JPS5825833A - Ring rolling mill - Google Patents

Abstract

PURPOSE:To prevent coming down of a mandrel due to reaction from material acting on the mandrel by incorporating a pair of back-up rollers allowing rotation in a slide table of a ring rolling mill. CONSTITUTION:A pair of back-up rollers 70 are incorporated in each slide table 30 allowing rotation, and abutted to both side 63b of lower end back of a mandrel 63 lying at the advance end to receive reaction force from a work W0 acting on the mandrel 63. The back-up rolles are mounted to a bracket 75 with a pin 74 together with a bearing 71, a labyrinth collar 72 and a collar 73. The bracket 75 is placed on a check plate 76 fixed to the slide table 30 and fixed to the slide table 30 with a wedge 78 and a clamp rod 79. By this way, entrance of foreign matters between the mandrel 63 and each back-up roller 70 and coming down of the mandrel 63 can be prevented and accuracy of working can be raised.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ring rolling mill device, in particular, a main roller that is installed on a bed so as to be rotatable in a horizontal state, and a main roller that is installed on the bed so that it can move forward and backward toward the main roller. A slide table, a spindle body attached to a column vertically disposed on the slide table so as to be movable toward the slide table, and a mandrel attached to the spindle body so as to be rotatable in a suspended state. By rotating the main roller, moving the slide table forward toward the main roller, and moving the spindle main body and mandrel forward toward the slide table, the inner diameter side of the annular material placed on the slide table is The present invention relates to a ring rolling mill device that presses the outer diameter side of the material into contact with the main roller by bringing the middle part of a mandrel into contact with the main roller, thereby turning a small diameter, thick material into a large diameter, thin product.

The ring rolling mill device of the above type is used, for example, to manufacture intermediate products (semi-finished products before gear cutting, commonly known as ring blanks) of various differential ring gears. However, in the above type of ring rolling mill equipment, a large reaction force acts on the hanging mandrel from the material during processing, so it is necessary to support the lower end of the mandrel with a support member to receive the reaction force. . By the way, conventionally, as the above-mentioned support member, a support member is used which has a support hole into which the lower end of the mandrel is fitted and is rotatably assembled to the slide table. Therefore, foreign matter (scale peeled off from the material during processing, etc.) may enter the support hole, and the lower end of the mandrel may not be supported reliably.

The present invention has been made to solve this problem, and one embodiment thereof will be described below with reference to the drawings.

Figure 1 shows a hot ring rolling mill device 1 that uses heated gear material (hereinafter referred to as work) Wo as an intermediate gear product.
00 is shown. This ring rolling mill equipment 10
0, the main roller 2 is placed at the upper center of the bed 10.
0 is rotatably assembled in a horizontal state, and a pair of slide tapes/1z30.3 are installed on both sides of this main roller 20.
0 is placed. The main roller 20 is rotationally driven by a drive motor (not shown). Each slide tape /l/30 is assembled on the bed 10 so as to be able to advance and retreat (move left and right) toward the main roller 20, and is moved forward and backward by a hydraulic cylinder 31. A column 40 is vertically installed on each slide table 60, and a workpiece unloading device 50 is attached to the column 40, and the main spindle body 60 is attached so that it can move forward and backward (up and down) toward the slide tape z+/30. It is being Each spindle main body 60 is moved forward and backward by a hydraulic cylinder 61, and a workpiece W for machining is placed at the bottom.

A pair of guide rollers 6 (only one is shown in the figure) guide the movement on the slide tape/l/30.
2 is rotatably assembled, and the mandre/L/
66 is rotatably assembled in a suspended state. Note that the positioning of each slide tape) v30 at the forward end is performed by each stopper mechanism 32 provided on the ped 10, and the positioning of each spindle main body 60 at the forward end is determined by each slide tape /L'! This is done by a stopper (not shown) provided at 10.

In the ring rolling mill apparatus 100 having such a configuration, the main roller 20 is rotated by an electric motor, and each heated workpiece WO is automatically carried onto each slide tape/l/30 as shown in the figure by a carrying device (not shown). let me,
Each slide tape/I/30 is advanced toward the main roller 20 by each hydraulic cylinder 31, and each main shaft body 60.
By advancing the guide roller 62 and the mandrel (v63) toward each slide tape zlz30 with each hydraulic cylinder 61, each work W. Each cloak L on the inner diameter side of
//Make the middle part 63& of V63 contact each workpiece W°0
By pressing the outer diameter side of the main roller 20' in contact with the main roller 20', each small-diameter, thick-walled workpiece Wo can be made into a large-diameter, thin-walled gear intermediate product. In this case, the left and right works Wo can be made into gear intermediate products alternately or simultaneously. In addition, gear intermediate products include each slide tape/L'30 and each main shaft body 60. Guide roller 62 and mandre/L'61
After returning to the original position shown in the figure, each workpiece unloading device 50
It is automatically carried out from above each slide tape /l/30.

In this ring rolling mill apparatus 100, as shown in FIGS. 2 and 3, each slide tape/l/30 has a pair of backup rollers 70.7.
0 is rotatably assembled.

Each backup roller 70 is connected to a mandrel at the forward end.
Workpiece W that comes into contact with both sides 63b, 63b of the lower back end of L'63 and acts on mandre/l/63. A pair of upper and lower bearings 71, 71 and labyrinth collars 72, 72 (preventing cooling water used in this ring rolling mill device 100 from entering the bearings 71), It is also attached to a bracket 75 together with a collar 73 via a pin 74 . The bracket 75 is placed on a first stop plate 76 fixed to the slide tape/l/30, and is slid by a wedge 7B that is moved up and down by a port 77 and a clamp rod 79 that is moved to the right by the upward movement of the wedge 7B. It is fixed to the table 30. A workpiece receiving plate 33 is provided on the bracket 75, and the workpiece receiving plate 33 is fixed to a slide tape/l'30.

This ring rolling mill device 100 is configured as described above so that the reaction force from the workpiece Wo acting on the mandrel/l/63 is received by both back and up rows 570.70. It is almost impossible for foreign matter to enter between /I/63 and each backup roller 70, and the lower end of the mandrel 63 is reliably supported to prevent the mandrel IL/63 from falling down.
63 can be protected and the precision of processing can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a ring rolling mill apparatus according to the present invention; FIG. 3 is a partially cutaway plan view taken along the line T in FIG. 2; Explanation of symbols 100...Ring rolling milling device, 10...
Bed, 20...Main roller, 3o...Slide table, 40...Column, 60...Spindle body, 6
3...Mandrel/L/, 63B...Middle part of mandrel, 63b. 6 '3 b...Both sides of the lower end of the mandrel, 70
, 70...Backup roller. (7 others) Figure 2 Fn tI/E3 m

Claims (1)

[Claims] A main roller is mounted on the bed so as to be rotatable in a horizontal state, a slide table is mounted on the bed so as to be movable toward the main roller, and a column vertically attached to the slide table is mounted on the slide table. The main roller is rotated and the slide tape ρ is directed toward the main roller by comprising a main shaft body assembled so as to be movable forward and backward toward the main shaft, and a mandrel μ rotatably assembled to the main shaft body in a suspended state. The spindle main body and the mandrel are moved forward toward the slide table, so that the intermediate part of the mandrel is brought into contact with the inner diameter side of the annular material placed on the slide table, and the outer diameter of the material is adjusted. In a ring rolling mill device that processes a small-diameter, thick-walled material into a large-diameter, thin-walled product by contacting and pressurizing the side of the main roller with the main roller, the lower end back of the mandrel ρ at the forward end comes into contact with both sides of the mandrel and acts on the mandrel. A ring rolling mill device characterized in that a pair of backup rollers that receive a reaction force from the raw material are rotatably assembled to the slide table.