CN113102960A

CN113102960A - Assembly equipment and method for ensuring coaxiality

Info

Publication number: CN113102960A
Application number: CN202110265083.7A
Authority: CN
Inventors: 蔡海生; 熊雪飞; 陈佳斌
Original assignee: Guangdong Lyric Robot Intelligent Automation Co Ltd
Current assignee: Guangdong Lyric Robot Automation Co Ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-07-13
Anticipated expiration: 2041-03-10
Also published as: CN113102960B

Abstract

The application relates to the technical field of coaxial assembly, in particular to an assembly device and method for ensuring coaxiality. The method comprises the steps of completing press mounting of two workpieces which are pre-mounted; the device comprises a bearing table for bearing a first workpiece, a fixing mechanism for fixing the first workpiece on the bearing table, and a press-fitting mechanism which is abutted against the second workpiece and presses the second workpiece towards the first workpiece; the press-mounting mechanism and the second workpiece are respectively provided with a matched coaxial positioning mechanism; and the coaxial positioning mechanism on the press-mounting mechanism is coaxially arranged with the first workpiece. And then realize through coaxial positioning mechanism that the pressure equipment mechanism is with the end cover coaxial pressure equipment on battery housing, realize guaranteeing the axiality of assembly between two work pieces of battery housing and end cover, improve the assembly precision, improve the battery quality.

Description

Assembly equipment and method for ensuring coaxiality

Technical Field

The application relates to the technical field of coaxial assembly, in particular to an assembly device and method for ensuring coaxiality.

Background

In a plurality of workpiece assembling processes, it is necessary to ensure that the coaxiality of the workpieces is kept consistent to ensure the assembling accuracy. For example, in the production of lithium ion batteries, after the cell is assembled in the housing, an end cap needs to be assembled at the end of the housing. In the end cover assembling process, the gap between the shell and the end cover needs to meet the production requirement, and then the coaxial assembly needs to be completed.

Therefore, at present, there is an urgent need to develop an assembly apparatus for ensuring coaxiality, so as to ensure the assembly accuracy between the end cap and the housing of the lithium ion battery, and to improve the quality of the battery.

Disclosure of Invention

In order to solve one of the technical problems, the application provides an assembling device for ensuring coaxiality, which is used for completing press mounting of two workpieces which are already preassembled; the device comprises a bearing table for bearing a first workpiece, a fixing mechanism for fixing the first workpiece on the bearing table, and a press-fitting mechanism which is abutted against the second workpiece and presses the second workpiece towards the first workpiece; the press-mounting mechanism and the second workpiece are respectively provided with a matched coaxial positioning mechanism; and the coaxial positioning mechanism on the press-mounting mechanism is coaxially arranged with the first workpiece. And then realize through coaxial positioning mechanism that the pressure equipment mechanism is with the end cover coaxial pressure equipment on battery housing, realize guaranteeing the axiality of assembly between two work pieces of battery housing and end cover, improve the assembly precision, improve the battery quality.

Preferably, the coaxial positioning mechanism comprises a positioning column and a positioning hole; and the positioning column or the positioning hole on the press-mounting mechanism is coaxially arranged with the first workpiece. The press-fitting mechanism is coaxial with the first workpiece through the coaxial positioning mechanism, and the assembling precision is ensured.

Preferably, the press-fitting mechanism is provided with a limiting block matched with the end part of the second workpiece in shape; the positioning column or the positioning hole is formed on the limiting block, and the positioning hole or the positioning column is formed on the second workpiece.

Preferably, the device also comprises a hollow rotating platform and a turntable mounting rack; the fixing mechanism is arranged on the turntable mounting frame; the fixing mechanism is connected with the first driving piece through a clamping table structure. Is connected with the first driving piece through the clamping table structure fixing mechanism, and then the first driving piece is connected with the driving fixing mechanism to fix the battery shell,

preferably, the fixing mechanism comprises a slide rail fixed on the turntable mounting rack, a fixing plate slidably arranged on the slide rail, and an elastic component for moving the fixing plate towards the first workpiece; the fixing plate is also provided with a connecting block with a T-shaped groove; the first driving piece of the fixing plate is fixed on the hollow rotating platform and is connected with the connecting block through a boss arranged at the end part of the fixing plate and drives the fixing plate.

Preferably, the fixing mechanisms include at least two fixing mechanisms respectively used for fixing two ends of the first workpiece. And then realize fixing the both ends of casing respectively, ensure that casing centre gripping is firm in the pressure equipment in-process.

Preferably, positioning blocks driven by a third driving piece are arranged on two sides of the second workpiece; the positioning block and the limiting block form a limiting mechanism of the second workpiece, so that the coaxiality of the end cover and the shell is ensured, the press-fitting precision of the end cover and the shell is improved, and the assembling precision is improved.

Preferably, deviation rectifying blocks driven by a second driving piece are arranged on the hollow rotating platform and on two sides of the first workpiece; the deviation rectifying block and the fixing plate form a deviation rectifying and fixing mechanism of the first workpiece. The second driving pieces arranged on two sides of the shell drive the deviation rectifying blocks to move in opposite directions, so that deviation rectification in the horizontal direction of the shell is realized, and the first driving pieces drive the fixing plate to press down the fixing shell to realize accurate assembly.

Based on the assembling device for ensuring the coaxiality, the application also provides an assembling method in another aspect, which comprises the following assembling steps:

a100, a positioning workpiece with the end part shape matched with the limiting block is processed in advance, a positioning pin matched with the positioning hole of the limiting block is arranged on the end face of the positioning workpiece, and the positioning workpiece is placed on a bearing table;

a200, firstly, fixedly installing a fixing mechanism, starting the fixing mechanism to finish deviation rectifying action on a positioning workpiece on a bearing table, and pressing down the fixing mechanism to fix the positioning workpiece;

a300, matching a positioning hole of a limiting block on the press-fitting mechanism with a positioning pin at the end part of a positioning workpiece to realize coaxial press-fitting of the limiting block and the positioning workpiece;

and A400, fixedly mounting the press-mounting mechanism, so that the second workpiece limited by the limiting block is coaxial with the first workpiece fixed by the fixing mechanism.

The present application also provides another assembly method, comprising the following assembly steps:

b100, a positioning workpiece with the end part shape matched with the limiting block is processed in advance, a positioning hole or a positioning pin matched with a positioning column or a positioning hole of the limiting block is arranged on the end face of the positioning workpiece, and the positioning workpiece is placed on the bearing table;

b200, fixedly mounting the press-mounting mechanism, so that a positioning column or a positioning hole of a limiting block on the press-mounting mechanism is matched and positioned with a positioning hole or a positioning pin on a positioning workpiece, and realizing coaxial press-mounting of the limiting block and the positioning workpiece;

b300, fixedly installing the fixing mechanism, and starting the fixing mechanism to press and fix the positioning workpiece on the bearing table; so that the positioning workpiece limited by the limiting block is coaxial with the positioning workpiece fixed by the fixing mechanism.

Compared with the prior art, the beneficial effects of this application are: the battery shell is assembled on the hollow rotary platform through the bearing platform for bearing the battery shell, the fixing mechanism for fixing the battery shell on the bearing platform and the press-mounting mechanism abutting against the end cover and pressing the battery shell towards the shell, the fixing mechanism is arranged on the turntable mounting rack, the turntable mounting rack is rotatably arranged on the hollow rotary platform, the press-mounting mechanism and the end cover are respectively provided with a matched coaxial positioning mechanism, the coaxial positioning mechanism on the press-mounting mechanism is coaxially arranged with the center of the shell, in the press-mounting process, the coaxial positioning mechanism on the press-mounting mechanism is matched with the coaxial positioning mechanism on the end cover, the press-mounting mechanism is further used for coaxially press-mounting the end cover on the battery shell, the coaxiality of assembly between the battery shell and the end cover is ensured, the assembly accuracy is improved, and the press-mounting mechanism and the fixing mechanism are installed by the assembly method, so that the fixing mechanism and the press-mounting mechanism can both ensure, ensures the press-fitting precision and the press-fitting effect, does not need to adjust the coaxiality each time, improves the production efficiency,

drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present application or the prior art will be briefly described below. It should be apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained by those skilled in the art without inventive exercise.

FIG. 1 is a schematic structural diagram of one embodiment of the coaxiality-guaranteeing assembly apparatus of the present application;

FIG. 2 is a rear view block diagram of one embodiment of the disclosed coaxiality ensuring assembly apparatus;

FIG. 3 is a schematic structural diagram of a press-fitting mechanism of one embodiment of the coaxiality-guaranteeing assembling apparatus of the present application;

fig. 4 is a perspective view of a press-fitting mechanism according to an embodiment of the assembling apparatus for ensuring coaxiality of the present application.

FIG. 5 is a schematic diagram of a positioning workpiece structure of one embodiment of the coaxiality-guaranteeing assembling apparatus of the present application.

Reference numerals

1. A bearing table; 2. a fixing mechanism; 21. a slide rail; 22. a fixing plate; 23. an elastic component; 24. connecting blocks; 25. a first driving member; 26. a deviation rectifying block; 27. a second driving member; 3. a press-fitting mechanism; 31. a limiting block; 311. a second rotary drive assembly; 312. positioning holes; 313. a displacement sensor; 314. a position sensor; 315. a pressure sensor; 32. positioning blocks; 33. a third driving member; 34. a mounting frame; 341. a slide rail and slide block structure; 342. a displacement drive assembly; 343. a slide base; 4. a hollow rotating platform; 41. a turntable mounting rack; 42. a first rotary drive assembly; 5. positioning a workpiece; 51 locating pins.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the application. That is, in some embodiments of the present application, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indications such as up, down, left, right, front and rear … … in the embodiment of the present application are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are for descriptive purposes only, not specifically referring to the order or sequence, nor are they intended to limit the application, but merely to distinguish components or operations described in the same technical terms, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

For further understanding of the invention, its features and effects, the following examples are given in conjunction with the accompanying drawings and the following detailed description:

in the production of lithium ion batteries, after a battery core is assembled in a shell, an end cover needs to be assembled at the end part of the shell. In the end cover assembling process, the gap between the shell and the end cover needs to meet the production requirement, and then the coaxial assembly needs to be completed.

In order to solve the above technical problem, this embodiment provides an assembling apparatus for ensuring coaxiality, as shown in fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the assembling apparatus for ensuring coaxiality according to the present application; the press-fitting device is used for press-fitting two pre-assembled workpieces, and comprises a bearing table 1 for bearing a first workpiece, a fixing mechanism 2 for fixing the first workpiece on the bearing table 1, and a press-fitting mechanism 3 abutting against a second workpiece and press-fitting the first workpiece towards the first workpiece, wherein the first workpiece is taken as a battery shell, and the second workpiece is taken as an end cover in the embodiment. Fixing mechanism 2 is installed on carousel mounting bracket 41, carousel mounting bracket 41 is rotatable to be set up on cavity rotary platform 4, on pressure equipment mechanism 3, and be provided with supporting coaxial positioning mechanism on the end cover respectively, coaxial positioning mechanism and the coaxial setting in casing center on the pressure equipment mechanism 3, in the pressure equipment in-process, coaxial positioning mechanism on the pressure equipment mechanism 3 matches with the coaxial positioning mechanism on the end cover, and then realize that pressure equipment mechanism 3 is on battery housing with the coaxial pressure equipment of end cover through coaxial positioning mechanism, realize ensureing the axiality of assembling between two work pieces of battery housing and end cover, improve the assembly precision, improve the battery quality.

Specifically, in order to mount and fix the battery case, as shown in fig. 2, fig. 2 is a rear view structure diagram of an embodiment of the present application, the fixing mechanism 2 includes a slide rail 21 fixed on a turntable mounting rack 41, a fixing plate 22 slidably disposed on the slide rail 21, and an elastic component 23 for moving the fixing plate 22 toward the case, the carrier table 1 for carrying the case is disposed on the hollow rotary platform 4 in the axial direction of the hollow rotary platform 4, a first rotary driving component 42 for driving the turntable mounting rack 41 to rotate is disposed on the hollow rotary platform 4, the first rotary driving component 42 is a driving motor, a first driving component 25 is fixedly disposed on the hollow rotary platform 4 above the carrier table 1, a connecting block 24 having a T-shaped groove is further disposed on the fixing plate 22, the first driving component 25 is a telescopic cylinder, and a boss is disposed at a telescopic end of the first driving component 25, the boss is connected with the T-shaped groove of the connecting block 24, the boss and the connecting block 24 form a clamping structure, and then the fixing plate 22 is connected with the first driving piece 25 through the clamping structure.

When carousel mounting bracket 41 rotatory when rotatory, the boss of first driving piece 25 breaks away from with the T type groove of connecting block 24, and then realizes that first driving piece 25 and fixed plate 22 break away from, is provided with elastic component 23 at fixed plate 22's connection, and first driving piece 25 breaks away from the back with fixed plate 22, and fixed plate 22 keeps the state at the suppression casing under elastic component 23's elasticity effect, ensures that the position deviation can not take place at rotatory in-process casing, improves the position degree of accuracy.

Wherein, fixed establishment 2 includes two at least, sets up respectively in carousel mounting bracket 41 both sides, and then realizes the both ends of fixed casing respectively, ensures that the casing centre gripping is firm in the pressure equipment in-process.

Furthermore, after the shell is placed on the bearing table 1, the shell needs to be corrected to ensure the coaxiality of subsequent press mounting. For this purpose, on the hollow rotary platform 5, on both sides of the housing, deviation correcting blocks 26 driven by a second driving member 27 are provided, the deviation correcting blocks 26 and the fixing plate 22 constituting a deviation correcting fixing mechanism of the housing. After the shell is placed on the bearing table 1, the deviation rectifying blocks 26 are driven to move in opposite directions by the second driving pieces 27 arranged on two sides of the shell, so that the shell is rectified in the horizontal direction, and the fixing plate 22 is driven to press down the fixed shell by the first driving pieces 25.

In order to realize that the end cover is pressed on the shell of the bearing platform 1, the press-fitting mechanism 3 is arranged in the axial direction of the hollow rotating platform 5 and is located at one side close to the end part of the shell, as shown in fig. 3-4, fig. 3 is a structural schematic diagram of the press-fitting mechanism of the embodiment of the present application, fig. 4 is a three-dimensional schematic diagram of the press-fitting mechanism of the embodiment of the present application, the press-fitting mechanism 3 includes a limiting block 31 matched with the end part shape of the end cover, an installation frame 34 for bearing the limiting block 31, a sliding rail sliding block structure 341 and a sliding seat 343 arranged on the sliding rail sliding block structure 341 in a sliding manner are arranged on the installation frame 34, a displacement driving component 342 for driving the sliding seat 343 to move is arranged on the sliding seat 343, the limiting block 31 is arranged on the sliding seat 343 and is driven to move on.

Specifically, a second rotary driving assembly for driving the limiting block 31 to rotate is fixedly arranged on the sliding seat 343, wherein the second rotary driving assembly can be a driving motor, the limiting block 31 is arranged at an output end of the second rotary driving assembly, and then the limiting block 31 is driven to rotate through the second rotary driving assembly, so that the synchronous rotation with the turntable mounting frame 41 is realized, the position sensor 314 is arranged above the limiting block 31 on the sliding seat 343, and further the position state of the limiting block 31 is detected.

Move on the drive slide 343 through displacement drive assembly 342, and then realize that stopper 31 on slide 343 pushes the end cover into the casing tip and accomplishes the pressure equipment action, in order to realize real-time detection pressure equipment, it is provided with pressure sensor 315 to lie in stopper 31 side on slide 343, realize the pressure equipment pressure of real-time detection pressure equipment in-process through pressure sensor 315, when pressure equipment pressure is too big, then stop the pressure equipment, when unable pressure equipment when the end cover position deviation is big in the casing, avoid too big pressure to cause end cover or casing to take place to warp, guarantee the pressure equipment quality of battery. A groove matched with the end cover in shape is formed in the limiting block 31, the end cover is limited, and a displacement sensor 313 used for detecting whether the end cover is in place or not is arranged on the side of the limiting block 31.

In order to ensure that the limiting block 31 and the end cover have higher coaxiality during press mounting, matched coaxial positioning mechanisms are respectively arranged on the press mounting mechanism 3 and the end cover, each coaxial positioning mechanism comprises a positioning column and a positioning hole, the positioning hole 312 or the positioning column is formed on the limiting block 31, the positioning column or the positioning hole is formed on the end cover, the positioning hole or the positioning column on the press mounting mechanism 3 is coaxially arranged with the shell, the positioning hole 312 or the positioning column can be arranged on the limiting block 31, if the positioning hole 312 is arranged on the limiting block 31, the positioning column is correspondingly arranged on the other limiting block, and the positioning pins or the positioning holes arranged on the limiting block 31 and the workpiece can be matched in various ways, so that the coaxiality of the end cover and the shell is ensured, the press mounting precision of the end cover and the.

Before the end cover is pressed on the shell by the limiting block 31, the end cover is required to be limited so as to ensure the accuracy of subsequent assembly, therefore, the two sides of the end cover are provided with the positioning blocks 32 driven by the third driving piece 33, the third driving piece 33 is fixed on the hollow rotating platform 4 and positioned on the two sides of the end cover, and the positioning blocks 32 and the limiting block 31 form a limiting mechanism of the end cover.

In order to ensure that the fixing mechanism 2 for fixing the battery cell is coaxial with the press-fitting mechanism 3 for limiting the press-fitting of the end cover, after the relative position assembly of the fixing mechanism 2 and the press-fitting mechanism 3 is completed, after the battery cell and the end cover are fed at every time, the fixing mechanism 2 and the press-fitting mechanism 3 can both ensure the coaxial press-fitting of the battery cell and the end cover, and the press-fitting precision and the press-fitting effect are ensured. Based on the assembling device for ensuring the coaxiality, the application also provides an assembling method in another aspect, which comprises the following assembling steps:

a100, a positioning workpiece 5 with the end part shape matched with the limiting block 31 is processed in advance, a positioning pin 51 matched with a positioning hole 312 of the limiting block 31 is arranged on the end face of the positioning workpiece 5, and the positioning workpiece 5 is placed on the bearing table 1;

as shown in fig. 5, the positioning workpiece 5 is shown, the shape of the positioning workpiece 5 matches the shape of the battery (first workpiece), because the battery is expensive, the positioning workpiece 5 whose shape matches the battery is used as a substitute in the coaxial assembly equipment, the positioning pin 51 matching the positioning hole 312 of the stopper 31 is provided on the end face of the positioning workpiece 5, and a chamfer is formed at the opening of the positioning hole 312, so that the positioning pin 51 for positioning the workpiece 5 can be inserted into the positioning hole 312. The limiting block 31 may be a positioning hole 312 or a positioning column, if the limiting block 31 is provided with the positioning hole 312, the positioning pin 51 is correspondingly arranged on the end surface of the positioning workpiece 5, if the limiting block 31 is provided with the positioning column, the positioning hole is correspondingly arranged on the end surface of the positioning workpiece 5, and the positioning pin and the positioning hole may be matched in multiple ways.

A200, firstly, fixing a fixing mechanism 2, starting the fixing mechanism 2 to finish deviation rectifying action on a positioning workpiece 5 on a bearing table 1, and pressing down and fixing the positioning workpiece 5 by the fixing mechanism 2;

firstly, the fixing mechanism 2 is fixedly installed on the turntable installation frame 41 of the hollow rotating platform 4, then the second driving piece 27 of the fixing mechanism 2 is started, the second driving piece 27 drives the deviation rectifying block 26 to move towards the positioning workpiece 5, and further the deviation rectifying is carried out on the positioning workpiece 5, the first driving piece 25 is started after the deviation rectifying action is completed, and then the fixing plate 22 is driven to be pressed downwards to fix the positioning workpiece 5.

A300, matching a positioning hole 312 of an upper limiting block 31 of the press-fitting mechanism 3 with a positioning pin 51 at the end part of a positioning workpiece 5 to realize coaxial press-fitting of the limiting block 31 and the positioning workpiece 5;

after the positioning workpiece 5 is corrected, the positioning hole 312 of the upper limiting block 31 of the press-fitting mechanism 3 is matched with the positioning pin 51 at the end of the positioning workpiece 5, the positioning pin 51 and the positioning hole 312 enable the limiting block 31 to be coaxial with the positioning workpiece 5, and the limiting block 31 on the driving slide seat 343 is driven by the displacement driving cylinder 342 to be coaxially press-fitted with the positioning workpiece 5.

A400, fixedly mounting the press-mounting mechanism 3, so that the second workpiece limited by the limiting block 31 and the first workpiece fixed by the fixing mechanism 2 are always coaxial;

stopper

31 and 5 coaxial pressure equipments backs of locating workpiece, again with 3 fixed mounting of pressure equipment mechanism, and then the relative position of pressure equipment mechanism 3 and fixed establishment 2 is fixed, make by stopper 31 spacing second work piece and the fixed first work piece of fixed establishment 2 coaxial all the time, after battery and end cover material loading at every turn, fixed establishment 2 and pressure equipment mechanism 3 can both guarantee the coaxial pressure equipment of battery and end cover, guarantee pressure equipment precision and pressure equipment effect, need not to adjust the axiality at every turn, improve production efficiency.

b100, a positioning workpiece 5 with the end part shape matched with the limiting block 31 is processed in advance, a positioning hole or a positioning pin matched with a positioning column or a positioning hole of the limiting block 31 is arranged on the end face of the positioning workpiece 5, and the positioning workpiece 5 is placed on the bearing table 1;

b200, fixedly mounting the press-mounting mechanism 3, so that a positioning column or a positioning hole of a limiting block 31 on the press-mounting mechanism 3 is matched and positioned with a positioning hole or a positioning pin on a positioning workpiece 5, and realizing coaxial press-mounting of the limiting block 31 and the positioning workpiece 5;

b300, fixedly installing the fixing mechanism 2, and starting the fixing mechanism 2 to press and fix the positioning workpiece 5 on the bearing table 1; so that the positioning workpiece 5 limited by the limiting block 31 is coaxial with the positioning workpiece 5 fixed by the fixing mechanism 2.

Wherein, the fixed mounting order of the press-fitting mechanism 3 and the fixing mechanism 2 in the steps B200-B300 is opposite to the mounting order of the steps A200-A300, the second mounting method is that the press-fitting mechanism 3 is fixedly mounted firstly, the positioning hole 312 of the limiting block 31 on the press-fitting mechanism 3 is matched with the positioning pin 51 at the end part of the positioning workpiece 5, the positioning pin 51 and the positioning hole 312 are used for realizing the consistent coaxiality of the limiting block 31 and the positioning workpiece 5, then the fixing mechanism 2 is fixedly mounted on the turntable mounting rack 41, and further the relative positions of the press-fitting mechanism 3 and the fixing mechanism 2 are fixed, so that the second workpiece limited by the limiting block 31 and the first workpiece fixed by the fixing mechanism 2 are consistent.

In practical production, after the press-fitting step is completed in a500, the end caps and the top and bottom surfaces of the housing need to be welded, for this reason, after the top surface is welded, the end caps and the housing need to be simultaneously rotated and the bottom surface is welded, and for this reason, the embodiment also provides a coaxial rotation method, which includes the following steps:

c100, starting the second driving piece 27 to drive the deviation rectifying block 26, and enabling the deviation rectifying block 26 to move and be separated from the first workpiece; starting the third driving element 33 to drive the positioning block 32, and moving the positioning block 32 to be separated from the second workpiece;

the second driving member 27 is started to drive the deviation rectifying block 26 to be away from the shell, so that the deviation rectifying block 26 is separated from the shell, meanwhile, the third driving member 33 is started to drive the positioning block 32 to be away, and the positioning block 32 is separated from the end cover.

C200, starting the hollow rotating platform 4, and rotating the turntable mounting rack 41; meanwhile, the press-fitting mechanism 3 is started to drive the limiting block 31 to rotate synchronously with the first workpiece;

through the first rotary driving assembly 42 that starts cavity rotary platform 4, first rotary driving assembly 42 drives carousel mounting bracket 41 rotatory, drives the casing rotation on the carousel mounting bracket 41, and meanwhile, starts the second rotary driving assembly 311 of pressure equipment mechanism 3, and second rotary driving assembly 311 drives stopper 31 synchronous revolution, and then realizes casing and end cover synchronous revolution.

C300, the first driving piece 25 of the fixing plate 22 is separated from the T-shaped groove of the connecting block 24, and the fixing plate 22 is kept in a state of pressing a first workpiece under the action of the elastic force of the elastic assembly 23;

the fixing plate 22 is driven to rotate when the turntable mounting frame 41 rotates, the boss of the first driving piece 25 is separated from the T-shaped groove of the connecting block 24 at the moment, the fixing plate 22 is separated from the first driving piece 25 when rotating, the fixing plate 22 is kept in a state of pressing down the shell under the elastic action of the elastic component 23, the position of the shell cannot deviate in the rotating process, and the shell and the end cover can rotate coaxially.

C400, after the turntable mounting frame 41 finishes rotating, the connecting block returns to the initial position, and at the moment, the first driving piece 25 of the fixing plate 22 is embedded with the T-shaped groove of the connecting block 24;

after the processing of the housing and the end cap is completed, the turntable mounting bracket 41 rotates back to the initial position, and at this time, the T-shaped groove of the connecting block 24 on the fixing plate 22 is embedded with the boss of the first driving member 25, so that the fixing plate 22 is connected with the first driving member 25 again.

And B500, starting the first driving piece 25 to drive the fixing plate 22, separating the fixing plate 22 from the first workpiece, and unloading the first workpiece after machining.

The first driving member 25 drives the fixing plate 22 to be separated from the housing, and the finished housing is discharged.

In summary, in one or more embodiments of the present application, a loading platform for loading a battery casing, a fixing mechanism for fixing the battery casing on the loading platform, and a press-fitting mechanism pressed against an end cap toward the casing are provided, the fixing mechanism is mounted on a turntable mounting rack, the turntable mounting rack is rotatably disposed on a hollow rotating platform, the press-fitting mechanism and the end cap are respectively provided with a coaxial positioning mechanism, the coaxial positioning mechanism on the press-fitting mechanism is coaxially disposed with a center of the casing, during the press-fitting process, the coaxial positioning mechanism on the press-fitting mechanism is matched with the coaxial positioning mechanism on the end cap, so as to press-fit the end cap onto the battery casing coaxially through the coaxial positioning mechanism, the press-fitting mechanism and the fixing mechanism are mounted by an assembly method, so that the fixing mechanism and the press-fitting mechanism can both ensure coaxial press-fitting of the battery and the end cap, the press fitting precision and the press fitting effect are guaranteed, the coaxiality does not need to be adjusted at every time, the production efficiency is improved, the coaxiality of assembly between the battery shell and the two workpieces of the end cover is guaranteed, the assembly precision is improved, and the battery quality is improved.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. An assembling apparatus for ensuring coaxiality, characterized in that: the press fitting device is used for press fitting two workpieces which are pre-assembled; the device comprises a bearing table (1) for bearing a first workpiece, a fixing mechanism (2) for fixing the first workpiece on the bearing table (1), and a press-fitting mechanism (3) which is abutted against the second workpiece and presses the second workpiece towards the first workpiece; matched coaxial positioning mechanisms are respectively arranged on the press-mounting mechanism (3) and the second workpiece; and the coaxial positioning mechanism on the press-fitting mechanism (3) is coaxially arranged with the first workpiece.

2. The coaxiality-guaranteeing assembling apparatus according to claim 1, wherein: the coaxial positioning mechanism comprises a positioning column and a positioning hole; and the positioning column or the positioning hole on the press-mounting mechanism (3) is coaxial with the first workpiece.

3. The coaxiality-guaranteeing assembling apparatus according to claim 2, wherein: a limiting block (31) matched with the end part shape of the second workpiece is arranged on the press-mounting mechanism (3); the positioning column or the positioning hole is formed on the limiting block (31), and the positioning hole or the positioning column is formed on the second workpiece.

4. The coaxiality-guaranteeing assembling apparatus according to claim 1, wherein: the rotary table further comprises a hollow rotary platform (4) and a turntable mounting rack (41); the fixing mechanism (2) is arranged on the turntable mounting frame (41).

5. The coaxiality-guaranteeing assembling apparatus according to claim 4, wherein: the fixing mechanism (2) comprises a slide rail (21) fixed on the turntable mounting rack, a fixing plate (22) arranged on the slide rail (21) in a sliding manner, and an elastic assembly (23) enabling the fixing plate (22) to move towards a first workpiece; a connecting block (24) with a T-shaped groove is also arranged on the fixing plate (22); the first driving piece (25) of the fixing plate (22) is fixed on the turntable mounting frame (41), and a boss arranged at the end part of the fixing plate is connected with the connecting block (24) and drives the fixing plate (22).

6. The coaxiality-guaranteeing assembling apparatus according to claim 1, wherein: the fixing mechanisms (2) at least comprise two fixing mechanisms which are respectively used for fixing two ends of the first workpiece.

7. The coaxiality-guaranteeing assembling apparatus according to claim 3, wherein: positioning blocks (32) driven by a third driving piece (33) are arranged on two sides of the second workpiece; the positioning block (32) and the limiting block (31) form a limiting mechanism of the second workpiece.

8. The coaxiality-guaranteeing assembling apparatus according to claim 5, wherein: deviation rectifying blocks (26) driven by a second driving piece (27) are arranged on the hollow rotary platform (5) and on two sides of the first workpiece; the deviation rectifying block (26) and the fixing plate (22) form a deviation rectifying and fixing mechanism of the first workpiece.

9. A method of assembly, characterized by: the assembly apparatus for ensuring coaxiality according to any one of claims 3 to 8, comprising the following assembly steps:

a100, a positioning workpiece (5) with the end part shape matched with that of the limiting block (31) is pre-processed, a positioning hole or a positioning pin matched with a positioning column or a positioning hole of the limiting block (31) is arranged on the end face of the positioning workpiece (5), and the positioning workpiece (5) is placed on the bearing table (1);

a200, firstly, a fixing mechanism (2) is fixedly installed, the fixing mechanism (2) is started to finish deviation rectifying action on a positioning workpiece (5) on a bearing table (1), and the fixing mechanism (2) fixes the positioning workpiece (5);

a300, matching a positioning column or a positioning hole of a positioning block (31) on the press-fitting mechanism (3) with a positioning hole or a positioning pin of a positioning workpiece (5) to realize coaxial press-fitting of the positioning block (31) and the positioning workpiece (5);

and A400, fixedly installing the press-fitting mechanism (3) to enable the second workpiece limited by the limiting block (31) to be always coaxial with the first workpiece fixed by the fixing mechanism (2).

10. A method of assembly, characterized by: the assembly apparatus for ensuring coaxiality according to any one of claims 3 to 8, comprising the following assembly steps:

b100, a positioning workpiece (5) with the end part shape matched with the limiting block (31) is processed in advance, a positioning hole or a positioning pin matched with a positioning column or a positioning hole of the limiting block (31) is arranged on the end face of the positioning workpiece (5), and the positioning workpiece (5) is placed on the bearing table (1);

b200, fixedly mounting the press-mounting mechanism (3) to enable a positioning column or a positioning hole of a limiting block (31) on the press-mounting mechanism (3) to be matched and positioned with a positioning hole or a positioning pin on a positioning workpiece (5), so that the limiting block (31) and the positioning workpiece (5) are coaxially pressed and mounted;

b300, fixedly installing the fixing mechanism (2), and starting the fixing mechanism (2) to fix the positioning workpiece (5) on the bearing table (1); so that the positioning workpiece (5) limited by the limiting block (31) is coaxial with the positioning workpiece (5) fixed by the fixing mechanism (2).