CN202087753U - Forging forming device for thick-wall conical hollow pipe - Google Patents

Abstract

The utility model relates to a forging forming device of thick wall toper hollow tube, including upper die base, die holder and guide post, the bottom of upper die base be equipped with conical last arc wall, the top on the die holder is equipped with the lower arc wall the same with last arc wall tapering, the groove depth H2 of lower arc wall on the die holder is 1.5 ~ 2 times of the groove depth H1 of the last arc wall of upper die base, the guide post more than two at least is fixed on the die holder, and each guiding hole suit on the upper die base is on each guide post and can relative movement. The utility model discloses can reduction in production cost, improve the toper hollow tube and make the product rate.

Description

Forging and forming device for thick-walled conical hollow tube

technical field

The utility model relates to a forging and forming device for a thick-walled tapered hollow pipe, which belongs to the technical field of tapered hollow pipe manufacturing of seamless steel pipes. the

Background technique

Most of the tapered hollow tubes are made of seamless hollow tubes through a stamping die through extrusion deformation, and the stamping die consists of an upper die mechanism and a lower die mechanism. The upper die mechanism is connected to the pressure head of the press, and the lower die mechanism The mold mechanism is installed on the workbench of the press, and the upper mold mechanism is provided with a support column for supporting the small port of the tapered hollow tube and a cone located on the outer periphery of the support column to squeeze the hollow tube to make it plastically deformed. The lower die mechanism is equipped with a lower clamping seat for clamping and positioning the hollow tube, and the hollow tube is clamped on the lower clamping seat. When the upper die mechanism moves down with the pressure head of the press, it passes through the tapered punch. Extruding the hollow tube causes plastic deformation to form a tapered hollow tube. Therefore, the tapered hollow tube produced by cold stamping to achieve the necking deformation process of the hollow tube has the advantages of high production efficiency and low manufacturing cost. However, the stamping process can only be used for hollow tubes with relatively thin walls, but for thick-walled hollow tubes, if the tapered hollow tube is made by stamping with a stamping die, a large stamping force is required to make the hollow tube The wall is plastically deformed to achieve the required tapered hollow tube, but too much forming pressure of cold stamping will cause the wall of the hollow tube to be cracked or the surface will be wrinkled and scrapped, which will greatly reduce the yield of the product. Therefore, cold stamping is used It is not suitable for making tapered hollow tubes. At present, there are also tapered hollow tubes processed by turning, but this processing method requires a certain machining allowance for the wall thickness of the hollow tube, which not only has a large amount of machining, but also reduces the utilization rate of materials, resulting in high production costs. . the

Contents of the invention

The purpose of the utility model is to provide a forging and forming device for a thick-walled conical hollow tube which reduces production costs and improves the yield. the

The technical scheme of the utility model to achieve the above object is: a forging and forming device for a thick-walled conical hollow tube, which is characterized in that it includes an upper mold base, a lower mold base and a guide column, and the bottom of the upper mold base is set There is a tapered upper arc-shaped groove, and the top of the lower mold base is provided with a lower arc-shaped groove with the same taper as the upper arc-shaped groove. The groove depth H2 of the lower arc-shaped groove on the lower mold base is the upper arc of the upper mold base. The groove depth H1 of the shaped groove is 1.5 to 2 times, at least two or more guide columns are fixed on the lower mold base, and each guide hole on the upper mold base is sleeved on each guide column and can move relatively. the

The forging forming device of the thick-walled conical hollow tube of the utility model adopts an upper mold base with a conical upper arc-shaped groove and a lower mold base with a tapered lower arc-shaped groove, so the thick-walled hollow tube is placed on the upper mold base. The arc-shaped groove and the lower arc-shaped groove of the lower mold base are forged, and the hollow tube is extruded through the tapered upper arc-shaped groove and the lower arc-shaped groove to make the metal material plastically deformed to form a tapered hollow tube. It solves the phenomenon that the wall of the thick-walled hollow tube is broken or the surface is wrinkled during cold stamping. Since the wall thickness of the hollow tube is not limited, it is suitable for the production of tapered hollow tubes of different thicknesses. In the utility model, the groove depth H2 of the lower arc-shaped groove is designed to be 1.5 to 2 times of the groove depth H1 of the upper arc-shaped groove, which not only facilitates placing the hollow tube in the lower arc-shaped groove, but also effectively prevents the hollow It jumps out from the lower mold seat during punching, which can improve the safety of operation. When the upper mold base of the utility model moves up and down, the upper mold base is guided by the guide column, so the upper mold base can only move up and down without deviation, which can ensure that the tapered hollow tube will not be deformed and formed. The size and shape tolerance of the tapered hollow tube fully meet the design requirements, which can not only improve the yield, but also reduce the manufacturing cost.

Description of drawings

Embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings. the

Fig. 1 is a structural schematic diagram of a tapered tube forging forming device of the present invention. the

Fig. 2 is a cross-sectional structure diagram of A-A in Fig. 1 . the

Among them: 1-upper mold base, 11-upper dovetail, 12-upper arc groove, 2-guide column, 3-lower mold base, 31-lower dovetail, 32-lower arc groove, 4-hollow tube, 5- clamp. the

Detailed ways

As shown in Figures 1 to 2, the forging and forming device of the thick-walled conical hollow tube of the present invention includes an upper mold base 1, a lower mold base 3 and a guide column 2, and the bottom of the upper mold base 1 is provided with a conical upper Arc-shaped groove 12, the top of the lower mold base 3 is provided with a lower arc-shaped groove 32 with the same taper as the upper arc-shaped groove 12, as shown in Figures 1-2, when the upper mold base 1 and the lower mold base 3 are fastened together , the upper arc-shaped groove 12 and the lower arc-shaped groove 32 constitute a flat tapered hole, and the groove depth H2 of the lower arc-shaped groove 32 on the lower mold base 3 is equal to the groove depth H1 of the upper arc-shaped groove 12 of the upper mold base 1 1.5 to 2 times, at least two guide columns 2 are fixed on the lower mold base 3, four guide columns 2 can be set around the lower mold base 3, each guide hole of the upper mold base 1 is set on each guide column 2 And can move relatively, make the upper mold base 1 can only move up and down through the guide column 2, but can not be offset. As shown in Figure 1, the upper part of the upper die base 1 of the utility model is provided with an upper dovetail 11 or an upper dovetail groove, which can be connected with the dovetail groove or dovetail on the forging hammer, so that the upper die base 1 can be connected to the forging hammer conveniently. The mold base 1 moves up and down with the forging hammer to forge the hollow tube 4, and the lower part of the lower mold base 3 is provided with a lower dovetail 31 or a lower dovetail groove, which can be connected with the dovetail groove or dovetail on the workbench, so that the lower mold base 3 Attached to the workbench. the

As shown in Figure 2, when the utility model is working, the hollow tube 4 heated to the forging temperature is clamped by the clamp 5, and the hollow tube 4 rotates continuously in the lower arc groove 32 on the lower mold base 3. The forging hammer drives the upper die base 1 to reciprocate up and down, and deforms the hollow tube 4 through the upper arc-shaped groove 12 on the upper die base 1 and the lower arc-shaped groove 32 on the lower die base 3 until the hollow tube 4 is deformed into the desired shape. tapered hollow tube. the

Claims (2)

1. the forging and molding device of a heavy wall taper hollow pipe, it is characterized in that: comprise upper bolster (1), die shoe (3) and lead (2), the bottom of described upper bolster (1) is provided with the last deep-slotted chip breaker (12) of taper, top on the die shoe (3) is provided with the arc lower groove (32) identical with last deep-slotted chip breaker (12) tapering, the groove depth H2 of the arc lower groove (32) on the die shoe (3) is 1.5～2 times of groove depth H1 of the last deep-slotted chip breaker (12) of upper bolster (1), at least plural lead (2) is fixed on the die shoe (3), and each pilot hole on the upper bolster (1) is sleeved on, and each lead (2) is last also to relatively move.

2. want the forging and molding device of 1 described heavy wall taper hollow pipe according to right, it is characterized in that: the top of described upper bolster (1) is provided with dovetail (11) or goes up dovetail groove, and the bottom of die shoe (3) is provided with down dovetail (31) or following dovetail groove.

Images