Expansion sleeve of gear shaper for machining two-shaft gear

Abstract

The utility model discloses an expansion sleeve of a gear shaper for processing a two-shaft gear. The expansion sleeve comprises an expansion sleeve body, a plurality of expansion grooves are formed in the expansion sleeve body, and the expansion grooves are formed in the same side of the expansion sleeve body; a first conical surface is arranged at one end in the expansion sleeve body, a second conical surface is arranged at the other end in the expansion sleeve body, when the expansion sleeve is used, the first conical surface is matched with a conical surface of a pull rod, and the second conical surface is matched with a conical surface of a gear shaping clamp body; a boss is integrally arranged on the outer side of the expansion sleeve body and arranged on the outer side of the second conical face. The expansion sleeve is simple in structure and reasonable in design, and the technical problems that the upper end and the lower end of a double-conical-surface expansion sleeve are inconsistent in expansion amount and the expansion sleeve is prone to deformation are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of expansion clamps and relates to an expansion sleeve for machining a two-axis gear shaping machine. Background Art

[0002] The expansion sleeve currently used in the gear shaping fixture is a double-tapered expansion sleeve. The height of the positioning surface of the inner hole of the second-axis gear is 6.75mm; the height of the expansion sleeve is 22mm; there is a height difference of 15.25mm between the two. Since the workpiece positioning hole is relatively short, when the workpiece clamping action is completed, the double-tapered expansion sleeve only expands the workpiece by 6.75mm at the upper end, while about 15.25mm of the lower half of the expansion sleeve is suspended in the air, resulting in different expansion amounts of the upper and lower halves of the expansion sleeve, that is, smaller at the top and larger at the bottom. Since the upper and lower expansion amounts of the gear expansion sleeve are different, and the clamping and loosening actions are repeated for a long time, the double-conical expansion sleeve will inevitably be deformed and take on an "eight" shape with a smaller upper part and a larger lower part. When tightening the workpiece, it will be found that the contact surface between the expansion sleeve and the workpiece is in line contact rather than surface contact. It is easy to loosen during processing, causing tooling or tooth breakage. At the same time, the double-conical expansion sleeve will also be damaged due to deformation. The current solution is to make a force ring and put it on the lower end of the expansion sleeve to constrain the outward expansion force of the lower end of the expansion sleeve, so that the expansion amount of the upper and lower ends of the expansion sleeve is consistent, and the workpiece is not easy to loosen after clamping, and the expansion sleeve is not easy to be damaged. However, the current solution is cumbersome to operate, and it is easy to forget to put the force ring after changing production, resulting in rework and low production efficiency. At the same time, the iron filings generated are not easy to clean. Utility Model Content

[0003] In response to the problems existing in the prior art, the utility model provides a method for processing a two-axis gear shaping machine expansion sleeve, thereby solving the technical problems in the prior art of inconsistent expansion amounts of the upper and lower ends of the double-cone expansion sleeve and easy deformation of the expansion sleeve.

[0004] The utility model is realized through the following technical solutions:

[0005] A sleeve expansion machine for machining a two-axis gear shaping machine, comprising a sleeve expansion body;

[0006] The expansion sleeve body is provided with a plurality of expansion grooves, and the plurality of expansion grooves are arranged on the same side of the expansion sleeve body;

[0007] One end of the expansion sleeve body is provided with a first conical surface, and the other end is provided with a second conical surface. When the expansion sleeve is used, the first conical surface is matched with the conical surface of the pull rod, and the second conical surface is matched with the conical surface of the gear shaping fixture body.

[0008] A boss is integrally provided on the outer side of the expansion sleeve body, and the boss is provided on the outer side of the second conical surface.

[0009] Preferably, the plurality of expansion grooves are evenly spaced along the circumference of the expansion sleeve body.

[0010] Preferably, several of the expansion grooves include a first groove body and a second groove body that are integrally provided, and the width of the second groove body along the circumferential direction of the expansion sleeve body is greater than the width of the first groove body along the circumferential direction of the expansion sleeve body.

[0011] Preferably, the cross-section of the second groove body along the circumferential direction of the expansion sleeve body is circular.

[0012] Preferably, the bottom of the boss is flush with the bottom of the expansion sleeve body.

[0013] Preferably, the bottom of the expansion groove is flush with the top of the boss.

[0014] Preferably, an empty knife groove is further provided on the outer side of the expansion sleeve body.

[0015] Preferably, the empty knife groove is arranged along the circumference of the expansion sleeve body.

[0016] Preferably, a chamfered surface is provided on one side of the boss close to the empty knife groove.

[0017] Preferably, the distance between the bottom of the expansion groove and the bottom of the expansion sleeve body is 5 mm.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The utility model discloses an expansion sleeve for processing a two-axis gear shaping machine, comprising an expansion sleeve body; a plurality of expansion grooves are provided on the expansion sleeve body, and the plurality of expansion grooves are arranged on the same side of the expansion sleeve body; the expansion sleeve is provided with a plurality of expansion grooves on the same side of the expansion sleeve body to form a single-sided groove body, and a first conical surface is provided at one end inside the expansion sleeve body, and a second conical surface is provided at the other end. When the expansion sleeve is used, the first conical surface is matched with the conical surface of the pull rod, and the second conical surface is matched with the conical surface of the shaping fixture body, so that when clamping, the clamping cylinder is connected to the pull rod and moves downward, so that the conical surface of the pull rod exerts a downward pulling force on the conical surface of the upper end of the expansion sleeve, so that the upper end of the expansion sleeve expands outward and is tightened against the inner hole of the workpiece, while the lower end of the expansion sleeve and the conical surface of the shaping fixture body are pressed against each other without an outward expansion force, and only play a positioning role. At this time, its clamping state is that the workpiece will be tightened very tightly without loosening, and the expansion sleeve is not easily damaged, thereby avoiding the occurrence of knife hitting and tooth breakage. At the same time, a boss is integrally provided on the outer side of the expansion sleeve body, and the boss is provided on the outer side of the second conical surface, which effectively enhances the structural strength of the bottom of the expansion sleeve and avoids cracking of the bottom of the expansion groove.

[0020] Furthermore, the plurality of expansion grooves are evenly spaced along the circumference of the expansion sleeve body, so that the outward expansion force can be evenly distributed on the expansion sleeve body.

[0021] Furthermore, several of the expansion grooves include a first groove body and a second groove body that are integrally arranged. The width of the second groove body along the circumference of the expansion sleeve body is greater than the width of the first groove body along the circumference of the expansion sleeve body, which is conducive to the expansion of the upper end of the expansion sleeve body and plays a positioning role.

[0022] Furthermore, the cross-section of the second groove body along the circumferential direction of the expansion sleeve body is circular, which can make it easier for the expansion groove to expand when the expansion sleeve and the pull rod are tightened and subjected to force.

[0023] Furthermore, the bottom of the boss is flush with the bottom of the expansion sleeve body, which effectively improves the structural strength of the bottom of the expansion sleeve body.

[0024] Furthermore, the bottom of the expansion groove is flush with the top of the boss, which avoids cracking of the bottom of the expansion groove during the expansion process, affecting the quality and life.

[0025] Furthermore, an empty tool groove is provided on the outer side of the expansion sleeve body. The provision of the empty tool groove facilitates the external grinding of the expansion sleeve after heat treatment during the manufacturing process.

[0026] Furthermore, the empty knife groove is arranged along the circumferential direction of the expansion sleeve body, which can reduce the wall thickness of the expansion sleeve and facilitate the tightening of the expansion sleeve.

[0027] Furthermore, a chamfered surface is provided on one side of the boss close to the empty knife groove, and the provision of the chamfered surface facilitates the removal of iron cuttings.

[0028] Furthermore, the distance between the bottom of the expansion groove and the bottom of the expansion sleeve body is 5 mm. The setting of this distance ensures that the expansion sleeve can ensure its positioning while ensuring its structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a front view of a sleeve expansion machine for machining a two-axis gear shaping machine in the utility model;

[0031] Figure 2 This is a side view of a sleeve expansion machine for machining a two-axis gear shaping machine in the present utility model;

[0032] Figure 3 It is a structural diagram of the pull rod;

[0033] Figure 4 It is a structural diagram of the fixture body;

[0034] Figure 5 It is an assembly cross-sectional view of the pull rod, the fixture body and the expansion sleeve of the utility model;

[0035] Figure 6 It is an assembly cross-sectional view of the pull rod, the fixture body, the workpiece and the expansion sleeve of the utility model;

[0036] Figure 7 Schematic diagram of the structure of the support seat, where (a) is a top view, (b) is a main view, and (c) is a cross-sectional view of the AA surface in (a).

[0037] Among them: 1. Pull rod, 2. Clamp body, 3. Support seat, 4. Clamp body conical surface, 5. Expansion sleeve body, 51. Expansion groove, 52. Boss, 53. First groove body, 54. Second groove body, 55. Empty tool groove, 56. Chamfered surface, 6. Workpiece, 7. First conical surface, 8. Second conical surface, 9. Pull rod conical surface. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the present invention is typically placed when in use. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] The present invention is described in further detail below with reference to the accompanying drawings:

[0045] like Figure 1 、 2 As shown, the utility model provides a two-axis gear shaping machine expansion sleeve, including an expansion sleeve body 5; a plurality of expansion grooves 51 are provided on the expansion sleeve body 5, and the plurality of expansion grooves 51 are arranged on the same side of the expansion sleeve body 5, that is, a single-sided expansion groove 51 is formed, and a first conical surface 7 is provided at one end of the expansion sleeve body 5, and a second conical surface 8 is provided at the other end. When the expansion sleeve is used, the first conical surface 7 is matched with the pull rod conical surface 9, and the second conical surface 8 is matched with the conical surface 4 of the gear shaping fixture body; a boss 52 is integrally provided on the outer side of the expansion sleeve body 5, and the boss 52 is arranged on the outer side of the second conical surface 8.

[0046] In a preferred embodiment, a plurality of expansion grooves 51 are evenly spaced along the circumference of the expansion sleeve body 5, so that the outward expansion force is evenly distributed on the expansion sleeve body 5. The number of the expansion grooves 51 is preferably twelve.

[0047] In another preferred embodiment, several of the expansion grooves 51 include an integrally formed first groove 53 and a second groove 54. The width of the second groove 54 along the circumference of the expansion sleeve body 5 is greater than the width of the first groove 53 along the circumference of the expansion sleeve body 5. Preferably, the cross-section of the second groove 54 along the circumference of the expansion sleeve body 5 is circular, which facilitates the expansion of the upper end of the expansion sleeve body 5 and serves as a positioning function.

[0048] To improve the structural strength of the bottom of the expansion sleeve body 5, the bottom of the boss 52 is flush with the bottom of the expansion sleeve body 5. At the same time, to prevent cracking at the bottom of the expansion groove 51 during expansion, which would affect quality and lifespan, the bottom of the expansion groove 51 is flush with the top of the boss 52. Specifically, the distance between the bottom of the expansion groove 51 and the bottom of the expansion sleeve body 5 is 5mm. In a specific embodiment, the expansion sleeve height is 22mm, the distance between the bottom of the expansion groove 51 and the bottom of the expansion sleeve body 5 is 5mm, the thickness of the boss 52 is also 5mm, and the bottom of the expansion sleeve body 5 is flush with the bottom of the boss 52.

[0049] In addition, in a preferred embodiment, an empty knife groove 55 is further provided on the outer side of the expansion sleeve body 5 , and the empty knife groove 55 is arranged along the circumference of the expansion sleeve body 5 .

[0050] Furthermore, in order to facilitate the removal of iron cuttings, a chamfered surface 56 is provided on one side of the boss 52 close to the empty knife groove 55 .

[0051] like Figures 2 to 7 As shown, in the process of using the expansion sleeve, first install the fixture body 2 on the workbench, connect the support seat 3 with the fixture body 2, use a table to align the radial runout of the fixture body conical surface 4, and the runout is required to be within 0.001mm, then connect the expansion sleeve 5 with the fixture body conical surface 4 and install it, insert the pull rod 1 into the inner hole of the expansion sleeve 5 and connect it to the machine tool tensioning cylinder, and finally install the workpiece 6. When the gear shaping fixture is clamped, the second conical surface 8 contacts the conical surface 4 of the gear shaping fixture body to play a positioning role, and the first conical surface 8 is in contact with ... Surface 7 is in contact with the tapered surface 9 of the pull rod, and the pull rod is connected to the clamping cylinder of the workbench. When clamping, the clamping cylinder moves downward together with the pull rod 1, so that the tapered surface 9 of the pull rod exerts a downward pulling force on the first tapered surface 7, causing the first tapered surface 7 to expand outward and tighten against the inner hole of the workpiece, while the second tapered surface 8 and the tapered surface 4 of the gear shaping fixture body are pressed against each other without an outward expansion force, and only play a positioning role. At this time, in the clamping state, the workpiece will be tightened very tightly without loosening, and the expansion sleeve will not be easily damaged, thus avoiding the occurrence of knife hitting and tooth breakage.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for machining a two-axis gear shaping machine sleeve, characterized in that: It includes an expansion sleeve body (5); The expansion sleeve body (5) is provided with a plurality of expansion grooves (51), and the plurality of expansion grooves (51) are arranged on the same side of the expansion sleeve body (5); A first conical surface (7) is provided at one end of the expansion sleeve body (5), and a second conical surface (8) is provided at the other end; when the expansion sleeve is used, the first conical surface (7) is arranged in cooperation with the pull rod conical surface (9), and the second conical surface (8) is arranged in cooperation with the gear inserting clamp body conical surface (4); A boss (52) is integrally provided on the outer side of the expansion sleeve body (5), and the boss (52) is arranged on the outer side of the second conical surface (8).

2. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: A plurality of the expansion grooves (51) are evenly spaced along the circumference of the expansion sleeve body (5).

3. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: The plurality of expansion grooves (51) each comprise a first groove body (53) and a second groove body (54) which are integrally arranged, and the width of the second groove body (54) along the circumference of the expansion sleeve body (5) is greater than the width of the first groove body (53) along the circumference of the expansion sleeve body (5).

4. The expansion sleeve for machining a two-axis gear shaping machine according to claim 3, characterized in that: The cross section of the second groove body (54) along the circumference of the expansion sleeve body (5) is circular.

5. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: The bottom of the boss (52) is arranged flush with the bottom of the expansion sleeve body (5).

6. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: The bottom of the expansion groove (51) is arranged flush with the top of the boss (52).

7. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: An empty knife groove (55) is also provided on the outer side of the expansion sleeve body (5).

8. The expansion sleeve for machining a two-axis gear shaping machine according to claim 7, characterized in that: The empty knife groove (55) is arranged along the circumference of the expansion sleeve body (5).

9. The expansion sleeve for machining a two-axis gear shaping machine according to claim 7, characterized in that: A chamfered surface (56) is provided on one side of the boss (52) close to the empty knife groove (55).

10. The expansion sleeve for machining a two-axis gear shaping machine according to claim 1, characterized in that: The distance between the bottom of the expansion groove (51) and the bottom of the expansion sleeve body (5) is 5 mm.

Images