Necking die device of cylindrical battery steel shell

Abstract

The utility model discloses a necking die device for a cylindrical battery steel shell, which comprises a die upper part and a die lower part, and the die upper part comprises a necking die, a necking clamp, a necking clamp fixing seat, a rear fixing seat and a movable inclined block; the lower part of the die comprises a bottom plate and a necking clamp pull rod, and the limiting sleeve, the guide sleeve, the limiting sleeve, the necking clamp fixing seat and the rear fixing seat are sequentially fixed above the bottom plate; the guide sleeve is embedded into the limiting sleeve, the necking die is arranged in the necking clamp, and the necking clamp is located in the necking clamp fixing seat; a hole-shaped structure for the necking clamp pull rod and the movable inclined block to move is arranged in the rear fixing seat; a gradually-changing tightening groove is formed in the necking clamp fixing base, the necking clamp is located in the groove, the rear end of the necking clamp is connected with the necking clamp pull rod, a wedge-shaped groove is formed in the rear end of the necking clamp pull rod, the lower portion of the movable inclined block is of a wedge-shaped structure, and the wedge-shaped structure is matched with the wedge-shaped groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery shell processing technical field especially relates to a necking die device of cylindrical battery steel shell. BACKGROUND

[0002] With the rapid development of lithium ion battery industry in our country, the market quality requirement of lithium battery steel shell pipe fitting is higher and higher, thereby promoting the rapid development of steel shell processing die, and the necking of steel shell is the key link in the production process of cylindrical lithium battery, aims at ensuring the stability and safety of battery structure through accurate mechanical operation. The necking process of lithium battery mainly relates to the necking treatment of steel shell, and this step is very crucial in the assembly line of lithium battery, especially in the production of high capacity and large size cylindrical battery.

[0003] The existing necking processing mode of stainless steel pipe fitting has shaft pressure integral die necking, split die necking and spinning necking, the shaft pressure integral die necking has the characteristics of high production efficiency and simple die structure, therefore is widely used in the necking forming process of stainless steel pipe fitting. The shaft pressure integral necking die is influenced by the size of die half-cone angle, the one-time necking deformation degree of conical concave die and the material of stainless steel pipe fitting, when necking operation is carried out, the wrinkled phenomenon is prone to appear at the necking part due to deformation instability, therefore multiple necking processing is needed, the manufacturing cost of die is increased, and repeated clamping is carried out, so the efficiency is low and the product precision is influenced. In general, the necking process of lithium battery plays an important role in the production of cylindrical battery, realizes the efficient and accurate production target through advanced equipment and technical means, which not only improves the product quality and safety, but also brings higher economic benefits and market competitiveness to enterprises.

[0004] In order to solve the above problems, the utility model provides a necking die device of cylindrical battery steel shell. Utility model content

[0005] The utility model relates to a necking die device of cylindrical battery steel shell.

[0006] The utility model can realize the purpose through the following technical scheme:

[0007] The necking die device of the cylindrical battery steel shell comprises a die upper part and a die lower part, the die upper part comprises a necking die, a necking clamp, a necking clamp fixing seat, a rear fixing seat and a movable inclined block, the die lower part comprises a bottom plate, a necking clamp pull rod, a limiting sleeve and a guide sleeve, the limiting sleeve, the necking clamp fixing seat and the rear fixing seat are fixed above the bottom plate in sequence, the guide sleeve is embedded in the limiting sleeve, the necking die is arranged in the necking clamp, and the necking clamp is arranged in the necking clamp fixing seat, the rear fixing seat is provided with a hole structure for movement of the necking clamp pull rod and the movable inclined block, the necking clamp fixing seat is provided with a gradually-changing and tightened groove, the necking clamp is arranged in the groove, the rear end of the necking clamp is connected with the necking clamp pull rod, the rear end of the necking clamp pull rod is provided with a wedge-shaped groove, and the lower part of the movable inclined block is in a wedge-shaped structure and matched with the wedge-shaped groove.

[0008] Further, the necking clamp is provided with a three-petal structure.

[0009] Preferably, the die lower part further comprises a limiting gasket, and the limiting gasket is arranged in the necking clamp and on the inner side of the necking die.

[0010] Further, the die upper part further comprises a reset rubber pad and a limiting sheet, the reset rubber pad is sleeved outside the movable inclined block, and the limiting sheet is fixed to the top end of the movable inclined block.

[0011] Preferably, the die upper part further comprises a necking clamp limiting pin, the necking clamp limiting pin is arranged in the necking clamp fixing seat, and correspondingly, the necking clamp pull rod and the necking clamp are also provided with a through hole structure.

[0012] Further, the die lower part further comprises a steel shell fixing frame, and the steel shell fixing frame is arranged in front of the limiting sleeve.

[0013] Beneficial technical effects:

[0014] The necking die device of the cylindrical battery steel shell has the advantages of simple overall structure, convenient use, solution to the wrinkling phenomenon caused by necking deformation instability, high production efficiency, convenience in use, effective improvement of the precision of the machining size, convenience in replacement of the necking clamp, compatibility with multiple models, high machining efficiency, high precision, strong durability, convenience in operation, wide application range and the like. BRIEF DESCRIPTION OF DRAWINGS

[0015] The necking die device of the cylindrical battery steel shell will be further described below with reference to the drawings.

[0016] Fig. 1 The necking die device of the cylindrical battery steel shell is an explosion view.

[0017] Fig. 2 The necking die device of the cylindrical battery steel shell is a sectional view. The necking die device of the cylindrical battery steel shell has the advantages of simple overall structure, convenient use, solution to the wrinkling phenomenon caused by necking deformation instability, high production efficiency, convenience in use, effective improvement of the precision of the machining size, convenience in replacement of the necking clamp, compatibility with multiple models, high machining efficiency, high precision, strong durability, convenience in operation, wide application range and the like.

[0018] In the figure, 1, steel shell; 2, necking die; 3, necking clamp; 4, necking clamp fixing seat; 5, limiting sleeve; 6, necking clamp limiting pin; 7, limiting gasket; 8, necking clamp pull rod; 9, movable inclined block; 10, reset rubber pad; 11, steel shell fixing frame; 12, bottom plate; 13, guide sleeve; 14, rear fixing seat; 15, limiting sheet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Referring to Figs. 1-2 As shown in the figure, a necking die device of cylindrical battery steel shell, including die upper part and die lower part, die upper part including necking die 2, necking clamp 3, necking clamp fixing seat 4, rear fixing seat 14, movable inclined block 9;Die lower part including bottom plate 12 and necking clamp pull rod 8, limiting sleeve 5, guide sleeve 13 and steel shell fixing frame 11, steel shell fixing frame 11, limiting sleeve 5, necking clamp fixing seat 4, rear fixing seat 14 are fixed in turn above the bottom plate 12;Guide sleeve 13 is embedded in limiting sleeve 5, necking die 2 is placed in necking clamp 3, necking clamp 3 is located in necking clamp fixing seat 4, necking clamp 3 shrinks and tightens necking die 2 and then plays the role of necking to the steel shell 1 placed in necking die 2;Rear fixing seat 14 is provided with hole structure for necking clamp pull rod 8 and movable inclined block 9 to move.Necking clamp fixing seat 4 is provided with gradually changing tightening groove, necking clamp 3 is located in the groove, the rear end of necking clamp 3 is connected with necking clamp pull rod 8, the rear end of necking clamp pull rod 8 is provided with wedge-shaped groove, the lower part of movable inclined block 9 is wedge-shaped structure, the wedge-shaped structure is matched with wedge-shaped groove, movable inclined block 9 moves downward to drive necking clamp pull rod 8 to move backward, thereby driving necking clamp 3 and necking clamp fixing seat 4 groove to move, gradually changing tightening groove extrudes necking clamp 3 to cause the effect of necking die 2 tightness, thereby necking operation is carried out to steel shell 1.

[0021] Necking clamp 3 is provided with three petal structures, three petals shrink inward to drive necking die 2 to tighten, thereby playing the role of necking to steel shell 1.

[0022] Die lower part further includes limiting gasket 7, limiting gasket 7 is located in necking clamp 3, the inner side of necking die 2, limiting gasket 7 is used to prevent steel shell 1 from moving excessively, and plays the role of limiting the relative position of steel shell 1.

[0023] The upper part of the mold further comprises a reset rubber pad 10 and a limiting sheet 15, the reset rubber pad 10 is sleeved outside the movable inclined block 9, and the limiting sheet 15 is fixed to the top end of the movable inclined block 9, so that the reset rubber pad 10 can provide a reset force for the upward movement of the movable inclined block 9.

[0024] The upper part of the mold further comprises a necking clamp limiting pin 6, the necking clamp limiting pin 6 is installed in the necking clamp fixed seat 4, correspondingly, the necking clamp pull rod 8 and the necking clamp 3 are also provided with a through hole structure, and the necking clamp limiting pin 6 plays a role in fixing the necking clamp pull rod 8, the necking clamp 3 and the necking clamp fixed seat 4.

[0025] The limiting sleeve 5 is located in front of the necking clamp fixed seat 4, and is used for limiting the transverse movement of the necking die 2 and the necking clamp 3 in the necking clamp fixed seat 4.

[0026] The lower part of the mold further comprises a steel shell fixing frame 11, the steel shell fixing frame 11 is located in front of the limiting sleeve 5, in use, the steel shell 1 is placed above the steel shell fixing frame 11, a notch matched with the steel shell 1 is arranged above the steel shell fixing frame 11, and the steel shell fixing frame 11 provides support for the steel shell 1 to be processed.

[0027] The installation method is as follows: the steel shell fixing frame 11 is installed on the bottom plate 12, the guide sleeve 13 is embedded and installed into the limiting sleeve 5, the necking die 2 is installed into the necking clamp 3, then the necking clamp 3 is installed into the necking clamp fixed seat 4, the necking clamp limiting pin 6 is installed into the necking clamp fixed seat 4, the necking clamp pull rod 8 is installed in the necking clamp fixed seat 4 and the rear fixed seat 14, and the movable inclined block 9 and the reset rubber pad 10 are installed on the rear fixed seat 14.

[0028] The necking die 2 plays a role in reducing the positive port of the steel shell 1.

[0029] The necking clamp 3 plays a role in fixing the steel shell 1 and providing a compression force for the necking die 2.

[0030] The necking clamp fixed seat 4 plays a role in fixing the necking clamp 3.

[0031] The limiting sleeve 5 plays a role in positioning the steel shell 1 as a whole.

[0032] The movable inclined block 9 is used for driving the necking clamp pull rod 8 to shrink.

[0033] The reset pad 10 is of an elastic structure and is made of an elastic material, and plays a role in resetting the movable inclined block 9.

[0034] The steel shell fixing frame 11 plays a role in supporting and stabilizing the steel shell 1. The bottom plate 12 is used for fixing the whole mold.

[0035] The guide sleeve 13 is used for reducing the friction and wear of the steel shell 1 and improving the precision and stability.

[0036] The working steps of the necking die device include fixing the die, placing the material, starting the machine, necking, completing homing, etc. The following is a specific introduction to these steps:

[0037] Fixing the die: fix the necking die device on the machine table to ensure that the necking die device is stable and does not move.

[0038] Place the steel shell 1: place the steel shell 1 that needs to be necked into the guide sleeve 13 of the necking die device to ensure correct placement and positioning of the positive end.

[0039] Start the machine: start the external device, provide power source through the external device to meet the necking device operation, and push the movable inclined block 9 to move downward.

[0040] Necking: the movable inclined block 9 moves downward, drives the three petals of the necking clamp 3 to move inward, and drives the petal movement to neck the steel shell 1.

[0041] Complete processing: after the necking movement is completed, each part returns to the original position, the movement is completed, and the above actions are repeated to realize the necking operation of the steel shell. In general, these steps together constitute the working process of the necking die, which ensures that the steel shell can be accurately necked.

[0042] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. The skilled person should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by the skilled person.

Claims

1. A die-cutting device for a cylindrical battery steel casing, characterized in that, The mold comprises an upper part and a lower part. The upper part includes a shrunk die, a shrunk clamp, a shrunk clamp fixing seat, a rear fixing seat, and a movable inclined block. The lower part includes a base plate, a shrunk clamp pull rod, a limiting sleeve, and a guide sleeve. The limiting sleeve, the shrunk clamp fixing seat, and the rear fixing seat are sequentially fixed above the base plate. The guide sleeve is embedded in the limiting sleeve, the shrunk die is placed in the shrunk clamp, and the shrunk clamp is located in the shrunk clamp fixing seat. The rear fixing seat has a hole-like structure for the shrunk clamp pull rod and the movable inclined block to move. The shrunk clamp fixing seat has a gradually tightening groove, the shrunk clamp is located in the groove, the rear end of the shrunk clamp is connected to the shrunk clamp pull rod, the rear end of the shrunk clamp pull rod has a wedge-shaped groove, and the lower part of the movable inclined block has a wedge-shaped structure that matches the wedge-shaped groove.

2. The necking mold device for a cylindrical battery steel casing according to claim 1, characterized in that, The clamp has a three-petal structure.

3. The necking mold device for a cylindrical battery steel casing according to claim 1, characterized in that, The lower part of the mold also includes a limiting shim, which is located in the shrinking clamp and inside the shrinking mold.

4. The necking mold device for a cylindrical battery steel casing according to claim 1, characterized in that, The upper part of the mold also includes a reset pad and a limiting piece. The reset pad is sleeved on the outside of the movable inclined block, and the limiting piece is fixed to the top of the movable inclined block.

5. The necking mold device for a cylindrical battery steel casing according to claim 1, characterized in that, The upper part of the mold also includes a necking clamp limiting pin, which is installed in the necking fixing seat. Correspondingly, the necking clamp pull rod and the necking clamp are also provided with through hole structures.

6. The necking mold device for a cylindrical battery steel casing according to claim 1, characterized in that, The lower part of the mold also includes a steel shell fixing frame, which is located in front of the limiting sleeve.

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