CN218110025U

CN218110025U - Tool for turning cross shaft

Info

Publication number: CN218110025U
Application number: CN202221954787.1U
Authority: CN
Inventors: 赵德满; 刘波; 潘文博; 刘智; 欧阳佳
Original assignee: Changsha Zt Aero Transimission Co ltd
Current assignee: Changsha Zt Aero Transimission Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-12-23
Anticipated expiration: 2032-07-27

Abstract

The utility model relates to a frock for cross turning, including positioning fixture disc, cross part, positioning fixture disc center department has seted up central locating hole, a plurality of location screw hole has been seted up on the positioning fixture disc, install the location bush on the central locating hole, the central locating hole outside is encircleed and is provided with auxiliary positioning hole, central locating hole top symmetry is provided with first support, second support, first support, second support all set up threaded hole in vertical direction, equal threaded connection has fastening bolt on first support, the second support, cross part bottom is provided with the V-arrangement locating piece, and the V-arrangement locating piece is used for supporting the cross axle of cross part, V-arrangement locating piece bottom fixedly connected with supporting shoe, the supporting shoe bottom fixedly connected with leans on the piece, can guarantee the axiality at axis of ordinates both ends effectively in the course of working, reduces the influence of eccentric force through special design, improves processingquality.

Description

Tool for turning cross axle

Technical Field

The utility model relates to a frock for cross axle turning belongs to the aircraft and actuates system gear drive axle processing field.

Background

The cross drive gear shaft is a key component in an action system of a certain civil aircraft, and due to the specially-removed transmission and connection effects, the structure is designed to be a cross structure, as shown in fig. 4, the total length of a transverse shaft 12 is 112mm, the transmission effect is achieved, a spline 13 is respectively arranged in an inner cavity and an outer circle, a longitudinal shaft plays a role in connection, the structure is thin, the direct minimum place is phi 9mm, the lengths of two ends of the shaft are different, english threads are arranged, longitudinal shafts and transverse shafts are staggered at 1/3 positions, the structure is actually an eccentric structure, the structure is mainly processed on a numerical control vehicle, and a plurality of processing problems exist generally:

(1) The part is an eccentric cross structure, two ends of a longitudinal shaft and a transverse shaft have strict coaxiality requirements, the two shafts have strict verticality requirements, particularly when a longitudinal shaft 11 is machined (see figure 2), one end is directly clamped, the other end is machined by turning, the other end is additionally provided with the transverse shaft due to the fact that the clamping part is thin, the weight is heavy, the part is extremely easy to be eccentric in the rotating process, the centers of the two ends can generate large differences, and finally the size is unqualified.

(2) The size of an aviation product is strict, a precision lathe is generally adopted for turning, the precision of a lathe spindle is quite high, and when the product with the cross shaft structure is machined, the spindle precision is reduced and the machine tool precision is influenced due to the fact that parts are eccentric and the machine tool spindle is influenced by eccentric force in the rotating process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves overcomes current defect, provides a frock for cross turning, reduces the influence of eccentric force through special design, improves processingquality, can effectively solve the problem in the background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a frock for cross turning, includes positioning fixture disc, cross part, positioning fixture disc center department has seted up central locating hole, a plurality of location screw hole has been seted up on the positioning fixture disc, install the positioning bush on the central locating hole, the central locating hole outside is encircleed and is provided with auxiliary positioning hole, central locating hole top symmetry is provided with first support, second support, first support, second support all set up threaded hole in vertical direction, equal threaded connection has fastening bolt on first support, the second support, cross part bottom is provided with the V-arrangement locating piece, the V-arrangement locating piece is used for supporting the cross axle of cross part, V-arrangement locating piece bottom fixedly connected with supporting shoe, supporting shoe bottom fixedly connected with leans on the piece.

As a further improvement of the utility model, the first support and the second support are connected with the positioning fixture disc through bolts.

As a further improvement, the number of the auxiliary positioning holes is set to be three, and the semi-circular groove matched with the bottommost auxiliary positioning hole is arranged at the bottom of the support block.

As a further improvement of the present invention, the circle run-out tolerance between the positioning bushing and the center positioning hole is smaller than.mm.

As a further improvement of the utility model, the number symmetry of the V-shaped positioning blocks is set to two, and the V-shaped positioning blocks are fixedly connected with the supporting blocks through screws.

As a further improvement of the utility model, the backup block passes through bolt fixed connection at positioning fixture disc top, the backup block passes through screw fixed connection supporting shoe.

The utility model discloses beneficial effect:

the structure for supporting and fixing the transverse shaft replaces a mode of clamping the small end of the longitudinal shaft, the transverse shaft with the weight accounting for 2/3 of the whole part is fixed on the clamp, the eccentric force of the part in the rotating process is reduced, the turning surface of the part is kept at the central position of a machine tool main shaft as much as possible, and the coaxiality of the two ends of the longitudinal shaft can be effectively ensured;

the balance weight of the part is balanced by adopting a dynamic balance allowance removing mode, so that the center of gravity is kept consistent in the high-speed rotation process of the part, and the influence on the precision of a machine tool spindle is reduced.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is the utility model relates to a frock structure chart for cross axle turning.

Fig. 2 is a side view structure diagram of a tooling for cross axle turning.

Figure 3 is the utility model discloses a frock positioning fixture disc structure chart for cross axle turning.

FIG. 4 is a block diagram of a cross member.

Reference numbers in the figures: 1. positioning a fixture disc; 2. a cross-shaft component; 3. a support block; 4. a V-shaped positioning block; 5. a first support; 6. a second support; 7. fastening a bolt; 8. positioning the bushing; 9. a central positioning hole; 10. auxiliary positioning holes; 11. a longitudinal axis; 12. a transverse axis; 13. a spline; 14. and (6) supporting the block.

Detailed Description

The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention, and the accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the present invention.

In order to make the technical means, the creative features, the achievement objects and the functions of the present invention easy to understand, in the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or the position relation based on the figure, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as the limitation of the present invention, and in addition, the terms "first", "second" and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance, and the present invention is further explained below with reference to the specific embodiments.

Examples

As shown in fig. 1-3, a tool for turning a cross shaft comprises a positioning fixture disc 1, a screw, a pin, a nut, a positioning bush 8, a pressing block, a V-shaped positioning block 4, a support block 3, a support block 14 and a support, wherein one end of the positioning bush 8 is connected with a lathe spindle, the other end of the positioning bush is connected with the positioning fixture disc 1, the rest parts are all fixed on the positioning fixture disc 1, the V-shaped positioning block 4 is used for supporting the cross shaft of the cross shaft, the position degree of the supporting center of the V-shaped positioning block 4 relative to the bottom surface and the side surface of the positioning fixture disc 1 needs to be controlled within 0.02mm, the verticality between the supporting surface of the positioning fixture disc 1 and the bottom surface of the positioning fixture disc 1 needs to be controlled within 0.01mm, and the positioning fixture disc 1 and the positioning bush 8 need to be ground after being combined so as to ensure that the excircle runout of the positioning bush 8 and the positioning fixture disc 1 is controlled within 0.01mm.

As a further improvement to the above technical solution:

after the clamp is assembled, the part needs to be clamped for dynamic balance, and the integral unbalance is controlled to be not more than 50g.mm in a mode of removing the allowance of the disc.

The utility model provides a frock for cross axle turning, includes positioning fixture disc 1, cross axle part 2, positioning fixture disc 1 center department has seted up central locating hole 9, a plurality of location screw hole has been seted up on the positioning fixture disc 1, install positioning sleeve 8 on the central locating hole 9, the outside of central locating hole 9 is encircleed and is provided with auxiliary positioning hole 10, central locating hole 9 top symmetry is provided with first support 5, second support 6, first support 5, second support 6 all set up the screw hole in vertical direction, equal threaded connection has fastening bolt 7 on first support 5, the second support 6, cross axle part 2 bottom is provided with V-arrangement locating piece 4, V-arrangement locating piece 4 is used for supporting the cross axle of cross axle part 2, V-arrangement locating piece 4 bottom fixedly connected with supporting shoe 14, supporting shoe 14 bottom fixedly connected with of supporting shoe 3.

In this embodiment, the first support 5 and the second support 6 are fixedly connected to the positioning jig disc 1 by bolts.

In this embodiment, the number of the auxiliary positioning holes 10 is three, and the bottom of the support block 3 is provided with a semicircular groove matched with the bottommost auxiliary positioning hole 10.

In this embodiment, the tolerance of the circular runout between the positioning bush 8 and the center positioning hole 9 is less than 0.01mm.

In this embodiment, the number of the V-shaped positioning blocks 4 is symmetrically two, and the V-shaped positioning blocks 4 are fixedly connected with the supporting blocks 14 through screws.

In this embodiment, the support block 3 is fixedly connected to the top of the positioning fixture disc 1 through a bolt, and the support block 3 is fixedly connected to the support block 14 through a screw.

The utility model discloses follow following step when using:

step 1: fixing a support, a supporting block 14, a support block 3 and the like on the positioning fixture disc 1;

step 2: combining the positioning fixture disc 1 with the positioning bush 8, and ensuring the requirements of relevant geometric tolerance by grinding the end face and the excircle of the upper grinding machine;

and step 3: combining the V-shaped positioning block 4 on the positioning fixture disc 1, aligning the end face and processing the supporting surface of the V-shaped positioning block 4 by the excircle reference to ensure the requirement of position degree;

and 4, step 4: placing the part on the V-shaped positioning block 4, screwing a fixing screw to fix the part, and installing a dynamic balancing machine to confirm the unbalance amount;

and 5: connecting the clamp with a main shaft of a machine tool, and rotating the outer circle of the clamp to align and jump to be not more than 0.05mm;

step 6: and clamping the part, fixing screws at two ends, pressing the excircle of the part, and rotationally aligning to pre-process excircle runout.

The tool for turning the cross shaft is successfully applied to batch production of parts after multiple times of test verification, and the part machining quality and efficiency are greatly improved.

The above is the preferred embodiment of the present invention, the above shows and describes the basic principle and main features of the present invention and the advantages of the present invention, and those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the description only describe the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, and these changes and improvements all fall into the scope of the claimed invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a frock for cross turning, includes positioning fixture disc (1), cross part (2), its characterized in that: the positioning fixture is characterized in that a central positioning hole (9) is formed in the center of the positioning fixture disc (1), a plurality of positioning threaded holes are formed in the positioning fixture disc (1), a positioning bushing (8) is installed on the central positioning hole (9), an auxiliary positioning hole (10) is arranged on the outer side of the central positioning hole (9) in a surrounding mode, a first support (5) and a second support (6) are symmetrically arranged above the central positioning hole (9), threaded holes are formed in the first support (5) and the second support (6) in the vertical direction, fastening bolts (7) are in threaded connection with the first support (5) and the second support (6), a V-shaped positioning block (4) is arranged at the bottom of the cross shaft part (2), the V-shaped positioning block (4) is used for supporting a cross shaft of the cross shaft part (2), a supporting block (14) is fixedly connected to the bottom of the V-shaped positioning block (4), and a supporting block (3) is fixedly connected to the bottom of the supporting block (14).

2. The tooling for cross-shaft turning according to claim 1, characterized in that: the first support (5) and the second support (6) are fixedly connected with the positioning fixture disc (1) through bolts.

3. The tooling for cross-shaft turning according to claim 1, characterized in that: the number of the auxiliary positioning holes (10) is three, and the bottom of the support block (3) is provided with a semicircular groove matched with the bottommost auxiliary positioning hole (10).

4. The tooling for cross-shaft turning according to claim 1, characterized in that: and the circle run-out tolerance between the positioning bushing (8) and the central positioning hole (9) is less than 0.01mm.

5. The tooling for cross-shaft turning according to claim 1, characterized in that: the number of the V-shaped positioning blocks (4) is symmetrically two, and the V-shaped positioning blocks (4) are fixedly connected with the supporting blocks (14) through screws.

6. The tooling for turning the cross shaft according to claim 1, characterized in that: the support block (3) is fixedly connected to the top of the positioning fixture disc (1) through a bolt, and the support block (3) is fixedly connected with the support block (14) through a screw.