CN110560564B

CN110560564B - U-shaped base progressive die

Info

Publication number: CN110560564B
Application number: CN201910813914.2A
Authority: CN
Inventors: 梅益; 鄢天灿; 吴巧; 甘盛霖; 凡勇
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-01-26
Anticipated expiration: 2039-08-30
Also published as: CN110560564A

Abstract

The invention discloses a U-shaped base progressive die which comprises an upper die base, a male die fixing plate, a lower die base and a female die fixing plate, wherein the male die fixing plate is fixedly connected to the lower side of the upper die base, the female die fixing plate is fixedly connected to the upper side of the lower die base, the upper die base is connected to the lower die base through two large guide pillars, the male die fixing plate is sequentially provided with a first blanking male die, a second blanking male die, a third blanking male die, a second bending female die insert, a first bending male die and a fourth blanking male die from the feeding side to the discharging side, and the female die fixing plate is sequentially provided with a second blanking female die insert, a second blanking male die insert, a first blanking male die insert, a second bending male die insert. The die disclosed by the invention can be used for quickly processing the U-shaped base, and has the advantages of high processing precision, high production efficiency, compact die structure, good product consistency, stable work and high guide precision.

Description

U-shaped base progressive die

Technical Field

The invention relates to a progressive die for a U-shaped base, and belongs to the technical field of progressive dies for U-shaped bases.

Background

The multi-station progressive die of the stamping die has the characteristics of high integration level, easiness in realizing stamping production automation, high stamping precision and the like, has wide application, is the highest production efficiency in the current stamping die, is most suitable for mass production and application, and is suitable for three-dimensional forming and processing of small and medium-sized parts with complex shapes. Aiming at the U-shaped base.

The characteristics of U type base: a three-dimensional model of the U-shaped base is shown in fig. 4. The bending inner diameter R of each part is 3mm, the thickness t is 2mm, the curvature radius rho is 3.72mm, the bending of each part is right-angled bending, the central angle of the bending is 90 degrees, the traditional compound die technology is adopted to produce the U-shaped base, the production period is long, the efficiency is low, the precision of the surface, the position and the like of a workpiece is poor, the quality of the workpiece is difficult to guarantee, the size consistency of the workpiece is poor, and the produced workpiece cannot meet the use performance requirement.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a U-shaped base progressive die to solve the problems in the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a U type base upgrades mould, including the upper die base, punch plate, die holder and die holder, punch plate fixed connection is in the upper die base downside, die holder fixed connection is at the die holder upside, the upper die base is connected to on the die holder through two big guide pillars, punch plate has set gradually blanking terrace die one from feeding one side to ejection of compact one side, blanking terrace die two, blanking terrace die three, crooked die insert two, crooked terrace die one and blanking terrace die four, die holder has set gradually blanking die insert two from feeding one side to ejection of compact one side, blanking terrace die insert two, blanking terrace die insert one, crooked terrace die two, crooked die insert one and blanking die insert one.

Preferably, the lower end of the large guide pillar is fixedly connected to the lower die base, a first reset spring is sleeved outside the large guide pillar, a guide sleeve is sleeved outside the upper end of the large guide pillar, and the guide sleeve is fixedly connected to the upper die base.

Preferably, flexible stripper is installed to above-mentioned punch plate below, two discharge screws of stripper fixed connection, and it is spacing to lean on the major part of discharge screw behind every discharge screw passes punch plate, and the discharge screw has cup jointed reset spring, and reset spring upper and lower end supports respectively to lean on at upper die base downside and stripper upside.

Preferably, the female die fixing plate is provided with a pair of ejector rods, and the pair of ejector rods are positioned on the feeding side of the second bending male die.

Preferably, the female die fixing plate is provided with a pair of material guiding pins, the pair of material guiding pins are located beside the second blanking female die insert, and the upper ends of the material guiding pins are provided with annular grooves for limiting the material plates.

Preferably, the upper die base is provided with a positioning pin, and the positioning pin is positioned beside the bending male die.

Preferably, the male die fixing plate is fixedly connected with a small guide pillar, the small guide sleeve is arranged on the stripper plate, and the small guide pillar penetrates through the small guide sleeve and is inserted into the through hole in the female die fixing plate.

Preferably, the stripper plate is fixedly connected with a limit nail, the limit nail penetrates through the punch plate and then enters the through hole in the upper die base, the limit nail is sleeved with a spring, and two ends of the spring are respectively abutted against the lower end step holes of the stripper plate and the upper die base.

The invention has the beneficial effects that: compared with the prior art, the die disclosed by the invention can be used for rapidly processing a U-shaped base, the processing precision is high, the production efficiency is high, the die is compact in structure, good in product consistency and stable in work, the guide pillar, the guide sleeve and the guide die frame are stable in work, the guide precision is high, the floating guide pin with the guide function annular groove ensures the positioning in the vertical feeding direction, meanwhile, an automatic feeding device is used for roughly positioning a strip material, the positioning pin is used for finely positioning so as to ensure the positioning of the feeding step pitch, the limiting nail is additionally arranged in the die, the abrasion of the male die and the female die is avoided, and the elastic discharging device is used for ensuring the quality of a punching piece.

Drawings

FIG. 1 is a schematic top view of a mold;

FIG. 2 is a cross-sectional structural view in front elevation of the mold;

FIG. 3 is a schematic right sectional view of the mold;

FIG. 4 is a schematic structural view of a mold making part;

FIG. 5 is a schematic diagram of a stock layout process.

In the figure, 1-lower die holder, 2-die holder, 3-die holder, 4-die holder backing plate, 5-small guide sleeve, 6-small guide post, 7-blanking first punch, 8-unloading screw, 9-spring, 10-blanking second punch, 11-blanking third punch, 12-die shank, 13-bending first punch, 14-positioning pin, 15-spring, 16-limit nail, 17-upper die holder, 18-stripper backing plate, 19-stripper, 20-die holder backing plate, 21-blanking fourth punch, 22-blanking first die, 23-bending first die insert, 24-ejector pin, 25-bending second punch, 26-bending second die insert, 27-blanking first die insert, 28-second blanking punch insert, 29-guide pin, 30-second blanking die insert, 31-8 x50 cylindrical pin, 32-6 x20 cylindrical pin, 33-large guide sleeve and 34-large guide column.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1-5, a U-shaped base progressive die comprises an upper die base 17, a punch plate 3, a lower die base 1 and a die plate 2, wherein a die handle 12 is fixedly connected to the middle of the upper end of the upper die base 17, the punch plate 3 is fixedly connected to the lower side of the upper die base 17 through a screw and a first cylindrical pin 31 (which plays a role of accurate positioning), a punch plate backing plate 4 is arranged between the punch plate 3 and the upper die base 17, the die plate 2 is fixedly connected to the upper side of the lower die base 1 through a screw and a cylindrical pin, a die plate backing plate 20 is arranged between the die plate 2 and the lower die base 1, the upper die base 17 is connected to the lower die base 1 through two guide posts 34, the punch plate 3 is sequentially provided with a first blanking punch 7, a second blanking punch 10, a third blanking punch 11, a second bending die insert 26, a first bending punch 13 and a, the die fixing plate 2 is sequentially provided with a blanking die insert II 30, a blanking die insert II 28, a blanking die insert I27, a bending die insert II 25, a bending die insert I23 and a blanking die insert I22 which correspond to the blanking die I7, the blanking die II 10, the blanking die III 11, the bending die insert II 26, the bending die I13 and the blanking die IV 21 one by one from the feeding side to the discharging side, and the die adopts a four-guide-post guide die frame. The guide is stable, the guide is accurate and reliable, and the rigidity is good.

Preferably, the lower end of the large guide post 34 is fixedly connected to the lower die holder 1, a first return spring is sleeved outside the large guide post, a guide sleeve 33 is sleeved outside the upper end of the large guide post, and the guide sleeve 33 is fixedly connected to the upper die holder 17.

Preferably, flexible stripper 19 is installed to above-mentioned punch plate 3 below, 19 upsides of stripper pass through screw and two 32 (play the accurate positioning effect) fixedly connected with stripper backing plates 18 of cylindric lock, two discharge screw 8 of 19 fixed connection of stripper, every discharge screw 8 passes punch plate 3 and leans on the major part of discharge screw 8 spacing, discharge screw 8 has cup jointed reset spring 9, reset spring 9 upper and lower end supports respectively and leans on 17 downside and 19 upsides of stripper, the mode precision of unloading is high, there is the effect of pressing the material, be applicable to the more mould that upgrades of terrace die, the discharge screw: the function of the device is to remove the material fastened on the male die, and the circumferential surface of the device is provided with a spring. The diameter of the discharge screw is 6.5mm, the number of the discharge screw is 4, and the length of the working part is 55 mm.

Preferably, the die holder 2 is provided with a pair of ejector pins 24, the pair of ejector pins 24 is positioned on the feeding side of the second bending punch 25, and the molded part is fastened to the die by the action of the punch and die during the molding process such as bending or drawing, so that the stripping is difficult. The function of the ejector rod is designed to eject the parts out of the female die, two parts are designed at each bending station, 4 parts in total, and the diameter of each part is 4 mm.

Preferably, be provided with a pair of guide round pin 29 on the fixed die plate 2, a pair of guide round pin 29 is located blanking die insert two 30 by side, and guide round pin 29 upper end is provided with the ring channel of spacing flitch, can treat the flitch of processing and play the effect of the steady walking of direction, the guide round pin: the function of the feeding device is to smoothly feed the strip material. The carrier form is middle carrier, so only preceding station can be used, and required quantity is 4, distributes in the both sides of part, and the bottom has the spring.

Preferably, the upper die holder 17 is provided with a positioning pin 14, the positioning pin 14 is located beside the first bending punch 13 and can position the material plate, the diameter of the end of the positioning pin is 3mm, the size of the upper portion of the positioning pin is 5mm, the size of the installation portion of the positioning pin is 8mm, the length of the positioning pin is from the punch fixing plate to the plate, the length of the positioning pin is 54mm, and the number of the positioning pins is 3.

Preferably, the male die fixing plate 3 is fixedly connected with a small guide pillar 6, the small guide sleeve 5 is arranged on the discharging plate 19, and the small guide pillar 6 penetrates through the small guide sleeve 5 and is inserted into the through hole in the female die fixing plate 2, so that directional discharging can be realized.

Preferably, the stripper plate 19 is fixedly connected with a limit pin 16, the limit pin 16 penetrates through the punch retainer plate 3 and then enters the through hole in the upper die base 17, the limit pin 16 is sleeved with a spring 15, and two ends of the spring 15 respectively abut against the lower end step holes of the stripper plate 19 and the upper die base 17, so that the stripper plate can be limited.

Adopting a vertical arrangement mode for layout: a first station: punching a guide hole; a second station: punching; a third station: trimming; a fourth station: a vacancy; a fifth station: bending; a sixth station: bending in a Z shape; a seventh station: a vacancy; an eighth station: and (6) cutting off. As shown in FIG. 5, the minimum lap value between the workpieces was 2.2mm, and the flank value was 2.5 mm. The width of the material is 105.51mm, the step pitch of the strip material is 48.04mm, the number of stations is increased, the bending quality of the part is ensured, and the precision of the produced part is relatively high.

Selection of press with die shank connection: according to the total punching force F =492754N, a press with the model number of J23-63 and the tonnage of 630 is primarily selected. The main technical parameters are as follows: the maximum pressure of the press is 630000N, the stroke of the slide block is 130mm, the size of the highest die carrier capable of being assembled is 360mm, the maximum length of the die carrier capable of being installed is 710mm, and the maximum width is 480 mm. The die shank was selected according to the press, with dimensions (diameter x depth): phi 50x70 mm.

Selecting a pressure center of the die: the selection of the center of pressure of the die is essentially the selection of a resultant point of the stamping. In the progressive die, each station is press-forced except for the empty stations. The pressure center of the die is determined, so that the die cannot bear eccentric stamping force during production, and the die is prevented from being damaged. Through calculation, the coordinates of each station are as follows: a first station: punching a pilot hole (3.5, 42.33), and a second station: punch (70.35, 42.33), third station: trimming (145.5, 53.1), fourth station: vacancy, fifth station: bend (217.8, 23.84), sixth station: z-bend (266, 63.33), seventh station: vacancy, eighth station: cutting (342.8, 42.3) to finally obtain the center of pressure (x 0, y 0) = (160, 51.6) of the mold.

Each male die in the invention adopts an inlaid male die structure, so that the difficulties caused by forging, heat treatment and machining in the manufacturing process of the male die are reduced, and the using amount of expensive die steel can be reduced. The male die and the fixing plate of the male die are in transition fit through H7/m6, and meanwhile, the non-working end of the male die is designed to be a local shoulder, so that the non-working end of the male die is fixed between the male die backing plate and the male die fixing plate in the vertical direction, and the male die is prevented from being pulled out by the female die during working.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.

Claims

1. The utility model provides a U type base upgrades mould which characterized in that: comprises an upper die holder (17), a punch fixing plate (3), a lower die holder (1) and a die fixing plate (2), wherein the punch fixing plate (3) is fixedly connected to the lower side of the upper die holder (17), the die fixing plate (2) is fixedly connected to the upper side of the lower die holder (1), the upper die holder (17) is connected to the lower die holder (1) through two guide posts (34), the punch fixing plate (3) is sequentially provided with a first blanking punch (7), a second blanking punch (10), a third blanking punch (11), a second bending die insert (26), a first bending punch (13) and a fourth blanking punch (21) from the feeding side to the discharging side, the die fixing plate (2) is sequentially provided with a second blanking die insert (30), a second blanking punch insert (28), a first blanking punch insert (27), a second bending punch (25), a first bending die insert (23) and a first blanking die insert (22) from the feeding side to the discharging side; the male die fixing plate (3) is fixedly connected with a small guide pillar (6), a small guide sleeve (5) is arranged on the discharging plate (19), and the small guide pillar (6) penetrates through the small guide sleeve (5) and is inserted into a through hole in the female die fixing plate (2); stripper (19) fixedly connected with stop pin (16), stop pin (16) pass punch plate (3) back enter into the through-hole in upper die base (17) in, and spring (15) have been cup jointed to stop pin (16), and spring (15) both ends are supported respectively and are leaned on in the lower extreme step hole of stripper (19) and upper die base (17).

2. The U-base progressive die of claim 1, wherein: the lower end of the large guide post (34) is fixedly connected to the lower die holder (1), a first reset spring is sleeved outside the large guide post, a guide sleeve (33) is sleeved outside the upper end of the large guide post, and the guide sleeve (33) is fixedly connected to the upper die holder (17).

3. The U-base progressive die of claim 1, wherein: the flexible stripper (19) is installed to punch plate (3) below, two discharge screw (8) of stripper (19) fixed connection, and it is spacing to lean on the major part of discharge screw (8) behind punch plate (3) that every discharge screw (8) passes, and reset spring (9) have been cup jointed in discharge screw (8), and reset spring (9) upper and lower end supports respectively to lean on at upper die base (17) downside and stripper (19) upside.

4. The U-base progressive die of claim 1, wherein: and a pair of ejector rods (24) is arranged on the female die fixing plate (2), and the pair of ejector rods (24) is positioned on the feeding side of the second bending male die (25).

5. The U-base progressive die of claim 1, wherein: a pair of material guiding pins (29) are arranged on the female die fixing plate (2), the pair of material guiding pins (29) are positioned beside the second blanking female die insert (30), and the upper ends of the material guiding pins (29) are provided with annular grooves of limiting material plates.

6. The U-base progressive die of claim 1, wherein: the upper die holder (17) is provided with a positioning pin (14), and the positioning pin (14) is positioned beside the first bending male die (13).