Internal spline gear shaping fixture

Abstract

The utility model relates to a clamping device for gear manufacturing, and specifically to an internal spline gear-shaping fixture, which is used to solve the problem of positioning by using a tool to directly contact the internal spline, which not only requires high skills of the operator, but also takes a long time, is not suitable for mass production of internal spline precision forgings, and cannot ensure the precise alignment of the tooth shape when positioning the internal spline tooth shape through an elastic expansion sleeve. The internal spline gear-shaping fixture can accurately control the relative position between the gear-shaping fixture and the workpiece through a built-in tooth alignment gauge and a cylindrical pin, and then determine the relative position of the tool and the fixture through the return of the C axis of the machine tool, and then determine the relative position of the workpiece and the tool, and finally can realize the gear-shaping and de-gauging processing of internal spline precision forging parts with a cross-bar spacing within a certain range.

Description

Technical Field

[0001] The utility model relates to a clamping device for gear manufacturing, in particular to an internal spline tooth-aligning and gear-inserting clamp. Background Art

[0002] The existing internal spline precision forgings do not reach the final size specifications during the forging process, especially leaving a certain amount of margin in the tooth thickness direction. In order to remove these margins, hot gearing treatment is required before forging is completed. In this process, it is particularly important to ensure the relative position relationship between the workpiece and the slotting cutter to avoid the occurrence of misaligned teeth. The previous operation method mainly relied on the operator to observe with the naked eye and use the slotting cutter to directly contact the internal spline to position it. This not only requires high skills from the operator, but also takes a long time, and is not suitable for mass production of internal spline precision forgings.

[0003] Reference Figure 1 Chinese patent CN109530820A discloses a precision positioning internal gear inserting fixture, including a fixture body 1 and a support seat 16, the fixture body 1 is provided with a positioning plate 3 for positioning a workpiece 4, an elastic expansion sleeve 2 for fixing the workpiece 4 is arranged above the positioning plate 3, the inner wall of the elastic expansion sleeve 2 is an extrusion surface 13 of a conical structure, and its outer wall is a positioning surface 14 matching the shape of the inner wall of the workpiece 4, a pull rod 11 is arranged in the elastic expansion sleeve 2, one end of the pull rod 11 matches the shape of the extrusion surface 13; the top of the pull rod 11 is provided with an arc concave surface, and the arc concave surface is connected to the chip removal channel 5, so The bottom of the chip removal channel 5 is also provided with a chip removal hole 6, and the chip removal hole 6 is connected with the chip removal channel 5. The elastic expansion sleeve 2 is provided with a discharge hole 7, and the chip removal hole 6 is connected with the discharge hole 7; the support seat 16 is located between the positioning plate 3 and the clamp body 1, and the bottom of the elastic expansion sleeve 2 passes through the inner hole of the positioning plate 3 and is connected with the support seat 16; the support seat 16 is also provided with a limit bolt hole 9, and a limit bolt 10 is provided in the limit bolt hole 9, and the pull rod 11 is provided with a limit groove 15 corresponding to the limit bolt hole 9; an anti-fragmentation gasket 8 is provided between the step surface 12 of the pull rod 11 and the support seat 16. The gear-inserting fixture positions the internal spline tooth shape through the elastic expansion sleeve 2, which can well prevent positioning eccentricity and facilitate tool alignment. However, the gear-inserting fixture cannot ensure the precise alignment of the tooth shape. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of using a slotting cutter to directly contact an internal spline for positioning, which not only requires high skills of the operator, but also takes a long time and is not suitable for batch production of internal spline precision forgings, and cannot ensure the accurate alignment of the tooth shape when positioning the internal spline tooth shape through an elastic expansion sleeve, and to provide an internal spline tooth slotting fixture.

[0005] In order to solve the deficiencies of the above-mentioned prior art, the present invention provides the following technical solutions:

[0006] An internal spline gear-matching gear-shaping fixture, which has the special features of a gear-shaping component and a gear-matching component;

[0007] The gear shaping assembly comprises a gear shaping expansion sleeve, and the outer side wall of the upper part of the gear shaping expansion sleeve is adapted to the inner ring side wall of the workpiece to be processed;

[0008] The gear assembly includes a base, and two gear units and a plurality of cylindrical pins arranged on the base; the base is arranged on the top of the gear inserting sleeve and is fixed to the gear inserting sleeve by a plurality of cylindrical pins; two first through holes are symmetrically arranged on the side wall of the base along the radial direction of the workpiece to be processed, the inner ends of the two first through holes are coaxially connected through the second through hole, and the diameter of the first through hole is greater than the diameter of the second through hole;

[0009] Each of the tooth alignment units comprises a tooth alignment gauge, a spring and a lever; the outer end of the tooth alignment gauge is used to tighten the inner tooth profile of the workpiece to be processed, the inner end is located in the first through hole, and a spring support rod is provided at the end, the spring is sleeved on the spring support rod, and one end of the spring abuts against the inner end of the tooth alignment gauge, and the other end abuts against the bottom of the first through hole; the diameter of the second through hole is larger than the diameter of the spring support rod;

[0010] The lever passes through a first through slot provided on the base along the axial direction of the workpiece to be processed and then extends into a lever hole provided on the tooth gauge, wherein the first through slot is a strip-shaped hole extending along the radial direction of the workpiece to be processed;

[0011] A limiting hole communicating with the outside is arranged on the inner wall of each of the first through holes, and is used for arranging a limiting screw for limiting the tooth alignment gauge.

[0012] Furthermore, the gear-inserting assembly also includes a pull rod, a support assembly and a positioning screw. The pull rod, the gear-inserting expansion sleeve and the support assembly are coaxially arranged in sequence from the inside to the outside. A through hole is provided in the support assembly. The outer diameter of the lower end of the gear-inserting expansion sleeve is adapted to the inner diameter of the through hole. The central through hole of the gear-inserting expansion sleeve is used to set the pull rod; a positioning screw hole connected to the central through hole of the gear-inserting expansion sleeve is provided on the side wall of the gear-inserting expansion sleeve, and the positioning screw is fixed to the pull rod after passing through the positioning screw hole.

[0013] Furthermore, the support assembly includes a support seat and a connecting plate coaxially arranged from top to bottom, a step hole is formed at the bottom of the support seat and the top of the connecting plate, and the through hole is arranged in the connecting plate; the outer wall of the lower part of the spline expansion sleeve is provided with a radial convex ring, the outer diameter of the radial convex ring is adapted to the step hole, and the positioning screw hole is arranged on the side wall of the radial convex ring.

[0014] Furthermore, the outer end of the pair of tooth gauges is a cone, and the tip of the cone is provided with a ball for tightening the inner tooth profile of the workpiece to be processed.

[0015] Furthermore, the upper end of each cylindrical pin is located in a pin hole provided on the bottom surface of the base, and the lower end cooperates with an A-type keyway provided on the top of the spline expansion sleeve.

[0016] Furthermore, the base is fixed to the insert gear expansion sleeve by two cylindrical pins, and the two pin holes are respectively located at the lower parts of the two first through holes.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The utility model discloses an internal spline gear shaping fixture. The relative position between the gear shaping fixture and the workpiece can be accurately controlled by means of a built-in gear alignment gauge and a cylindrical pin. The relative position between the tool and the fixture is determined by returning the C-axis of the machine tool, and the relative position between the workpiece and the tool is further determined. Finally, the gear shaping and de-gauging processing of internal spline precision forging parts with a cross-bar pitch within a certain range can be achieved.

[0019] (2) The utility model is an internal spline gear-jointing clamp, which takes into account the needs of rapid clamping and positioning. Through standardized components and structures, the time for positioning by visual observation and manual operation is greatly reduced, thereby improving the efficiency of operation.

[0020] (3) The utility model is an internal spline gear-aligning and gear-shaping fixture. Since the design of the gear-aligning component simplifies the operation steps, the professional requirements for operators are reduced and the training time is shortened. The operation steps and potential repetitive work are reduced, thereby speeding up production and ensuring that each product has the same high quality standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram is a structural diagram of a gear-inserting fixture for inserting internal gears with precision positioning;

[0022] Figure 1 The reference numerals are explained as follows: 1-clamping body; 2-elastic expansion sleeve; 3-positioning plate; 4-workpiece; 5-chip removal channel; 6-chip removal hole; 7-discharge hole; 8-anti-breakage gasket; 9-limiting bolt hole; 10-limiting bolt; 11-pull rod; 12-step surface; 13-extrusion surface; 14-positioning surface; 15-limiting groove; 16-support seat.

[0023] Figure 2 This is a schematic diagram of the axonometric structure of the gear-slotting expansion sleeve in the first embodiment of the utility model;

[0024] Figure 3 It is a schematic cross-sectional structural diagram of the gear inserting expansion sleeve in the first embodiment of the utility model;

[0025] Figure 4 It is a front view of the tooth assembly in the first embodiment of the utility model;

[0026] Figure 5 yes Figure 4 AA section view;

[0027] Figure 6 It is a top view of the base in the first embodiment of the utility model;

[0028] Figure 7 yes Figure 6 BB section view;

[0029] Figure 8 It is a structural schematic diagram of the tooth gauge in the first embodiment of the utility model;

[0030] Fig. 9 The utility model is a structural schematic diagram of a second embodiment of an internal spline gear-shaping fixture.

[0031] The reference numerals are as follows: 01 - workpiece;

[0032] 1- gear expansion sleeve, 11- radial convex ring, 12- positioning screw hole, 13- A-type keyway;

[0033] 2-pull rod; 31-support seat, 32-connecting plate, 33-through hole; 4-base, 41-first through hole, 42-second through hole, 43-limiting hole, 44-first through groove, 45-pin hole; 5-tooth gauge, 51-spring support rod, 52-shift rod hole; 6-spring; 7-shift rod; 8-cylindrical pin; 9-limiting screw. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Embodiment 1

[0036] Reference Figures 2 to 8 , an internal spline gear-matching clamp, comprising a gear-matching assembly and a gear-matching assembly.

[0037] Reference Figure 2 , Figure 3 The gear shaping assembly comprises a gear shaping expansion sleeve 1, and the outer side wall of the upper part of the gear shaping expansion sleeve 1 is adapted to the inner ring side wall of the workpiece 01 to be processed. The gear shaping expansion sleeve 1 can be arranged on the working table of the machine tool through a supporting device.

[0038] Reference Figure 4 , Figure 5 The above-mentioned gear assembly includes a base 4, and two gear units and two cylindrical pins 8 arranged on the base 4. Each gear unit includes a gear gauge 5, a spring 6 and a lever 7.

[0039] The base 4 is arranged on the top of the gear inserting sleeve 1 and is fixed to the gear inserting sleeve 1 by two cylindrical pins 8. Specifically, two pin holes 45 are arranged at the bottom of the base 4, and two A-type key grooves 13 are arranged at the top of the gear inserting sleeve 1. The upper ends of the two cylindrical pins 8 are respectively located in the two pin holes 45 arranged on the bottom surface of the base 4, and the lower ends are respectively matched with the two A-type key grooves 13 arranged on the gear inserting sleeve 1. The base 4 is provided with a first through hole 41, a second through hole 42 and a first through hole 41 which are coaxial and connected in sequence along the radial direction of the workpiece 01 to be processed, such as Figure 7 shown.

[0040] Reference Figure 4 and Figure 8 The outer end of the tooth gauge 5 is a cone, and a ball is provided at the tip of the cone. The ball is used to tighten the inner tooth profile of the workpiece 01. The inner end is located in the first through hole 41, and a spring support rod 51 is provided at the end. The spring 6 is sleeved on the spring support rod 51. The diameter of the second through hole 42 is larger than the diameter of the spring support rod 51, so that the inner end of the tooth gauge 5 can compress the spring 6 and extend into the second through hole 42. The tooth gauge 5 is provided with a lever hole 52.

[0041] Reference Figure 6 The top of the base 4 is provided with a first through slot 44 connected to the first through hole 41. The lever 7 passes through the first through slot 44 provided on the base 4 along the axial direction of the workpiece 01 to be processed and then extends into the lever hole 52 provided on the tooth gauge 5. The first through slot 44 is a strip hole extending radially along the workpiece 01 to be processed. Moving the lever 7 in the first through slot 44 can compress or release the corresponding spring 6.

[0042] A limiting hole 43 communicating with the outside is provided on the inner wall of each of the first through holes 41 and is used to set a limiting screw 9 .

[0043] Embodiment 2

[0044] Reference Figures 2 to 9 , an internal spline gear-matching clamp, comprising a gear-matching assembly and a gear-matching assembly.

[0045] The above-mentioned gear inserting assembly comprises a pull rod 2, a gear inserting expansion sleeve 1, a support assembly, and a positioning screw which are coaxially arranged in sequence from the inside to the outside.

[0046] Reference Figure 2 , Figure 3 The outer wall of the upper part of the gear expansion sleeve 1 is adapted to the inner ring side wall of the workpiece 01 to be processed, and the outer wall of the lower part is provided with a radial convex ring 11. The central through hole of the gear expansion sleeve 1 is used to set the pull rod 2. The support assembly includes a support seat 31 and a connecting plate 32 coaxially arranged from top to bottom, and the bottom of the support seat 31 and the top of the connecting plate 32 form a stepped hole. The connecting plate 32 is provided with a through hole 33, and the inner diameter of the through hole 33 is adapted to the outer diameter of the lower end of the gear expansion sleeve 1.

[0047] The radial protruding ring 11 is adapted to the stepped hole, and a positioning screw hole 12 connected to the central through hole of the gear expansion sleeve 1 is provided on the side wall of the radial protruding ring 11. The positioning screw passes through the positioning screw hole 12 and is fixed to the pull rod 2. The gear expansion sleeve 1 is fixed on the workbench of the machine tool through a supporting assembly.

[0048] The gear assembly comprises a base 4, and two gear units and two cylindrical pins 8 arranged on the base 4. Each gear unit comprises a gear gauge 5, a spring 6 and a lever 7.

[0049] Reference Fig. 9 The base 4 is arranged on the top of the gear inserting sleeve 1 and is fixed to the gear inserting sleeve 1 by two cylindrical pins 8. Specifically, two pin holes 45 are arranged at the bottom of the base 4, and two A-type key grooves 13 are arranged at the top of the gear inserting sleeve 1. The upper ends of the two cylindrical pins 8 are respectively located in the two pin holes 45 arranged on the bottom surface of the base 4, and the lower ends are respectively matched with the two A-type key grooves 13 arranged on the gear inserting sleeve 1. The base 4 is provided with a first through hole 41, a second through hole 42 and a first through hole 41 which are coaxial and connected in sequence along the radial direction of the workpiece 01 to be processed, such as Figure 7 shown.

[0050] Reference Fig. 9 , Figure 4 and Figure 8 The outer end of the tooth gauge 5 is a cone, and a ball is provided at the tip of the cone. The ball is used to tighten the inner tooth profile of the workpiece 01. The inner end is located in the first through hole 41, and a spring support rod 51 is provided at the end. The spring 6 is sleeved on the spring support rod 51. The diameter of the second through hole 42 is larger than the diameter of the spring support rod 51, so that the inner end of the tooth gauge 5 can compress the spring 6 and extend into the second through hole 42.

[0051] Reference Figure 6 The top of the base 4 is provided with a first through groove 44 communicating with the first through hole 41. Fig. 9 The lever 7 passes through the first through slot 44 provided on the base 4 along the axial direction of the workpiece 01 to be processed and then extends into the lever hole 52 provided on the tooth gauge 5. The first through slot 44 is a strip-shaped hole extending radially along the workpiece 01 to be processed.

[0052] A limiting hole 43 communicating with the outside is provided on the inner wall of each of the first through holes 41 and is used to set a limiting screw 9 .

[0053] The working principle of the second embodiment of the utility model is as follows:

[0054] Step 1, check whether the two first through holes 41 and the two pin holes 45 on the base 4 have surface defects such as burrs, and install two cylindrical pins 8 in the two pin holes 45 of the base 4 respectively;

[0055] Step 2, check the surface quality of the sphere at the outer end of the tooth gauge 5, install the spring 6 and the tooth gauge 5 into the corresponding first through hole 41, then install the lever 7 into the lever hole 52, and install the two limit screws 9 into the two limit holes 43 respectively, and make the ends of the two limit screws 9 keep a distance from the corresponding tooth gauge 5, ensure that each tooth gauge 5 can slide relative to the base 4 under the action of the spring 6, and fit tightly, and complete the installation of the tooth assembly;

[0056] Step 3, first place the workpiece 01 on the top of the support assembly, so that the outer wall of the upper part of the gear-shaping expansion sleeve 1 is radially limited to the inner wall of the workpiece 01 to be processed, and then install the gear assembly on the gear-shaping expansion sleeve 1. Specifically, push the levers 7 on both sides inward to make the outer end balls of the gear gauges 5 on both sides away from the inner tooth profile of the workpiece 01, and then extend the lower ends of the two cylindrical pins 8 into the two A-type keyways 13 on the gear-shaping expansion sleeve 1 to limit the rotation of the gear assembly relative to the gear-shaping expansion sleeve 1;

[0057] Step 4: If the workpiece 01 has an odd number of teeth, keep the end of one limit screw 9 away from the corresponding tooth alignment gauge 5, and tighten the end of the other limit screw 9 against the corresponding tooth alignment gauge 5, and then execute step 5; if the workpiece 01 has an even number of teeth, directly execute step 5;

[0058] Step 5, release the lever 7, the spring 6 pushes the gear gauge 5 to press against the inner tooth profile of the workpiece 01 to complete the gear alignment, and finally tighten the gear expansion sleeve 1 through the pull rod 2, remove the gear alignment assembly, and complete the clamping of the workpiece 01.

Claims

1. An internal spline gear shaping fixture, characterized in that: It includes a gear inserting assembly and a gear matching assembly; The gear shaping assembly comprises a gear shaping expansion sleeve (1), the outer side wall of the upper part of the gear shaping expansion sleeve (1) being adapted to the inner ring side wall of the workpiece (01) to be processed; The tooth alignment assembly comprises a base (4), and two tooth alignment units and a plurality of cylindrical pins (8) arranged on the base (4); the base (4) is arranged on the top of the tooth insertion expansion sleeve (1), and is fixed to the tooth insertion expansion sleeve (1) by means of the plurality of cylindrical pins (8); two first through holes (41) are symmetrically arranged on the side wall of the base (4) along the radial direction of the workpiece (01) to be processed, the inner ends of the two first through holes (41) are coaxially connected by means of a second through hole (42), and the diameter of the first through hole (41) is greater than the diameter of the second through hole (42); Each of the tooth alignment units comprises a tooth alignment gauge (5), a spring (6) and a lever (7); the outer end of the tooth alignment gauge (5) is used to press against the inner tooth profile of the workpiece (01) to be processed, the inner end is located in the first through hole (41), and a spring support rod (51) is provided at the end; the spring (6) is sleeved on the spring support rod (51), and one end of the spring (6) abuts against the inner end of the tooth alignment gauge (5), and the other end abuts against the bottom of the first through hole (41); the diameter of the second through hole (42) is larger than the diameter of the spring support rod (51); The shifting rod (7) passes through a first through slot (44) provided on the base (4) along the axial direction of the workpiece (01) to be processed and then extends into a shifting rod hole (52) provided on the tooth gauge (5), wherein the first through slot (44) is a strip-shaped hole extending radially along the workpiece (01) to be processed; A limiting hole (43) communicating with the outside is provided on the inner wall of each of the first through holes (41) and is used for setting a limiting screw (9) for limiting the position of the tooth gauge (5).

2. The internal spline gear shaping fixture according to claim 1, characterized in that: The gear inserting assembly also includes a pull rod (2), a support assembly and a positioning screw. The pull rod (2), the gear inserting expansion sleeve (1) and the support assembly are coaxially arranged in sequence from the inside to the outside. A through hole (33) is arranged in the support assembly. The outer diameter of the lower end of the gear inserting expansion sleeve (1) is adapted to the inner diameter of the through hole (33). The central through hole of the gear inserting expansion sleeve (1) is used to set the pull rod (2); a positioning screw hole (12) connected to the central through hole of the gear inserting expansion sleeve (1) is arranged on the side wall of the gear inserting expansion sleeve (1), and the positioning screw is fixed to the pull rod (2) after passing through the positioning screw hole (12).

3. The internal spline gear shaping fixture according to claim 2, characterized in that: The support assembly comprises a support seat (31) and a connecting plate (32) which are coaxially arranged in sequence from top to bottom, a step hole is formed at the bottom of the support seat (31) and the top of the connecting plate (32), and the through hole (33) is arranged in the connecting plate (32); the outer wall of the lower part of the spline expansion sleeve (1) is provided with a radial convex ring (11), the radial convex ring (11) is adapted to the step hole, and the positioning screw hole (12) is arranged on the side wall of the radial convex ring (11).

4. An internal spline gear shaping fixture according to any one of claims 1 to 3, characterized in that: The outer end of the tooth gauge (5) is a cone, and the tip of the cone is provided with a ball for pressing against the inner tooth profile of the workpiece (01) to be processed.

5. The internal spline gear shaping fixture according to claim 4, characterized in that: The upper end of each cylindrical pin (8) is located in a pin hole (45) provided on the bottom surface of the base (4), and the lower end cooperates with an A-shaped keyway (13) provided on the top of the gear expansion sleeve (1).

6. The internal spline gear shaping fixture according to claim 5, characterized in that: The base (4) is fixed to the insert gear expansion sleeve (1) via two cylindrical pins (8), and the two pin holes (45) are respectively located at the lower parts of the two first through holes (41).

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