JPS5969210A - Shearing machine for sheet material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manually operated shear driven by a conventional drill and having the purpose of shearing metal plates up to approximately JII door thickness. This shearing machine consists of a main body (1) provided with a support wheel (, 2≠, 2 yo) and a main body (1)
) and one cutting wheel (t, g) cooperating with each other on ), the sheet material being sheared between the cutting edges (/, /ri). The cutting wheels (s, t) are arranged obliquely at an angle α to the vertical plane of the sheet material to be sheared.

Additionally, the free side (/,2) of the shear wheel (,1, &)
, /3) are chamfered at the same angle α to be close to the sheared edge (7g, /7) to form a circumferential surface (#, /7).

Furthermore, the shear wheel ('+') has a circumferential surface (#, /7
) are in the same plane and are arranged relative to each other to form a nip (20). Thus, for example, after sharpening the cutting edges (/za, /ri), the relative position of the shearing wheels <z+t) can be easily adjusted by vertically displacing one of the shearing wheels.

The present invention is driven by a conventional drill and is capable of driving approximately ! Regarding a manually operated shearing machine with the purpose of shearing metal sheets up to a thickness of up to 100 mm, this shearing machine comprises a body provided with a support wheel and one cutting wheel cooperating with each other on this body, the cutting edges of which Shearing the sheet material between the sections, driving one cutting wheel and rotating the other cutting wheel along with the material to be cut.

As an accessory to relatively powerful hand drills, machines of the type described above are compatible with all small hand tools that can easily be used only for thin-walled sheet materials and are too expensive to purchase and permanently sit on the factory floor. It is intended to fill the gap between large machines that are fixed to the machine.

The purpose of this type of shear is to enable both straight and curved cuts of infinite length to be made simply and quickly.

However, to cut the curved gold Ir4 fragment,
The use of conventionally arranged cutting wheels is not without problems. There is a resistance to the curve, which results in a non-uniform cut Wr.

It is an object of the present invention to provide a means to overcome these problems and to easily achieve even and clean cuts when shearing both straight and curved sections. Furthermore, the device according to the invention is designed in such a way that the shear wheels assume a relatively accurate position by simple and quick adjustment.

This is achieved by the machine of the invention, the essential novelty of which is that the cutting wheel is arranged inclined at an angle α to the vertical plane of the sheet material to be sheared, and the free side of the shearing wheel is placed at an angle α to the vertical plane of the sheet material to be sheared. The shear wheel is chamfered to form a circumferential surface proximate to the shearing edge, and the shear wheels are positioned relative to each other so that these circumferential surfaces lie in the same plane and form a nip.

The inclination of the shear wheel provides a significantly better turning ability, so that uniform and clean cuts can be obtained even by inexperienced operators.

Chamfering the plain side of the cutting wheel at said angle α results in circumferential surfaces bounded by the shearing edges, which circumferential surfaces lie in a plane perpendicular to the sheet material to be cut. Thus, after sharpening the cutting edges, all required U6 adjustments of the relative positions of the shear wheels can be achieved by every j1# vertical adjustment. For example, downward pruning
The wheel axle can be advantageously fixed by means of an eccentric fixed mounting.

According to a preferred embodiment of the invention, angle α is approximately 3°.

Other advantages and features will become apparent from the following description with reference to the side elevation plane.

The drawing shows a shearing machine according to the invention, which shearing machine has a first
It has a main body consisting of an upper blade vertical part λ, a first lower vertical part 3 and an intermediate horizontal part V. The upper body portion and the lower body portion are laterally offset relative to each other. The body may be made integrally, for example by casting or by welding the three body parts together to obtain a sturdy construction.

Furthermore, the shearing machine has a cooperating shearing member such as one shearing wheel, one of which is a transverse shearing wheel! and the other is a freely rotating, i.e. co-rotating, shearing wheel 6, each of which is located in its own vertical plane and is therefore displaced parallel to each other. Driven shear wheel! with teeth attached, with the tooth edges oriented in the direction of rotation. Drive wheel! is arranged on an axle that is pivotally supported in the upper part 2 of the main body. The free-rotating wheel 2 is preferably pivotally supported by eccentric fixing means on an axle mounted on the lower body part 3. These axles are parallel and shear wheels! , and are installed at a predetermined distance from each other depending on the diameter of B. Furthermore, the axle is rigid, ie it has fixed axles both axially and radially. The design of the body as a single solid structure contributes to this axle fixation. The eccentric mounting of the lower axle described above makes it possible to compensate for multiple material losses by radial adjustment when sharpening the cutting edge.

Each shearing wheel j, O has an inner surface io, i/ facing the main body portion λ, 3, respectively, and an outer surface /2. /3, and radially outer surfaces /4' and /J', respectively.

External surface/2. /3 is the inner surface i0. ii and thus the radially outer surface /'I, /! is inclined.

According to the present invention, it is possible to cut the wheels! and 6 extends #4 at an angle α to the vertical plane. This improves maneuverability when shearing curved cuts.

Wheel surface/, 2. The peripheral edges of /3 are sloped at the same angle to form peripheral angles /l, /7.

Thus, after sharpening of the cutting edge (which is carried out from the radially outer surface), the lower shearing wheel t has to be adjusted only in the vertical direction by means of its eccentric fixing means.

The cutting edge /r, / is the radial outer surface t, is and the circumferential surface /
1 and /7, respectively.

The angle between the cutting edges should preferably be less than 70° and the slope of the radially outer surface should therefore exceed the angle α.

According to a preferred embodiment of the invention, angle α is approximately 3°.

Therefore, a suitable slope for the radially outer surface is approximately 30.

What is important to achieve efficient shearing?

the shear edges /g and /g must be in contact with each other;
The outer surface of the shear wheel /, 2°/3, the peripheral outer part /g, /7 therefore lie in the same plane. Thus, the nip formed by the shear wheel, 20, has no intermediate nitrogen gap, and therefore the shear wheel is single shear.

Single cut grooves or shears are continuously formed as the shears are moved onto the metal sheet and the sheet passes through the nip 20. Furthermore, it does not cause any cutting.

Then, the intermediate horizontal section, besides acting as a connection between the upper and lower parts of the body, additionally acts as a deflector, and for this purpose is made in the form of a wedge, with its leading edge attached to a shearing wheel. , t, perpendicular to the feeding direction of the metal sheet and spaced therefrom, i.e. slightly behind said nip. The wedge-shaped deflection tag has upper and lower support surfaces, the upper support surface being advantageously flush with the shearing wheel nip or contact point, so that one of the separation strips can be carried onto the upper support surface of the deflector without being exposed. , the other separation piece is guided beneath the lower support surface of the deflector.

The upper shear wheel can be driven by a reduction gear consisting of a worm and gear combination enclosed in the upper part λ of the body. A reduction gear is connected to a drive shaft protruding rearward from the main body or is formed on the drive shaft, and is connected to a chuck of a conventional drill, 2/, as a power source. The bar, 2.2, is fixed to the body/and extends away from it. This bar acts as a drive shaft retraction guide and is provided at its rear end with a mounting part 23 for supporting and fixing a power source λ/ (which can be driven pneumatically or electrically).

Furthermore, the shearing machine has two supporting wheels of λ supported by shaft rollers fixed at the bottom of the main body.

Prepare for 2 evenings. Shears on wheels are therefore easily movable and can be easily moved by the operator to a convenient working position during shearing operations.

The wJ source is preferably of a stepless type so that the sheet can be sheared at an adjustable rate depending on its conditions. That is, the sheet feed through the nip depends on the speed of the drive shear wheel j. A drill with a reversing gear allows the shear to pass through the cuts that have already been made. This is extremely useful when cutting pieces from large sheets.

A conical support 27 is connected and arranged to the lower shear wheel B.

This supports the sheet piece moving under the deflector during the shearing process. The conical surface is displaced from the cylindrical shape by an angle α, so that the sheet will be supported on a surface lying in the plane of the sheet during the shearing process.

Additionally, the shear can be made to shear on a bench or the like, i.e. at the level of a normal arm, in which case the drive shaft 20 and par, 22 may be shortened or removed entirely from the embodiments described above. It is also possible to connect the power source attachment part directly to the main body to removably connect the power source to the reduction gear shaft.

As is clear from the drawings and the above description, the shear machine is not obstructed by any member either on the side of the shearing wheel nip, 20, or in the vicinity of the deflector. Therefore, there is nothing to impede the relative movement of the sheet or shears. This means that the sheet to be cut can have any desired width and that cutting can be carried out even on circular arcs with very small radii. After the cutting has taken place, ie the backing of the shear, there are no obstructions at this level in the direction of the relative movement of the sheets.

The shear according to the invention is therefore surprisingly capable of cutting heavy sheets of any material. By properly sizing the shear wheel and power source, it is possible to cut sheets of virtually any desired standard. The cut edges are clean and uniform and do not require any subsequent machining, unlike the cut margins obtained with moxibustion cuts, which formally destroy the heat-set portion of the sheet.

The actual shearing operation is virtually noiseless and smooth, and in particular the use of continuously adjustable speed control provides excellent control of the shear line at any speed deemed appropriate.

Large sheets can be cut and there is no difficulty in cutting even long curves after the sheet has been placed on the support at nip level. A further important advantage is that a conventional drill can be used as a power source, yet can be quickly and easily connected to a shear as shown and described.

[Brief explanation of the drawing]

FIG. 1 is a side view of a sheet material shearing machine according to the invention;
The figure is a front view of the sheet material shear according to FIG. 1, and FIG. 3 is an enlarged detail view of the shear wheel at the nip. 7002 Main body Ko...First upper vertical part 3
...Second lower vertical part Hiroshi...Intermediate horizontal part 10, /
/...inner surface /, 21/3・outer surface /4', /!・
... Radial direction outer surface /l, /7... Peripheral angle Hf,
/! P...cutting edge, 20...nip, 2/...
・Hand drill! Co.../Ri-23...Mounting part 24t, 2! ...Support wheel Rem...
・Shaft, 27...P" forceps support part ・゛、ji" Hand blowing Ti1i (method) Showa 1
November 190 190 Commissioner of the Japan Patent Office Kazuo Wakasugi 1 Indication of matters 1957 Patent side No. 176922 2, Title of invention C 1-
+ A shearing machine 3, relationship with the case of the person making the amendment Patent collapse ν, 4, agent 5, subject of amendment

Claims (1)

Claims: (1) a body provided with a support wheel and λ cutting wheels cooperating with each other on the body, the sheet material being sheared between the cutting edges thereof, one wheel being driven; In a manually operated shear machine driven by a conventional drill configured to rotate the sheet material at the same time as the other wheel rotates -gK with respect to the sheet material to be cut, and which is intended for the purpose of shearing sheet metal up to approximately The wheels (j, g) are arranged inclined at an angle α to the vertical plane of the sheet material to be sheared, and the free side (/2./3) of the shearing wheels (t,
be chamfered at the same angle α to be close to the sheared edge (/J', /ri) to form a curved surface (#, /7),
A manually operated shearing machine characterized in that the shearing wheels are arranged relative to each other so that these circumferential surfaces (#, /7) are in the same plane and form a nip (-). (2) The angle α is about 3° (3) The sorting material shearing machine according to claim 79L, characterized in that the non-driven shearing wheel (B) is fixed by an eccentric fixed mounting part whose vertical position can be adjusted. Sheet material shearing machine according to claim 1. (4) A conical support (, 27) connected to and on the same axle as the non-driven shearing wheel (6); Sheet material shearing machine according to claim 1, characterized in that the inclination of the outer surfaces of the shearing wheels (t, g) corresponds to the angle α. 7-sheet material shearing machine according to claim 1, characterized in that the sheet is chamfered. (6) Sheet according to claim 1, characterized in that the slope of the outer surface is about 50. Material shearing machine.