JPS5834734A - Lathe - Google Patents

Abstract

PURPOSE:To permit the cutting process by a cutting tool and the thread rolling process by knurling tools to be performed at a time in one process by installing a plurality of knurling tools and a cutting tool on a tool rest. CONSTITUTION:A pair of knurling tools 5 and 6 and a cutting tool 7 are installed on the tool rest 4 which travles freely in reciprocation along the rod 1 to be worked. In working, a cylinder 13 is driven to extend a piston rod 16, and the swing members 23 and 24 are swung around pins 27 and 28 by swinging levers 21 and 22, and knurling tools 5 and 6 which are supported on the swing members 23 and 24 are pressed onto the rod 1 to be worked. When the tool rest 4 is traveled in this state, the cutting tool 7 arranged ahead of the knurling tools 5 and 6 performs cutting process, and then knurling tools 5 and 6 perform knurling work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an IM gong for rounding a die, particularly for elongating and knurling a workpiece.

Conventionally, when knurling a workpiece, the outer part of the workpiece is first cut with a cutting tool.
The rolling process was carried out by removing the t-roll and then placing the knurling at a position relative to the melting point of the bar to be processed.

Therefore, two steps, a cutting step using a cutting tool and a rolling step using a knurling tool, are required, which is troublesome and has low work efficiency.

The present invention aims to solve the above-mentioned technical problems and provide a lathe that can complete knurling in one step and improve work efficiency.

Hereinafter, the present invention will be explained in detail based on the - aspect.

Figure i1 is a perspective view showing a part of a lathe according to an embodiment of the present invention. The machining rod is held between the tailstock 2 and the headstock 3. A pair of knurls 5.6 and a cutting tool 7 are provided on the tool rest 4, which is movable back and forth along the held workpiece rod IK.

When knurling, the tool rest 4 should be
From there, the workpiece rod 1 is sent to the headstock 3 as shown by the arrow 8, and the workpiece rod 1 is rotated around the set IIIf1. As a result, the outer surface of the rod 1 to be processed is cut by the cutting tool 7 and rolled by the double-ended ret 5.6. Therefore, the workpiece rod l is knurled by one feeding operation of the tool rest 4 in the direction of arrow 8. In addition,
The workpiece rod l after knurling is used, for example, as a toner replenishing roller of a developing device in an electrostatic handling machine.

FIG. 2 is a plan view showing the vicinity of the tool rest 4 in FIG. 1, and FIG. 3 is a sectional view taken from the section line l1l-1ll in FIG. 2. The tool rest 4 has a support s9 placed on one side of the workpiece rod l, and a support part l placed on the other side of the workpiece rod l.
O, and both supports 9 below the workpiece rod l. The connecting portion ii connects the lower part of the lO, and the connecting portion ii is formed into a substantially U-shape. A pair of knurls 5.6 are provided in connection with one of the supports 9, and a cutting tool 7 is fixed to the other support slO.

At the upper part of the support part 9, a support arm 12 is provided outwardly along the half Katsura gyrus of the workpiece extension 1.

A pneumatic cylinder 13 serving as a driving means is supported at the free end of the support arm 12. This cylinder 13 is a single sea bream rod 2 movable cylinder having an axis i' perpendicular to the @ line of the general processing extension 1. - When compressed air is supplied from one pneumatic supply pipe 14 and air is released from the other pneumatic supply pipe 15,
The piston rod 16 extends toward the workpiece 4IIll. Further, when all the compressed air is supplied from the other pneumatic supply pipe 15 and air is released from the second pneumatic supply pipe 14, the piston rod 16 contracts in the direction away from the work piece.

A guide hole 17 is formed in the middle of the support 12 and extends in the radial direction of the rod 1 to be processed. The tip of the piston rod 16 is connected to a holding member 19.20 that holds the knurling 5.6 via a link mechanism 18t.◇The link mechanism 18 has one end attached to the tip of the piston rod 16 with a pin. A pair of levers 2i, 22 and lever 21 to be combined
．． The other end of 22 is connected to a bottle and is attached to a holding member 19.20.
It includes a pair of swinging members 23, 24 to which are respectively fixed, and a connecting piece 25 that is T-connected to the swinging spade members 23, 24.

One end of each lever 21, 22 is connected to the tip of the piston rod 16 by a pin 26 parallel to the workpiece rod l.

Moreover, the -l1liiii portion of the pin 26 is movably engaged with the guide hole 17. The connecting piece 25 extends vertically between the piston 11s16 and the workpiece rod l. The self-sweeping members 23 and 24 are connected to the pin 2 at both upper and lower ends of the connecting piece 25.
6 and are pivotably supported by pins 27 and 28 parallel to each other. The other ends S of the levers 2t, 22 are connected to the connecting piece 2.
5', on the opposite side from the workpiece rod l, are connected to the rocking members 23, 24 through pins 29.3 (l) parallel to the pin 26, respectively.

In the rocking member 23.24, the pin 29.30 (!: on the opposite side, the holding member 19.20
are respectively pivoted by screw members 31 and 32. The holding member 19.20 can be varied in its stiffness by t1/l'It by loosening the screw member 31.32t. Therefore, corresponding to the @momo of the workpiece elongation, both ends -
Let 5.6 freely KI the distance of darkness! &1IiI11 can be done.

At the center of the connecting piece 25, there is a stopper 33 protruding from the tip sK of the piston rod 16.
The protruding wrinkles are such that when the piston rod 16 comes into contact, the opening angle of the peg lever 21.22 is ≦180 degrees or less, preferably 18
The value is chosen so that it is 0 degrees. The opening angle f is 180
When selected, the effect of the link mechanism 18 can be maximized. That is, with a relatively small driving force of the cylinder 13, the knurling 5.6 can be pressed against the workpiece with a relatively large force.

The connecting piece 25 and the dynamic members 23 and 24 are made of Renoku-21.
, 22 are positioned by the stopper 33, the rod S is held over the entire diameter of the rod L that is located in the guide hole 17.
The positions of the holding members 19 and 20 are selected so that the members 19 and 20 are located. 1 can be 0 and support arm 1
2 is held between the footrest 34 and the support s9, and can be freely removed by loosening the screw member 35. FIG. 4 is a perspective view of the vicinity of the knurling 5.6.

A cutting tool 7 is held between the other support part 1O and a fixed base 36. The cutting tool 7 is placed on the lower side of the knurling 5.6 along the feed direction 8 to cut the workpiece 111t. Moreover, by loosening the screw member 37, the cutting tool 7 can be attached and removed. Note that the cutting tool 7#'i may be fixed at the same position as the candle (5.6) along the feeding direction 8.

In knurling the workpiece rod, first, the workpiece rod l is held horizontally between the tailstock 2 and the headstock 3. Next, the cylinder 13 is driven to move the piston 1n.
Extend by 16f. As a result, the knurls 5.6 are pressed against both outer surfaces of the workpiece @X on the -@Katsura line. In this state, the tool rest 4 is fed in the feed direction 8 at a speed of, for example, Oe 4'mm per minute while rotating the workpiece rod l at a rotation speed of about 1300 λm, for example. Then, the outer surface of the workpiece is cut by the cutting tool 7 and then rolled by the double-ended ret 5.6, and the knurling is completed with only one feed operation along the feed direction 8 of the tool rest 4. do.

During knurling as described above, the cylinder 13
5. Both mouths are let through the main body power stock structure 18.
6's pressing against the workpiece 41 is converted into force. Therefore, the driving force of the cylinder 13 can be relatively small. In addition, since the pressing force of the double-ended ret 5.6 to the workpiece rod l is applied evenly, it is possible to prevent variations in the knurling top extension due to escape of the workpiece rod l, and it is also possible to prevent The rotational driving force of the rod l can be reduced. In addition, if the It-11 of the workpiece rod l is small, the knurling will be less noticeable in the conventional hole and -let processing, and on the other hand, if the diameter is large, the knurling will be less noticeable. It was getting better. However, according to this embodiment, in order to prevent the stopper 33 and the piston extension 16 from coming into contact with each other, if the diameter of the workpiece rod l is small, the opening angle of the levers 21 and 22 becomes even larger. The pressing force of .6 is large, and the above-mentioned conspicuousness becomes high. Further, when the diameter of the rod 1 to be processed is large, the opening angle of the lever 21.22 is small, so that the pressing force of the knurling 5.6 is small, and the above-mentioned prominence becomes low. Therefore, deterioration of the machining quality due to variations in the diameter of the work piece is prevented.

5.6'i To separate the workpiece 41i from the workpiece 41i, the cylinder 13 should be driven slightly as shown in FIG. The knurling 5 (6) moves away from the workpiece ml by rotating as shown in the figure.

Note that the holding member 19.20 does not need to be on one diameter line of the workpiece rod l with the knurling 5.6 in contact with the outer surface of the workpiece rod l, and the knurling 5.6 is aligned on the -diameter line. That's fine.

As another embodiment of the present invention, as shown in FIG.
b: 43 jiku and 43b may be held respectively. In addition, one knurling is held in ten thousand holding blades,
A pair of knurls may be held on the other holding member.

As another embodiment of the present invention, the cylinder 13 may be replaced with a driving means consisting of a combination of a torque motor and a linear head. In addition, since rolling is performed using a plurality of knurlings, knurling is achieved in only one process, thus improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing -S of a lathe according to an embodiment of the present invention;
2- is a plan view showing the vicinity of the tool rest 4 in Fig. 1, Fig. 3 is a view of the l1lT section seen from the cut plane thin l1l-111 in Fig. 2, and Fig. 4 is a perspective view of the vicinity of the knurling 5.6. , 5th! ! l
I is the state 1 in which the knurl 5.6 is separated from the workpiece rod l
FIG. 6 is a cross-sectional view of another embodiment of the present invention. l... Workpiece palm, 2... Tailstock, 3... Headstock,
4...Turret rest, 5, 6.42a, 42b, 43a, 4
3b...---let, 7...bite, 8...insertion force direction, 13...cylinder, 18...link machine [,
19,20゜40.41...Retaining member agent Patent attorney Shikyo Keibu

Claims (1)

[Scope of Claims] (Lid) A tool rest that is fed from the tailstock to the headstock along the workpiece rod held between the headstock and the spindle has a turret that is connected to the axis of the workpiece. A plurality of knurls are held by holding members movable toward and away from the workpiece rod on both sides of the workpiece rod, and are pressed against the outer surface of the workpiece rod, and a plurality of knurls are provided at the same position as the knurls or on the lower side along the feeding direction. A & board characterized by being provided with a cutting tool for cutting the outer surface of a processing rod. (2) The holding member holds the workpiece rod from the driving means.
Claims characterized in that the link is connected to a link that converts a reciprocating motion in an angular direction into a motion along an arc centered on an axis parallel to the axis of a workpiece. The lathe described in paragraph 1.