阅读说明：本技术 一种用于薄辐板齿轮零件磨齿加工的自定心防颤夹具及装夹方法 (Self-centering anti-vibration clamp for grinding and machining thin-web-plate gear part and clamping method ) 是由 罗平华 陶琪 黄光� 肖涛 瞿志军 陈龙 张力 张赞龙 于 2021-01-07 设计创作，主要内容包括：本发明公开了一种用于薄辐板齿轮零件磨齿加工的自定心防颤夹具,包括芯棒、锥套和螺母,芯棒自下而上依次包括球形柱、锥台、中心柱和外螺纹,螺母与外螺纹相配合,锥套套设于中心柱外；薄辐板齿轮零件包括通孔轴和薄壁辐板齿轮,通孔轴内孔下端与锥台配合；锥套位于通孔轴和螺母之间且锥套下端与通孔轴内孔上端配合,拧紧螺母将通孔轴固定在锥套和锥台之间；芯棒下、上端分别设有底部中心孔和顶部中心孔,底部中心孔用于与机床的底座顶尖相配合,顶部中心孔用于与机床上顶尖相配合。本发明能实现零件快速找正,在零件加工时有效防颤抗振。(The invention discloses a self-centering anti-vibration clamp for grinding teeth of a thin radial plate gear part, which comprises a core rod, a taper sleeve and a nut, wherein the core rod sequentially comprises a spherical column, a frustum, a central column and an external thread from bottom to top; the thin spoke plate gear part comprises a through hole shaft and a thin spoke plate gear, and the lower end of an inner hole of the through hole shaft is matched with the frustum; the taper sleeve is positioned between the through hole shaft and the nut, the lower end of the taper sleeve is matched with the upper end of the inner hole of the through hole shaft, and the nut is screwed up to fix the through hole shaft between the taper sleeve and the frustum; the lower end and the upper end of the core rod are respectively provided with a bottom center hole and a top center hole, the bottom center hole is used for being matched with a base top of a machine tool, and the top center hole is used for being matched with an upper top of the machine tool. The invention can realize the quick alignment of the parts and effectively prevent vibration and shock during the processing of the parts.)

1. The utility model provides a from centering anti-shake anchor clamps that is used for processing of thin radials gear part gerar grinding which characterized in that: the core rod comprises a core rod (1), a taper sleeve (4) and a nut (5), wherein the core rod (1) sequentially comprises a spherical column (11), a frustum (12), a central column (13) and an external thread (14) from bottom to top, the nut (5) is matched with the external thread (14), and the taper sleeve (4) is sleeved outside the central column (13);

the thin spoke plate gear part (7) comprises a through hole shaft (71) and a thin spoke plate (72), and the lower end of an inner hole of the through hole shaft (71) is matched with the frustum (12);

the taper sleeve (4) is positioned between the through hole shaft (71) and the nut (5), the lower end of the taper sleeve (4) is matched with the upper end of the inner hole of the through hole shaft (71), and the nut (5) is screwed down to fix the through hole shaft (71) between the taper sleeve (4) and the frustum (12);

the lower end and the upper end of the core rod (1) are respectively provided with a bottom center hole (111) and a top center hole, the bottom center hole (111) is used for being matched with a base top of a machine tool, and the top center hole is used for being matched with an upper top of the machine tool.

2. The self-centering anti-shudder clamp of claim 1, wherein: from centering anti-shake anchor clamps still include briquetting (2), briquetting (2) are equipped with briquetting centre bore (21) along axial direction, taper sleeve (4) and fixed with taper sleeve (4) are located to briquetting centre bore (21) cover, briquetting (2) contact and compress tightly the last tooth terminal surface of thin wall radials (72) with thin radials gear part's (7) thin wall radials (72).

3. The self-centering anti-shudder clamp of claim 2, wherein: the self-centering anti-vibration clamp further comprises a fastener (3), and the fastener (3) is used for fixing the taper sleeve (4) and the pressing block (2).

4. The self-centering anti-shudder clamp of claim 3, wherein: fastener mounting hole (42) have been seted up to taper sleeve (4) outer wall, briquetting centre bore (21) lateral wall has seted up keyway (22), fastener (3) are located between fastener mounting hole (42) and keyway (22).

5. The self-centering anti-shudder clamp of claim 1, wherein: the cone angle of the frustum (12) is 60 degrees +/-10'; the cone angle of the taper sleeve (4) is 60 degrees +/-10'.

6. The self-centering anti-shudder clamp of claim 1, wherein: the bottom center hole (111) is a tapered hole with a taper angle of 60 DEG + -10'.

7. The self-centering anti-shudder clamp of claim 1, wherein: the self-centering anti-vibration clamp further comprises a spherical gasket (6) sleeved outside the central column (13), a spherical hole (43) is formed in one end, close to the nut (5), of the taper sleeve (4), and the spherical gasket (6) is matched with the spherical hole (43) by screwing the nut (5).

8. The self-centering anti-shudder clamp of claim 1, wherein: the central axis of the spherical column (11) is vertical to the central axis of the frustum (12).

9. The clamping method of the self-centering anti-vibration clamp for grinding and machining the thin-web-plate gear part is characterized in that: the method comprises the following steps:

s1, matching the lower end of the inner hole of the thin spoke plate gear part (7) with a frustum (12), sequentially installing a taper sleeve (4), a spherical washer (6) and a nut (5), and screwing the nut (5);

s2, pressing the pressing block (2) on the thin spoke plate gear part (7) through the fastener (3);

s3, mounting the lower end of the core rod (1) on the top of the base of the machine tool, and pressing the upper end of the core rod (1) by the upper top of the machine tool.

Technical Field

The invention relates to the field of gear grinding clamps, in particular to a self-centering anti-vibration clamp for gear grinding machining of a thin-spoke-plate gear part and a clamping method.

Background

The design of aeroengine parts gradually develops towards the directions of light weight, heavy load and high speed, the production requirement is high, and the processing difficulty is high. The high-performance engine gear has the characteristics of high power-weight ratio, high strength, high rotating speed, high requirements on dynamic balance precision and the like, a thin radial plate structure is generally adopted, the diameter of the gear is large in the production process, the thickness-diameter ratio of the radial plate is small, and the quality requirements on the tooth surface are high. Procedure of grinding teeth

The existing gear grinding process mainly adopts a structure of clamping a pressure plate clamp and an excircle of a partPositioning, wherein the clamp supports against the end face of the upper teeth of the radial plate and tightly presses and fixes the end face of the lower teeth of the radial plate; the lower end of the clamp is fixed with a machine tool, the upper end of the machine tool top support clamp, the clamp of the type is adopted to grind the teeth, the part is difficult to clamp and align, the tooth width is small in the machining process, the tooth part is easy to vibrate, the tooth surface quality of the processed tooth direction and the like is poor, the design requirement cannot be met, the dynamic unbalance of the part is further influenced, and the use safety and the service life of the part are further influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a self-centering anti-vibration clamp and a clamping method for machining the gear grinding of a thin-web gear part, wherein the self-centering anti-vibration clamp can realize quick clamping and alignment of the part and effectively prevent vibration and shock during part machining.

In order to solve the technical problems, the invention adopts the following technical scheme:

a self-centering anti-vibration clamp for grinding teeth of thin-web-plate gear parts comprises a core rod, a taper sleeve and a nut, wherein the core rod sequentially comprises a spherical column, a frustum, a central column and an external thread from bottom to top, the nut is matched with the external thread, and the taper sleeve is sleeved outside the central column; the thin spoke plate gear part comprises a through hole shaft and a thin-wall spoke plate, and the lower end of an inner hole of the through hole shaft is matched with the frustum; the taper sleeve is positioned between the through hole shaft and the nut, the lower end of the taper sleeve is matched with the upper end of the inner hole of the through hole shaft, and the nut is screwed up to fix the through hole shaft between the taper sleeve and the frustum; the lower end and the upper end of the core rod are respectively provided with a bottom center hole and a top center hole, the bottom center hole is used for being matched with a base top of a machine tool, and the top center hole is used for being matched with an upper top of the machine tool.

As a further improvement to the above technical solution:

from centering anti-shake anchor clamps still include the briquetting, the briquetting is equipped with the briquetting centre bore along axial direction, the taper sleeve is located to briquetting centre bore cover and is fixed with the taper sleeve, the briquetting contacts and compresses tightly the last tooth terminal surface of radials with the radials of thin radials gear part.

The self-centering anti-vibration clamp further comprises a fastener, and the fastener fixes the taper sleeve and the pressing block.

The taper sleeve is characterized in that a fastener mounting hole is formed in the outer wall of the taper sleeve, a key groove is formed in the side wall of the center hole of the pressing block, and the fastener is located between the fastener mounting hole and the key groove.

The cone angle of the frustum is 60 degrees +/-10'; the taper angle of the taper sleeve is 60 DEG +/-10'.

The bottom center hole is a tapered hole, and the taper angle of the tapered hole is 60 +/-10'.

The self-centering anti-vibration clamp further comprises a spherical washer sleeved outside the central column, a spherical hole is formed in one end, close to the nut, of the taper sleeve, and the spherical washer is matched with the spherical hole by screwing the nut.

The central axis of the spherical column is vertical to the central axis of the frustum.

As a general inventive concept, the invention provides a clamping method of a self-centering anti-vibration clamp for gear grinding machining of a thin-web gear part, which comprises the following steps:

s1, matching the lower end of the inner hole of the thin spoke plate gear part with a frustum, sequentially installing a taper sleeve, a spherical washer and a nut, and screwing the nut;

s2, pressing the pressing block on the thin spoke plate gear part through the fastener;

s3, the lower end of the self-centering anti-vibration clamp is mounted on the top of a base of the machine tool, and the upper end of the clamp is pressed by the upper top of the machine tool.

Compared with the prior art, the invention has the advantages that:

the invention can simultaneously realize the quick alignment of part clamping and the effective vibration resistance of part grinding processing, takes the upper end and the lower end of the inner hole of the through hole shaft as positioning fixing surfaces, fixes the thin radial plate gear part by means of the core rod and the taper sleeve, realizes the quick alignment of the part clamping, improves the mounting efficiency of the thin radial plate gear part and ensures the mounting precision of the thin radial plate gear part, and can effectively control the processing vibration of the thin radial plate gear part and improve the processing quality of the tooth surface of the part during grinding processing.

The invention also comprises the pressing block, the rigidity of the tooth part of the part is increased by depending on the weight of the pressing block, the tooth part of the part is effectively prevented from vibrating in the machining process, and the thin-web gear part is prevented from vibrating in the grinding process, so that the quality of the part is improved.

Drawings

FIG. 1 is a schematic view of the construction of a thin web tooth component.

FIG. 2 is a schematic view of the self-centering anti-shudder clamp of the present invention in conjunction with a thin web tooth component.

Fig. 3 is a schematic structural view of the self-centering anti-flutter clip of the present invention.

FIG. 4 is a schematic view of the structure of the mandrel of the present invention.

FIG. 5 is a schematic view of the bottom hole structure of the present invention.

Fig. 6 is a sectional view taken along line a-a in fig. 4.

FIG. 7 is a schematic diagram of the structure of the compact of the present invention.

Fig. 8 is a sectional view taken along line B-B of fig. 7.

Fig. 9 is a schematic structural view of the drogue of the present invention.

Fig. 10 is a schematic view of the nut of the present invention.

The reference numerals in the figures denote: 1. a core rod; 11. a spherical column; 111. a bottom center hole; 12. a frustum; 13. a central column; 14. an external thread; 2. briquetting; 21. pressing a central hole; 22. a keyway; 3. a fastener; 4. a taper sleeve; 41. a taper sleeve central hole; 42. a fastener mounting hole; 43. a spherical hole; 5. a nut; 6. a spherical washer; 7. a thin web gear component; 71. a through-hole shaft; 72. a thin-walled web;

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples. Unless otherwise specified, the instruments or materials employed in the present invention are commercially available.

Example 1:

as shown in fig. 1 to 10, the self-centering anti-vibration clamp for grinding teeth of a thin-web gear part comprises a core rod 1, a taper sleeve 4 and a nut 5, wherein the core rod 1 sequentially comprises a spherical column 11, a frustum 12, a central column 13 and an external thread 14 from bottom to top, the nut 5 is matched with the external thread 14, and the taper sleeve 4 is sleeved outside the central column 13; the thin spoke plate gear part 7 comprises a through hole shaft 71 and a thin spoke plate 72 which is circumferentially arranged on the outer wall of the through hole shaft 71, an inner hole of the through hole shaft 71 penetrates through the central column 13, and the lower end of the inner hole is matched with the frustum 12; the taper sleeve 4 is positioned between the through hole shaft 71 and the nut 5, the lower end of the taper sleeve 4 is matched with the upper end of the inner hole of the through hole shaft 71, and the nut 5 is screwed up to fix the through hole shaft 71 between the taper sleeve 4 and the frustum 12; the lower end and the upper end of the core rod 1 are respectively provided with a bottom center hole 111 and a top center hole, the bottom center hole 111 is used for being matched with a base top of a machine tool, and the top center hole is used for being matched with an upper top of the machine tool.

The invention can simultaneously realize the quick alignment of part clamping and the effective anti-vibration and anti-vibration of part grinding, takes the upper end and the lower end of the inner hole of the through hole shaft 71 as positioning and fixing surfaces, fixes the thin radial plate gear part by means of the core rod 1 and the taper sleeve 4, realizes the quick alignment of the part, improves the mounting efficiency of the thin radial plate gear part and ensures the mounting precision of the thin radial plate gear part, and can effectively control the processing vibration of the thin radial plate gear part during grinding processing, thereby improving the processing quality of the tooth surface of the part.

In this embodiment, the lower end chamfer of the inner hole of the through hole shaft 71 is matched with the frustum 12, and the lower end of the taper sleeve 4 is matched with the upper end chamfer of the inner hole of the through hole shaft 71.

The lower end (the bottom center hole 111) of the self-centering anti-vibration clamp is fixed with the top of a machine tool base, and the upper end (the top of the core rod 1 is provided with a top center hole with the same function as the bottom center hole 111, and the top center hole is not shown in the figure) is supported by the top of the machine tool. The core rod 1 is used for positioning and fixing the thin radial plate gear part 7, the runout of the thin radial plate gear part is detected on the deflection instrument, then the lower top and the upper top of the machine tool base are used for positioning the clamp, the machine tool base passes through the spherical column 11 fixing clamp of the core rod 1, the clamp and the part are driven by the base, the grinding wheel and the part are guaranteed to rotate according to the requirement in rotating speed, and the gear grinding processing is realized.

The self-centering anti-vibration clamp further comprises a pressing block 2, a pressing block center hole 21 is formed in the pressing block 2 in the axial direction, the pressing block center hole 21 is sleeved on the taper sleeve 4 and fixed with the taper sleeve 4, the pressing block 2 is in contact with a thin-wall radial plate 72 of the thin radial plate gear part 7 and compresses the upper tooth end face of the thin radial plate gear part 7, and the rigidity of the part is increased by means of self weight.

The pressing block 2 is arranged in front of the pressing tip (bottom tip) and the upper tip, the lower end face of the pressing block 2 is in contact with the upper tooth end face of the thin-wall radial plate 72 and presses the upper tooth end face of the thin-wall radial plate 72, and the diameter of the excircle of the pressing block 2Diameter of the tooth bottom of the partThere is a relationship: and E + t is F, wherein t is a gap, and t is 2-5 mm.

The pressing block 2 is mainly used for preventing the thin spoke plate gear part 7 from vibrating during grinding processing, so that the quality of the part is influenced. During grinding, the tangential grinding force of the teeth is set to be F, the weight G of the pressing block 2 is set to be G, and the friction coefficient of the pressing block 2 and the thin-web-plate gear part 7 is mu; then there are: g multiplied by mu is larger than beta multiplied by F, wherein beta is a safety coefficient and is 1.5-3. By varying the outer diameter of the compact 2Gear grinding tool capable of meeting requirements of different partsTherefore, one clamp is multipurpose, and the clamp cost is saved.

The self-centering anti-vibration clamp further comprises a fastener 3, and the fastener 3 fixes the taper sleeve 4 and the pressing block 2. In this embodiment, the fastening member 3 is a cylindrical pin. Taper sleeve 4 has seted up taper sleeve centre bore 41 along axial direction, and taper sleeve centre bore 41 cover is located center post 13 outer wall, and fastener mounting hole 42 has been seted up to taper sleeve 4 outer wall, and keyway 22 has been seted up to briquetting centre bore 21 lateral wall, and fastener 3 is located between fastener mounting hole 42 and keyway 22, and keyway 22 and cylindric lock clearance fit for control briquetting 2 is because inertia takes place to rotate when the lathe starts and stops.

The cone angle of the frustum 12 is 60 degrees +/-10'; the cone angle of the cone sleeve 4 is 60 ° ± 10'.

The bottom central bore 111 is a tapered bore having a taper angle of 60 ° ± 10' within which the taper angle can fit most existing tips.

From centering anti-shake anchor clamps still including the spherical packing ring 6 of cover outside locating center post 13, spherical hole 43 has been seted up in the one end that taper sleeve 4 is close to nut 5, screws up nut 5 and cooperatees spherical packing ring 6 and spherical hole 43. The spherical washer 6 is used for effectively controlling the pressing force on the core rod 1, and the core rod 1 is prevented from being deformed when being overlong and the nut 5 is screwed.

The central axis of the spherical column 11 is perpendicular to the central axis of the frustum 12.

In the invention, a ball head tip and an upper tip of a machine tool base support and position a clamp; at the bottom of the mandrel 1The spherical column 11 is required to have coaxiality of two center holes (bottom center hole 111 and top center hole) not more thanThe machine tool base fixes the clamp through the spherical column 11.

The frustum 12 requires that the runout degree of two central holes (the bottom central hole 111 and the top central hole) is not more than 0.005 mm; the central hole of the taper sleeve 4 is required to be in gapless sliding fit with the cylindrical surface of the central column 13 at the upper end of the core rod 1 (see the figure); the high-precision thin-spoke-plate gear part 7 is positioned by the frustum 12 and the taper sleeve 4 of the core rod 1 through inner hole chamfering.

A clamping method of a self-centering anti-vibration clamp for grinding and machining of thin-web-plate gear parts comprises the following steps:

s1, matching the lower end of the inner hole of the thin spoke plate gear part 7 with a frustum 12, sequentially installing a taper sleeve 4, a spherical washer 6 and a nut 5, and screwing the nut 5;

s2, pressing the pressing block 2 on the thin spoke plate gear part 7 through the fastener 3;

and S3, mounting the lower end of the core rod 1 on the top of the base of the machine tool, and pressing the upper end of the core rod 1 by the upper top of the machine tool.

During installation, the spherical washer 6 and the nut 5 are sequentially installed on the core rod 1 to fix the taper sleeve 4, and further fix the thin-web gear part 7. With the self-centering function of the center holes (bottom center hole 111 and top center hole) and the center, alignment is not needed for part installation and fixture installation on a machine tool.

And (3) grinding the teeth after clamping according to the clamping method: grinding parameters and grinding wheel dressing parameters are input as required, the worm grinding wheel grinds the tooth profile and the tooth bottom of the part, and the weight of the pressing block 2 increases the rigidity of the tooth part of the part due to the fact that the tooth part of the part does not slide relative to the pressing block 2, and vibration of the tooth part of the part in the machining process is effectively prevented.

The parts ground and machined after being clamped by the clamp are qualified by 100% through self-inspection and special inspection, and the tooth surface quality is improved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.