CN114043304A

CN114043304A - Chip cutting prevention device for center taper hole of zero positioning fixture

Info

Publication number: CN114043304A
Application number: CN202111395299.1A
Authority: CN
Inventors: 韩芸; 明伟伟; 吴炜; 马铮; 孙云坤; 叶斌; 陈明; 李姚; 安庆龙; 周圣超; 徐锦泱; 朱怡珺; 李晓; 计开顺; 刘洪瑞; 陈子栋
Original assignee: Shanghai Xinlong Tobacco Machinery Factory; Shanghai Jiaotong University
Current assignee: Shanghai Xinlong Tobacco Machinery Factory; Shanghai Jiaotong University
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-02-15

Abstract

The invention relates to a chip-cutting-preventing device for a central conical hole of a zero-point positioning clamp, wherein the zero-point positioning clamp is internally provided with the central conical hole for inserting a blind rivet, the chip-cutting-preventing device comprises a supporting spring, a chip-cutting-preventing seat and a chip-cutting-preventing sealing ring, the supporting spring is placed in the central conical hole, the lower end of the supporting spring abuts against the bottom of the central conical hole, the chip-cutting-preventing seat is placed in the central conical hole and is connected or abutted against the upper end of the supporting spring, and the chip-cutting-preventing sealing ring is arranged on the chip-cutting-preventing seat and is in contact with the wall of the central conical hole; the anti-cutting sealing ring is positioned at the top port of the central taper hole when the blind rivet is not inserted into the central taper hole. The chip-cutting-preventing device is simple in structure and flexible to use, full-motion fitting and sealing of the central taper hole in the clamping process are achieved, tiny impurities such as chips are prevented from entering the interior of the zero-point positioning clamp structure, and replacement is rapid.

Description

Chip cutting prevention device for center taper hole of zero positioning fixture

Technical Field

The invention relates to the field of high-end machine tool equipment, in particular to a chip cutting prevention device for a central taper hole of a zero positioning fixture.

Background

With the rapid development of the manufacturing industry, the product updating frequency is accelerated, the processing customization requirements are increased rapidly, and a more serious challenge is provided for the traditional mass production mode. Therefore, the flexible manufacturing technology is used as the leading direction of the development and innovation of the manufacturing industry, has the advantages of high flexibility, high processing efficiency, high equipment utilization rate and the like, and is very important for strengthening enterprise competitiveness and upgrading the industrial structure.

The zero positioning fixture is an important ring in high-end machine tool equipment as a representative of a new generation of modular fixture, and a high-precision standardized clamping system with uniform zero is established between a machine tool and the fixture through the customized combination of the zero positioning modules. The zero positioning fixture realizes quick positioning and clamping between the tool fixture and a machine tool, reduces the auxiliary time for assembling and disassembling the fixture in machining, increases the automation degree of machining, and is widely applied to the mechanical manufacturing industry.

However, during machining, chipping is unavoidable and has a great influence on the stability, accuracy and service life of the jig. Particularly, due to the special structural limitation of the zero point positioning clamp, chips are easy to accumulate in the positions of a central hole, a steel ball groove and the like in the replacing and installing process, and the chips are extremely difficult to remove once entering. The problem can not be solved, and the quick replacement, accurate positioning and stable clamping of the zero positioning clamp can not be ensured.

Disclosure of Invention

In view of the above disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a chip-cutting prevention device for a central tapered hole of a zero-point positioning fixture, which has a simple structure and is flexible to use, can realize the whole sealing function of the zero-point positioning fixture during the working process, and can realize the passive blocking of impurities such as chips, and the replacement is rapid.

In order to achieve the above object, the present invention provides a chip-cutting prevention device for a central conical hole of a zero point positioning fixture, wherein the zero point positioning fixture is provided with the central conical hole for inserting a blind rivet, the chip-cutting prevention device comprises a support spring, a chip-cutting prevention seat and a chip-cutting prevention sealing ring, the support spring is placed in the central conical hole, the lower end of the support spring abuts against the bottom of the central conical hole, the chip-cutting prevention seat is placed in the central conical hole, the chip-cutting prevention seat is connected with or abuts against the upper end of the support spring, and the chip-cutting prevention sealing ring is installed on the chip-cutting prevention seat and contacts with the wall of the central conical hole; the anti-cutting sealing ring is positioned at the top port of the central taper hole when the blind rivet is not inserted into the central taper hole.

Further, an annular groove is formed in the outer side face of the chip-preventing seat, and the chip-preventing sealing ring is mounted in the annular groove.

Further, prevent the smear metal seat including lower, upper seat and set up the regulation locking mechanism between lower and upper seat, prevent that the smear metal sealing washer is located between lower and upper seat to it is tight to be pressed from both sides by lower and upper seat, adjust locking mechanism and can adjust lower and upper seat and be close to or the phase separation mutually, and can lock the relative position of lower and upper seat.

Furthermore, the lower end face of the chip-preventing sealing ring is perpendicular to the inner side face and the outer side face, the upper end face of the chip-preventing sealing ring is a conical face and inclines towards the inner side, a limiting plane which is attached to the lower end face of the chip-preventing sealing ring is arranged at the upper end of the lower seat, and a limiting conical face which is attached to the upper end face of the chip-preventing sealing ring is arranged at the lower end of the upper seat.

Further, the adjusting and locking mechanism comprises an adjusting bolt, the adjusting bolt penetrates through the upper seat and is in threaded connection with the lower seat, and a nut of the adjusting bolt is located below the upper end face of the upper seat.

Furthermore, the lower end of the upper seat is provided with a limiting block, and the limiting block is used for abutting against the lower seat.

Further, the lower end of the chip-preventing seat is provided with an annular clamping groove, and the upper end of the supporting spring is located in the annular clamping groove.

Furthermore, a protruding limiting round table is arranged at the lower end of the chip preventing seat, and the upper end of the supporting spring is sleeved on the limiting round table.

Further, the upper end of the chip-preventing seat is provided with a matching plane for contact matching with the blind rivet.

Further, the supporting spring is made of high-strength spring steel.

As described above, the chip-cutting prevention device according to the present invention has the following advantageous effects:

through setting up supporting spring, preventing the chip seat and preventing the chip sealing washer, during the use, will prevent that the chip device packs into zero point positioning fixture's central taper hole can, simple to operate, supporting spring play and supports and prevent the chip seat effect to enable its activity in central taper hole, prevent the chip sealing washer and contact with central taper hole pore wall, play sealed effect. When the blind rivet is inserted into the central taper hole, the blind rivet keeps propping against the upper end of the anti-cutting seat, and the supporting spring is compressed. When the zero positioning fixture is loosened, the blind rivet is pulled out from the central taper hole, in the pulling-out process, the anti-cutting device is attached to the bottom surface of the blind rivet under the action of the supporting spring, the upper end of the anti-cutting seat is always kept attached to the bottom surface of the blind rivet, the anti-cutting sealing ring is also always kept in close contact with the wall of the central taper hole, and the function of passively stopping the cutting in the working process of the zero positioning fixture is achieved. The chip cutting prevention device is simple in structure and flexible to use, can be matched with the clamping movement of the zero point positioning clamp, realizes full-movement fitting and sealing of the central taper hole in the clamping process, prevents tiny impurities such as chips from entering the inside of the zero point positioning clamp structure, avoids the influence of the impurities such as the chips on the movement of the inner structure and the function of the zero point positioning clamp, realizes passive blocking of the impurities such as the chips, and is quick to replace.

Drawings

Fig. 1 is a schematic structural view of a chip-preventing device according to the present invention.

Fig. 2 is an assembly view of the chip preventing seat and the chip preventing seal ring of the present invention.

Fig. 3 is a schematic structural view of the anti-cutting seal ring of the present invention.

Fig. 4 is a schematic view showing the operation of the anti-cutting device of the present invention when the blind rivet is inserted.

Description of the element reference numerals

1 zero point positioning base

2 clamping spring

3 piston

4 zero point positioning upper cover

5 supporting table

6 steel ball

7 center taper hole

8 support spring

9 chip cutting prevention seat

91 lower seat

92 upper seat

93 adjusting bolt

94 annular groove

95 ring-shaped clamping groove

96 position-limiting round table

97 mating plane

98 limiting block

10 prevent cutting bits sealing washer

11 blind rivet

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1 to 4, the present invention provides a chip cutting prevention device for a center taper hole 7 of a zero point positioning fixture, the zero point positioning fixture is provided with a center taper hole 7 for inserting a blind rivet 11, referring to fig. 1, in the zero point positioning fixture shown in fig. 1, the zero point positioning fixture comprises a zero point positioning base 1, a clamping spring 2, a piston 3, a zero point positioning upper cover 4, a supporting table 5, a steel ball 6, and a blind rivet 11, the piston 3 is arranged in the zero point positioning base 1, the clamping spring 2 is arranged at the lower end of the piston 3, the zero point positioning upper cover 4 is arranged below the piston 3, a sealed cavity is arranged between the zero point positioning upper cover 4 and the piston 3, an air passage is arranged in the zero point positioning upper cover 4 for inflating the sealed cavity, inner holes are arranged between the supporting table 5 and the zero point positioning upper cover 4, together forming the center taper hole 7 for inserting the blind rivet 11, the piston 3 is pushed by air pressure of the air passage inner cavities in the clamping spring 2 and the zero point positioning upper cover 4, the steel balls 6 are driven to move inwards or outwards on the inclined plane at the upper end of the support table 5, so that the blind rivet 11 is clamped and loosened. When the zero point positioning clamp is clamped, the air passage is closed, the piston 3 moves upwards under the action of the clamping spring 2 to push the steel ball 6 to contract inwards and attach to the conical surface of the middle part of the blind rivet 11, and the blind rivet 11 is clamped. When the zero point positioning clamp is loosened, the air path is opened, the piston 3 is compressed by the pressure in the sealing cavity to move downwards, the steel ball 6 loses thrust and retreats backwards along the inclined plane at the top of the support table 5 under the action of gravity, and the blind rivet 11 is loosened. Of course, the zero point positioning jig is not limited to the above-described configuration, and may be in other configurations, but they have a central tapered hole 7 for inserting the blind rivet 11.

The anti-cutting device comprises a supporting spring 8, an anti-cutting seat 9 and an anti-cutting sealing ring 10, wherein the supporting spring 8 is arranged in a central conical hole 7, the lower end of the supporting spring 8 abuts against the bottom of the central conical hole 7, the anti-cutting seat 9 is arranged in the central conical hole 7, the anti-cutting seat 9 is connected with or abuts against the upper end of the supporting spring 8, and the anti-cutting sealing ring 10 is arranged on the anti-cutting seat 9 and is in contact with the wall of the central conical hole 7; the anti-cutting chip sealing ring 10 is positioned at the top end opening of the central taper hole 7 when the blind rivet 11 is not inserted into the central taper hole 7.

The basic working principle of the chip cutting prevention device provided by the invention is as follows: when the anti-cutting device is used, referring to fig. 1, the anti-cutting device is arranged in the central taper hole 7 of the zero-point positioning fixture, the installation is convenient, the supporting spring 8 plays a role of supporting the anti-cutting seat 9 and can move in the central taper hole 7, and the anti-cutting sealing ring 10 is in contact with the wall of the central taper hole 7 to play a role of sealing. When the zero point positioning fixture is clamped, referring to fig. 4, the blind rivet 11 is inserted into the central tapered hole 7 and is held against the upper end of the chip preventing seat 9, and the supporting spring 8 is compressed, and the elastic force provided by the supporting spring can also keep the blind rivet 11 stable in the axial direction. When the zero positioning fixture is loosened, the blind rivet 11 is pulled out from the central taper hole 7, and in the pulling-out process, the anti-cutting device is attached to the bottom surface of the blind rivet 11 under the action of the supporting spring 8, the upper end of the anti-cutting seat 9 is always kept attached to the bottom surface of the blind rivet 11, the anti-cutting sealing ring 10 is also always kept in close contact with the hole wall of the central taper hole 7, and the function of passively stopping cutting chips in the working process of the zero positioning fixture is achieved. When the blind rivet 11 is completely pulled out of the central taper hole 7, as shown in fig. 1, the supporting spring 8 supports the anti-cutting seat 9, so that the anti-cutting seat 9 and the anti-cutting sealing ring 10 are positioned at the top port of the central taper hole 7 and above the steel ball 6, thereby keeping the sealing and blocking of the central taper hole 7 and preventing the cutting from entering. The chip cutting prevention device is simple in structure and flexible to use, can be matched with the clamping movement of the zero point positioning clamp, realizes full-movement fitting and sealing of the central taper hole in the clamping process, prevents tiny impurities such as chips from entering the inside of the zero point positioning clamp structure, avoids the influence of the impurities such as the chips on the movement of the inner structure and the function of the zero point positioning clamp, realizes passive blocking of the impurities such as the chips, and is quick to replace.

Referring to fig. 1 to 4, the present invention is further illustrated in a specific embodiment as follows:

in the present embodiment, referring to fig. 2, as a preferred design, the chip-preventing seat 9 is substantially circular, and an annular groove 94 is formed on the outer peripheral surface thereof, and the chip-preventing seal ring 10 is mounted in the annular groove 94 and abuts against the upper and lower wall surfaces of the annular groove 94, so as to stabilize the position of the chip-preventing seal ring 10, and keep it stable during the up-and-down movement in the central tapered hole 7, thereby ensuring the sealing effect with the hole wall.

In the present embodiment, further, referring to fig. 2, the chip-preventing seat 9 includes a lower seat 91, an upper seat 92, and an adjustment locking mechanism provided between the lower seat 91 and the upper seat 92, the chip-preventing seal ring 10 is installed between the lower seat 91 and the upper seat 92 and clamped by the lower seat 91 and the upper seat 92, the space between the upper seat 92 and the lower seat 91 forms an annular groove 94, and the adjustment locking mechanism can drive the lower seat 91 and the upper seat 92 to approach or separate from each other and can lock the relative positions of the lower seat 91 and the upper seat 92. With this, can adjust lower seat 91 and upper seat 92 through adjusting locking mechanism and be close to or the phase separation mutually, come to the degree of compressing tightly of preventing chip sealing washer 10, adjust and prevent chip sealing washer 10 deformation degree, thereby can adjust and prevent the most outside footpath size of chip sealing washer 10, can realize the regulatory function of sealed degree, can make and prevent chip sealing washer 10 and satisfy the sealed requirement of the central taper hole 7 of different radius size, can prevent again that too big deformation's problem from appearing in chip sealing washer 10 because of the shrink of central taper hole 7 aperture, the jam that the too big messenger's of sealing washer deformability had been avoided, the wearing and tearing of sealing washer have been reduced.

In the present embodiment, referring to fig. 2 and 3, as a preferred design, the lower end surface of the chip-preventing seal ring 10 is perpendicular to both the inner side surface and the outer side surface, the upper end surface of the chip-preventing seal ring 10 is a conical surface and is inclined inward, referring to fig. 2, that is, the cross section of the chip-preventing seal ring 10 is in the shape of a right trapezoid, the inclined side of the right trapezoid is upward, the upper end of the lower seat 91 is provided with a limit plane attached to the lower end surface of the chip-preventing seal ring 10, the lower end of the upper seat 92 is provided with a limit conical surface attached to the upper end surface of the chip-preventing seal ring 10, and the space between the limit plane and the limit conical surface forms an annular groove 94, by adopting such a design, the upper seat 92 and the lower seat 91 are more stably matched with the chip-preventing seal ring 10, during the clamping process, the outer peripheral surface of the chip-preventing seal ring 10 generates a deformed shape with an inward center and outward convex upper end and a convex end, referring to fig. 2, the deformed area of the upper end and the outer conical hole 7 is attached to the surface, thereby further improving the contact sealing effect of the anti-cutting sealing ring 10 on the central taper hole 7.

In the present embodiment, referring to fig. 1, as a preferred design, the adjusting and locking mechanism comprises an adjusting bolt 93, the adjusting bolt 93 passes through the upper seat 92 and is screwed into the lower seat 91, and the nut of the adjusting bolt 93 is positioned below the upper end face of the upper seat 92, so that the contact fit of the upper seat 92 and the blind rivet 11 is not hindered. Specifically, a countersunk through hole is formed in the middle of the upper seat 92, a threaded hole is formed in the middle of the lower seat 91, the adjusting bolt 93 can be a cross countersunk bolt, and the cross countersunk through hole penetrates through the countersunk through hole of the upper seat 92 and is screwed into the threaded hole of the lower seat 91, so that the clamping degree of the chip sealing ring of the upper seat 92 and the lower seat 91 can be adjusted by rotating the adjusting bolt 93, and a stable locking state is kept. Of course, in other embodiments, the adjusting and locking mechanism may adopt other suitable structures, and the above-mentioned clamping and adjusting function can be achieved. Further preferably, a limiting block 98 is arranged at the lower end of the upper seat 92, and the limiting block 98 is used for abutting against the lower seat 91 so as to limit the minimum distance between the upper seat 92 and the lower seat 91, thereby avoiding excessive deformation of the anti-cutting sealing ring 10 due to too tight adjustment of the upper seat 92 and the lower seat 91 during adjustment.

In this embodiment, referring to fig. 1, as an optimal design, an annular groove 95 and a protruding limiting circular truncated cone 96 are disposed in a central region of a lower end of the anti-cutting seat 9, that is, a lower end of the lower seat 91, an upper end of the supporting spring 8 is located in the annular groove 95, and the upper end of the supporting spring is sleeved on the limiting circular truncated cone 96, so that the annular groove 95 and the limiting circular truncated cone 96 can stabilize a position of the supporting spring 8, limit a telescopic motion path of the supporting spring, reduce a height-diameter ratio of the supporting spring 8, and improve motion stability of the supporting spring 8. Preferably, an annular groove is also formed at the bottom of the central taper hole 7, that is, on the zero point positioning base 1, and the lower end of the support spring 8 is located in the annular groove to stabilize the position of the lower end of the support spring 8. Wherein, the supporting spring 8 is preferably made of high-strength spring steel, and the rigidity and the stability of the spring are ensured in a long stroke.

In the present embodiment, referring to fig. 2 and 3, as a preferred design, the upper end of the chip-preventing seat 9, i.e. the upper end of the upper seat 92, is provided with a fitting plane 97, the upper end of the adjusting bolt 93 is lower than the fitting plane 97, and the fitting plane 97 is used for ensuring the contact fit of the chip-preventing seat 9 and the blind rivet 11.

From the above, the chip-cutting prevention device in the present embodiment has the following beneficial effects:

1. can realize whole sealing effect of zero point positioning fixture course of work, under supporting spring 8 effects, prevent that cutting bits seat 9 can laminate blind rivet 11 motion, follow-up with it when blind rivet 11 extracts, realized the passive separation to debris such as smear metal, simple structure changes fast.

2. Can realize the regulatory function of sealed degree, prevent the degree of compression of bits sealing washer 10 through adjusting bolt 93 control upper seat 92 and lower seat 91 of bits seat 9, and then the deflection of controlling and preventing bits sealing washer 10 to prevent the cross sectional shape of bits sealing washer 10 through specific setting, and prevent that upper seat 92 and lower seat 91 of bits seat 9 mutually support, produce the center and inwards indent, upper and lower end deformation shape to the evagination. The deformation area with the upper end and the lower end protruding outwards is attached to the surface of the taper hole, so that the sealing function of the anti-cutting sealing ring 10 on the surfaces with different apertures is realized, the application range is wide, the excessive deformation extrusion amount caused by aperture shrinkage is prevented, the blockage caused by excessive deformation force of the anti-cutting sealing ring 10 is avoided, and the abrasion of the anti-cutting sealing ring 10 is reduced.

3. The full-length sealing of the taper hole can be realized, and a good sealing effect can be kept under the insertion and extraction states of the blind rivet 11.

The utility model provides an anti-chip-cutting device can use in various zero point positioning fixture, improves zero point positioning fixture's wholeness ability, makes it become an important ring in high-end lathe is equipped, promotes high-end lathe and equips holistic work efficiency and overall quality.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A chip-cutting prevention device for a zero point positioning fixture central conical hole, wherein a central conical hole (7) for inserting a blind rivet (11) is formed in the zero point positioning fixture, and is characterized in that: the chip cutting prevention device comprises a supporting spring (8), a chip cutting prevention seat (9) and a chip cutting prevention sealing ring (10), wherein the supporting spring (8) is placed in a central conical hole (7), the lower end of the supporting spring (8) is abutted against the bottom of the central conical hole (7), the chip cutting prevention seat (9) is placed in the central conical hole (7), the chip cutting prevention seat (9) is connected or abutted against the upper end of the supporting spring (8), and the chip cutting prevention sealing ring (10) is installed on the chip cutting prevention seat (9) and is in contact with the wall of the central conical hole (7); and the anti-cutting sealing ring (10) is positioned at the top end opening of the central taper hole (7) when the blind rivet (11) is not inserted into the central taper hole (7).

2. A chip-cutting prevention device according to claim 1, wherein: an annular groove (94) is formed in the outer side face of the chip-preventing seat (9), and the chip-preventing sealing ring (10) is installed in the annular groove (94).

3. A chip-cutting prevention device according to claim 1 or 2, characterized in that: the chip-preventing seat (9) comprises a lower seat (91), an upper seat (92) and an adjusting and locking mechanism arranged between the lower seat (91) and the upper seat (92), the chip-preventing sealing ring (10) is positioned between the lower seat (91) and the upper seat (92) and clamped by the lower seat (91) and the upper seat (92), and the adjusting and locking mechanism can adjust the relative positions of the lower seat (91) and the upper seat (92) to be close to or separated from each other and can lock the relative positions of the lower seat (91) and the upper seat (92).

4. A chip-cutting prevention device according to claim 3, wherein: the lower end face and the inner side face and the outer side face of the anti-cutting sealing ring (10) are perpendicular to each other, the upper end face of the anti-cutting sealing ring (10) is a conical face and inclines towards the inner side, a limiting plane which is attached to the lower end face of the anti-cutting sealing ring (10) is arranged at the upper end of the lower seat (91), and a limiting conical face which is attached to the upper end face of the anti-cutting sealing ring (10) is arranged at the lower end of the upper seat (92).

5. A chip-cutting prevention device according to claim 3, wherein: the adjusting and locking mechanism comprises an adjusting bolt (93), the adjusting bolt (93) penetrates through the upper seat (92) and is screwed into the lower seat (91), and a nut of the adjusting bolt (93) is located below the upper end face of the upper seat (92).

6. A chip-cutting prevention device according to claim 3, wherein: the lower end of the upper seat (92) is provided with a limiting block (98), and the limiting block (98) is used for abutting against the lower seat (91).

7. A chip-cutting prevention device according to claim 1, wherein: the lower end of the chip-preventing seat (9) is provided with an annular clamping groove (95), and the upper end of the supporting spring (8) is located in the annular clamping groove (95).

8. A chip-cutting prevention device according to claim 1 or 7, wherein: the lower end of the chip-preventing seat (9) is provided with a convex limiting round table (96), and the upper end of the supporting spring (8) is sleeved on the limiting round table (96).

9. A chip-cutting prevention device according to claim 1, wherein: the upper end of the chip-preventing seat (9) is provided with a matching plane (97) which is used for being in contact fit with the blind rivet (11).

10. A chip-cutting prevention device according to claim 1, wherein: the supporting spring (8) is made of high-strength spring steel.