​​​​​​1, machine tool main body; 12, machine tool base; 13, worktable base; 14, fixture base; 141, boss; 15, rotary turntable; 16, Z-axis guide rail support; 161, follow-up center; 17, hob carrier slide; 18, hob spindle; 19, hob drive motor; 110, hob carrier body; 2, operation door; 3, deburring assembly; 31, annular sleeve box; 32, bearing; 33, inner ring gear; 34, support cover; 341, support rod; 35, milling disc; 351, slope; 352, scraping piece; 311, pin block; 4, driving displacement assembly; 41, base plate; 411, mounting seat; 42, rotary groove wheel; 43, driven sliding block; 44, guide rod; 45, servo power motor; 46, U-shaped linkage fork; 47, jacking transmission rod; 48, key groove rod; 49, driving gear; 5, covering assembly; 51, right-angle frame; 52, torsional spring hinge; 53, mounting frame; 54, vertical jack; 56, arc-shaped cover. DETAILED DESCRIPTION

[0034] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application will be described in detail below in combination with the drawings and preferred embodiments.

[0035] The technical solutions provided by the embodiments of the present application will be described in detail below in combination with the drawings.

[0036] Referring to Figures 1-8 The present application provides a high-efficiency hobbing machine, which mainly comprises a machine tool main body 1 for providing a high-precision cutting processing space and stable support for the overall machine structure, a deburring assembly 3 for fitting the gear bottom surface and performing rotary cutting during the hob return phase to remove plastic flow deburring, a driving displacement assembly 4 for realizing the axial reciprocating lifting of the deburring mechanism and synchronously providing rotary power, and a covering assembly 5 for shielding the precision assembly during hobbing processing and being controlled to open to leave out the processing space during the deburring phase.

[0037] The machine tool main body 1 has a machine tool base 12, and the upper surface of the machine tool base 12 is horizontally provided with a worktable base 13 for bearing the entire processing load. A fixture base 14 is vertically fixed on the worktable base 13, and the fixture base 14 serves as the core support of the workpiece clamping system. A boss 141 is integrally arranged on the top of the fixture base 14, and a rotary turntable 15 is arranged at the center of the boss 141. The rotary turntable 15 is sequentially and downwardly arranged through the top fixture base 14 and the boss 141, and is in transmission connection with a driving part arranged in the fixture base 14. The rotary turntable 15 is used to support and drive the to-be-processed gear blank to perform the rotary movement required for cutting.

[0038] An operating door 2 is slidably arranged on the machine tool body 1, which is used to open or close the machining area and prevent the cooling liquid and chips from splashing during machining. A Z-axis guide rail support 16 is vertically arranged on one side of the inner wall of the machine tool body 1, which provides precise guide support for the longitudinal feed of the hob. A tailstock slide plate (not marked in the figure) is slidably arranged on the Z-axis guide rail support 16. A follow-up center 161 is arranged at the end of the cantilever of the tailstock slide plate, which is located directly above the rotary turntable 15 and is configured to be driven downward by hydraulic pressure before machining starts. The conical end of the follow-up center 161 is inserted into the center hole of the gear blank, so as to clamp the gear blank from the top, and cooperate with the rotary turntable 15 at the bottom to realize the bidirectional axial centering and clamping stability of the workpiece during high-speed rotary cutting.

[0039] And a hob holder slide 17 is slidably arranged on the lifting guide rail on the other side of the inner wall of the machine tool body 1. A hob holder body 110 is installed on the hob holder slide 17, and a hob spindle 18 is arranged in the hob holder body 110. A hob driving motor 19 is also arranged on the hob holder slide 17, which serves as the main cutting power source and drives the hob on the hob spindle 18 to rotate and cut.

[0040] In the actual machining cycle, the hob feeds downward along the Z-axis guide rail support 16 with the hob holder slide 17. When the hob cuts to the outlet position at the bottom end of the workpiece, the position feedback signal will synchronously trigger the driving displacement assembly 4 located inside the clamp base 14, so as to control the deburring assembly 3 and the covering assembly 5 below to perform corresponding linkage avoidance or scraping actions.

[0041] As shown in Figures 6-8 In order to fit the gear bottom surface and perform rotary cutting during the hob return stroke, the deburring assembly 3 includes an annular sleeve box 31 which is vertically slidably sleeved on the outer periphery of the boss 141. In order to realize axial guidance and limit circumferential rotation, a plurality of vertical embedding grooves are formed on the surface of the boss 141. A pin block 311 is fixedly arranged on the inner wall of the annular sleeve box 31 and embedded in the embedding groove. A return spring (not shown in the figure) is connected between the bottom surface of the pin block 311 and the inner wall bottom surface of the embedding groove.

[0042] When the driving displacement assembly 4 stops lifting or performs avoidance action, the return spring releases the pre-tightening energy and applies a downward pulling force to the pin block 311, driving the annular sleeve box 31 to slide downward along the vertical track of the embedding groove and reset. During upward sliding, the return spring is passively stretched and cooperates with the side wall of the embedding groove to limit the rotation of the pin block 311, thereby forcibly restricting the annular sleeve box 31 to make linear lifting action only along the axis direction of the boss 141.

[0043] Continuing to refer to Figures 6-8As shown, the inner ring gear 33 is rotatably arranged inside the annular sleeve box 31 through the bearing member 32, the deburring assembly 3 further comprises a support cover 34 coaxially sleeved on the boss 141, the top surface of the inner ring gear 33 is circumferentially provided with a plurality of upwardly open movable grooves, the bottom of the support cover 34 is fixedly provided with a plurality of vertically downward support rods 341, the end of each support rod 341 is slidingly embedded in the corresponding movable groove, so as to realize the synchronous rotation driving of the support cover 34 by the inner ring gear 33. The milling disc 35 is fixedly arranged at the top outlet end of the support cover 34, the surface of the milling disc 35 is provided with a plurality of scraping members 352 for cutting burrs and slopes 351 for outwardly guiding chips, in addition, the end of each support rod 341 and the bottom surface of the movable groove are connected with a buffer spring (not shown in the figure), when the milling disc 35 moves upward with the annular sleeve box 31 and touches the bottom surface of the workpiece, the support rod 341 performs axial displacement in the movable groove to produce elastic retreat compensation, maintain constant scraping pressure and absorb cutting vibration.

[0044] As shown in the figure, Figures 3-5 The driving displacement assembly 4 for driving the deburring mechanism to act is arranged inside the clamp base 14, the driving displacement assembly 4 comprises a base plate 41 fixed at the bottom position of the inner wall of the clamp base 14, two mounting seats 411 symmetrically arranged on the base plate 41, a rotating groove wheel 42 rotatably connected between the two mounting seats 411 and a servo power motor 45 for providing power.

[0045] The servo power motor 45 is fixed inside the bottom surface of the clamp base 14, and the output end thereof is in transmission connection with the rotating groove wheel 42, the outer periphery of the rotating groove wheel 42 is provided with a closed space curve groove, a follower pin is embedded in the space curve groove, and a driven sliding block 43 is fixed on the follower pin, and two vertically arranged guide rods 44 are fixed between the two mounting seats 411, the driven sliding block 43 is slidingly sleeved on the two guide rods 44, the rotating groove wheel 42 is driven to rotate by the servo power motor 45, and the driven sliding block 43 is driven to perform controlled reciprocating lifting movement along the guide rod 44 by the space curve groove track.

[0046] Further, the driving displacement assembly 4 further comprises a U-shaped linkage fork 46 and a jacking transmission rod 47. The U-shaped linkage fork 46 is fixed on the side surface of the driven sliding block 43, the bottom end of the jacking transmission rod 47 is rigidly connected with the U-shaped linkage fork 46, and the top end of the jacking transmission rod 47 penetrates through the inner space of the clamp base 14 upwardly and contacts the bottom surface of the annular sleeve box 31. In this way, through the linear reciprocating movement of the driven sliding block 43, the power is transmitted to the deburring assembly 3 through the jacking transmission rod 47, so as to realize the axial lifting of the annular sleeve box 31.

[0047] In order to realize the rotation power transmission, the driving displacement assembly 4 further comprises a key groove rod 48 coaxially fixedly connected with the rotary groove wheel 42, the key groove rod 48 penetrates upward through the inner space of the clamp base 14 and is fixed with a driving gear 49, the driving gear 49 is bearing arranged on the bottom surface of the inner wall of the annular sleeve box 31 and is engaged with the inner ring gear 33, wherein the shaft hole of the driving gear 49 and the key groove rod 48 form a sliding spline pair, in the actual action cycle, the servo power motor 45 first drives the driving gear 49 to perform a rotating action through the key groove rod 48, and then drives the inner ring gear 33 and the milling disc 35 to rotate.

[0048] In this rotation process, the annular sleeve box 31 is driven to perform axial lifting displacement by the lifting driving rod 47, and the driving gear 49 is axially limited in the annular sleeve box 31, so that the driving gear 49 synchronously rises with the annular sleeve box 31 and performs axial sliding along the axis direction of the key groove rod 48, and the sliding spline cooperation ensures that the deburring assembly 3 can always maintain stable power transmission coupling with the driving displacement assembly 4 in the complex lifting reciprocating motion process, so as to realize the continuous rotation cleaning of the milling disc 35.

[0049] As shown in Figures 3-4 and Figure 8 , the device further comprises a covering assembly 5 for protecting deburring, the covering assembly 5 comprises a plurality of right-angle frames 51 fixed on the outer wall surface of the clamp base 14, a plurality of arc-shaped protective covers 56 movably connected with one end of the right-angle frame 51 through a torsional spring hinged piece 52, and a driving top shaft arranged on the deburring assembly 3.

[0050] Specifically, the vertical section of each group of right-angle frames 51 extends outward to the peripheral side of the milling disc 35, and the plurality of arc-shaped protective covers 56 are downwardly hung under the action of the torsional spring hinged piece 52 in the initial closed state, and are mutually spliced to form a horn-shaped protective structure which is narrow at the top and wide at the bottom, which is wrapped above the milling disc 35, so as to guide the high-pressure cutting fluid and splashed iron chips generated in the gear hobbing process and prevent them from entering the interior of the deburring assembly 3.

[0051] Further, the driving top shaft comprises a plurality of groups of mounting frames 53 fixed on the peripheral side edge of the annular sleeve box 31, and a vertical top rod 54 fixed on the top surface of each mounting frame 53, the vertical top rod 54 synchronously axially displaces with the annular sleeve box 31, and the top end of the vertical top rod 54 is just located on the inner side stress surface of the lower edge of the arc-shaped protective cover 56.

[0052] When the drive displacement component 4 drives the annular sleeve 31 to perform an upward cleaning stroke, the vertical push rod 54 rises synchronously, and its end directly abuts and pushes the inner wall of the arc-shaped cover 56. As the arc-shaped cover 56 is axially constrained by the torsion spring hinge 52, it flips outward and upward around the hinge point under the action of the pushing force. As the arc-shaped cover 56 opens, the milling disc 35 is fully exposed and continues to rise until it is close to the bottom surface of the gear to be processed for cleaning. When the cleaning is completed and the annular sleeve 31 descends and resets, the vertical push rod 54 is withdrawn, and the arc-shaped cover 56 closes and resets again under the action of the torsion spring, forming a protective state again.

[0053] Working principle: Before the machining cycle begins, the operator places the gear blank on the rotary table 15. The follower center 161 moves downward along the Z-axis guide rail support 16 under hydraulic drive, pressing against the center hole at the top of the blank. Together with the rotary table 15 at the bottom, it completes the axial centering and stable clamping of the workpiece. At this time, the deburring assembly 3 is in the initial clearance position below, and the several arc-shaped protective covers 56 of the covering assembly 5 are closed under the preload of the torsion spring hinge 52, forming a trumpet-shaped protective shield to shield the milling disc 35. Subsequently, the hob drive motor 19 drives the hob to rotate at high speed, and the hob holder slide 17 drives the hob to feed downward along the Z-axis to perform hobbing. During this process, the trumpet-shaped protective structure effectively guides the high-pressure cutting fluid and splashed iron chips, ensuring that the precision deburring mechanism is not impacted by impurities and maintaining the initial cleanliness of the system.

[0054] After the hob is fed to the exit position at the bottom of the gear and completes tooth cutting, the displacement component 4 is activated by a limit switch on the Z-axis or a servo drive signal linked to the CNC system. The servo motor 45 starts and drives the rotating grooved wheel 42 to rotate. The spatial curve groove on its surface forces the driven slider 43 to slide upward along the guide rod 44. The driven slider 43 drives the lifting transmission rod 47 to rise vertically through the U-shaped linkage fork 46, thereby pushing the annular sleeve 31. During the rise of the annular sleeve 31, the vertical push rod 54 fixed on it moves upward synchronously and abuts against the inner force-bearing surface of the arc-shaped cover 56. As the pushing force is continuously applied, the arc-shaped cover 56 overcomes the torsion spring force and flips outward and upward around the hinge point, revealing the previously covered milling disc 35, which continues to rise until it is close to the bottom surface of the gear to be processed. This linkage logic ensures precise phase matching between the deburring action and the hob return stroke, achieving seamless connection.

[0055] As the annular sleeve 31 is lifted, the power of the rotating grooved wheel 42 is transmitted to the drive gear 49 through the coaxial keyway rod 48. Since the drive gear 49 is engaged with the keyway rod 48 through a sliding spline pair, it can stably receive torque and drive the inner ring gear 33 to rotate while sliding axially with the annular sleeve 31. The inner ring gear 33 drives the milling disc 35 to rotate at high speed via the support rod 341. The scraper 352 on the milling disc 35 performs cutting and cleaning on the plastic burrs at the bottom of the gear. At this time, the buffer spring at the bottom of the support rod 341 ensures that the milling disc 35 maintains a constant scraping pressure on the bottom surface of the workpiece through slight axial displacement compensation. After the cleaning cycle ends, the rotating grooved wheel 42 rotates to the reset stroke, the lifting transmission rod 47 moves downward, and the annular sleeve 31 quickly retracts to its original position under the tension of the reset spring. As the vertical push rod 54 is withdrawn, the arc-shaped cover 56 automatically closes under the action of the torsion spring, re-entering the protective state, completing a complete deburring cycle.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-efficiency gear hobbing machine, characterized in that, include The machine tool body (1) is provided with a machine tool base (12), a worktable base (13) is provided on the machine tool base (12), a fixture base (14) is vertically fixed on the worktable base (13), a boss (141) is provided on the top of the fixture base (14), and a rotating turntable (15) supporting the blank is provided at the boss (141). The deburring assembly (3) includes an annular sleeve (31) that can slide along the axial direction of the boss (141), and a milling disc (35) disposed above the annular sleeve (31). The surface of the milling disc (35) is provided with a plurality of scraper holders (352) for cutting burrs and a ramp (351) for guiding chips outward. The cover assembly (5) includes an arc-shaped cover (56) disposed at the clamp base (14) and a drive top shaft that is linked to the annular sleeve (31); A drive displacement assembly (4) is disposed inside the clamp base (14) and is connected in a transmission manner to the annular sleeve (31); The drive displacement component (4) is configured to drive the annular sleeve (31) to move upward, and the drive top shaft loaded by the annular sleeve (31) pushes the arc-shaped cover (56) to perform an opening action, so as to expose the milling disk (35) so that it is close to the bottom surface of the gear to be processed and performs a rotation cleaning action, and guides the stripped burrs to the chip removal path through the ramp (351).

2. The high-efficiency gear hobbing machine according to claim 1, characterized in that: The deburring assembly (3) includes an annular sleeve (31), a bearing (32), and an inner ring gear (33). The annular sleeve (31) is vertically slidably sleeved on the outer periphery of the boss (141). The surface of the boss (141) is provided with several vertically oriented embedding grooves. The inner wall of the annular sleeve (31) is fixedly provided with a pin (311) embedded in the embedding groove on the surface of the boss (141). The inner ring gear (33) is rotatably disposed on the inner wall of the annular sleeve (31) through the bearing (32).

3. The high-efficiency gear hobbing machine according to claim 2, characterized in that: A reset spring is connected between the bottom surface of the pin (311) and the bottom surface of the inner wall of the embedding groove. The reset spring is configured to release preload energy and apply an axial downward pulling force to the pin (311) when the drive displacement assembly (4) performs a descent avoidance or a stop lifting action. This drives the annular sleeve (31) to move the pin (311) downward along the vertical trajectory of the embedding groove to reset. During the upward sliding driven by the drive displacement assembly (4), the reset spring is passively stretched and cooperates with the side wall of the embedding groove to restrict the circumferential rotation of the pin (311) so as to forcibly constrain the annular sleeve (31) to only perform linear reciprocating lifting and lowering actions along the axial direction of the boss (141).

4. A high-efficiency gear hobbing machine according to claim 2, characterized in that: The deburring assembly (3) also includes a support cover (34) coaxially sleeved on the boss (141). The top surface of the inner ring gear (33) is provided with several upward-opening movable slots. The bottom of the support cover (34) is fixedly provided with several vertically downward support rods (341). The end of each support rod (341) is slidably embedded in the corresponding movable slot to realize the synchronous rotation drive of the inner ring gear (33) on the support cover (34). The milling disc (35) is fixedly set at the top outlet end of the support cover (34).

5. A high-efficiency gear hobbing machine according to claim 4, characterized in that: Each of the support rods (341) is connected to a buffer spring between its end and the bottom of the inner wall of the movable groove. The buffer spring is configured such that when the milling disc (35) moves upward with the annular sleeve (31) and touches the bottom surface of the workpiece, the axial micro-movement of the support rod (341) in the movable groove generates elastic relief compensation, so as to maintain a constant scraping pressure of the milling disc (35) on the bottom surface of the gear to be machined and absorb axial vibration during the cutting process.

6. A high-efficiency gear hobbing machine according to claim 2, characterized in that: The drive displacement assembly (4) includes a base plate (41), two mounting seats (411), a rotating grooved wheel (42), and a servo motor (45). The base plate (41) is vertically fixed to the bottom of the inner wall of the fixture base (14). The two mounting seats (411) are symmetrically arranged on the base plate (41). The rotating grooved wheel (42) is rotatably arranged between the two sets of mounting seats (411). The output end of the servo motor (45) is connected to the rotating grooved wheel (42) for transmission. The outer circumferential surface of the rotating grooved wheel (42) is provided with a closed spatial curve groove, and a follower pin is embedded in the spatial curve groove. The follower pin is connected to a driven slider (43) so that the rotating grooved wheel (42) can be continuously rotated by the servo motor (45), thereby driving the driven slider (43) to perform reciprocating lifting motion in the vertical direction.

7. A high-efficiency gear hobbing machine according to claim 6, characterized in that: The drive displacement assembly (4) also includes a servo motor (45), a U-shaped linkage fork (46), and a lifting transmission rod (47); two guide rods (44) are symmetrically fixed between the two sets of mounting seats (411), the driven slider (43) slides through the two guide rods (44) to constrain deflection, the U-shaped linkage fork (46) spans the side of the driven slider (43) and is rigidly connected to the bottom end of the lifting transmission rod (47), the top end of the lifting transmission rod (47) passes through the internal space of the clamp base (14) and contacts the bottom surface of the annular sleeve (31) for transmission.

8. A high-efficiency gear hobbing machine according to claim 7, characterized in that: The drive displacement assembly (4) further includes a keyway rod (48) coaxially fixedly connected to the rotating grooved wheel (42) and a drive gear (49) meshing with the inner ring gear (33). The drive gear (49) is bearing disposed on the bottom surface of the inner wall of the annular sleeve (31), and its shaft hole is provided with a keyway that cooperates with the keyway rod (48) to form a sliding spline pair. During the axial displacement of the annular sleeve (31) driven by the lifting transmission rod (47), the drive gear (49) rotates synchronously with the keyway rod (48) and slides axially along the keyway rod (48) to maintain the meshing state with the inner ring gear (33) during the lifting process.

9. A high-efficiency gear hobbing machine according to claim 1, characterized in that: The covering assembly (5) also includes several sets of right-angle brackets (51) fixed to the outer wall surface of the clamp base (14). Each right-angle bracket (51) is connected to an arc-shaped cover (56) by a hinge (52). Several arc-shaped covers (56) are spliced ​​together in the initial closed state to form a trumpet-shaped protective structure covering the milling disc (35).

10. A high-efficiency gear hobbing machine according to claim 9, characterized in that: The drive shaft includes a plurality of mounting brackets (53) fixed to the outer periphery of the annular sleeve (31), and a vertical push rod (54) fixed to the surface of each mounting bracket (53). The vertical push rod (54) rises synchronously with the annular sleeve (31), and its end is configured to press against and push the arc-shaped cover (56) upward around the hinge (52) to open upward.

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