JPS5844937A - Hot roll forging device for bottomed hollow shell - Google Patents

Abstract

PURPOSE:To perform cupping simply by single process by providing a pair of left and right columns, a guide and a shifting frame and simplifying charging of material, taking out of products and recharging of material. CONSTITUTION:The device consists of a pair of left and right columns A, B a guide 9, and a shifting frame C that can go and back along the guide 9. The column A has a turning mount 2 of a mandrel 4 that projects toward the shifting frame C. The column B is provided with a hydraulic cylinder 16 used to press a push rod 17 facing the end face of the mandrel 4 and the second hydraulic cylinder 14 that performs positioning of the shifting frame C. Above-mentioned shifting frame C holds a roll housing 21 allowing free rotation at a position where the mandrel 4 is intruded inside, and at the same time, provided with a motor that rotates the housing 21.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot rotary forging device for a hollow body shell with a bottom (hereinafter referred to as a cup).

This type of cup is usually made by pressing a block-shaped material with a round or square cross section under red heat to transform it into a short cup shape, unless it is a thin-walled short product that is conventionally subjected to drawing or similar cold working using plate material. After the process, drawing with a die or stretching with a roll must be performed, and therefore, the production of a long cup has the disadvantage of requiring at least two or more steps.

Therefore, this invention makes it possible to advantageously and easily process hot cups using the block-shaped material in a single process.
The purpose is to disclose the development results regarding.

In this invention, the block-shaped material is pressed against the end face of the mandrel with the thrust of a hydraulic cylinder, and the material is rotated by effective rotary forging using a plurality of piercer rolls. It is possible to easily and efficiently process a long cup within a range of The following configuration is indispensable, taking into consideration that handling convenience can be ensured by simplifying the procedure of loading the strip-shaped material, removing the stretched product through deformation processing, and reloading the material. do.

That is, the cup hot forging apparatus according to the present invention mainly includes a moving frame that is reciprocally movable between a pair of left and right columns, a guide extending between these columns, and an advancing position and a retreating position along the guide. In addition, one column has a turning mechanism for the mandrel μ that projects toward the moving frame, and the other column has a hydraulic cylinder for pressurizing the bushing rod facing the end face of the mandrel and the above-mentioned part of the moving frame. The second one that controls each positioning
0 hydraulic pressure cylinder, and the movable frame controls the rotation and revolution of a plurality of piercer rolls that form a shallow inclination angle with the axis of the mandrel around the mandrel in the advanced operation position where the mandrel is inserted into the movable frame. It is essential to have a bearing that holds the rolling roll housing, and a motor that rotationally drives the roll housing.

The specific development of this configuration will be described below with reference to the drawings.

In FIG. 1, A and B are a pair of left and right columns, and C is a moving frame that occupies an evacuation and evacuation position. The one on the left? The system A is rotatably mounted on a mandrel stand L with a gear 3 fixed to its lower part. To make a container by removing a cup product that has been processed. 5 is a turning pinion 6 is a turning motor. Reference numeral 7 denotes a restraining member for the turning mount 2, and 8 is a lubricant pumping bonder which always sends lubricant to the tip of the mandrel 4 in the operating position.

The stays 9 that span between columns AB are one on top and two on the bottom.
Both columns A and B are connected by a tightening nut 10, which also serves as a guide for the reciprocating movement of the moving frame.

On the right column B, the positioning cylinder 14 of the moving frame C is attached to the stand 18, and the positioning cylinder 1 is mounted on the stand 18.
Although the piston rod 15 of No. 4 is not shown, the moving frame C
The movable frame C is fixed to the ear part of the frame C, and the movable frame C is advanced from the evacuation and evacuation position shown in the figure toward the advance operating position, which will be described later with reference to FIG. 8, to secure that position.

Another hydraulic cylinder 16 is attached to the stand 18, and the bushing rod 1 is mounted in the above-mentioned advanced operating position.
It serves to push the material M towards the mandrel/L/4 through the hole 7. Reference numeral 18 denotes a recess 19 in the pressurizing end surface of the bushing rod 17, which is a bushing for introducing the material M provided on the moving frame C.

The movable frame C is divided into two parts and is connected to a 7-way 20, and a roll housing 21 is rotatably held inside with bearings 22. The piercer roll 24 is rotatably held by a shaft 25 that forms a shallow inclination angle with respect to the axis of the mandrel 4, and the piercer roll 24 is made up of a tapered part of a small diameter part and a part of a large diameter part, preferably in the middle as shown in FIG. It should be divided into at least two parts so that they can rotate freely relative to each other.

A tapered ring 26 is removably adapted to the opening of the tapered roll housing that opens around the mandrel 4, and plays the role of holding the mandrel 4 concentrically at the initial stage of operation. Further, 27 is a reservoir for roll cooling water surrounding the outer periphery of the housing 21, and 28 is a water supply pipe.

In FIG. 2, 26 is a pinion, 80 is a drive motor, and the roll housing 21 is engaged with the gear 21B carved on the outer periphery of the roll housing 21 and the pinion 29.
Rotate and drive.

For rotary forging of the cup, the moving frame C is moved to the right by the positioning cylinder 14, and the axis of the mandrel/I/4 is aligned with the axis of the moving frame C and the bushing rod 17 at the evacuation position shown in Fig. 1. Next, move the moving frame C to the left, and while leaving the bushing rod I7, insert the mandre/L/4 into the roll housing 21 through the taper ring 26, and insert it into the front of the bushing rod 17 between it and the bushing 19. There is now room for the material M to be inserted into the introduction bushing 19, and then the bushing rod 17 is advanced to occupy the position shown in FIG. 8.

At this time, the piercer roll 24 is revolving due to the rotational drive of the roll housing 21, and is in a state of planetary rotation to freely stretch out the material M in the radial direction, which is about to protrude to the outer periphery due to the continued advancement of the bushing rod 17. Rotary forging is performed with the piercer mouth -/l/24 pressed and fully aligned with the mandrel/l/4.

By dividing this Pier Throw/I/24 into two parts as shown in Fig. 4, the difference in outer circumferential speed is not so large, so the presser foot is not strained.

The forward movement of the bushing rod 17 continues to reach the position shown in FIG. 5, and by pulling back the sheep's rear moving frame C to the right, rotary forging is continued on a small unprocessed remaining portion of the material M. The first step is completed by pressing the mandre /L/4 onto the mandrel /L/4 and then turning the mandre /L/4 around at step 9 to return the movable frame C to its original position, leaving the manufactured material M behind.

The cup 1M thus completed is turned from the mandre/L/4 to the mounting base 2. Remove it by pulling it out at the rotating position.

As described above, according to the present invention, it has become possible to produce a seamless, relatively long, thick-walled cup in a single process by simple rotary forging.

[Brief explanation of drawings]

Fig. 1 is a front view showing a part of the cup rotary forging device of the present invention in cross section. Fig. 2 is a side view as seen from the right side. Fig. 3 is a sectional view of the roll housing when material is being charged. state at the start of forging work,
FIG. 4 is a detailed view of the piercer roll, and FIG. 5 is a sectional view of the housing at the final stage of forging.

Claims (1)

[Claims] (1) The device mainly consists of a pair of left and right columns, a guide extending between these columns, and a moving frame that is movable back and forth between an advancing position and an evacuation position along an ID. , one column has a mandrel turning mount projecting toward the moving frame, and the other column controls the above-mentioned positioning of the moving frame and a hydraulic cylinder for pressurizing the bushing rod facing the end face of the mandrel. The mandrel is inserted into the movable frame, and a plurality of piercer rolls that form a shallow inclination angle with the axis of the mandrel rotate and revolve around the mandrel at a light advancing operating position. A hot rotary forging device for a hollow shell with a bottom (2), characterized in that a bearing holds a roll housing that controls the roll housing, and a motor that rotationally drives the roll housing (2). The device (8) according to 11), which has a large-diameter lead-out part and a tapered part that connects the lead-out part, and is divided into at least two parts in the direction of the axis through each part, and is capable of mutually independent rotational movement. A tapered ring that controls concentricity of the mandrel in the initial stage of operation can be removably fitted into the tapered opening that opens facing the car mandrel (
The apparatus described in 1) or (2) (4)\, the movable frame is provided with a hot material introduction pull-on on the bushing rod side (11 The apparatus described in (2) or (8)