A gear shaping tooling for high-precision thin-walled gear rings

Abstract

The present invention provides a gear shaping tooling for a high-precision thin-walled gear ring, which includes a body, an elastic chuck, a support disc, a connecting plate, a pull sleeve, a transition disc, a pull rod, a bushing, a limit disc, a pull shaft, a base, a centering sleeve and a spacer sleeve. The inner surface of the body has a taper that cooperates with the elastic chuck. The cooperation connection between the pull shaft and the elastic chuck is realized by using the pull rod. The oil cylinder connecting rod indirectly pulls the elastic chuck downward, and the elastic chuck contracts downward in cooperation with the taper to complete automatic locking and centering. The gear shaping tooling of the present invention can achieve automatic clamping and centering, reduce the deformation of parts, improve the product precision, and is applicable to batch and mass production.

Description

Technical Field

[0001] The present invention belongs to the technical field of shaping tool machinery manufacturing, and particularly relates to a shaping tool for a high-precision thin-walled gear ring. Background Art

[0002] High-precision thin-walled hard tooth surface gear rings are widely used in the fields of aerospace industry, transmission boxes of armored vehicles, automotive gearboxes, etc. They have the characteristics of small rigidity, complex structure, and large material removal rate, and are typical difficult-to-machine parts. Especially for such gear rings with high precision requirements, the tooth profile tolerance ≤ 0.016 and the tooth direction tolerance ≤ 0.011. It is very difficult to meet the tooth part precision requirements using the previous shaping tools, and the parts are prone to deformation. Therefore, reducing the deformation caused by clamping is of great significance for improving the machining quality of thin-walled gear rings. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] The present invention provides a shaping tool for a high-precision thin-walled gear ring to solve the technical problems of improving the tooth part precision of the internal teeth during shaping of the thin-walled gear ring and reducing the deformation amount generated during shaping clamping.

[0005] (II) Technical Solutions

[0006] To solve the above technical problems, the present invention provides a shaping tool for a high-precision thin-walled gear ring. The shaping tool includes a body, an elastic chuck, a support disk, a connecting plate, a pull sleeve, a transition disk, a pull rod, a bushing, a limit disk, a pull shaft, a base, a centering sleeve, and a spacer sleeve; wherein,

[0007] The body has a cylindrical structure, and a transition disk connection groove and a body connection notch are respectively machined at the lower end of the cylinder wall; after using a connecting piece to screw into the groove wall of the transition disk connection groove and then into the threaded hole on the outer peripheral boss of the transition disk, the transition disk is fixedly connected to the bottom of the body; by using the installation space provided by the body connection notch, another connecting piece is screwed into another threaded hole on the outer peripheral boss of the transition disk and then further screwed into the threaded hole on the side wall of the base, so as to fixedly connect the transition disk to the top of the base, realizing the connection of the body and the base on the upper and lower sides of the transition disk respectively;

[0008] Use a connecting piece to screw into the outer peripheral boss of the limit disk and the bottom platform part of the base, and fixedly connect the limit disk to the upper side of the bottom of the base and the central ring part of the limit disk is embedded in the bottom central hole of the base; use a connecting piece to screw into the outer peripheral boss of the centering sleeve and the bottom platform part of the base, and fixedly connect the centering sleeve to the lower side of the bottom of the base and the central ring part of the centering sleeve is embedded in the bottom central hole of the base; the central rings of the limit disk and the centering sleeve are coaxially arranged;

[0009] Insert a connecting piece through the smooth hole on the inner wall of the support disk and then screw it into the threaded hole on the inner circumference of the transition disk to tightly connect the top of the support disk and the transition disk;

[0010] The inner surface of the main body has a taper, which is used to cooperate with the elastic chuck; insert an inner connecting piece into the side wall of the main body and then further screw it into the notch on the side wall of the elastic chuck to fixedly connect the side wall of the main body and the side wall of the elastic chuck;

[0011] Screw a connecting piece into the bottom groove of the connecting plate and then further screw it into the bottom threaded hole of the elastic chuck to tightly connect the bottom of the connecting plate and the elastic chuck; the pull sleeve is nested with the connecting plate; screw a connecting piece into the outer peripheral boss of the bushing, pass through the spacer sleeve arranged on the transition disk from below and then screw it into the bottom threaded hole of the pull sleeve to fixedly connect the bushing, the transition disk and the pull sleeve;

[0012] The pull shaft passes through the limit disk, the base and the centering sleeve in sequence. Insert a connecting piece into the threaded hole on the side wall of the limit disk to prevent the pull shaft from moving axially; the pull rod passes through the inner hole of the bushing and then screws into the middle threaded hole of the pull shaft. Insert a connecting piece into the threaded hole on the upper plane of the bushing to prevent the pull rod from moving axially; use the pull rod to realize the mating connection between the pull shaft and the elastic chuck. When the oil cylinder connecting rod pulls the elastic chuck downward indirectly, the elastic chuck contracts downward with the cooperation of the taper to complete automatic locking and centering.

[0013] Further, the connecting piece is an inner hexagon socket head cap screw.

[0014] Further, the base is machined with side wall holes.

[0015] Further, the gear shaping tooling further includes a shoulder nut, a pressing plate, a support rod, a pressing rod and a dust cover; among them, screw the dust cover into the threaded hole on the outer peripheral platform at the upper end of the main body with a connecting piece to fixedly connect the dust cover and the top of the main body; one end of the pressing rod is connected to the dust cover, and the other end passes through the pressing plate and is tightly connected to the shoulder nut; the bottom of the support rod is screwed into the dust cover, and the upper plane of the support rod is in point contact with the bottom arc part of the pressing plate to pad up the pressing plate and play a supporting role.

[0016] Further, the gear shaping tooling further includes a calibration piece. The shape of the calibration piece is exactly the same as the size of the machined part and is installed in the elastic chuck for calibrating the tooling.

[0017] Further, with the bottom surface of the centering sleeve as the reference, the parallelism of the contact surface between the support disk and the end face of the part is 0.05.

[0018] Further, with the outer circle of the centering sleeve as the reference surface, the cylindricity of the contact surface between the elastic chuck and the outer circle of the part is n0.008.

[0019] (III) Beneficial effects

[0020] The present invention provides a gear shaping tooling for a high-precision thin-walled gear ring, which includes a body, an elastic chuck, a support disk, a connecting plate, a pull sleeve, a transition disk, a pull rod, a bushing, a limit disk, a pull shaft, a base, a centering sleeve and a spacer sleeve. The inner surface of the body has a taper that cooperates with the elastic chuck. The cooperation connection between the pull shaft and the elastic chuck is realized by using the pull rod. The oil cylinder connecting rod indirectly pulls the elastic chuck downward, and the elastic chuck contracts downward in cooperation with the taper to complete automatic locking and centering. The gear shaping tooling of the present invention can achieve automatic clamping and centering, reduce the deformation of parts, improve the product precision, and is suitable for batch and mass production. Brief Description of the Drawings

[0021] Figure 1 It is a structural diagram of the gear shaping tooling for a high-precision thin-walled gear ring according to an embodiment of the present invention.

[0022] In the figure: 1 - shoulder nut; 2 - pressing plate; 3 - support rod; 4 - pressing rod; 5 - dust cover; 6 - body; 7 - elastic chuck; 8 - support disk; 9 - connecting plate; 10 - pull sleeve; 11 - transition disk; 12 - pull rod; 13 - bushing; 14 - limit disk; 15 - pull shaft; 16 - calibration part; 17 - base; 18 - centering sleeve; 19 - spacer sleeve. Detailed Description of the Embodiment

[0023] To make the objectives, contents and advantages of the present invention clearer, the following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments.

[0024] This embodiment provides a gear shaping tooling for a high-precision thin-walled gear ring, and its structure is as Figure 1 shown, mainly including a shoulder nut 1, a pressing plate 2, a support rod 3, a pressing rod 4, a dust cover 5, a body 6, an elastic chuck 7, a support disk 8, a connecting plate 9, a pull sleeve 10, a transition disk 11, a pull rod 12, a bushing 13, a limit disk 14, a pull shaft 15, a calibration part 16, a base 17, a centering sleeve 18 and a spacer sleeve 19.

[0025] The body 6 has a cylindrical structure, and a transition disk connection groove and a body connection notch are respectively machined at the lower end of the barrel wall. After using an inner hexagon socket head screw to screw into the groove wall of the transition disk connection groove and then into the threaded hole on the outer peripheral boss of the transition disk 11, the transition disk 11 is fixedly connected to the bottom of the body 1; by using the installation space provided by the body connection notch, another inner hexagon socket head screw is screwed into another threaded hole on the outer peripheral boss of the transition disk 11 and then further screwed into the threaded hole on the side wall of the base 17, so as to fixedly connect the transition disk 11 to the top of the base 17, and finally realize the connection of the body 6 and the base 17 on the upper and lower sides of the transition disk 11 respectively.

[0026] Use hexagon socket head cap screws to screw into the outer peripheral boss of the limit disc 14 and the bottom platform part of the base 17, and fix and connect the limit disc 14 to the upper side of the bottom of the base 17, and the central ring part of the limit disc 14 is embedded in the bottom central hole of the base 17. Use hexagon socket head cap screws to screw into the outer peripheral boss of the centering sleeve 18 and the bottom platform part of the base 17, and fix and connect the centering sleeve 18 to the lower side of the bottom of the base 17, and the central ring part of the centering sleeve 18 is embedded in the bottom central hole of the base 17. The base 17 is machined with side wall holes. The central rings of the limit disc 14 and the centering sleeve 18 are coaxially arranged.

[0027] Use hexagon socket head cap screws to pass through the inner wall clearance hole of the support disc 8 and then screw into the threaded hole on the inner circumference of the transition disc 11, and tightly connect the top of the support disc 8 and the transition disc 11.

[0028] The inner surface of the body 6 has a certain taper, which is used to cooperate with the elastic chuck 7. Use hexagon socket head cap screws to screw into the side wall of the body 6 and then further screw into the notch on the side wall of the elastic chuck 7, and fix and connect the side wall of the body 6 and the side wall of the elastic chuck 7.

[0029] Use hexagon socket head cap screws to screw into the bottom groove of the connecting plate 9 and then further screw into the bottom threaded hole of the elastic chuck 7, and tightly connect the bottom of the connecting plate 9 and the elastic chuck 7. The pull sleeve 10 is nested with the connecting plate 9. Use hexagon socket head cap screws to screw into the outer peripheral boss of the bushing 13, and pass through the spacer sleeve 19 arranged on the transition disc 11 from below and then screw into the bottom threaded hole of the pull sleeve 10, and fix and connect the bushing 13, the transition disc 11 and the pull sleeve 10.

[0030] The pull shaft 15 passes through the limit disc 14, the base 17 and the centering sleeve 18 in sequence. Use hexagon socket head cap screws to screw into the side wall threaded hole of the limit disc 14 to prevent the pull shaft 15 from moving axially. The pull rod 12 passes through the inner hole of the bushing 13 and then screws into the middle threaded hole of the pull shaft 15. Use hexagon socket head cap screws to screw into the threaded hole on the upper plane of the bushing 13 to prevent the pull rod 12 from moving axially. The cooperation connection between the pull shaft 15 and the elastic chuck 7 is realized by using the pull rod 12. The oil cylinder connecting rod pulls the elastic chuck 7 indirectly downward, and the elastic chuck 7 contracts downward in cooperation with the taper to complete automatic locking and centering.

[0031] Use hexagon socket head cap screws to screw the dust cover 5 into the threaded hole of the upper end outer peripheral platform of the body 6 to fix and connect the dust cover 5 to the top of the body 6.

[0032] One end of the pressing rod 4 is connected to the dust cover 5, and the other end passes through the pressing plate 2 and is tightly connected to the shoulder nut 1. The bottom of the support rod 3 is screwed into the dust cover 5, and the upper plane of the support rod 3 is in point contact with the bottom arc part of the pressing plate 2, which is used to lift the pressing plate 2 to play a supporting role.

[0033] The shape of the calibration piece 16 is exactly the same as the size of the processed part, and it is installed in the elastic chuck 7 to calibrate the tooling.

[0034] To ensure the accuracy requirements, it is necessary to ensure that in the assembled tooling, with the bottom surface of the centering sleeve 18 as the reference, the parallelism of the contact surface between the support plate 8 and the end face of the part is 0.05; with the outer circle of the centering sleeve 18 as the reference surface, the cylindricity of the contact surface between the elastic chuck 7 and the outer circle of the part is n0.008.

[0035] When using the gear shaping tooling of the present invention, the parts are installed in the elastic chuck 7 and placed on the support plate 8, covered with the pressure plate 2, adjusted in height and fixed by the shoulder nut 1. The gear shaping machine cylinder pulls the pull shaft 15 downward, and the pull shaft 15 cooperates with the centering sleeve 18, the base 17 and the limit plate 14. The pull rod 12 moves downward with the pull shaft 15, driving the bushing 13, the transition plate 11, the spacer sleeve 19, the pull sleeve 10, the connecting plate 9, the main body 6 and the elastic chuck 7 to move downward, and the support plate 8 moves downward with the transition plate 11. The transition plate 11 connects the base 17 and the main body 6 to ensure that the pull rod 12 is concentric with the pull shaft 15. Since the main body 6 has a taper, the elastic chuck 7 is clamped and contracted, and can be automatically aligned. Then the gear shaping cutter inserts the gear downward, and the chips are discharged from the side wall hole of the base 17 through the bushing 13 from the support plate 8 with the cutting fluid. After the gear shaping is completed, the gear shaping machine cylinder moves upward, and the pull rod 12 moves upward with the pull shaft, driving the bushing 13, transition plate 11, spacer 19, pull sleeve 10, connecting plate 9, body 6 and elastic collet 7 to move upward, and the support plate 8 moves upward with the transition plate 11, and the elastic collet 7 is loosened. At the right time, the operator can unscrew the shoulder nut 1, remove the pressure plate 2, remove the parts, and complete the gear shaping process.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gear shaping tooling for a high-precision thin-walled gear ring, characterized in that, The gear shaping tooling includes a body, an elastic chuck, a support disk, a connecting plate, a pull sleeve, a transition disk, a pull rod, a bushing, a limit disk, a pull shaft, a base, a centering sleeve and a spacer sleeve; among which, The body has a cylindrical structure, and a transition disk connection groove and a body connection notch are respectively machined at the lower end of the cylinder wall; after using a connecting piece to screw into the groove wall of the transition disk connection groove and then into the threaded hole on the outer peripheral boss of the transition disk, the transition disk is fixedly connected to the bottom of the body; by using the installation space provided by the body connection notch, another connecting piece is screwed into another threaded hole on the outer peripheral boss of the transition disk and then further screwed into the threaded hole on the side wall of the base, so as to fixedly connect the transition disk to the top of the base, realizing the connection of the body and the base on the upper and lower sides of the transition disk respectively; Use a connecting piece to screw into the outer peripheral boss of the limit disk and the bottom platform part of the base, and fixedly connect the limit disk to the upper side of the bottom of the base and the central ring part of the limit disk is embedded in the bottom central hole of the base; use a connecting piece to screw into the outer peripheral boss of the centering sleeve and the bottom platform part of the base, and fixedly connect the centering sleeve to the lower side of the bottom of the base and the central ring part of the centering sleeve is embedded in the bottom central hole of the base; the central rings of the limit disk and the centering sleeve are coaxially arranged; Use a connecting piece to pass through the inner wall light hole of the support disk and then screw into the threaded hole on the inner circumference of the transition disk, and tightly connect the support disk to the top of the transition disk; The inner surface of the body has a taper, which is used to cooperate with the elastic chuck; use an inner connecting piece to screw into the side wall of the body and then further screw into the notch on the side wall of the elastic chuck, so as to fixedly connect the side wall of the body and the side wall of the elastic chuck; Use a connecting piece to screw into the bottom groove of the connecting plate and then further screw into the bottom threaded hole of the elastic chuck, and tightly connect the connecting plate to the bottom of the elastic chuck; the pull sleeve is nested with the connecting plate; use a connecting piece to screw into the outer peripheral boss of the bushing, and pass through the spacer sleeve arranged on the transition disk from below and then screw into the bottom threaded hole of the pull sleeve, so as to fixedly connect the bushing, the transition disk and the pull sleeve; The pull shaft passes through the limit disk, the base and the centering sleeve in sequence, and use a connecting piece to screw into from the side wall threaded hole of the limit disk to prevent the pull shaft from moving; the pull rod passes through the inner hole of the bushing and then screws into the middle threaded hole of the pull shaft, and use a connecting piece to screw into the threaded hole on the upper plane of the bushing to prevent the pull rod from moving; the cooperation connection between the pull shaft and the elastic chuck is realized by using the pull rod. When the oil cylinder connecting rod indirectly pulls the elastic chuck downward, the elastic chuck contracts downward in cooperation with the taper to complete automatic locking and centering; The connecting piece is an inner hexagon socket head cap screw; the base is machined with a side wall hole.

2. The gear shaping tooling according to claim 1, wherein The gear shaping tooling further includes a shoulder nut, a pressing plate, a support rod, a pressing rod and a dust cover; among which, use a connecting piece to screw the dust cover into the threaded hole on the upper end outer peripheral platform of the body to fixedly connect the dust cover to the top of the body; one end of the pressing rod is connected to the dust cover, and the other end passes through the pressing plate and is tightly connected to the shoulder nut; the bottom of the support rod is screwed into the dust cover, and the upper plane of the support rod is in point contact with the bottom arc part of the pressing plate, which is used to lift the pressing plate and play a supporting role.

3. The gear shaping tooling according to claim 1, wherein, The gear shaping tooling further includes a calibration piece, and the shape of the calibration piece is exactly the same as the size of the machined part. It is installed in the elastic chuck and is used to calibrate the tooling.

4. The gear shaper tooling according to claim 1, wherein, Based on the bottom surface of the centering sleeve, the parallelism of the contact surface between the support disc and the part end face is 0.

05.

5. The gear shaper tooling according to claim 1, wherein, Based on the outer circle of the centering sleeve as the reference surface, the cylindricity of the contact surface between the elastic chuck and the part outer circle is 0.008.

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