CN112317614A

CN112317614A - Blanking and punching compound die

Info

Publication number: CN112317614A
Application number: CN202011267259.4A
Authority: CN
Inventors: 高学广
Original assignee: Ninglin Foundry Hanshan County Anhui Province
Current assignee: Ninglin Foundry Hanshan County Anhui Province
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-02-05

Abstract

The invention provides a blanking and punching compound die, which comprises a compound die body; the bottom of the compound die body is provided with a lower die holder; a male-female die fixing plate is arranged above the center of the lower die holder; a stripper plate is arranged above the male and female die fixing plate; a perforated concave-convex die is arranged at the central position of the discharging plate and the concave-convex die fixing plate; the bottom of the concave-convex die is fixed on the lower die base; a pushing block is arranged at the top of the male die and the female die; concave dies are arranged on two sides of the pushing block; a male die is arranged on the pushing piece block; the top of the male die is fixed on the male die fixing plate; a base plate is arranged above the male die fixing plate; an upper die holder is arranged above the base plate; the top of the upper die base is provided with a die handle; and a knockout device is arranged below the die handle and in the central position in the upper die base. The die is high in manufacturing efficiency, production efficiency and production precision, and compared with the traditional blanking and punching die, the manufacturing process is simple and simple in structure.

Description

Blanking and punching compound die

Technical Field

The invention belongs to the field of machining, and particularly relates to a blanking and punching compound die.

Background

At present, the stamping technology in China is still quite lagged behind compared with the industrially developed countries, and the main reason is that China has quite large differences with the industrially developed countries in the aspects of stamping basic theory, forming process, die standardization, die design, die manufacturing process, equipment and the like, so that China has quite large differences with the dies in the industrially developed countries in the aspects of service life, efficiency, processing precision, production period and the like. The mold industry is the basic industry of national economy and is important process equipment for industrial production. The mold industry in advanced countries has got rid of subordination and developed into an independent industry.

Although the mold industry in China develops rapidly, the mold industry is far from meeting the requirement of national economic development. Firstly, the system is not smooth, and the foundation is weak; secondly, the development capability is poor, and the economic benefit is poor; thirdly, the level of process equipment is low, the matching performance is poor, and the utilization rate is low; fourthly, the degree of specialization, standardization and commercialization is low, and the cooperation is poor; fifth, mold materials and mold-related techniques fall behind.

The supporting piece is processed by three basic punching procedures of punching, blanking and bending, and the following three process schemes can be generally drawn up: the first scheme is as follows: processing by a simple die for three times, namely blanking, punching and bending; scheme II: a blanking, bending and punching progressive die; the third scheme is as follows: blanking, punching and compound die, and bending.

The method has the advantages that the production rate is low, the accumulated error of the workpiece is large, the operation is inconvenient, and the workpiece is produced in medium-batch mode, so the method has the advantages of the scheme two and the scheme three. But the line position precision and the size precision of the compound die are easy to guarantee, and the productivity is high. Although the mold structure is relatively complicated, the mold is not difficult to manufacture due to the simple symmetry of the part geometry. The progressive die has high productivity, but the punching accuracy of parts is slightly poor. To ensure the slide accuracy of the stamping part, a guide pin needs to be arranged on the die for guiding, so that the die is more complex to manufacture and install than a compound die.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a blanking and punching compound die.

A blanking and punching compound die comprises a compound die body; the bottom of the compound die body is provided with a lower die holder; a male-female die fixing plate is arranged above the center of the lower die holder; a stripper plate is arranged above the male and female die fixing plate; a perforated concave-convex die is arranged at the central position of the discharging plate and the concave-convex die fixing plate; the bottom of the concave-convex die is fixed on the lower die base; a pushing block is arranged at the top of the male die and the female die; concave dies are arranged on two sides of the pushing block; a male die is arranged on the pushing piece block; the top of the male die is fixed on the male die fixing plate; a base plate is arranged above the male die fixing plate; an upper die holder is arranged above the base plate; the top of the upper die base is provided with a die handle; a knockout device is arranged below the die handle and in the central position in the upper die base; the knockout device comprises a knockout rod, a connecting push plate and a push plate; a push plate is arranged below the striking rod; a connecting push rod is arranged below the push plate; the connecting push rod penetrates through the male die fixing plate and is contacted with the push piece block.

In the blanking and punching compound die, the upper die base and the lower die base are fixed through the guide pillar; and a gap between the guide pillar and the upper die base is filled by the guide sleeve.

In the blanking and punching compound die, the female die is provided with the material guide pin and the material stop pin.

According to the blanking and punching compound die, the female die is fixed on the female die fixing plate through the fixing screw.

In the blanking and punching compound die, the die handle is a flange C-shaped die handle.

The blanking and punching compound die is characterized in that a discharging screw is arranged between the male die fixing plate and the female die fixing plate and the discharging plate.

The invention has the beneficial effects that: the die is high in manufacturing efficiency, production efficiency and production precision, and compared with the traditional blanking and punching die, the manufacturing process is simple and simple in structure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the female mold of the present invention;

fig. 3 is a schematic view of a discharge screw.

Detailed Description

The invention will be further described in detail with reference to examples of embodiments shown in the drawings to which, however, the invention is not restricted.

In the description of the present invention, it should be noted that the terms "center, upper, lower, left, right, vertical, horizontal, inner, outer" and the like indicate orientations or positional relationships based on those shown in the drawings only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus are not to be construed as limiting the present invention, and furthermore, the terms "first, second and third" are used for descriptive purposes only and are not intended to indicate or imply relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly stated or limited, the term "mounted, connected" is to be understood in a broad sense, for example: the two elements may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected inside two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present invention provides a technical solution: a blanking and punching compound die comprises a compound die body 0; the bottom of the composite die body 0 is provided with a lower die holder 1; a male-female die fixing plate 3 is arranged above the center of the lower die holder 1; a discharging plate 4 is arranged above the male and female die fixing plate 3; the center positions of the stripper plate 4 and the male-female die fixing plate 3 are provided with a through male-female die 15; the bottom of the concave-convex die 15 is fixed on the lower die holder 1; a pushing block 14 is arranged at the top of the concave-convex die 15; concave dies 20 are arranged on two sides of the pushing piece block 14; a discharging screw 16 is arranged between the female die 20 and the female die fixing plate 3; the female die 20 is provided with a material guide pin 18 and a material stop pin 17; the push piece block 14 is provided with a male die 9; the top of the male die 9 is fixed on the male die fixing plate 8; a backing plate 7 is arranged above the male die fixing plate 8, and in the adopted elastic discharging device, a device and a yielding space for parts such as a push plate 12 and the like are arranged in an upper die base 6, so that the thickness of the device is thinned, and the compressive strength of the device is influenced, and therefore, the backing plate 7 is required to be arranged; an upper die holder 6 is arranged above the backing plate 7; the upper die holder 6 and the lower die holder 1 are fixed through a guide pillar 2; the gap between the guide post 2 and the upper die base 6 is filled by a guide sleeve 5; the top of the upper die base 6 is provided with a die handle 11, a flange C-shaped die handle 11 is selected in the die, and the die is connected with the upper die base through threads and is prevented from rotating by adding screws. The die shank 11 can better ensure that the axis is vertical to the axis of the upper die base 6, the die shank 11 is made of Q235 steel, the supporting surface of the die shank 11 is vertical to the axis of the die shank 11 (the verticality is not more than 0.02:100), and the die shank 11 is selected to be in a standard size in the die; a knockout device is arranged below the die handle 11 and in the central position inside the upper die base 6, and comprises a knockout rod 10, a connecting push plate 13 and a push plate 12; a push plate 12 is arranged below the striking rod 10; a connecting push rod 13 is arranged below the push plate 12; the connecting push rod 13 penetrates through the punch retainer plate 8 and is in contact with the ejector pad 14, the knock-out rod 10 is adopted in the die to push the connecting push rod 12 to complete the knock-out action, the knock-out rod 10 penetrates through the die shank 11 and is exposed outside the die, when one-time blanking is completed, the press slide block returns, the knock-out rod collides with a knock-out cross rod of the press, and the knock-out rod 10 pushes the connecting push rod 13 to knock down a workpiece clamped in a die hole of a punch and die.

Assembling the die:

a) and (4) preparing before assembly, reading design patterns and knowing the structural characteristics of the blanking die of the guide plate. The key points of the assembly process of the die are as follows: the clearance between the male die and the female die is uniform; checking the machining process before the assembly of each part, and checking to be qualified; determining an assembly method and an assembly sequence; checking and confirming that the mould part is processed, and adopting a direct assembly method; and (4) combining the structural characteristics of the die, firstly performing grouping assembly on the male die and the female die, and then performing general assembly. The convex-concave die is used as a reference part, the lower die is assembled, and the upper die and the auxiliary parts are assembled.

b) Assembly die handle

After the die handle is pressed into the upper die base, a pin hole is drilled and reamed, and a rotation stop pin is driven in.

c) Assembling male die

And pressing the punching male die into the fixed plate according to the operation requirement of the pressing method, checking the verticality of the male die and the female die relative to the reference surface of the fixed plate, cutting the edge into the male die, and checking the uniformity of the fit clearance by using a process locator method. And grinding the supporting surface of the fixing plate and the edge surface of the convex-concave die after the convex-concave die is completely pressed in and the gap distribution is determined to be uniform.

d) Assembly lower die

And (3) mounting the integral female die on a lower die base according to the position required by design, fastening a screw, drilling and reaming a pin hole, and loading the pin hole into a cylindrical pin.

e) Assembling upper die

And (3) mounting the assembled punching male die on the upper die, tightening the screw, and controlling the fit clearance of the upper die and the lower die by using a process locator method to ensure that the punch is uniform. After the uniformity is determined, drilling and reaming pin holes at corresponding positions of the upper die, and driving round pins.

f) Trial cutting

And (3) punching by paper, observing the condition of punching the paper edge, adjusting and determining to be uniform, drilling and hinging another group of pin holes, and driving round pins.

g) Test mold

And (4) installing an ejector rod and a blank holder on the die, and checking the working reliability of the knockout mechanism. The stripper plate also plays a role in material pressing before stamping, so that when the stripper plate is at the highest position, the stripper plate and the spring are installed to protrude 0.2-0.5mm from the cutting edge of the male and female dies, the lower plane of the installed stripper plate is 0.2-0.5mm lower than the cutting edge surface of the male and female dies, and the assembled die is used for trial stamping on a designed and appointed press machine.

And in the process of testing the die, whether the actions of the knockout mechanism and the ejection mechanism are timely and reliable is mainly checked. After each punching, when the upper die moves up to the top dead center along with the press, the strip and the ejected workpiece should appear on the working surface of the lower die and the female die so as to be removed in time.

After assembly, the uniform gap is ensured, and the edge face of the blanking female die is 2mm higher than the working end face of the punching male die.

The working process is as follows: when the die works, a blank (namely a strip plate) is placed on the female die and fed along the guide pin 18, the stop pin 17 is positioned, the die moves downwards to finish blanking and punching, when the blanking male die returns along with the upper die, the strip material is unloaded by the unloading plate 4, a part product finishes unloading under the action of the pushing plate and the knock-out rod, punching waste materials fall out from a lower die seat hole, and the next work is continuously finished.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a blanking punching compound die which characterized in that: comprises a composite mould body; the bottom of the compound die body is provided with a lower die holder; a male-female die fixing plate is arranged above the center of the lower die holder; a stripper plate is arranged above the male and female die fixing plate; a perforated concave-convex die is arranged at the central position of the discharging plate and the concave-convex die fixing plate; the bottom of the concave-convex die is fixed on the lower die base; a pushing block is arranged at the top of the male die and the female die; concave dies are arranged on two sides of the pushing block; a male die is arranged on the pushing piece block; the top of the male die is fixed on the male die fixing plate; a base plate is arranged above the male die fixing plate; an upper die holder is arranged above the base plate; the top of the upper die base is provided with a die handle; a knockout device is arranged below the die handle and in the central position in the upper die base; the knockout device comprises a knockout rod, a connecting push plate and a push plate; a push plate is arranged below the striking rod; a connecting push rod is arranged below the push plate; the connecting push rod penetrates through the male die fixing plate and is contacted with the push piece block.

2. The blanking-punching compound die of claim 1, characterized in that: the upper die holder and the lower die holder are fixed through a guide pillar; and a gap between the guide pillar and the upper die base is filled by the guide sleeve.

3. The blanking-punching compound die of claim 1, characterized in that: and the female die is provided with a material guide pin and a material stop pin.

4. The blanking-punching compound die of claim 1, characterized in that: the female die is fixed on the female die fixing plate through a fixing screw.

5. The blanking-punching compound die of claim 1, characterized in that: the die handle is a flange C-shaped die handle.

6. The blanking-punching compound die of claim 1, characterized in that: and a discharging screw is arranged between the male and female die fixing plate and the discharging plate.