CN108188215A - A kind of sheet material bending mould - Google Patents

Abstract

The invention discloses a plate bending die, which comprises an upper die base (1), a lower die base (2), a punch (3), a die (4), a retaining pin (5), a material return device and auxiliary positioning device, punch (3) and die (4) are respectively installed on the upper die base (1) and the lower die base (2) of machine tool, die (4) is provided with U-shaped groove, punch (3) There is a bump matching the U-shaped groove; the stop pin (5) is set on the left side of the U-shaped groove; the material ejection device is set at the bottom of the U-shaped groove; at least one auxiliary positioning device is set on the U-shaped groove Right. The invention can carry out one-time stamping and integral molding of the plate, and has high and simple positioning accuracy and convenient unloading.

Description

A sheet metal bending die

technical field

The invention relates to a mold, in particular to a plate bending mold, which belongs to the technical field of plate forming molds.

Background technique

In today's production and life, various formed plates are needed in various occasions, and the forming quality of the plates has an important impact on production and life. The bending and forming of the plate needs to be realized by the bending mold. The plate shown in Figure 1 is one of the commonly used shapes of the plate. The existing molds for the bending and forming of the plate shown in Figure 1 are divided into three times. The bending step is to carry out the bending and finally forming. The bending efficiency is low, the cost is high and the precision is not high; The formed mold has important production significance.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a sheet material bending die, which can perform one-time stamping and integral forming of the sheet material, and has high and simple positioning accuracy and convenient unloading. The invention has high bending efficiency, low cost and good practicability.

In order to achieve the above object, the technical solution of the present invention is: a plate bending die, including an upper mold base, a lower mold base, a punch and a die, and also includes a stop pin, a material return device and an auxiliary positioning device. The punch is installed on the upper die base of the machine tool, and the die is installed on the lower die base of the machine tool. The upper surface of the die is provided with U-shaped grooves in the front and rear directions, and the lower surface of the punch is provided with U-shaped grooves corresponding to the U-shaped grooves. Cooperating bumps; at least two of the stop pins are arranged on the upper surface of the boss on the left side of the U-shaped groove, and the stop pins are located on the same straight line parallel to the U-shaped groove; at least one of the said return devices It is located at the bottom of the U-shaped groove, including the ejection bolt, the spring one and the seat plate. The ejection bolt is in an inverted T shape, and its upper end passes through the inverted T-shaped hole in the upper and lower directions matched with the bottom of the U-shaped groove and the gap between the lower end and the The upper end of the spring contacts and cooperates, and the lower end of the spring contacts and cooperates with the seat plate installed in the hole at the bottom of the die; at least one of the auxiliary positioning devices is arranged on the upper surface of the boss on the right side of the U-shaped groove, including positioning columns and Spring 2, the lower end of the positioning column is placed in the blind hole that fits with the gap, the second spring is located between the lower end of the positioning column and the bottom of the blind hole, the upper end of the positioning column is a bottom-up oblique section from right to left, and the oblique section The rightmost end is lower than the die upper surface.

Further, the mold also includes an adjusting screw, and the boss part on the right side of the U-shaped groove of the die is slidably connected with the lower part of the die in the left and right direction, and the adjusting screw is installed in the lower part of the die in the left and right direction. At the joint with the boss on the right side of the U-shaped groove, the adjusting screw forms a rotating pair with the lower part of the die, and forms a thread pair with the boss on the right side of the U-shaped groove.

Further, the number of the adjusting screws is 2.

In the present invention, a U-shaped groove is provided on the upper surface of the die to realize the one-time stamping integral molding of the U-shaped plate; a stop pin and an auxiliary positioning device are arranged on the die to realize high positioning accuracy and simple positioning; The bottom is equipped with a material ejection device, which realizes no material jam after forming and convenient material unloading. The invention has high bending efficiency, low cost and good practicability.

Description of drawings

Fig. 1 is the sheet material processed by the present invention.

Fig. 2 is a front view of the present invention.

Figure 3 is a top view of the present invention.

In the figure: 1. Upper die holder, 2. Lower die holder, 3. Punch die, 4. Die die, 5. Stop pin, 6. Rejecting bolt, 7. Spring one, 8. Seat plate, 9. Positioning column , 10, spring two, 11, adjusting screw rod.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing (the left-right direction, up-down direction and front-back direction in the following description are identical with the left-right direction, up-down direction and front-back direction in Fig. 2, just convenient description definition, do not limit the scope of protection of this patent) .

As shown in Figure 2 and Figure 3, a plate bending die includes an upper mold base 1, a lower mold base 2, a punch 3 and a die 4, and also includes a stop pin 5, a material return device and an auxiliary positioning device. The punch 3 described above is installed on the upper die base 1 of the machine tool, and the die 4 is installed on the lower die base 2 of the machine tool. There are bumps matched with the U-shaped groove; at least two of the stop pins 5 are arranged on the upper surface of the left boss of the U-shaped groove, and the stop pins 5 are located on the same straight line parallel to the U-shaped groove Above; at least one of the material ejection devices is located at the bottom of the U-shaped groove, including the material ejection bolt 6, the spring 1 7 and the seat plate 8, the ejection bolt 6 is in an inverted T shape, and its upper end passes through the bottom of the U-shaped groove The inverted T-shaped hole in the up-and-down direction matched with its clearance, the lower end is in contact with the upper end of the spring one 7, and the lower end of the spring one 7 is in contact with the seat plate 8 installed in the hole at the bottom of the die 4; at least one of the auxiliary positioning devices is provided On the upper surface of the boss on the right side of the U-shaped groove, it includes a positioning post 9 and a spring two 10. The lower end of the positioning post 9 is placed in a blind hole that fits with the gap, and the spring two 10 is located at the lower end of the positioning post 9 and the blind hole. Between the bottom, the upper end of the positioning column 9 is a bottom-up oblique section from right to left, and the rightmost end of the oblique section is lower than the die 4 upper surface.

The mold also includes an adjusting screw 11, the right side boss of the U-shaped groove of the die 4 is slidingly connected with the lower part of the die 4 in the left and right directions, and the adjusting screw 11 is installed on the die in a left and right direction. 4 bottom and U-shaped groove right side boss joint, adjusting screw rod 11 and die 4 bottoms form rotating pair, and form thread pair with U-shaped groove right side boss. When the adjusting screw 11 is rotated, the boss part on the right side of the U-shaped groove will slide left and right relative to the lower part of the die 4, so that the size of the U-shaped groove can be adjusted according to actual needs (while replacing the matching punch), and the same Adjust the accuracy of the U-shaped groove at any time when the size of the plate is large, so as to avoid excessive use, and the size of the U-shaped groove will become larger, which will affect the processing accuracy.

The quantity of the adjusting screw 11 is 2, too many, waste of cost, too little, unable to form effective positioning and locking.

The working principle of the present invention: when working, feed from right to left, when the plate passes through the auxiliary positioning device, the positioning column 9 moves downward under the gravity of the plate, causing the spring 210 to compress, and after the plate passes through the positioning column 9 completely, the positioning column 9 moves upward against the positioning column 9 under the restoring force of the spring 2 10. At this time, the sheet is positioned and fixed by the stop pin 5 and the positioning column 9. The machine tool drives the punch 3 to bend the sheet downward and then retracts upward. After being compressed, the spring one 7 returns to its original shape, and drives the ejector bolt 6 to move upward to push out the formed plate, so as to facilitate unloading. The invention has high bending efficiency, low cost and good practicability.

Claims (3)

1. A plate bending die, comprising an upper mold base (1), a lower mold base (2), a punch (3) and a die (4), is characterized in that: also includes a retaining pin (5), a material return device and auxiliary positioning device, the punch (3) is installed on the upper die base (1) of the lathe, the die (4) is installed on the lower die base (2) of the machine tool, and the die (4) upper surface There are U-shaped grooves in the front and rear directions, and the lower surface of the punch (3) is provided with a bump that matches the U-shaped groove; at least two of the stop pins (5) are located on the left side of the U-shaped groove. On the upper surface of the side boss, the retaining pin (5) is located on the same straight line parallel to the U-shaped groove; at least one of the stripping devices is located at the bottom of the U-shaped groove, including the stripping bolt (6), spring One (7) and the seat plate (8), the ejector bolt (6) is an inverted T-shaped, its upper end passes through the inverted T-shaped hole in the upper and lower directions of the U-shaped groove bottom and its clearance, and the lower end and the spring one (7) The upper end is in contact and fit, and the lower end of spring one (7) is in contact with the seat plate (8) installed at the bottom opening of the die (4); at least one of the auxiliary positioning devices is arranged on the right side of the U-shaped groove. On the surface, it includes the positioning post (9) and the second spring (10). The lower end of the positioning post (9) is placed in a blind hole that fits with the clearance, and the second spring (10) is arranged at the lower end of the positioning post (9) and the bottom of the blind hole. Between, the upper end of positioning column (9) is from bottom to top oblique section from right to left, and the rightmost end of oblique section is lower than die (4) upper surface. 2. A plate bending die according to claim 1, characterized in that: the die also includes an adjusting screw (11), and the boss portion on the right side of the U-shaped groove of the die (4) Slidingly connected with the lower part of the die (4) in the left and right direction, the adjusting screw (11) is installed in the left and right direction at the connection between the lower part of the die (4) and the boss on the right side of the U-shaped groove, the adjusting screw (11) and the concave The bottom of the mold (4) forms a revolving pair, and forms a threaded pair with the boss on the right side of the U-shaped groove. 3. A plate bending die according to claim 1 or 2, characterized in that: the number of said adjusting screws (11) is two.