CN215393732U

CN215393732U - AB-axis cradle structure

Info

Publication number: CN215393732U
Application number: CN202121301666.2U
Authority: CN
Inventors: 耿新红
Original assignee: Shanghai Aistec Electromechanical Technology Co ltd
Current assignee: Shanghai Aistec Electromechanical Technology Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-01-04
Anticipated expiration: 2031-06-10

Abstract

The utility model relates to an AB shaft cradle structure applied to an AB shaft platform, which comprises a steel shell, an aluminum core, a left end cover and a right end cover, wherein the steel shell is cylindrical with an open left end and a right end and a circular ring-shaped section; the structure of the utility model is enhanced in rigidity, the whole part is not easy to deform when the clamp is loosened when the clamp is jacked up from the holes at the two ends, the increase of internal stress caused by cutting other parts at the later stage is avoided, and the precision of the whole part is ensured.

Description

AB-axis cradle structure

[ technical field ]

The utility model relates to the technical field of AB-axis platforms, in particular to an AB-axis cradle structure applied to the AB-axis platform.

[ background art ]

At present, most of the B-axis fixing seats (also called cradle) which are the most difficult to machine in the existing AB axes (also called machine tool fourth fifth axis) are machined integrally, and the 3C industry pursues light overall weight and needs to have high precision, particularly the concentricity of shaft holes on two sides generally requires about 0.01 mm. The following disadvantages mainly exist:

(1) because the rigidity of the aluminum is lower than that of the steel under the same structural condition, even if the aluminum meets the precision requirement after the aluminum is processed, the cradle can elastically deform when the load is increased in the later use;

(2) under the condition of not changing the structure, the processing rejection rate is higher, and even some processing manufacturers can not do the processing;

(3) when two ends are machined, the ratio of the length to the diameter of the cradle is large, the structure belongs to the category of a slender rod, the phenomenon of cutter vibration can occur during machining, the machined surface is not smooth, and the machined cutter lines are deep.

[ contents of utility model ]

The utility model aims to solve the defects and provide an AB shaft cradle structure, which has enhanced structural rigidity, is not easy to cause overall deformation when a clamp is loosened when being jacked up from two end holes, and does not cause increase of internal stress when other parts are cut off in the later period.

The cradle structure with the AB shaft is designed for achieving the purpose and comprises a steel shell 1, an aluminum core 2, a left end cover 3 and a right end cover 4, the steel shell 1 is cylindrical with an opening at the left end and the right end and a circular ring-shaped section, a semi-circular groove 5 is dug in the middle of the steel shell 1, the aluminum core 2 is an aluminum core shaft with a semicircular section, a rectangular groove 6 which is through along the axial direction is dug in the aluminum core 2, the outer circular surface of the aluminum core 2 is matched and connected with the inner circular surface of the steel shell 1, the aluminum core 2 is nested in the steel shell 1, and the aluminum core 2 and the steel shell 1 are in interference fit, the inner circular surfaces of the circular rings at the left and right ends of the steel shell 1 are respectively in fit connection with the outer circular surfaces of the left end cover 3 and the right end cover 4, the left end cover 3 and the right end cover 4 are embedded into two ends of the steel shell 1 and are in interference fit with the steel shell 1.

Further, the steel housing 1 is made of stainless steel.

Further, the aluminum core 2 is formed by processing an aluminum bar.

Furthermore, threaded holes, through holes and pin holes are machined in the left end cover 3 and the right end cover 4.

Compared with the prior art, the cradle has the advantages that the structure and the processing mode of the aluminum-embedded steel are applied, and the embedded aluminum core is processed in a split mode and embedded, so that on one hand, the structural rigidity is enhanced, when the cradle is jacked from the holes at two ends, the overall deformation is not easy to cause when the clamp is loosened, the processing success rate is increased, and the problem that the cradle can elastically deform when the load is increased in later use in the traditional structure is solved; on the other hand, the utility model can ensure the roundness and the dimensional tolerance of the outer circle by split machining, can not cause the increase of internal stress when other parts are cut off in the later period, ensures the precision of the whole part, and is worthy of popularization and application.

[ description of the drawings ]

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a cross-sectional view A-A of FIG. 2;

FIG. 6 is a schematic front view of the aluminum core of the present invention;

FIG. 7 is a side view of the structure of FIG. 6;

FIG. 8 is a schematic top view of the structure of FIG. 6;

FIG. 9 is a schematic front view of the steel casing of the present invention;

FIG. 10 is a side view of the structure of FIG. 9;

FIG. 11 is a cross-sectional view C-C of FIG. 9;

FIG. 12 is a schematic view of the outer side of the left end cap of the present invention;

FIG. 13 is a schematic view of the inner side of the left end cap of the present invention;

FIG. 14 is a cross-sectional view E-E of FIG. 12;

FIG. 15 is a schematic view of the outer side of the right end cap in the present invention;

FIG. 16 is a schematic view of the inner side of the right end cap in the present invention;

FIG. 17 is a cross-sectional view taken along line D-D of FIG. 15;

in the figure: 1. the aluminum core is composed of a steel shell 2, an aluminum core 3, a left end cover 4, a right end cover 5, a semicircular groove 6 and a rectangular groove.

[ detailed description of the utility model ]

The utility model is further described below with reference to the accompanying drawings:

as shown in the attached drawings, the utility model provides an AB shaft cradle structure, which comprises a steel shell 1, an aluminum core 2, a left end cover 3 and a right end cover 4, wherein the steel shell 1 is made of stainless steel, the aluminum core 2 is processed by aluminum bars, the steel shell 1 is cylindrical with an open left end and a right end and a circular section, a semicircular groove 5 is dug in the middle of the steel shell 1, the aluminum core 2 is an aluminum mandrel with a semicircular section, a rectangular groove 6 which penetrates through the aluminum core 2 along the axial direction is dug in the aluminum core 2, the outer circular surface of the aluminum core 2 is matched and connected with the inner circular surface of the steel shell 1, the aluminum core 2 is nested in the steel shell 1, the aluminum core 2 and the steel shell 1 are in interference fit, the inner circular surfaces of the circular rings at the left end and the right end of the steel shell 1 are respectively matched and connected with the outer circular surfaces of the left end cover 3 and the right end cover 4, the left end cover 3 and the right end cover 4 are embedded in the two ends of the steel shell 1, and is in interference fit with the steel shell 1; threaded holes, through holes and pin holes are processed on the left end cover 3 and the right end cover 4.

The cradle structure is matched with a linear module for use and applied to an AB shaft platform, and mainly comprises a steel shell, a left end cover, a right end cover and an aluminum core, wherein the steel shell is connected with the aluminum core in a nesting mode. The processing method comprises the steps of firstly, finely processing the inner circle size and the end part size of the aluminum core, and the inner circle size of the steel shell in an interference fit mode, specifically, heating the steel shell, pressing the aluminum core into the steel shell according to the principle of thermal expansion, embedding the aluminum core into the steel shell after cooling, wherein the area of the steel shell matched with the aluminum core is within a half of a circle, so that the excessive aluminum core cannot be removed even if the excessive aluminum core is removed in later processing, end covers at two ends are embedded into two ends of the steel shell in the same mode, firstly, finely processing an excircle and an end face, roughly processing the inner circle and the outline size, and simultaneously, embedding the excircle in the interference fit mode.

The steel shell is made of stainless steel, the outer circle and the end face of the steel shell are turned by a lathe before embedding, the inner circle is machined by a boring machine, and the external dimension is cut by a laser machining method. The aluminum core adopts whole aluminium bar finish turning excircle and terminal surface, and the left end terminal surface size leaves the surplus of several millimeters this moment, and the right-hand member terminal surface does not leave the surplus. The left end cover and the right end cover adopt lathe finish machining of excircle and end face size, and simultaneously NC machining of inner contour and rough machining of inner circle are used for well machining of a threaded hole, a through hole and a pin hole. The right end face of the steel shell is used as an axial reference, the right end cover is pressed into the steel shell in an interference fit and heating mode, then the temperature of the steel shell is kept continuously, the aluminum core is pressed into the steel shell, after cooling, the size of the left end face of the remaining aluminum core is measured, the extra amount is machined by a lathe, then the steel shell is heated again, and the left end cover is pressed into the steel shell. After the embedding is accomplished, use the excircle of steel shell to process two end cover concentric holes of embedding as the benchmark, at this moment because rough machining accomplishes in earlier stage, the later stage only need the excircle location post processing hole can. Then, processing the redundant part of the aluminum core according to the outline of the steel shell, and finally processing a mounting surface after axially propping and fixing on the turn-milling all-in-one machine; because the shell is made of steel, the structural rigidity is higher than that of an original integrated aluminum part, and the success rate of machining is guaranteed.

The cradle adopts the processing technology of the aluminum-embedded steel mode, the embedded aluminum core adopts split type processing and embedding, the structural rigidity is enhanced, when the cradle is jacked up from the holes at the two ends, the whole cradle is not easy to deform when the clamp is loosened, and meanwhile, the processing success rate is increased; and the roundness and the dimensional tolerance of the outer circle are ensured by split machining, and the increase of internal stress caused by cutting other parts at the later stage is avoided, so that the precision of the whole part is ensured.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims

1. An AB-axis cradle structure is characterized in that: the aluminum core structure comprises a steel shell (1), an aluminum core (2), a left end cover (3) and a right end cover (4), wherein the steel shell (1) is open at the left end and the right end, the section of the steel shell is in a circular cylindrical shape, a semicircular groove (5) is dug in the middle of the steel shell (1), the aluminum core (2) is an aluminum mandrel with a semicircular section, a rectangular groove (6) which penetrates through the aluminum core (2) along the axial direction is dug in the aluminum core (2), the outer circular surface of the aluminum core (2) is matched and connected with the inner circular surface of the steel shell (1), the aluminum core (2) is embedded in the steel shell (1), the aluminum core (2) and the steel shell (1) are in interference fit, the inner circular surfaces at the left end and the right end of the steel shell (1) are respectively matched and connected with the outer circular surfaces of the left end cover (3) and the right end cover (4), and the left end cover (3) and the right end cover (4) are embedded in the two ends of the steel shell (1), and the steel shell (1) is in interference fit with the steel shell.

2. The AB-axis cradle structure of claim 1, wherein: the steel shell (1) is made of stainless steel.

3. An AB-axis bassinet structure as claimed in claim 1 or 2, wherein: the aluminum core (2) is formed by processing an aluminum bar.

4. The AB-axis cradle structure of claim 3, wherein: and threaded holes, through holes and pin holes are processed on the left end cover (3) and the right end cover (4).