Spiral bevel gear cutting combined tooling fixture

Abstract

A spiral bevel gear cutting assembly fixture includes a first connecting plate, a second connecting plate, a jig, and a tensioning mechanism. The jig is fixed to the end face of the first connecting plate. The second connecting plate is fitted and fixed to the left side of the jig, with the left end of the jig extending out of the second connecting plate. The tensioning mechanism includes a pull rod and a tensioning sleeve. The tensioning sleeve is installed on the left end of the pull rod and fitted onto the left end of the jig. The left end of the pull rod axially penetrates the first connecting plate and the jig. Moving the pull rod to the right along the axial direction of the jig causes the left end of the jig to compress the tensioning sleeve, thus clamping the workpiece within the tensioning sleeve. Moving the pull rod to the left along the axial direction of the jig prevents the left end of the jig from compressing the tensioning sleeve, thus disengaging the tensioning sleeve from the workpiece. In use, the axial tension generated by the pull rod is converted into a radial force, enabling the tensioning sleeve to tighten the inner hole of the workpiece, allowing the fixture to be self-centering while maintaining strong tensioning force. Only the tapered sleeve needs to be replaced with a set of fixtures, eliminating the need to replace the entire fixture, resulting in higher workpiece clamping accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, and in particular to a combination tooling fixture for cutting spiral bevel gears. Background Technology

[0002] Klingenberger spiral bevel gears require machining on a dedicated German Klingenberger C60U gear cutting machine. However, this type of machine has limited availability and a low market share. Currently available dedicated fixtures are outdated and have slow iteration speeds. Existing gear cutting fixtures use end-face clamping, which creates a gap between the inner hole and the fixture's positioning axis. Therefore, each workpiece clamping requires alignment, resulting in poor positioning accuracy, difficult and time-consuming installation, and excessive auxiliary operation time. Furthermore, frequent clamping causes wear on the machine tool spindle end face, reducing clamping accuracy and stability, and affecting workpiece machining accuracy and quality. Summary of the Invention

[0003] In order to solve the technical problems existing in the above-mentioned technology, it is necessary to provide a spiral bevel gear cutting combination tooling fixture.

[0004] A spiral bevel gear cutting assembly fixture includes a first connecting plate, a second connecting plate, a jig body, and a tensioning mechanism;

[0005] The tire body is fixed to the end face of the first connecting disc;

[0006] The second connecting plate is fixed to the left side of the tire body, and the left end of the tire body extends out of the second connecting plate;

[0007] The tensioning mechanism includes a pull rod and a tensioning sleeve. The tensioning sleeve is installed on the left end of the pull rod and fitted onto the left end of the tire body. The left end of the pull rod axially passes through the first connecting plate and the tire body. The pull rod moves to the right along the axial direction of the tire body, causing the left end of the tire body to compress the tensioning sleeve and deform, thereby achieving internal support and clamping of the workpiece within the tensioning sleeve. The pull rod moves to the left along the axial direction of the tire body, preventing the left end of the tire body from compressing the tensioning sleeve, thereby achieving separation of the tensioning sleeve from the workpiece.

[0008] Preferably, the right end of the tire body has a positioning protrusion that can extend into the interior of the first connecting disc, and the right end of the tire body has a truncated cone that is adapted to the tightening sleeve.

[0009] Preferably, the jig has a support platform on the right side of the truncated cone that is adapted to the inner hole of the workpiece and has a diameter larger than the maximum diameter of the truncated cone.

[0010] Preferably, a through hole is provided along the axial direction of the tire body for the pull rod to pass through.

[0011] Preferably, an anti-rotation component that restricts the rotation of the workpiece is installed on the left end face of the second connecting plate.

[0012] Preferably, a circular hole is formed along the axis of the second connecting plate, and the diameter of the circular hole is larger than the diameter of the support platform.

[0013] Preferably, the pull rod includes a first connecting rod and a second connecting rod; the first connecting rod is built into the tire body along the tire body axis, and both ends of the first connecting rod extend out of the tire body, the left end of the first connecting rod is fitted with a pressure cap for pressing the expansion sleeve, and the right end of the first connecting rod is connected to the end of the second connecting rod.

[0014] Preferably, the left end of the first connecting rod is detachably fitted with an "I"-shaped positioning head, and the pressure cover has an "I"-shaped hole through which the positioning head passes, and the left end face of the pressure cover has a receiving hole that accommodates the positioning head and communicates with the "I"-shaped hole.

[0015] Preferably, a retaining ring is fixedly provided on the first connecting rod to block the expansion sleeve, and the retaining ring and the pressure cap clamp the expansion sleeve between them.

[0016] Preferably, a guide groove is provided along the axial direction of the outer wall of the first connecting rod, and a stop pin extending into the guide groove is fixed along the radial direction of the positioning protrusion.

[0017] Compared with the prior art, the spiral bevel gear cutting combination tooling fixture provided by this utility model can install the first connecting plate on the machine tool spindle, and then assemble the second connecting plate, the jig, and the tensioning mechanism. The second connecting plate is used in conjunction with the workpiece. During use, it is only necessary to align the outer end face of the second connecting plate. There is no need to align the workpiece afterward. By moving the pull rod to the right along the axial direction of the jig, the left end of the jig is squeezed and deformed to achieve the internal support and clamping of the workpiece by the tensioning sleeve. When the pull rod moves to the left along the axial direction of the jig, the left end of the jig is no longer squeezed to the tensioning sleeve, so that the tensioning sleeve is disengaged from the workpiece. In use, this invention converts the axial tension generated by the pull rod into a radial force, clamping the workpiece by expanding the inner hole of the workpiece with the shrink sleeve. This allows the fixture to be self-centering while also providing strong shrinkage force. A single set of fixtures only requires replacing the tapered sleeve, satisfying both soft and hard cutting, eliminating the need for a complete fixture replacement. This results in higher workpiece clamping accuracy and efficiency. The first connecting plate is mounted on the machine tool spindle as a transition piece, providing versatility. Fixture replacement does not cause wear to the machine tool spindle, ensuring accurate workpiece positioning, clamping precision, and stability, thus guaranteeing the accuracy and quality of subsequent workpiece processing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the tire body of this utility model.

[0021] Figure 3 This utility model Figure 2 A cross-sectional structural diagram.

[0022] Figure 4 This is a schematic diagram of the structure of the first connecting plate of this utility model.

[0023] Figure 5 This utility model Figure 4 A structural diagram from another angle.

[0024] Figure 6 This is a schematic diagram of the structure of the second connecting disc of this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the tire body and tie rod connection of this utility model.

[0026] Figure 8 This is a schematic diagram of the structure of the pressure cap of this utility model.

[0027] Figure 9 This utility model Figure 8 A structural diagram from another angle.

[0028] Figure 10 This is a schematic diagram of the structure of the first connecting rod of this utility model.

[0029] In the figure: First connecting plate 01, end 11, T-slot 12, second connecting plate 02, anti-rotation component 21, round hole 22, body 03, positioning protrusion 31, truncated cone 32, support platform 33, through hole 34, tensioning mechanism 04, pull rod 41, first connecting rod 411, second connecting rod 412, positioning pressure head 413, retaining ring 414, guide groove 415, tensioning sleeve 42, pressure cap 05, I-shaped hole 51, receiving hole 52, stop pin 06, workpiece 07, machine tool spindle 08. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please refer to Figure 1 This utility model provides a spiral bevel gear cutting gear combination tooling fixture, including a first connecting plate 01, a second connecting plate 02, a tire body 03, and a tensioning mechanism 04;

[0033] The first connecting plate 01 is installed on the end face of the machine tool spindle by bolts during use. In order to ensure the accuracy and stability of the assembly between the first connecting plate 01 and the end face of the machine tool spindle, an end face key can be installed on the contact surface between the first connecting plate 01 and the machine tool spindle to fasten the two together.

[0034] The tire body 03 is fixed to the end face of the first connecting plate 01. For the installation and fixing of the tire body 03, bolts can be used to fix it to the left end face of the first connecting plate 01 to ensure easier disassembly and installation. Of course, other methods that can fix the tire body 03 to the first connecting plate 01 can also be used, such as welding, threaded connection, key connection, etc.

[0035] The second connecting plate 02 is fixed to the left side of the tire body 03, with the left end of the tire body 03 extending beyond the second connecting plate 02. For the installation and fixation of the second connecting plate 02, bolts can be used to fix it to the left end face of the tire body 03, ensuring easier disassembly and installation. The second connecting plate 02 is used in conjunction with the workpiece to provide end face positioning and anti-rotation for the workpiece. During use, only the outer end face of the second connecting plate 02 needs to be aligned; subsequent workpiece alignment is unnecessary.

[0036] The tensioning mechanism 04 includes a pull rod 41 and a tensioning sleeve 42. The tensioning sleeve 42 is installed on the left end of the pull rod 41 and fitted onto the left end of the body 03. The left end of the pull rod 41 axially passes through the first connecting plate 01 and the body 03, while the right end of the pull rod 41 is connected to the hydraulic cylinder at the tail end of the machine tool to provide axial tension. When the pull rod 41 moves to the right along the axial direction of the body 03, the left end of the body 03 compresses the tensioning sleeve 42, causing it to deform and thus clamping the workpiece within the tensioning sleeve 42. When the pull rod 41 moves to the left along the axial direction of the body 03, the left end of the body 03 no longer compresses the tensioning sleeve 42, thus disengaging the tensioning sleeve 42 from the workpiece. In use, the axial tension generated by the pull rod 41 is converted into radial force, which clamps the workpiece by expanding the inner hole of the expansion sleeve 42. This allows the tooling to be self-centering while also having a strong expansion force. With one set of tooling, only the tapered sleeve needs to be replaced, which can meet both soft and hard cutting needs. There is no need to replace the entire set of tooling. The workpiece clamping accuracy and efficiency are higher. The first connecting plate 01 is installed on the machine tool spindle as a transition part. It is versatile and will not cause wear to the machine tool spindle when the tooling is replaced. This ensures the accurate positioning, clamping accuracy and stability of the workpiece, and ensures the accuracy and quality of subsequent workpiece processing.

[0037] Please refer to Figure 2 , Figure 3 In one embodiment, the right end of the tire body 03 has a positioning protrusion 31 that can extend into the interior of the first connecting plate 01, and the positioning protrusion 31 is adapted to the inner hole of the first connecting plate 01; while the right end of the tire body 03 has a truncated cone 32 adapted to the expansion sleeve 42. The truncated cone 32 formed at the left end of the tire body 03 fits into the tapered hole inside the expansion sleeve 42. When the expansion sleeve 42 moves to the right under the action of the pull rod 41, the truncated cone 32 can form a radial compressive force on the expansion sleeve 42, causing the expansion sleeve 42 to deform, and thus the expansion sleeve 42 can be used to expand the inner hole of the workpiece to achieve the clamping of the workpiece; when the expansion sleeve 42 moves to the left under the action of the pull rod 41, the truncated cone 32 can disengage from the inner hole of the workpiece, and the expansion sleeve 42 can return to its original state.

[0038] Specifically, the body 03 has a support platform 33, which is located to the right of the truncated cone 32. The support platform 33 is adapted to the inner hole of the workpiece, and the diameter of the support platform 33 is greater than the maximum diameter of the truncated cone 32.

[0039] Please refer to Figures 4 to 6Correspondingly, a circular hole 22 is provided along the axis of the second connecting plate 02, and the diameter of the circular hole 22 is larger than the diameter of the support platform 33. When the workpiece is installed on the left end face of the second connecting plate 02, the influence of gravity will exert a downward force on the expansion sleeve 42 and the conical truncated cone 32, which will affect the durability of the expansion sleeve 42 and the accuracy of the workpiece after tightening. By fitting the inner hole of the workpiece onto the support platform 33, an effective radial support is formed on the workpiece, which can effectively solve the influence of gravity on the expansion sleeve 42 and make it safer and more reliable.

[0040] Secondly, in order to facilitate the axial reciprocating movement of the tie rod 41, a through hole 34 is provided along the axial direction of the tire body 03 for the tie rod 41 to pass through.

[0041] In one embodiment, to prevent the workpiece from rotating during cutting, an anti-rotation component 21 is installed on the left end face of the second connecting plate 02 to restrict workpiece rotation. The anti-rotation component 21 is fixed to the left end face of the second connecting plate 02 with screws, and a groove adapted to fit the anti-rotation component 21 can be pre-formed on the end face of the workpiece facing it. Of course, it is conceivable that the anti-rotation component 21 can be arranged symmetrically along the diameter direction of the second connecting plate 02. By cooperating with the support platform 33, the impact on the tightening sleeve 42 can be minimized, ensuring clamping accuracy.

[0042] Please refer to Figures 7 to 10 In one embodiment, the pull rod 41 includes a first connecting rod 411 and a second connecting rod 412. The first connecting rod 411 is embedded in the tire body 03 along the axis of the tire body 03, and both ends of the first connecting rod 411 extend out of the tire body 03. The left end of the first connecting rod 411 is fitted to press against the pressure cap 05 of the tightening sleeve 42, and the right end of the first connecting rod 411 is connected to the end of the second connecting rod 412. The first connecting rod 411 and the second connecting rod 412 can be connected by threads, which facilitates the assembly and disassembly of the pull rod 41.

[0043] Specifically, the left end of the first connecting rod 411 is detachably fitted with an "I"-shaped positioning head 413. The pressure cover 05 has an "I"-shaped hole 51 through which the positioning head 413 passes. The left end face of the pressure cover 05 has a receiving hole 52 that accommodates the positioning head 413 and communicates with the "I"-shaped hole 51. During installation, the positioning head 413 at the end of the first connecting rod 411 passes through the "I"-shaped hole 51 on the pressure cover 05 and is placed in the receiving hole 52. Then, the pressure cover 05 can be rotated to create a misalignment between the positioning head 413 and the "I"-shaped hole 51, so that when the first connecting rod 411 moves axially, the pressure cover 05 can compress the expansion sleeve 42.

[0044] Specifically, a retaining ring 414 is fixedly provided on the first connecting rod 411 to block the expansion sleeve 42. The retaining ring 414 and the pressure cover 05 clamp the expansion sleeve 42 between them.

[0045] In one embodiment, a guide groove 415 is provided along the axial direction of the outer wall of the first connecting rod 411. Correspondingly, a stop pin 06 extending into the guide groove 415 is fixed along the radial direction of the positioning protrusion 31. The stop pin 06 can restrict the rotation of the first connecting rod 411, and during the axial movement of the first connecting rod 411, the stop pin 06 can also provide guidance for the first connecting rod 411. For the stop pin 06, a mounting hole can be pre-drilled in the radial direction of the positioning protrusion 31. After the stop pin 06 is inserted into the mounting hole, the end of the stop pin 06 extends into the guide groove 415, and then the stop pin 06 is fixed by installing screws in the axial direction of the positioning protrusion 31.

[0046] In one embodiment, the right end face of the first connecting plate 01 has an end head 11 that can extend into the inner hole of the machine tool spindle, and the end head 11 will be adapted to the inner hole of the machine tool spindle; at the same time, the positioning protrusion 31 on the right end of the body 03 will also extend into the inner hole of the first connecting plate 01 during installation. In this way, the first connecting plate 01 and the body 03 can be ensured to be concentric and coaxial. Secondly, when the pull rod 41 is assembled, the pull rod 41 passes through the through hole 34 on the body 03, so that the pull rod 41 will also be concentric and coaxial with the first connecting plate 01 and the body 03, thus ensuring the installation accuracy.

[0047] Secondly, to meet the positioning dimensions of different tire bodies 03, T-slots 12 are evenly distributed along the radial direction of the first connecting disc 01. The number of T-slots 12 can be determined according to requirements; in this solution, four can be selected; of course, other numbers are also possible.

[0048] In one embodiment, a notch is provided along the axial direction of the outer wall of the expansion sleeve 42, and the notches are evenly distributed circumferentially along the outer wall of the expansion sleeve 42. When the expansion sleeve 42 is squeezed by the truncated cone 32, the notch on the expansion sleeve 42 will become larger, and at this time the outer contour of the expansion sleeve 42 will gradually become larger, so that the outer wall of the expansion sleeve 42 fits tightly with the inner hole of the workpiece.

[0049] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A spiral bevel gear generating assembly fixture, characterized by: Includes a first connecting disc, a second connecting disc, a tire body, and a tightening mechanism; The tire body is fixed to the end face of the first connecting disc; The second connecting plate is fixed to the left side of the tire body, and the left end of the tire body extends out of the second connecting plate; The tensioning mechanism includes a pull rod and a tensioning sleeve. The tensioning sleeve is installed on the left end of the pull rod and fitted onto the left end of the tire body. The left end of the pull rod axially passes through the first connecting plate and the tire body. The pull rod moves to the right along the axial direction of the tire body, causing the left end of the tire body to compress the tensioning sleeve and deform, thereby achieving internal support and clamping of the workpiece within the tensioning sleeve. The pull rod moves to the left along the axial direction of the tire body, preventing the left end of the tire body from compressing the tensioning sleeve, thereby achieving separation of the tensioning sleeve from the workpiece.

2. The spiral bevel gear generating fixture of claim 1, wherein: The right end of the tire body has a positioning protrusion that can extend into the first connecting plate, and the right end of the tire body has a truncated cone that is adapted to the tightening sleeve.

3. The spiral bevel gear generating fixture of claim 2, wherein: The body has a support platform on the right side of the truncated cone that is adapted to the inner hole of the workpiece and has a diameter larger than the maximum diameter of the truncated cone.

4. The spiral bevel gear generating fixture of claim 3, wherein: A through hole is provided along the axial direction of the tire body for the pull rod to pass through.

5. The spiral bevel gear generating fixture of claim 3 wherein: An anti-rotation component that restricts the rotation of the workpiece is installed on the left end face of the second connecting plate.

6. The spiral bevel gear generating fixture of claim 5, wherein: A circular hole is made along the axis of the second connecting plate, and the diameter of the circular hole is larger than the diameter of the support platform.

7. The spiral bevel gear tooth-cutting assembly fixture according to claim 2, wherein: The pull rod includes a first connecting rod and a second connecting rod; the first connecting rod is built into the tire body along the tire body axis, and both ends of the first connecting rod extend out of the tire body, the left end of the first connecting rod is fitted with a pressure cap for pressing the expansion sleeve, and the right end of the first connecting rod is connected to the end of the second connecting rod.

8. The spiral bevel gear generating fixture of claim 7, wherein: The left end of the first connecting rod is detachably fitted with an "I"-shaped positioning head. The pressure cover has an "I"-shaped hole through which the positioning head passes, and the left end face of the pressure cover has a receiving hole that accommodates the positioning head and communicates with the "I"-shaped hole.

9. The spiral bevel gear generating fixture of claim 8, wherein: The first connecting rod is fixedly provided with a retaining ring that blocks the expansion sleeve, and the retaining ring and the pressure cap clamp the expansion sleeve between them.

10. The spiral bevel gear generating fixture of claim 7, wherein: A guide groove is provided along the axial direction of the outer wall of the first connecting rod, and a stop pin extending into the guide groove is fixed along the radial direction of the positioning protrusion.

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