WO2023045112A1

WO2023045112A1 - Non-circular workpiece driving fixture for machine tool machining

Info

Publication number: WO2023045112A1
Application number: PCT/CN2021/137724
Authority: WO
Inventors: 金丽丽; 朱伟; 许方富; 赵瑜; 颜建国; 王威
Original assignee: 浙江大学台州研究院
Priority date: 2021-09-27
Filing date: 2021-12-14
Publication date: 2023-03-30
Also published as: CN113814770A; CN113814770B

Abstract

Disclosed in the present invention is a non-circular workpiece driving fixture for machine tool machining, comprising a tip. A coupling sleeve is fixed on the tip. A rear cover sheet metal and a drive ring are sequentially sleeved and fixed to an outer surface of the coupling sleeve. At least one deep groove ball bearing is mounted in an inner cavity enclosed by the coupling sleeve, the rear cover sheet metal, and the drive ring. A rotary clip is sleeved in the middle of an outer side surface of the drive ring along an axial direction of the drive ring. A plurality of guide rods and a plurality of limiting screws extend on the outer side surface of the drive ring along the axial direction thereof. One end of each guide rod is inserted into the drive ring, and the other end of the guide rod is fixed to a floating member. One end of each limiting screw is fixed onto the drive ring, and the other end of the limiting screw penetrates through a T-shaped counterbore of the floating member, and is clamped on an outer side of the bore by means of a nut on an end portion of the limiting screw. A driving member is coaxially fixed in the floating member. The floating member is fixed onto each guide rod. The driving member is provided with a special-shaped hole adapted to fit a non-circular workpiece. The present invention can be used for driving a non-cylindrical surface workpiece to rotate for machining without manual alignment, automation is easy to achieve, and the clamping time is reduced.

Description

Non-circular Workpiece Driving Fixtures for Machine Tool Machining

technical field

The invention relates to a non-circular workpiece driving fixture for machine tool processing.

Background technique

When the machine tool grinds the peripheral surface of the workpiece, it needs to use the corresponding chuck to clamp the workpiece and drive the workpiece to rotate to cooperate with the machine tool for processing. Existing machine tools can use three-point clamping fixtures for cylindrical workpieces, but it is not easy to clamp special-shaped workpieces such as toothed parts with non-circular ends. Use a clamp with a slot for non-circular workpieces. The workpiece is not necessarily aligned with the card slot during the centering process of the tip, and manual correction is required, which has a great impact on machining accuracy and machining efficiency.

Contents of the invention

The purpose of the present invention is to solve the technical problems involved in the above-mentioned background art.

In order to achieve the purpose of the above invention, the present invention provides a non-circular workpiece driving fixture for machine tool processing, which includes a top, on which a connecting sleeve is axially sleeved and fixed, and the outer surface of the connecting sleeve is sequentially sleeved along its axial direction The back cover sheet metal and the drive ring are fixed, and at least one deep groove ball bearing is sleeved in the inner cavity formed by the connection sleeve, the back cover sheet metal and the drive ring, and the drive ring The middle part of the outer surface is sleeved with a circlip along its axial direction, and a plurality of guide rods and a plurality of limit screws extend along the outer surface of the drive ring in the axial direction, and one end of each guide rod can be movably inserted into the In the driving ring, the other end is fixed as a whole with the floating part; one end of each limit screw is fixed on the driving ring, and the other end passes through the T-shaped counterbore of the floating part and passes through the screw at the end. The cap is stuck on the outside of the T-shaped counterbore, and a driving piece is coaxially fixed in the floating piece, and the floating piece is fixed on each of the guide rods; the driving piece has a special shape suitable for matching a non-circular workpiece hole.

Further, the driving member has a tapered surface of a chute suitable for central positioning of a non-circular workpiece.

Further, a sealing ring is set between the connecting sleeve and the driving ring.

Further, there are three deep groove ball bearings arranged axially side by side.

Further, a spring positioning step extends along the edge of the through hole on the outer surface of the driving ring, and the snap ring is sleeved on the spring positioning step.

Further, the driving ring is respectively provided with a toggle groove, a guide rod slide groove and a threaded hole; the toggle groove cooperates with the power head of the machine tool to stir the rotation of the drive ring, and the guide rod slide groove is used for The guide of the guide rod, the threaded hole is used for installing the limit screw.

Compared with prior art, the beneficial effect of the present invention is:

It can be used to drive tooth-shaped parts and other non-cylindrical workpieces to rotate. When clamping the workpiece, you only need to align the workpiece with the tip and tighten the two ends to complete the clamping. During the processing, the non-circular workpiece is automatically inserted into the slot without Manual alignment, simple operation, easy to realize automation, reduce clamping time and improve work efficiency.

Description of drawings

Fig. 1 is a sectional view of an embodiment of the present invention;

Fig. 2 is a three-dimensional schematic diagram of an embodiment of the present invention;

Fig. 3 is a schematic structural view of a driving ring in an embodiment of the present invention;

Fig. 4 is a structural schematic diagram of a driving member in an embodiment of the present invention;

Fig. 5 is a usage status diagram of an embodiment of the present invention;

Figure 6 is a partial enlarged view of Figure 5;

Fig. 7 is a schematic structural diagram of a limit screw in an embodiment of the present invention.

In the figure, top 1, connecting sleeve 2, set screw 3, drive ring 4, toggle groove I, guide rod slide groove II, threaded hole III, spring positioning step IV, back cover sheet metal 5, deep groove ball bearing 6 , circlip 7, sealing ring 8, spring 9, guide rod 10, floating member 11, driver 12, special-shaped hole 121, chute taper 122, limit screw 13, nut 131, non-circular workpiece 14.

Detailed ways

The present invention will be preferably described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-7, an embodiment of the non-circular workpiece driving fixture for machine tool processing of the present invention includes a top 1, and a connecting sleeve 2 is sleeved and fixed on the top 1 in the axial direction, and the outer surface of the connecting sleeve 2 The surface is sequentially sleeved and fixed with a back cover sheet metal 5 and a drive ring 4 along its axial direction, and the inner cavity formed by the connection sleeve 2, the back cover sheet metal 5 and the drive ring 4 is sleeved in the connection sleeve 2 At least one deep groove ball bearing 6 is installed, and the middle part of the outer surface of the drive ring 4 is sleeved with a snap spring 7 along its axial direction, and a plurality of guide rods 10 extend along the axial direction on the outer surface of the drive ring 4 and a plurality of limit screws 13, one end of each guide rod 10 can be movably inserted into the drive ring 4, and the other end is fixed with the floating member 11; one end of each limit screw 13 is fixed on the On the driving ring 4, the other end passes through the T-shaped counterbore of the floating member 11 and is stuck on the outside of the T-shaped counterbore through the nut 131 at its end, and the inside of the floating member 11 is coaxially fixed by screws There is a driving element 12 , and the floating element 11 is fixed on each of the guide rods 10 by screws; The driving ring 4 is respectively provided with a toggle groove I, a guide rod chute II and a threaded hole III; the toggle groove I cooperates with the power head of the machine tool to stir the rotation of the driving ring 4, and one end of the guide rod 10 is movable The ground is inserted into the guide rod slide groove II for guidance, and the limit screw 13 is fixed with the drive ring 4 through the threaded hole III.

The guide rod 10 and the floating part 11 are fixed by set screws, and the floating part 11 and the driving part 12 are fixed by set screws, that is, the guide rod 10, the floating part 11 and the driving part 12 are fixed as a whole . The guide rod 10 plays a guiding role on the one hand, and the floating member 11 and the driving member 12 all move along the limit screw 13 according to the preset trajectory of the guide rod 10 (ie, the guide rod chute II). When rotating, the guide rod 10 inserted in the driving ring 4 drives the floating part 11 and the driving part 12 to rotate together. The moving space of the guide rod 10 is the guide rod chute II in the drive ring 4, the limit screw 13 is fixed at the end of the drive ring 4, and at the end of the floating part 11, the diameter of the nut 131 of the limit screw 13 Greater than the diameter of its screw rod part, the nut 131 stuck on the outside of the T-shaped counterbore of the floating part 11 (that is, the screw part of the limit screw 13 passes through the smaller diameter part of the T-shaped counterbore, and the nut 131 is located at the T-shaped counterbore. The larger part of the diameter in the type counterbore) restricts the floating member 11 to slide out from the stop screw 13, so that the guide rod 10 will not slip out of the drive ring 4, and the floating member 11 can only be placed between the drive ring 4 and the nut two at most. floating between.

When working, the top 1 is installed on the fixed end of the power head of the machine tool and fixed, and the non-circular workpiece 14 rests on the surface of the top 1 for center positioning, and at the same time pushes against the surface of the driving part 12 to compress the spring 9 and the floating part 11, and the power head of the machine tool moves The toggle groove 1 of the driving ring 4 rotates, and then drives the floating part 11 and the driving part 12 to rotate. When the special-shaped hole 121 of the driving part 12 rotates to match the non-circular workpiece 14, the spring 9 pops up, and the driving part 12 is nested in the The non-circular workpiece 14 is placed on and drives the non-circular workpiece 14 to rotate, so that the non-circular workpiece 14 can be processed in cooperation with the machine tool.

In one embodiment, as shown in FIG. 4 , the driving member 12 has a tapered chute surface 122 suitable for centrally positioning the non-circular workpiece 14 , and a plurality of tapered chute surfaces 122 surround the edge of the shaped hole 121 . The non-circular end of the non-circular workpiece 14 is initially in surface contact with the driver 12, and the driver 12 rotates and the non-circular workpiece 14 does not rotate at the beginning. Since the non-circular workpiece 14 is subjected to an axial force towards the driver 12, The end of the non-circular workpiece 14 has a certain pressure on the surface of the driver 12, and the existence of the chute conical surface 122 expands the success rate of the non-circular workpiece 14 sliding into the special-shaped hole 121 of the driver 12 during the rotation process, shortening the The docking time of the two can achieve rapid center positioning of the non-circular workpiece 14 .

In one embodiment, as shown in FIG. 1 , a sealing ring 8 is sleeved between the connecting sleeve 2 and the driving ring 4 . Sealing ring 8 can prevent bearing oil from leaking.

In one embodiment, as shown in FIG. 1 , there are three deep groove ball bearings 6 arranged axially side by side. Three deep groove ball bearings 6 can better support the weight of the top 1, etc., making the operation more stable and reliable.

In one embodiment, as shown in FIG. 1 and FIG. 3 , a spring positioning step IV is extended on the outer surface of the drive ring 4 along the edge of the through hole, and the snap ring 7 is sleeved on the spring positioning step IV. . The spring positioning step IV can effectively limit the position of the jumper 7 to prevent the device from being displaced due to vibration during operation.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims

The non-circular workpiece drive fixture for machine tool processing is characterized in that it includes a top (1), and a connecting sleeve (2) is sleeved and fixed on the top (1) in the axial direction, and the outer surface of the connecting sleeve (2) is along its outer surface. The back cover sheet metal (5) and drive ring (4) are sleeved and fixed in sequence in the axial direction, and the inner cavity formed by the connection sleeve (2), the back cover sheet metal (5) and the drive ring (4) is closed At least one deep groove ball bearing (6) is sleeved on the connecting sleeve (2), and the middle part of the outer surface of the driving ring (4) is sleeved with a snap ring (7) along its axial direction, and the driving ring ( 4) There are a plurality of guide rods (10) and a plurality of limit screws (13) extending along the axial direction on the outer surface of the guide rod (10), and one end of each guide rod (10) can be movably inserted into the drive ring (4) Inside, the other end is fixed as a whole with the floating piece (11); one end of each limit screw (13) is fixed on the drive ring (4), and the other end passes through the T-shape of the floating piece (11). The counterbore is clamped on the outside of the T-shaped counterbore by the nut (131) at its end, and the driving part (12) is coaxially fixed in the floating part (11), and the floating part (11) is fixed On each of the guide rods (10); the drive member (12) has a special-shaped hole (121) suitable for fitting a non-circular workpiece (14).
The non-circular workpiece driving fixture for machine tool processing according to claim 1, characterized in that, the driving member (12) has a chute taper surface (122) suitable for central positioning of the non-circular workpiece (14).
The non-circular workpiece driving fixture for machine tool processing according to claim 1, characterized in that, a sealing ring (8) is sleeved between the connecting sleeve (2) and the driving ring (4).
The non-circular workpiece driving fixture for machine tool processing according to claim 1, characterized in that there are three deep groove ball bearings (6) arranged axially side by side.
The non-circular workpiece driving fixture for machine tool processing according to claim 1, characterized in that, the outer surface of the driving ring (4) has a spring positioning step (IV) extending along the edge of the through hole, and the snap ring (7 ) is sleeved on the spring positioning step (IV).
The non-circular workpiece driving fixture for machine tool processing according to claim 1, wherein the driving ring (4) is respectively provided with a toggle groove (I), a guide rod slide groove (II) and a threaded hole (III ); said toggle groove (I) cooperates with the machine tool power head to stir said drive ring (4) to rotate, and said guide rod chute (II) is used for the guidance of said guide rod (10), said The threaded hole (III) is used for installing the stop screw (13).