JPH0677905U - Cylindrical body manufacturing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] After wrapping a plate around a core to make a cylinder,
The diameter of the cored bar can be reduced to facilitate the ejection of the cylindrical body. [Structure] A fixed core portion 6 in which a core metal 5 is fixed to a drive shaft 4,
Movable core part 7 which is displaceable with respect to the fixed core part 6.
The vertical division is made and the wedge ring 14 is advanced and retracted at the front end to change the diameter of the core metal 5. Wedge ring 14
Is pushed by the thrust ring 24, the wedge holder 20, and the plunger 22, and the thrust ring 24 transmits the force F applied from the pressing body to the front end face 24a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for winding a metal plate around a cylindrical body and using it as a case of an engine exhaust silencer.

[0002]

[Prior art]

 A device in which a metal plate is wound around a core metal, an end portion of the metal plate is welded to a winding surface to form a cylindrical body, and the cylindrical body is pushed in the longitudinal direction of the core metal and pushed out is disclosed in, for example, Japanese Patent Publication No. 46-43984. Known by the issue. By the way, in recent silencers, the case is double wound or triple wound to reduce noise leakage. However, when a metal plate is wound around the cored bar multiple times, the tightening force becomes large and the friction resistance increases. Therefore, a large force has to be applied to the payout, which may cause scratches on the contact surface of the work with the core metal or crush on the contact surface with the payout tool.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to obtain a device that can dispense a work with a light force.

[0004]

[Means for Solving the Problems]

 Means for solving the problems in the present invention are a core metal for winding a work of a plate material to be supplied, a welding means for welding an end of the wound work to a winding surface, and an extrusion for discharging the work from a front end of the core metal. In the cylindrical body manufacturing apparatus including a machine, the core metal includes a vertically split fixed core portion and a movable core portion, the fixed core portion is fixed to one side of the drive shaft, and the movable core portion is a fixed core. A wedge ring that adjusts the distance between the cores between the fixed core and the movable core, and between the thrust ring that is movably held facing the front. A wedge mechanism is also provided, and a pressing body for advancing the thrust ring is arranged on the front surface of the thrust ring so as to be retractable.

[0005]

[Action]

 By transmitting a force from the pressing body to the wedge mechanism, the movable core portion of the core metal is moved to a predetermined position by a wedge action to expand the diameter and become a winding core. When the pressing body is retracted after winding the work, the wedge ring retracts, the movable core approaches the fixed core side and the diameter decreases, and a gap is created between the work core and the work. There is no resistance.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, 1 is a cylindrical body manufacturing apparatus, 2 is its frame, 3 is a motor installed in a rear frame 2a, 4 is a drive shaft rotated from the motor 3 via a belt, 5 is a drive shaft 4 It is a cored bar fixed to.

As shown in FIGS. 3 and 4, the cored bar 5 is composed of a vertically split fixed core portion 6 and a movable core portion 7. The cored metal 5 has a flange 8 fixed in contact with the step portion 4 a of the drive shaft 4. The base end of the fixed core portion 6 is fixed inside the cylindrical portion 8a. The movable core portion 7 is connected to the connecting pins 9 on both sides shown in FIG. 4 by the spring 10 to receive the pressure in the approaching direction, and when the diameter is increased, a gap c is generated in the facing surface. The cam 7a is fixed to the inner surface on the 8 side so as to cooperate with the cam 8b on the inner surface of the flange, and when pushed axially toward the flange 8 side, the gap c comes into contact with the cylindrical portion 8a, and the two core portions are It is designed to form a perfect circle with 6 and 7.

In order to expand or reduce the core metal 5, a wedge mechanism 11 is provided at the tips of both core portions 6 and 7, and a semicircular edge is formed on the inner surface of the tip on both core portions 6 and 7 side. Gold 12 and 13 are fixed, and outwardly open pressure receiving surfaces 12a and 13a are formed on the front surfaces thereof. One of the pressure receiving surfaces 12a uses a part of the thick fixed core portion 6 as a part of the pressure receiving surface.

The drive shaft 4 is a tapered shaft inside the cored bar 5, but is provided with a cylindrical small-diameter portion 4b on the tip side thereof, and the wedge ring 1 having a truncated cone-shaped wedge surface. An extension shaft 15 in which 4 is loosely fitted is connected. The extension shaft 15 includes a cylindrical portion 15a interposed between the small-diameter portion 4b and the rims 12 and 13, and a flange 15b facing the front surface of the cored bar 5. A spacer 16 is provided between the rear surface of the flange 15b and the front surface of the fixed core portion 6, and the extension shaft 15 is fixed to the drive shaft 4 by tightening a bolt 17 into a screw hole 18 at the front end of the drive shaft 4. The fixed core portion 6 is also held by the drive shaft 4.

Prior to fixing the extension shaft 15 to the drive shaft 4, a wedge holder 20 is fitted to the extension shaft 15, and a plunger 22 is slidably fitted in a guide hole 21 formed in the flange 15b. It is inserted, and the screw portion 22a at the front end thereof is screwed into the screw hole provided in the wedge holder 20. Plural plungers 22 are arranged on the circumference, and the wedge ring 14 is fixed to the rear end of the plunger 22 with a bolt 23.

A thrust ring 24 is supported by a needle bearing 25 on a sleeve 20 a at the front of the wedge holder 20, and a thrust bearing 26 is provided between the thrust ring 24 and the wedge holder 20. In the figure, 20b is a return spring, and 24b is a star ring of the thrust ring 24.

When the thrust F in the substantially axial direction acts on the front end face 24 a of the thrust ring 24, the wedge ring 14 pushes the pressure receiving faces 12 a, 13 a via the wedge holder 20 and the plunger 22, and the movable core portion 7 moves. It is moved outward against the spring 10 to maximize the clearance c. In this state, the work W of the plate material is wound around the core metal 5, the end of the work is welded to the winding surface to form a cylindrical body, and then the thrust F applied to the thrust ring 24 is released. The core portion 7 moves inward to reduce the diameter, the wedge ring 14 retracts, and the cylindrical body is easily discharged.

In FIGS. 1 and 2, reference numeral 28 denotes a pressing body, which is supported by a lower frame 2b by a support shaft 29, a plunger of a cylinder 30 is connected to a lower end thereof, and a pair of rollers 31 is supported at an upper portion. ing. When the pressing body 28 is in the upright position shown in the figure, the front end of the extension shaft 15 is supported by the rollers 31 and 31, and at the same time, the front end surface 24a of the thrust ring 24 is pressed by the pressing body 28 in the direction of the arrow F to move the cored bar 5 in place. Expand the diameter.

A pay-out cylinder 32 is provided below the rear frame 2a, a slider 33 is fixed to the plunger 32a, and a U-shaped push-out piece 34 straddling the core metal 5 is fixed to the slider 33.

In FIG. 2, reference numeral 35 is a work feeder for extruding a work W of a sheet metal material, 36 is a work presser for pressing the sheet metal material against the peripheral surface of the core metal 5, 36 a is a pressure roller, and 37 is a welding machine. There is a work W pedestal 38 in FIG. Further, in the fixed core portion 6, a copper electrode plate 39 is replaceably fixed in a groove provided in the longitudinal direction on the peripheral surface, and a cooling water passage 40 is bored therein to cool heat generated by welding. It is supposed to do.

As described above, when the cylinder 30 is first operated to rotate the pressing body 28 to the upright state, the rollers 31, 31 at the tip end support the extension shaft 15 from below and apply the pressure applied from the work pressurizing machine 36. The wedge mechanism 11 is operated by supporting and simultaneously pushing the front end surface 24a of the thrust ring 24 by the side surface of the pressing body 28. That is, the wedge ring 14 pushes the pressure receiving surfaces 12a and 13a to open the movable core portion 7 and expand the diameter of the cored bar 5.

Next, when the work W of a plate material having a predetermined size is supplied from the work supply device 35 and the core metal 5 is rotated while being pressed by the roller 36 a of the work pressurizing device 36, the work W is wound around the core metal 5 and ends. The section comes under the welder 37. Therefore, the welding machine 37 is operated to blow an arc between the metal core 5 and the electrode plate 39 to weld the work.

After the welding is completed, the pressure roller 36 a is raised and the pressing body 28 is tilted, so that the wedge action between the wedge ring 14 and the pressure receiving surfaces 12 a and 13 a is eliminated, and the movable core portion 7 is contracted by the spring 10. It is moved to the side, and a gap is created between it and the inner surface of the cylindrical work W, and it is discharged onto the pedestal 38 without resistance by the pushing piece 34 of the discharging cylinder 32.

In the above-described embodiment, the drive shaft 4 and the fixed core portion 6 are held by the extension shaft 15 connected to the drive shaft 4, and the wedge ring 14, the wedge holder 20, the thrust ring 24, etc. are guided. However, the drive shaft 4 is extended without using the extension shaft 15 and the drive shaft 4 and the fixed core portion 6 are fixed by radial screws or the like, and the wedge ring is attached to the extended portion of the drive shaft 4. 14 may be loosely fitted, the wedge ring 14 may be directly fixed to the wedge holder 20 without using the plunger 22, and pushed by the thrust ring 24. Alternatively, the wedge ring 14 may be attached to the wedge ring 20 without using the wedge holder 20. You may push directly at 24.

[0020]

[Effect of device]

 As described above, the cored bar is divided into two parts, the fixed core part and the movable core part, and the work piece is wound in the expanded state and then the work piece is delivered in the reduced diameter state. Has the effect of not damaging the worm. Since a wedge mechanism is provided at the front end of the cored bar as a means for changing the diameter of the cored bar, it has the advantage that it can be operated with a light force and the diameter can be changed simply by advancing and retracting the pressing body.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 Same as above, side view

[Figure 3] Front view of the core metal

FIG. 4 Same as above, side view

[Explanation of symbols]

4 Drive shaft 5 Core metal 6 Fixed core part 7 Movable core part 11 Wedge mechanism 12a, 13a Pressure receiving surface 14 Wedge ring 20 Wedge holder 24 Thrust ring 28 Pressing body

Claims (1)

[Scope of utility model registration request] 1. A cylinder comprising a cored bar for winding a supplied plate work, welding means for welding an end of the wound work to a winding surface, and an extruder for discharging the work from the front end of the cored bar. In the body manufacturing apparatus, the cored bar (5) includes a vertically split fixed core part (6) and a movable core part (7), and the fixed core part (6) is provided on one side of the drive shaft (4). The movable core part (7) is fixed and is held by the fixed core part (6) so that the distance between the fixed core part (7) and the movable core part (7) is movable. Thrust ring (24) held freely
Wedge ring (14) for adjusting the distance between the two cores
A wedge mechanism (11) is provided, and a pressing body (28) for advancing the thrust ring (24) is arranged on the front surface of the thrust ring (24) so as to be retractable. Cylindrical body manufacturing equipment.