CN104384348B - One-step deep-drawing forming die for cylindrical metallic components - Google Patents

Abstract

A mold for one-time deep drawing of cylindrical metal parts is provided, which has an upper mold and a lower mold, a concave-convex mold is arranged in the central hole of the elastic unloading device, and the concave-convex mold is fixed on the lower end surface of the upper mold, The lower end of the concave and convex die is formed with a deep drawing hole, and the upper end of the concave die is provided with a part blank, and the part blank is pressed by the elastic device through the downward movement of the upper die. Cooperate with deep drawing to form a cylindrical part. When the upper die moves down to the position where the concave-convex die is inserted into the center hole of the die, the outer circle of the part blank is cut through the cooperation of the concave-convex die and the die. The upper die moves down to the center hole of the die. After the cylindrical part is deep-drawn, the part is sheared by the interaction between the shearing boss made on the deep-drawing punch and the lower end of the deep-drawing hole. The invention has the advantages of simple structure and convenient operation, and the cylindrical part is formed at one time without secondary processing, which reduces the manufacturing cost of the cylindrical part and shortens the processing cycle.

Description

Dies for one-time deep drawing of cylindrical metal parts

technical field

The invention belongs to the technical field of molds for processing mechanical parts, and in particular relates to a mold for one-time deep drawing of cylindrical metal parts.

Background technique

At present, the deep drawing of cylindrical metal parts is one of the main stamping processes, which is mainly used in the machinery industry. The forming of traditional cylindrical metal parts is mainly completed by the deep drawing process, but the main problems of the traditional deep drawing die structure are When metal parts are formed, the height and dimension of the part cannot be guaranteed. To ensure the height and dimension of the part, it can only be completed by lathe or trimming process. This has caused the disadvantages of high manufacturing cost of cylindrical metal parts, long processing cycle of parts, and low production efficiency. Therefore, , it is necessary to improve.

Contents of the invention

The technical problem solved by the present invention is to provide a mold for one-time deep drawing and forming of cylindrical metal parts. After the concave and convex die is moved down, the drawing forming hole and the upper end of the drawing punch are combined to form a cylindrical part. , and the lower end of the outer peripheral wall of the concave-convex die cooperates with the upper wall of the central hole of the die to cut the outer circle of the part blank, and the shearing boss interacts with the lower end of the deep-drawing forming hole to cut the part to ensure the height dimension of the cylindrical part. At the same time, no secondary processing is required, which greatly reduces the manufacturing cost of the cylindrical parts and shortens the processing cycle.

The technical scheme adopted in the present invention: a mold for one-time deep-drawing of cylindrical metal parts has an upper mold and a lower mold, and the lower end surface of the upper mold is provided with an elastic unloading device, and the center of the elastic unloading device A concave-convex die is provided in the hole and the concave-convex die is fixed on the lower end surface of the upper die. The axial lower end of the concave-convex die is formed with a drawing forming hole. The drawing punch is placed in the central hole of the punch fixing plate and fixed on the lower die through the punch fixing plate. The upper surface of the punch fixing plate is provided with a part blank, and the part blank is made by moving down the upper mold. After being pressed by the elastic device, the drawing forming hole cooperates with the upper end of the drawing punch to form a cylindrical part. When the upper die moves down to the position where the concave-convex die is inserted into the center hole of the die, it passes through the concave-convex die and the center hole of the die. The outer circle of the part blank is sheared by the cooperation, and the upper die is moved down to the deep-drawing of the cylindrical part, and the part is sheared by the interaction between the shear boss made on the deep-drawing punch and the lower end of the deep-drawing hole. .

Wherein, the elastic unloading device includes a pressing plate, a stepped screw, a spring, and a concave-convex mold fixing plate, and the upper mold is formed with a stepped hole I and a through hole, the pressing plate is located under the upper mold and the lower end of the stepped screw passes through The stepped hole I and the hole on the concave-convex die fixing plate at the lower end of the upper die are screwed together with the screw holes on the pressure plate to fix, and the spring is set on the stepped screw and placed on the upper and lower ends of the spring on the left side of the pressure plate respectively. The upper end of the spring on the right side of the pressing plate is placed in the hole of the fixing plate of the concave and convex mold and is against the lower end of the upper mold, and the lower end of the spring is against the upper surface of the pressing plate. The upper end of the inner wall of the center hole of the fixing plate is limited with a limiting groove I, and the concave-convex mold is placed in the center hole of the concave-convex mold fixing plate and the pressure plate, and the limiting boss I made on the upper end of the concave-convex mold cooperates with the limiting groove I , the concave and convex mold is axially formed with a central through hole and the central through hole communicates with the drawing forming hole, the tie rod passes through the through hole and the central through hole and is fixedly connected with the top block arranged in the drawing forming hole and passed through the top block Move down to eject the formed cylindrical part from the deep drawing hole.

Further, the punch fixing frame includes a punch fixing plate, a pad, a ejector and a die, the punch fixing plate is placed on the upper end surface of the lower mold, and the lower end of the ejector rod passes through the punch fixing plate in turn. The stepped hole II and the light hole made on the lower die protrude from the lower die and place it outside, the pad is placed on the upper surface of the punch fixing plate and the die is placed on the pad, and the upper ends of the long screws pass through in turn The counterbore on the lower die, the holes on the punch fixing plate and the pad are screwed together with the threaded holes made on the die, and the top piece is placed in the center hole of the pad and the die and passed through the die. and the punch fixing plate to limit the upper and lower strokes of the ejector, the drawing punch is formed with a shear boss and its lower end limits the limit boss II, and the drawing punch passes through the punch fixing plate And the rear limiting boss II of the center hole of the ejector cooperates with the limiting groove II made on the lower end of the inner wall of the center hole of the punch fixing plate, and the part blank is placed on the upper end surface of the die and is made on the After the holes on the upper end surface on the left side of the die are matched, the part blank is positioned and fixed on the die.

Further, when the upper mold moves down to the position where the concave-convex mold is inserted into the central hole of the concave-convex mold, the outer circumference of the part blank is sheared through the cooperation between the lower end of the outer peripheral wall of the concave-convex mold and the upper wall surface of the central hole of the concave-convex mold.

Advantage of the present invention compared with prior art:

1. After the concave and convex die is moved down, the drawing forming hole and the upper end of the drawing punch are combined to form a cylindrical part. The shape and size of the cylindrical part are accurate and the consistency of each part is good;

2. Cooperate with the lower end of the outer peripheral wall of the concave-convex die and the upper wall of the center hole of the die to cut the outer circle of the blank, and the shearing boss and the lower end of the deep-drawing hole interact to cut the part, and the cylindrical shape is formed after deep-drawing Parts are cut to form cylindrical parts at one time without secondary processing, which reduces the manufacturing cost of cylindrical parts and shortens the processing cycle;

3. The structure is simple, the operation is convenient, the process of processing and discharging is mechanized, the height and dimension of the cylindrical parts are guaranteed, and the reliability of the processing process is improved.

Description of drawings

Fig. 1 is the structural representation when opening mold of the present invention;

Fig. 2 is a schematic diagram of the working state structure of the present invention.

detailed description

A kind of embodiment of the present invention is described below in conjunction with accompanying drawing 1,2.

The mold for one-time deep drawing of cylindrical metal parts has an upper mold 17 and a lower mold 18, and the lower end surface of the upper mold 17 is provided with an elastic device, and the central hole of the elastic device is provided with a concave-convex mold 11 and The concave-convex die 11 is fixed on the lower end surface of the upper die 17, and the axial lower end of the concave-convex die 11 is formed with a drawing forming hole 19, and the upper end surface of the lower die 18 is provided with a drawing punch 3 and a punch fixing plate. The drawing punch 3 is placed in the central hole of the punch fixing plate and is fixed on the lower die 18 by the punch fixing plate. After being pressed by the elastic unloading device, the drawing forming hole 19 cooperates with the upper end of the drawing punch 3 to form a cylindrical part. The upper die 17 moves down to the concave-convex mold 11 and passes through the concave-convex mold when it is inserted into the center hole of the concave-convex mold. 11 Cooperate with the wall surface of the center hole of the concave die to cut the outer circle of the part blank, and the upper die 17 moves down to the deep drawing of the cylindrical part and is formed by the shearing boss 20 and the drawing The lower end of the deep forming hole 19 interacts to cut the part; when the upper mold 17 moves down to the position where the concave-convex mold 11 is inserted into the center hole of the concave-convex mold 6, the lower end of the outer peripheral wall of the concave-convex mold 11 cooperates with the upper wall surface of the central hole of the concave-convex mold 6 Cut the outer circle of the part blank. Specifically, the elastic device includes a pressure plate 7, a stepped screw 8, a spring 9, and a concave-convex die fixing plate 13. The upper die 17 is formed with a stepped hole I21 and a through hole 22. The pressure plate 7 is located below the upper mold 17 and the lower end of the stepped screw 8 passes through the stepped hole I21 and the hole on the concave-convex mold fixing plate 13 located at the lower end of the upper mold 17, and is screwed and fixed with the screw hole on the pressure plate 7. The spring 9 is sleeved on the stepped screw 8 and the upper and lower ends of the spring 9 placed on the left side of the pressing plate 7 are respectively against the lower end surface of the concave-convex die fixing plate 13 and the upper end surface of the pressing plate 7, and the upper end of the spring 9 on the right side of the pressing plate 7 is placed In the hole of the concave-convex mold fixing plate 13 and against the lower end surface of the upper mold 17 and the lower end of the spring 9 is against the upper end surface of the pressure plate 7, the inner wall surface of the center hole of the concave-convex mold fixing plate 13 limits the limit groove I23. The mold 11 is placed in the center hole of the concave-convex mold fixing plate 13 and the pressure plate 7, and the limiting boss I24 on the upper end of the concave-convex mold 11 is matched with the limiting groove I23. The concave-convex mold 11 is axially formed with a central through hole 25 And the central through hole 25 communicates with the drawing forming hole 19, and the pull rod 12 passes through the through hole 22 and the central through hole 25 and is fixedly connected with the top block 10 arranged in the drawing forming hole 19 and is formed by the downward movement of the top block 10. The cylindrical parts are ejected from the deep-drawing forming hole 19; the punch fixing frame includes a punch fixing plate 4, a spacer 15, a top piece device 5 and a die 6, and the punch fixing plate 4 is placed The upper end surface of the lower mold 18, the lower end of the push rod 16 passes through the stepped hole II26 made on the punch fixing plate 4 and the light hole made on the lower mold 18, and then protrudes from the lower mold 18 and places it outside. The pad frame 15 Place on the upper end surface of the punch fixing plate 4 and the die 6 is placed on the pad frame 15, and the upper end of the long screw 1 passes through the upper counterbore 27 of the lower mold 18, the hole on the punch fixing plate 4 and the pad frame 15 and then connects with the The threaded hole on the die 6 is screwed and fixed, and the ejector 5 is placed on the pad 15 And in the center hole of the die 6 and through the die 6 and the punch fixing plate 4, the upper and lower strokes of the ejector 5 are limited. The drawing punch 3 is formed with a shearing boss 20 and its lower end is limited. Positioning boss II 28, the drawing punch 3 passes through the center hole of the punch fixing plate 4 and the ejector 5, and then the limiting boss II 28 is connected with the limiting concave at the lower end of the inner wall of the punch fixing plate 4 center hole. Groove II2 cooperates, and described part blank is placed on the upper end surface of die 6 and is fixed on the die 6 after positioning pin 14 is matched with the hole that is made on the upper end face of the left side of die 6 .

When in use, the mold is installed and fixed on a common stamping machine tool. After the work starts, the stamping machine tool slider moves upward and drives the upper mold 17 to move upward through the upper mold handle of the machine tool, so that the mold upper mold 17 and the lower mold 18 are partially separated, and then Put the part blank into the upper end surface of the die 6 and precisely position it through the positioning pin 14, the stamping machine slider drives the upper die 17 to move downward through the die handle, and the spring 9 makes the pressure plate 7 and the ejector 5 move from the upper and lower parts respectively Press the part blank in the lower two directions at the same time, the upper die 17 continues to move downward, the punch and die 11 enters the center hole of the die 6, first cuts the outer circle of the part blank, and then stretches the punch 3 to enter the pull of the punch and die 11. In the deep forming hole 19, the blank material of the part is drawn into the deep drawing forming hole 19 of the convex and concave die 11 to form a cylindrical part. At this time, the ejector 5 is pushed downward by the lower end of the concave and convex die 11. After dimensioning, the part is sheared and formed through the interaction between the drawing forming hole 19 of the punch and die 11 and the shearing boss 20 on the outer circle of the drawing punch 3, and then the ejector system of the machine tool moves the ejector rod 16 to make the ejector The rod 16 pushes against the ejector 5 to eject the waste from the die 5, and the pull rod 12 pushes downward against the ejector 10 to eject the parts left in the drawing forming hole 19 to complete the drawing and shearing of the parts , Simple structure, easy operation, one-time deep drawing of parts, no need for secondary shearing processing, reducing the manufacturing cost of cylindrical parts and shortening the processing cycle.

The foregoing embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so all equivalent changes made with the contents of the claims of the present invention should be included within the scope of the claims of the present invention .

Claims (3)

1. The mold for one-time deep drawing of cylindrical metal parts has an upper mold (17) and a lower mold (18), and is characterized in that: the lower end surface of the upper mold (17) is provided with an elastic discharge device, A concave-convex mold (11) is provided in the central hole of the elastic unloading device, and the concave-convex mold (11) is fixed on the concave-convex mold fixed plate (13) on the lower end surface of the upper mold (17), and the concave-convex mold (11) is axially The lower end is formed with a drawing forming hole (19), and the upper end surface of the lower die (18) is provided with a drawing punch (3) and a punch fixing plate, and the drawing punch (3) is placed on the punch fixing plate It is fixed on the lower mold (18) through the punch fixing plate, and the upper surface of the punch fixing plate is provided with a part blank, and the part blank is compressed by the elastic unloading device through the downward movement of the upper mold (17). Afterwards, the drawing forming hole (19) cooperates with the upper end of the drawing punch (3) to form a cylindrical part, and the upper die (17) moves down to the center of the concave-convex mold (11) and inserts the concave-convex mold (6). At the hole position, the outer circle of the part blank is cut through the cooperation of the concave and convex die (11) and the concave die (6). The shearing boss (20) on the mold (3) interacts with the lower end of the deep drawing forming hole (19) to shear the part; the elastic unloading device includes a pressing plate (7), a stepped screw (8), a spring ( 9) and the concave-convex mold fixing plate (13), the upper mold (17) is shaped on the step hole I (21) and the through hole (22), the pressure plate (7) is located below the upper mold (17) and has a stepped The lower end of the screw (8) passes through the step hole I (21) and the hole on the concave-convex die fixing plate (13) located at the lower end of the upper die (17) and is screwed and fixed with the screw hole on the pressure plate (7). The spring (9) is set on the stepped screw (8) and the upper and lower ends of the spring (9) placed on the left side of the pressure plate (7) are against the lower end surface of the concave-convex die fixing plate (13) and the upper end surface of the pressure plate (7). The upper end of the spring (9) on the right side of the pressing plate (7) is placed in the hole of the concave-convex die fixing plate (13) and is against the lower end surface of the upper die (17) and the lower end of the spring (9) is against the upper end surface of the pressing plate (7). , the inner wall surface of the center hole of the concave-convex mold fixing plate (13) is limited with a limit groove I (23), and the concave-convex mold (11) is placed in the center hole of the concave-convex mold fixing plate (13) and the pressure plate (7) The limiting boss I (24) inside and made on the upper end of the concave and convex mold (11) cooperates with the limiting groove I (23). The concave and convex mold (11) is axially formed with a central through hole (25) and the center passes through The hole (25) communicates with the drawing forming hole (19), and the pull rod (12) passes through the through hole (22) and the central through hole (25) and is fixed to the top block (10) arranged in the drawing forming hole (19) Connect and push out the formed cylindrical part from the deep-drawing forming hole (19) by moving down of the jack block (10). 2. The mold for one-time deep drawing of cylindrical metal parts according to claim 1, characterized in that: the punch holder comprises a punch holder (4), a spacer (15), a top piece (5) and the die (6), the punch fixing plate (4) is placed on the upper end surface of the lower die (18), and the lower end of the ejector rod (16) passes through the stepped hole II of the punch fixing plate (4) in turn (26) stretches out the lower mold (18) and places it outside after the light hole that is made on the lower mold (18), and the described cushion frame (15) is placed on the upper end surface of the punch fixed plate (4) and the die (6) Place it on the pad (15), and the upper end of the long screw (1) passes through the upper counterbore (27) of the lower die (18), the punch fixing plate (4) and the hole on the pad (15) in sequence It is screwed and fixed with the threaded hole made on the die (6), and the ejector (5) is placed in the center hole of the spacer (15) and the die (6) and passed through the die (6) and the male die (6). The die fixing plate (4) limits the upper and lower strokes of the ejector (5), and the drawing punch (3) is formed with a shear boss (20) and its lower end limits the limit boss II (28) , the drawing punch (3) passes through the center hole of the punch fixing plate (4) and the ejector (5) and then the limiting boss II (28) is made in the center hole of the punch fixing plate (4). The limit groove II (2) at the lower end of the inner wall surface cooperates, and the part blank is placed on the upper end surface of the die (6) and matched with the hole made on the upper left end face of the die (6) through the positioning pin (14) The part blank is positioned and fixed on the die (6). 3. The mold for one-time deep drawing of cylindrical metal parts according to claim 2, characterized in that: the upper mold (17) moves down to the point where the concave-convex mold (11) is inserted into the concave mold (6). When the center hole is located, the outer circle of the part blank is cut through the cooperation of the lower end of the outer peripheral wall of the concave-convex die (11) and the upper wall surface of the center hole of the die (6).