CN212442895U - Punching forming device for long end - Google Patents

Abstract

The application relates to the technical field of extrusion forming, and particularly discloses a long end punch forming device which comprises a lower pressing die driven by a driving mechanism to reciprocate up and down and a female die fixed on a base, wherein a die cavity matched with the lower pressing die is arranged at the center of the female die, two extrusion dies in sliding connection with the female die are arranged on the upper surface of the female die, the two extrusion dies are symmetrically arranged relative to the central line of the die cavity, a sliding groove vertical to the central line of the die cavity is arranged on the female die, and a clamping block embedded into the sliding groove is arranged on each extrusion die; the extrusion die is driven by the cylinder, the female die is provided with a two-position three-way reversing valve connected with the cylinder, when the lower pressing die is matched with the die cavity, the lower pressing die extrudes a valve pull rod of the two-position three-way reversing valve, and the cylinder pushes the two extrusion dies to move relatively. The purpose of this scheme is to improve the shaping precision of long end, the drawing of patterns of the long end of being convenient for simultaneously.

Description

Punching forming device for long end

Technical Field

The utility model relates to an extrusion technical field, concretely relates to stamping forming device of elongated end.

Background

The existing method of the processing and forming process of the circular curling element is to roll up the edge of the plate by flanging and then process the rolled part in a cutting mode, so that the process has the defects of insufficient utilization of small pieces of material, and the circular curling element is not convenient to fix when the edge cutting process is carried out, so the edge cutting process is difficult to carry out, and the operation effect of the process is not satisfactory.

At present, bending die on market, it includes terrace die, left die, right die, die holder, upper die base, the terrace die sets firmly on the upper die base, and the die holder is equipped with the mounting groove that is used for placing left die and right die, and left die and right die are all worn to be equipped with rather than swivelling joint's rotation axis, and the rotation axis both ends are fixed on the cell wall of mounting groove, and the terrace die can carry out circular bending with the shaping fixed slot cooperation of left die, right die in order to carry out the machined part and take shape. However, such a bending die is suitable only for forming a circular tubular workpiece having the same diameter, and it is difficult to ensure forming accuracy when a workpiece having a stepped hole structure inside is required to be formed.

As shown in fig. 4, one end of the long end of the product designed by this company is in a closed circular tube shape, the other end is in a non-closed groove shape, and curvatures of arc-shaped surfaces at both ends are different, so that in order to mold the long end at one time, a stamping die of a molding device needs to be adjusted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stamping forming device of elongated end to improve the shaping precision of elongated end, the drawing of patterns of the elongated end of being convenient for simultaneously.

The long end punch forming device comprises a lower pressing die driven by a driving mechanism to reciprocate up and down and a female die fixed on the base, wherein a die cavity matched with the lower pressing die is arranged at the center of the female die; the upper surface of the female die is provided with two extrusion dies which are in sliding connection with the female die, the two extrusion dies are symmetrically arranged about the central line of the die cavity, the female die is provided with a sliding groove which is vertical to the central line of the die cavity, and the extrusion dies are provided with clamping blocks which are embedded into the sliding groove; the extrusion die is driven by the cylinder, the female die is provided with a two-position three-way reversing valve connected with the cylinder, when the lower pressing die is matched with the die cavity, the lower pressing die extrudes a valve pull rod of the two-position three-way reversing valve, and the cylinder pushes the two extrusion dies to move relatively.

The beneficial effect of this basic scheme lies in:

(1) in this basic scheme, two extrusion die move the back to the middle part of die, and the die cavity that die and two extrusion dies constitute will laminate with the surface of the elongated end after the shaping, and the elongated end after the shaping will be lived in the die cavity parcel completely promptly, and the inner chamber of the elongated end after the shaping will with the surface contact who pushes down the mould to can improve the fashioned precision of elongated end.

(2) After the lower pressing die is matched with the die cavity, the two-position three-way reversing valve can be switched, so that the air cylinder pushes the extrusion die to move towards the middle part of the female die, and the extrusion die is prevented from blocking the lower pressing die from entering the die cavity.

(3) After the long end head is formed, the long end head is sleeved on the lower pressing die; at the moment, the lower pressing die moves upwards, and because the opposite surfaces of the two pressing dies are arc surfaces and the air cylinder can compress, the lower pressing die pushes the two pressing dies to separate towards two sides, so that the long end head is separated from the die cavity.

The first preferred scheme is as follows: as a further optimization of the basic scheme, two parallel sliding grooves are respectively arranged on two sides of the die cavity; each extrusion die is connected with the female die through two sliding grooves, so that the connection relationship between the extrusion die and the female die is more stable.

The preferred scheme II is as follows: as a further optimization of the first preferred scheme, the air cylinder comprises a cylinder body arranged in the female die, the axial direction of the cylinder body is parallel to the sliding chute, and the sliding chute is communicated with the interior of the cylinder body; a piston is arranged in the cylinder body and fixedly connected with a clamping block, and when the clamping block abuts against one side of the sliding groove, which is close to the die cavity, the lower surface of the extrusion die seals the sliding groove; the two-position three-way reversing valve is provided with three interfaces, a first interface of the two-position three-way reversing valve is communicated with an air source, a second interface of the two-position three-way reversing valve is communicated with a cylinder body, a third interface of the two-position three-way reversing valve is communicated with the outside, a valve pull rod is pressed down, the first interface is communicated with the second interface, the valve pull rod resets, and the second interface is communicated with the third interface.

In the preferred scheme II, the cylinder body is arranged in the female die, so that the installation space can be saved; and when the lower pressing die moves upwards slightly, the valve pull rod resets, so that the cylinder body is communicated with the outside, the extrusion die can be separated by easily pushing the extrusion die, and the deformation of the long end head is avoided.

The preferable scheme is three: as a further optimization of the second preferred scheme, a return spring is arranged in the cylinder body and pushes the pushing piston to be far away from the die cavity. By arranging the return spring, the extrusion die can be reset by the return spring after the lower pressing die slightly moves upwards.

The preferable scheme is four: as a further optimization of the preferred scheme three, the gas source is a high-pressure gas tank which is arranged below the female die; so as to supply air to the cylinder.

The preferable scheme is five: as a further optimization of the preferable scheme four, the lower pressing die comprises an L-shaped mounting plate and a die head fixed on the L-shaped mounting plate, the die head comprises a large end and a small end, the large end of the die head is fixed with both the horizontal end and the vertical end of the L-shaped mounting plate, and the small end of the die head is in a cantilever shape. When the die head of the lower die is matched with the die groove, the extrusion force applied to the die head is perpendicular to the axial direction of the die head, so that the large end of the die head is fixed with the horizontal end and the vertical end of the L-shaped mounting plate, the deformation of the die head when the die head is extruded can be reduced, and the service life of the die head is prolonged.

Drawings

FIG. 1 is a front view of a press forming apparatus for elongated tips;

FIG. 2 is a left side view of the lower die;

FIG. 3 is a top view of the elongated tip punch forming apparatus;

fig. 4 is a schematic view of an elongated tip.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a female die 10, a cylinder body 11, a chute 12, a die cavity 13, a return spring 15, an extrusion die 20, a piston 21, a lower pressing die 30, a die head 31, an air box 50 and a valve pull rod 51.

As shown in fig. 1, the press forming device for the long end includes a lower press die 30 driven by a hydraulic cylinder and capable of reciprocating in a vertical direction, a female die 10 disposed below the lower press die 30 and fixed on a base, and an air box 50 disposed below the female die 10; the center of the female die 10 is located in the cavity 13 directly below the lower die 30. As shown in fig. 2, the lower die 30 includes an L-shaped mounting plate and a die head 31 fixed on the L-shaped mounting plate, the die head 31 includes a large end and a small end, the large end of the die head 31 is fixed to both the horizontal end and the vertical end of the L-shaped mounting plate, and the small end of the die head 31 is in a cantilever shape. The lower die 30 is moved downwards and the die head 31 of the lower die 30 will be inserted into the die cavity 13, i.e. the die head 31 will form a fit with the die cavity 13.

As shown in fig. 1 and 3, the upper surface of the female die 10 is provided with two extrusion dies 20 slidably coupled to the female die 10, and the two extrusion dies 20 are symmetrically disposed about the center line of the cavity 13. The female die 10 is provided with a sliding chute 12 vertical to the central line of the die cavity 13, two sides of the die cavity 13 are respectively provided with two parallel sliding chutes 12, and the extrusion die 20 is provided with a fixture block embedded in the sliding chute 12; therefore, the extrusion die 20 can only slide along the sliding groove 12 through the matching of the sliding groove 12 and the fixture block, and the connection stability of the extrusion die 20 and the groove is enhanced. The opposite ends of the two extrusion dies 20 are provided with the large end of the die head 31 and the corresponding circular arc surface.

As shown in fig. 1, a cylinder 11 is arranged in the die 10, the cylinder 11 is axially arranged in parallel with the chute 12, the cylinder 11 is located right below the chute 12, and the chute 12 is communicated with the inside of the cylinder 11; the piston 21 is arranged in the cylinder 11, and the piston 21 and the fixture block are integrally formed, so that the cylinder 11, the piston 21 and the fixture block form a cylinder, and when the piston 21 slides in the cylinder 11, the piston 21 drives the extrusion die 20 to slide on the female die 10. In addition, in order to ensure the airtightness of the cylinder 11, the lower surface of the extrusion die 20 always closes the section from the end of the chute 12 away from the cavity 13 to the block during the sliding of the piston 21 toward the cavity 13.

As shown in fig. 3, a two-position three-way reversing valve connected with one end of the cylinder body 11 far away from the die cavity 13 is fixed on the rear side of the female die 10, the two-position three-way reversing valve is provided with three ports, a first port of the two-position three-way reversing valve is communicated with an air source, a second port of the two-position three-way reversing valve is communicated with the cylinder body 11, and a third port of the two-position three-way reversing valve. The two-position three-way reversing valve is provided with two switching positions, and when the two-position three-way reversing valve is in the first switching position, the first interface is communicated with the second interface; when the two-position three-way reversing valve is in the second switching position, the second interface is communicated with the third interface. In this embodiment, the air source is an air tank 50 disposed below the female die 10, the two-position three-way directional valve is an electromagnetic valve, a valve pull rod 51 is disposed on the electromagnetic valve, and by applying a downward pressure to the valve pull rod 51, that is, by pressing down the valve pull rod 51, the two-position three-way directional valve is switched to a first switching position, so that the cylinder body 11 is communicated with the air tank 50, and the two extrusion dies 20 move relatively; when the pressure on the valve pull rod 51 is released, the valve pull rod 51 will automatically reset, so that the two-position three-way reversing valve will be switched to the second switching position again. In order to enable the two-position three-way reversing valve to be switched to the second switching position, the extrusion die 20 can be automatically reset, a return spring 15 is arranged in the cylinder body 11, the return spring 15 is a tension spring, and two ends of the return spring 15 are respectively fixedly connected with the piston 21 and the bottom of the cylinder body 11.

After the lower pressing die 30 moves downwards and the die cavity 13 is matched, the vertical end of the L-shaped plate of the lower pressing die 30 extrudes the valve pull rod 51, so that the two-position three-way reversing valve is switched to the second switching position, and the cylinder pushes the extrusion die 20 to move towards the middle of the female die 10. In this embodiment, the pressing stroke of the valve stem is set at 2-3 mm. After the long end is formed, the lower pressing die 30 moves upwards, and the opposite surfaces of the two extrusion dies 20 are arc surfaces, and the air cylinder can compress the long end; after the lower pressing die 30 moves upwards for 3 mm, the valve pull rod 51 is reset, the cylinder body 11 is communicated with the outside, the extrusion die 20 is separated towards two sides, and the lower pressing die 30 can drive the long end to move upwards continuously.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (6)

1. Stamping forming device at elongated end, include by actuating mechanism drive up-and-down motion's die and fix the die on the base, the center of die be equipped with die cavity, its characterized in that of die complex down: the upper surface of the female die is provided with two extrusion dies which are in sliding connection with the female die, the two extrusion dies are symmetrically arranged about the central line of the die cavity, the female die is provided with a sliding groove which is vertical to the central line of the die cavity, and the extrusion dies are provided with clamping blocks which are embedded into the sliding groove; the extrusion die is driven by the cylinder, the female die is provided with a two-position three-way reversing valve connected with the cylinder, when the lower pressing die is matched with the die cavity, the lower pressing die extrudes a valve pull rod of the two-position three-way reversing valve, and the cylinder pushes the two extrusion dies to move relatively.

2. The elongated tip impact molding apparatus of claim 1, wherein: two sides of the die cavity are respectively provided with two sliding chutes which are arranged in parallel.

3. The elongated tip impact molding apparatus of claim 2, wherein: the cylinder comprises a cylinder body arranged in the female die, the axial direction of the cylinder body is parallel to the sliding groove, and the sliding groove is communicated with the inside of the cylinder body; a piston is arranged in the cylinder body and fixedly connected with a clamping block, and when the clamping block abuts against one side of the sliding groove, which is close to the die cavity, the lower surface of the extrusion die seals the sliding groove; the two-position three-way reversing valve is provided with three interfaces, a first interface of the two-position three-way reversing valve is communicated with an air source, a second interface of the two-position three-way reversing valve is communicated with a cylinder body, a third interface of the two-position three-way reversing valve is communicated with the outside, a valve pull rod is pressed down, the first interface is communicated with the second interface, the valve pull rod resets, and the second interface is communicated with the third interface.

4. The elongated tip impact molding apparatus of claim 3, wherein: a return spring is arranged in the cylinder body and pushes the pushing piston to be far away from the die cavity.

5. The elongated tip impact molding apparatus of claim 4, wherein: the air source is a high-pressure air box, and the high-pressure air box is arranged below the female die.

6. The elongated tip impact molding apparatus of claim 5, wherein: the lower pressing die comprises an L-shaped mounting plate and a die head fixed on the L-shaped mounting plate, the die head comprises a large end and a small end, the large end of the die head is fixed with the horizontal end and the vertical end of the L-shaped mounting plate, and the small end of the die head is in a cantilever shape.

Images