CN110918756A

CN110918756A - Multi-die multi-discharge blanking punching cup design of cylindrical battery steel shell on single-action punching machine

Info

Publication number: CN110918756A
Application number: CN201910627420.5A
Authority: CN
Inventors: 李可
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-03-27

Abstract

The invention relates to the technical field of punching production of a battery steel shell, and discloses a design of a multi-die multi-discharge blanking punching cup of a cylindrical battery steel shell on a single-action punch press, wherein a plurality of sets of blanking punching cup dies are designed on a set of die carriers, and are arranged in a single row, double rows or even multiple rows and are arranged on a single-action punch press to realize the multi-die multi-discharge blanking punching cup, theoretically, the width of a steel belt can be widened to the maximum extent according to the effective working length of the punch press, so that the layout of blanking punching cup process dies is designed, the utilization rate of AA example materials is improved by 6 percent, the layout of 11+10 double rows of 21 cutting blanking punching cups is designed, 21 punching cups are produced by one-time punching, the integral production efficiency can reach 90 percent, efficient centralized cup supply is realized, in addition, the accelerated running of punching cup male dies at the speed of 2-4 times of sliding blocks of the punch press is realized on the single, the speed of the punch can be increased by 50-75%.

Description

Multi-die multi-discharge blanking punching cup design of cylindrical battery steel shell on single-action punching machine

Technical Field

The invention relates to the technical field of battery steel shell punching, in particular to a multi-die multi-discharge blanking punching cup design of a cylindrical battery steel shell on a single-action punch.

Background

With the increasing of industry competition and labor cost, the rapid development of industrial automation is promoted, for the stamping production of the cylindrical battery steel shell, the single automatic stamping of a single compound die is adopted in the current general production mode, namely, each punch is provided with a set of blanking stamping cup and a set of stretching forming compound die and a set of feeding system, and the automatic feeding of 2-cutting (less 3-cutting) width steel bands can be generally realized.

The technical problems encountered in the production by the mode are that because the blanking punching cup and the stretch forming compound die are adopted and are arranged on the same punching machine, due to the size of a working table of the punching machine which is relatively fixed, steel strip materials with more cutting numbers and wider width can not be used for feeding, so that the material utilization rate can not be increased, and because the working position is limited, only one set of compound die can be arranged on a single punching machine, only one blanking punching cup can be realized by one-time punching, one product can be produced, and the production efficiency is limited.

Disclosure of Invention

Aiming at the problems, the invention provides a blanking punching cup design for multi-die and multi-discharge of a cylindrical battery steel shell on a single-action punch.

The adopted technical scheme is as follows: the existing compound die is separated from the stretch forming station part, a plurality of sets of blanking cup punching dies are designed on one set of die carrier, and are arranged on a single-row, double-row or even multi-row punching machine, so that multi-die multi-discharge blanking cup punching is realized.

The beneficial effects achieved are:

1) the material utilization rate is improved to the maximum extent: theoretically, the blanking cup punching process die layout can be designed according to the effective working length of the punch press and the width of the steel strip can be widened to the maximum extent, for example, a certain AA battery steel shell is used, the blanking diameter is 44.2mm, the width of the cold-rolled steel strip is 950mm, the 11+10 double-row 21-cutting blanking cup punching process die layout (figure 1) is realized, and compared with the current 2-cutting process, the material utilization rate is improved by about 6%.

2) Ultra-high efficiency blanking cup punching of a single-action punch: on a single-action punching machine, taking an AA battery steel shell as an example, 21 punching cups with the width of a cold-rolled steel strip of 950mm and the layout of 11+10 double rows of 21 cutting blanks are used for producing 21 punching cups by one-step punching, the integral production efficiency can reach 90 percent, and efficient centralized cup supply is realized.

3) The speed of the punch can be improved by 50-75%: through the design of other hydraulic pressure or lever principle, the cup punching male die can operate at the accelerated action of 2-4 times of the speed of the punch slide block on the single-action punch, so that the stroke of the punch required for punching the cup is 1/2-1/4 (50-25%), in other words, the design of the punch stroke can be reduced by 50-75%, the time required by one punching cycle of the theoretical upper punch can be reduced by 50-75%, and the speed of the punch can be increased by 50-75%.

Drawings

FIG. 1: an '11 + 10' double-row (21-set) blanking cup punching stamping process die layout is characterized in that a certain AA blanking diameter 44.2mm is taken as an example, the width of a cold-rolled steel strip is 950mm, and a '11 + 10' double-row, 21-set blanking cup punching die structural unit die is arranged on the same die set.

FIG. 2: the upward blanking and cup punching die of the single-action punch press is combined into a graph unit:

the upper die part comprises the following main components: a blanking male die/cup punching female die, a blanking male die fixing plate and a discharging plate;

the main components of the lower die part are as follows: the blanking die, blanking die fixing plate, cup punching male die extension bar, cup punching male die fixing plate, floating blank holder and annular cylinder.

FIG. 3: the blanking cup punching die of the single-action punch press is combined into a figure-upward cup punching lever principle.

FIG. 4: the blanking cup punching die of the single-action punch press is combined into a figure-upward cup punching hydraulic principle.

FIG. 5: the downward blanking and cup punching die of the single-action punch press is combined into a graph unit:

the upper die part comprises the following main components: the blanking die, the blanking die fixing plate, the cup punching male die extension bar, the cup punching male die fixing plate, the floating blank holder and the annular cylinder;

the main components of the lower die part are as follows: a blanking male die/cup punching female die, a blanking male die fixing plate and a discharging plate.

FIG. 6: the blanking cup punching die of the single-action punch press is combined into a figure-downward cup punching lever principle.

FIG. 7: the blanking cup punching die of the single-action punch press is combined into a figure-downward cup punching hydraulic principle.

Detailed Description

The following is a further description of the technical solution by using an AA battery steel case "11 + 10" double row 21 cutting blanking cup example and the accompanying drawings, and the specific embodiment described herein is merely for explaining the present invention and is not intended to limit the scope of the application, and similar implementations may be applied to other more models such as cylindrical battery steel cases, e.g., AAA, 18650, 21700, 22500, 26650, 32650, etc.

Fig. 3 and 4, two principles and technical solutions for punching a cup upwards on a single-action punching machine are illustrated in pages 2-3 of the specification of chinese patent application nos. 2019105289839 and 201920918913X, and the following are cited:

5) domestic single action double crankshaft press:

the tonnage suggests more than 120 tons, the size of the table surface is not less than 1600 x 350, the upper die frame and the die part are fixed on the slide block and are responsible for blanking and punching, the lower die frame and the die part are fixed on the working table surface of the punch press, because the single-action punch press does not have the characteristic of a double-action cam press (the cam design of the single-action punch press ensures that the outer slide block can stay for a period of time at the bottom dead center after driving the blanking convex die to blank, and the inner slide block can drive the stretching convex die to complete the cup punching in the period of time, aiming at the single-action punch press, the stretching convex die and the fixed plate are arranged below and can slide up and down relative to the lower die frame, when the punch press slide block drives the upper die frame to descend by 7mm away from the bottom dead center, the blanking convex die (also a stretching concave die) finishes blanking, and at the moment, the movable, at this moment, the drawing male die and the fixing plate are pushed by a mechanical or hydraulic device designed additionally, the material sheet is pushed upwards at a speed 4 times that of the movement of the slide block of the punch press, the material sheet starts to enter the drawing female die, the punch press drives the drawing female die to continue descending for 7mm, and when a bottom dead point is reached, the distance from the drawing male die to the drawing female die is as follows: 7+4 x 7-35 mm, realizing an upward cup-punching.

The mechanical device designed additionally is mounted at the reserved vacant positions at the two ends of the workbench surface, the principle is that the lever long and short arms are used for amplifying displacement in a direct proportion mode, when the punch press sliding block moves downwards to the bottom dead center by 7mm, the lever short arm ends at the two sides begin to be pressed, and the short arm length is 1/4 of the long arm, so that the long arm end can realize that the displacement is 4 times of the displacement of the short arm end, namely 4 times of the 7mm when the punch press sliding block continues to move downwards, and the stretching male die and the fixing plate are pushed to punch the cup upwards.

The hydraulic device is: the hydraulic punching machine is characterized in that vacant positions are reserved at two ends of a workbench surface and installed, the principle is that the movement displacement of small pistons with unchanged hydraulic oil volumes is inversely proportional to the area of the small pistons, when a punch slide block descends to a bottom dead center by 7mm, the left and right large cylinder pistons are pressed by the punch slide block when blanking is completed, the diameter of each piston is 120mm, hydraulic oil is pushed out to enter 6 small cylinders through hydraulic pipelines, the diameter of each piston is 34.65mm, the pistons of the small cylinders are quickly pushed out due to the entering of the hydraulic oil, the pistons quickly move upwards at 4 times of the speed of the punch, and then the stretching male die and the fixing plate are quickly pushed.

(the above is cited content)

In the two examples of the structure of the upward cup punching on the single-action punching machine shown in fig. 3 and 4, if a lever in fig. 3 or the hydraulic design in fig. 4 is cancelled, the upward cup punching can be realized, similarly, when the distance is 7mm from the bottom dead center, the blanking male die (and the blanking female die) enters the blanking female die to complete blanking, then the blanking male die (and the blanking female die) continues to descend by 7mm to the bottom dead center, because the lever or the hydraulic pressure does not push the rapid upward action of the blanking male die, the blanking male die is kept in a stationary state relative to the blanking female die, the blanking male die is driven by a punch slide block directly, the distance of the blanking male die entering the blanking female die is also 7mm, and if the distance is 35mm, the blanking male die (and the drawing female die) is required to complete when the distance is 35mm from the bottom dead center, and the downward movement is continued to the bottom dead.

Fig. 6 and 7 illustrate two principles and technical solutions for punching a cup downwards on a single-action punch, as follows:

FIG. 2: the upward blanking and cup punching die structure drawing unit of the single-action punch rotates 180 degrees, and the upper die and the lower die are switched to be in the positions shown in figure 5: the single-action punch presses downwards to discharge materials and punch a cup die to form a picture unit. The 21 sets of structural units shown in fig. 5 are arranged according to fig. 1 to form a die layout diagram of a '11 + 10' double-row (21 sets) blanking cup punching process, namely, a whole set of downward blanking cup punching die, and it is worth noting that although more blanking cup punching structural units, more rows and wider steel strips theoretically have higher material utilization rate and higher production efficiency, in actual application, the tonnage of a punch press and the length and width of a workbench surface are considered, the maximum width of a cold-rolled steel strip can be utilized, and the blanking diameter of a battery steel shell is theoretically higher.

The tonnage of the single-action punch press is generally recommended to be more than 100 tons, the size of a table top is not less than 1600 x 350, the design of double-row multi-set blanking punching cups is generally considered, an upper die frame and a die part are fixed on a sliding block and are responsible for downward blanking and punching cups, and a lower die frame and a die part are fixed on the working table top of the punch press. The cup punching male die and the fixing plate are arranged on the upper die frame plate and can slide up and down relative to the upper die frame plate. For example, when punch press slider is 7mm apart from the bottom dead center, blanking die and blanking terrace die are closed, accomplish the blanking, activity blank holder this moment is always under the effect of cylinder relatively fixed force, the tablet that cuts down compresses tightly on punching cup die (also be the blanking terrace die), and simultaneously, punching cup terrace die and fixed plate promote down at the machinery or the hydraulic means of design in addition, with 2 ~ 4 times punch press slider speed, promote the tablet fast downwards, get into and dash the cup die, accomplish the 7mm stroke at the punch press slider, when reacing the bottom dead center, the degree of depth that dashes the entering of cup terrace die and dash the cup die is: (2-4) 7mm is 14-28 mm, and the downward cup punching is completed.

Then, how to determine the specific multiple of "moving speed of the punch slide block by 2-4 times" is represented by the letter T, and the calculation formula is: t ═ H +3)/L, where T represents the multiple, H is the height of the punching cup, and L is the maximum depth of the blanking punch-die closed, such as a certain type of cylindrical battery steel shell, the height H of the punching cup is 25mm, the maximum depth L of the blanking punch-die closed is 7mm, and then the multiple T is (25+3)/7 is 4.

The mechanical device designed in addition in the embodiment is a rotating arm device in fig. 6, spare positions are reserved at two ends of a worktable of the punching machine and are installed, the principle is that the displacement generated by different length points of the rotating arm is in direct proportion to the arm length of the rotating arm, for example, the arm length of the rotating long arm is set to be 4 times that of the short arm, when a sliding block of the punching machine is 7mm away from a bottom dead center, the short arm starts to be pressed down, the short arm generates 7mm displacement, the long arm end realizes 7mm 4 times that 28mm displacement, a fixing plate and a punching cup convex die are pushed, and downward cup punching is realized.

Wherein, the hydraulic means of this example is the same big or small hydro-cylinder closing means in both sides that indicates in figure 7, reserves the big hydro-cylinder of vacant position installation at punch press table surface both ends, and the theory of operation is: when a large oil cylinder piston with the area of S1 is pressed down by a punch press for a distance L, hydraulic oil enters a small oil cylinder with the total area of S2, the small oil cylinder piston is pushed out for a distance H +3, the volume of the hydraulic oil cannot be compressed, S1L is S2 (H +3), the formula T is S1/S2 (H +3)/L is 2-4 times, and H represents the height of a punching cup. For example, the piston diameters of the left large oil cylinder and the right large oil cylinder are 120mm, the piston diameters of the 6 small oil cylinders are 34.65mm, the areas of the pistons of the large oil cylinders and the small oil cylinders are 4 times, namely T is 4, when the punch press slide block is 7mm away from a bottom dead center, L is 7, the blanking male and female dies are closed, blanking is completed, meanwhile, the punch press slide block presses the left large oil cylinder piston and the right large oil cylinder piston downwards, hydraulic oil enters the 6 small oil cylinders through the hydraulic pipeline, the small oil cylinder piston is rapidly pushed out at 4 times, the large oil cylinder piston at the bottom dead center is pressed for 7mm, the small oil cylinder piston rod realizes 7mm 4 x 28mm displacement, the fixing plate and the cup punching male die are pushed, and downward cup.

It is particularly noted that the height of the steel strip plane of the feeding device with the downward punching cup structure is lower than the certain size of the end faces of the blanking male die and the discharging plate (the end faces of the blanking male die and the discharging plate are flush generally), the specific data is not less than, the optimal state is equal to half of the maximum depth of the blanking convex-concave closed entering die, in this example, 7mm/2 is 3.5mm, the purpose is that in the blanking punching cup process, the upper die presses 7mm of the low steel strip, the steel strip is prevented from being pulled in the feeding direction, and the bending deformation of the steel strip is reduced.

The main benefits of the downward cup are: the brewing cup is punched downwards, so that the brewing cup is convenient to convey, and an additional manufacturing device is not needed to be connected to the conveying belt.

The disadvantages of punching the cup down are: in the case of a mechanical or hydraulic equivalent amplification of 4 times displacement, with the same depth of penetration of the blanking punch and die closure of 7mm, the depth of penetration of the punching punch into the punching die is reduced 1/5 for the lower punch compared to the upper punch, i.e. 28mm for the former and 35mm for the latter. In the two examples of the structure of the downward punching cup on the single-action punch, if mechanical or hydraulic design is cancelled, downward punching of the cup without distance amplification can be realized, similarly, when the distance between the blanking female die and the blanking male die (also the punching female die) is 7mm from the bottom dead center, after blanking is completed after the blanking female die and the blanking male die are closed, the blanking female die and the punching male die can simultaneously descend to the bottom dead center under the direct drive of the punch slide block, the distance between the punching male die and the punching female die is also 7mm, the height of the punching cup can not be amplified, and if the distance reaches 35mm, when the distance reaches 35mm, the blanking female die (also the punching female die) needs to complete blanking, and then the downward movement is continued to the bottom dead center for realization.

It should be noted that: even if cylindrical battery steel shell products of the same type have different blanking sizes, the height H of the punching cup is different, and the selection of the multiple of the long arm and the short arm of the lever for punching the cup upwards or downwards or the area ratio of the pistons of the large hydraulic cylinder and the small hydraulic cylinder, namely the size of T, is different.

In addition, it is worth particular noting: if the parameter T is 4 times, the force transmitted by the punch press sliding block to the punching cup male die is reduced to 1/4 no matter the lever or hydraulic principle is used, other times are also analogized, so the times cannot be amplified excessively, and otherwise, the insufficient punching force is caused.

The AA battery steel case embodiment described above is one of the more typical implementations of the present invention, and besides, the present invention can be similarly implemented for other types of cylindrical battery steel cases AAA, 18650, 21700, 22650, 26650, 32650, etc., and changes, modifications, substitutions and variations made to the embodiments without departing from the principle and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. The utility model provides a cylinder battery steel casing is in the design of the many plays blanking of multimode on single action punch press, including upwards and downwards, each three kinds of blanking dashes cup mode, its characterized in that: a plurality of sets of blanking cup punching dies are designed on one set of die frame, and are arranged on a single-row, double-row or even multi-row punching machine, so that multi-die multi-discharge blanking cup punching is realized.

2. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die frame, the blanking cup punching dies are arranged in a single-row, double-row or even multi-row mode and are installed on a single-action punching machine, the lever principle is utilized in the design, the displacement of a long arm and a short arm is in direct proportion to the arm length of the long arm and the short arm, a sliding block of the punching machine drives the short arm end of the lever to move downwards, the long arm end of the lever generates larger displacement to drive a cup punching male die to move upwards quickly, the cup punching male die and a fixed plate are installed below and can slide up and down relative to a lower.

3. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die carrier, the blanking cup punching dies are arranged in a single-row, double-row or even multi-row mode and are installed on a single-action punching machine, the hydraulic principle is utilized in the design, in a closed hydraulic system, the displacement generated by large and small oil cylinder pistons is in inverse proportion to the area of the pistons, the punch press sliding blocks drive the large oil cylinder pistons to move to push out hydraulic oil, the small oil cylinder piston rods generate larger displacement to drive the cup punching male dies to quickly move upwards, the cup punching male dies and the fixed plates are installed below, and the blanking cup punching dies can slide up and down relative to the lower.

4. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die frame, are arranged in a single row, double rows or even multi-row mode and are installed on a single-action punching machine, the lever hydraulic principle design is eliminated, a punching machine sliding block is used for directly driving a cup punching male die to move upwards, the cup punching male die and a fixing plate are installed below, and can slide up and down relative to a lower die frame, so that multi-die multi-output upwards blanking cup punching is realized.

5. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die carrier, the blanking cup punching dies are arranged in a single-row, double-row or even multi-row mode and are installed on a single-action punching machine, the design utilizes a rotating arm principle, the displacement of long and short arm points of the blanking die is in direct proportion to the arm length of the blanking die, a punching machine sliding block drives the rotating short arm points to move downwards, the rotating long arm end generates larger displacement to drive a cup punching male die to move downwards, the cup punching male die and a fixed plate are installed on the punching die and can slide up and down relative to an upper die carrier, and multi-die multi-output.

6. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die carrier, the blanking cup punching dies are arranged in a single-row, double-row or even multi-row mode and are installed on a single-action punching machine, the hydraulic principle is utilized in the design, in a closed hydraulic system, the displacement generated by large and small oil cylinder pistons is in inverse proportion to the area of the pistons, the punch press sliding blocks drive the large oil cylinder pistons to move to push out hydraulic oil, the small oil cylinder piston rods generate larger displacement to drive the cup punching male dies to rapidly move downwards, the cup punching male dies and the fixed plates are installed on the upper die carrier and can slide up and down relative to the upper die carrier.

7. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: a plurality of sets of blanking cup punching dies are designed on a set of die frame, are arranged in a single row, double rows or even multi-row mode and are installed on a single-action punching machine, the lever hydraulic principle design is eliminated, a punching machine sliding block is used for directly driving a cup punching male die to move downwards, the cup punching male die and a fixed plate are installed on the punching machine sliding block and can slide up and down relative to an upper die frame, and multi-die multi-output downward blanking cup punching is realized.

8. The multi-die multi-discharge blanking cup design of the cylindrical battery steel shell on the single-action punch press according to claim 1, characterized in that: the AA battery steel case embodiment described above is one of the more typical implementations of the present invention, and besides, the present invention can be similarly implemented for other types of cylindrical battery steel cases, such as AAA, 18650, 21700, 22500, 267650, 32650, etc., and changes, modifications, substitutions and variations made to the embodiments without departing from the principle and spirit of the present invention still fall within the protection scope of the present invention.