DE2355750A1 - Rivet forming machine - uses rotation and hydraulic pressure reducing noise and fatigue - Google Patents

Abstract

The cylinder is held vertically on a machine frame and internally it forms a hydraulic power cylinder. Sliding within it is the slider whose larger diameter portion forms the piston. Mounted rotatably within the slider is the shaft carrying the rivet former. Fixed above the slider is the drive motor for rotating the shaft. Hydraulic feed pipes are connected to the orifices feeding respectively above and below the piston to drive the slider down and up. The hydraulic feed pipes are connected to a foot operated change-over valve. In the upper position, to avoid constant pumping at high pressure, a pressure relief is provided by allowing oil to flow from the cylinder space past the reduced diameter part of the slider direct to the pump.

Description

Legal string: 8513

Vairsnir.iv.väite

Dipl.-ing - T = - EdsT
DIpL-In ₃ . K. Schieschke 2355750

8MDnchen13, ElisabethstraBe34

TOSHIKAWA IRON "WOEKS LTD. ITo. 324, Shitomiya, Ski j onawate-shi,

Ösaka-fu / Japan

Uietform machine

The present invention relates to a heat forming machine.

Known machines of this type produce, due to the a metformer during the upsetting work performed by an eccentric mechanism on an i-rivet head Impacts and bumps make considerable noise, adding to the already considerable exertion caused by the human effort resulting from actuation of the step switch for the up and down movement of the working shaft, another great physical strain is added.

The object of the invention is to create a rotating Pressing device in connection with a pressure oil system instead of the usual foot switch mechanism to be operated by human power for up and down movement of the working method, see above. that when creating low-noise jobs, the workload is reduced and thus an increase in Work performance and consequently an increase in production capacity results.

509820/0 130

To achieve this object, the invention provides a rivet forming machine before with a rotating output shaft that is equipped at its lower end with a rivet former, and with a Brucköläystem for raising and lowering the Working shaft, which has a pump driven by a motor and a distributor valve, with which the oil flow alternately can be switched from supply to drain and vice versa between two lines running in opposite directions, one Cylinder with a working cylinder that can be moved up and down therein, which one with openings for the up and down Causing downward movement between the working cylinder and cylinder having oil cooperating piston, the working cylinder together with 'the extending through this The working shaft is rotatable and the working shaft is controlled by the up and down movement of the Working cylinder is removable.

According to one feature of the invention is a discharge line connected to the working cylinder to regulate the oil pressure during the duration of the upper position of the working shaft, so that the oil pressure cannot rise too high and damage the mechanism while the pump is running continued supplying oil to the working shaft in its upper

To hold position. . .

The invention is described below with reference to the appended Drawings illustrated embodiment described in more detail.

In the drawings shows:

Fig. 1 is a side view of an inventive Rivet forming machine;

Fig. 2 is an enlarged front sectional view of the machine.

509820/0130

Like from Pig. 1, the rivet forming machine 11 has a base 12 with a stand 13 arranged vertically thereon, and in the upper area on the front of the stand 13 has a vertical cylinder 14 in which a working shaft 15 which can be moved up and down is rotatably arranged is. The top of the. Output shaft 15 is with a / -motor 16 connected, and the working shaft 15 is equipped with a Metformer 17 at the lower end. Exactly below of the Fietformer is in the middle section of the front of the stand a table 18 is provided which carries a holder. ".

As can be seen from the section according to FIG. 2, extends through the cylinder 14- a working cylinder 21, the on its circumference between its upper and lower ends a pressing on the inner wall of the cylinder 14 Piston 22 is open. At the top is the cylinder 14 closed by a cover 23 which is firmly connected to the cylinder 14 via a screw or the like and has a through hole 24 for the passage of the working cylinder. To prevent leakage, are on the point of contact between the working cylinder 21 and the Through hole 24 and at the lower point of contact between Working cylinder 21 and cylinder 14 seals are provided. ...-. "

In the upper and lower lateral surface of the cylinder 14 are a passage opening 25 for the supply of pressurized oil. Downward movement of the piston 22 and a passage opening 26 for the upward movement of the piston 22 causing oil supply provided. Below the passage opening 26 an annular projection 27 is formed which against the circumference of the working cylinder 21 within the cylinder 14 is present.

Below the annular projection 27 is in the cylinder

509820/0 130

an oil drain opening 28 is provided. On the outer surface of the working cylinder 21 is an annular concave circumferential groove 29 formed, which the opening 26 with the opening 28 connects during the top dead center position of the piston 22. One in a vertical courage 30 in the circumference of the working cylinder 21 screwed in bolt 31 prevents the Working cylinder. The oil drain opening 28 is with a pipe 32 connected, which opens into a collecting container 33. The upper passage opening 25 is with an oath of a pressure oil line 34 and the lower passage opening 26 is with the one end of a second pressure oil line 35 is connected. At the other end of the line 34 an oil pump 36 is connected, which is operated by a motor 37. A two-way valve 38 with four passageways to switch over at the same time the functions of the lines 34 and 35 alternately with oil supply on oil drainage and vice versa is with both lines at a point between the pump 36 and the passage opening 25 and between the collecting container 33 and the Durchlaßöffnuig26 tied together. A foot operated electromagnetic device is used to operate valve 38 intended. The (not shown)! ^ Switching mechanism is operated by human power and only supplies the electromagnetic device with power. One line 40 with a cone valve 41 is at one end on the line 34 between the two-way valve 38 and the passage opening 25 and connected to a collecting container 33 at the other end.

The working shaft 15 is the spindle of the working cylinder 21 formed, the upper and lower ends of which rotate on bearings, so that the output shaft 15 is smoothly opposed the working cylinder 21 can rotate.

The motor 16 is seated on a platform 43 provided at the upper end of the working cylinder and transmits its rotary motion engage on the output shaft 15 via a concave recess 46 in the upper end of the output shaft 15-

5098 20/0 130/5

de wave 44.

A NietXormer 17 is attached to the lower end of the working shaft A mandrel 47 with a spiral thread which engages in a threaded hole 48 in the upper end of the Hl etformer 17 is operational -tied together.

According to the invention, the oil located in the container 33 is removed from the oil the pump 36 at the start of engine work via the valve 38 conveyed through the line 34, and when the valve 38 is switched over, it moves into its right-hand position shown in FIG the oil via the line 35 in. the passage opening 26, so that the oil the working cylinder 21 "through on the piston 22 pressure acting from below moves upwards. Since the projection 27 acts on the piston 22 at its lower circumference, there is no connection between the passage openings 26 and. 28, so that the piston 22 can be pushed upwards without interference by the oil.

As soon as the piston 22 has reached top dead center, is it is no longer acted upon by the projection 27 at its lower end, but the projection 27 comes opposite the annular concave! does 29 to lie so that reconnects between the passage openings 26 and 28 via a (not shown) between the projection 27 and the concave Hat 29 limited gap is created, with the used oil via the drain opening 28 and the line 32 back into the collecting container 33 arrives. The gap thus fulfills the Function-a relief line, releasing excessive oil pressure prevented during the duration of the top dead center position of the 'piston 22.

After ■ supporting material on the table 18 attached Rivet holder 19 is activated by the foot control - the electromagnetic Device actuates and switches the two-way valve 38 in the left position shown in Fig. 2, so that the in the container 33 contained oil on the. Line 34 to Passage opening 25 reaches and the oil pressure the piston 22

5O982Ö / 0130

acted upon from above and the working cylinder 21 downwards pushes to its bottom dead center position, with the on The rivet former 17, which is seated at the lower end of the shaft 15 rotating with the motor, forms the rivet resting on the rivet holder. As soon as the piston 22 reaches its bottom dead center position has, the used oil flows through the line 40 and the control valve 41 back into the collecting container 33 j so that excessive Oil pressure and thus further pressure on the piston via the opening 25 is prevented.

The machine according to the invention allows, thanks to the pressure oil system for raising and lowering the working shaft, a continuous rivet formation, with the oil flow via the lines and the passage openings back and forth to oil supply and oil drain being switchable via a two-way valve. Instead of human labor, a motor is used to pump the oil in order to reduce the workload, the resulting low-noise work contributing to less fatigue of the workers and thus to an increase in the performance capacity. A single, jointly provided spindle for the cylinder and piston also makes it possible to reduce the size of the machine. In addition, there is no risk of an excessive oil pressure when raising or lowering of the piston in the inventive machine, thanks to the; -eingebauten relief line, which prevents any disturbance in the pressure oil system

Dip! .- ;; ■■ £! - E. Edsr on 13. EiisabcthstraBe 34

509820/0130

Claims (2)

Patent attorneys Expectations [1 ► jRivet forming machine, characterized by a rotating —Working shaft (15), which at its lower end with a Rivet former (17) "is equipped, and by a pressure oil system for raising and lowering the working shaft (15), which has a pump (36) operated by a motor (37) ″ and a distribution valve (38), with which the oil flow alternately from supply to drain and vice versa switchable between two "opposing lines (34-, 35) is, a cylinder (14;) ^ with a movable up and down therein Working cylinder (21), which one with openings (25,26) for the up and down movement between Working cylinder (21) and cylinder (14) effecting oil having interacting piston (22), the working cylinder (21) rotatable together with the working shaft (15) extending through it and wherein the Working shaft (15) by the up and down movement of the working cylinder (21) controlled by the divider valve (38) can be carried. 2. rivet forming machine according to claim 1 _s characterized by an additional passage opening (28) which is provided via a line (32) with a collecting container (33) connectable below an oil supply opening (26) serving for lifting the piston (22), through an annular projection (27) acting on the working cylinder (21) between the oil supply opening (26) and the passage opening (28) and through a concave circumferential groove (29) in the working cylinder (21), which together with the annular projection (27 ) delimits a gap acting as a relief line, the concave shepherd (29) being acted upon by the annular projection (27) during the top dead center position of the working shaft (15). Dip! .- ing. E. Έ. Dlpl.-l / irj. K. Schi 5 0 9 8 2 0/0130