SU721254A1 - Portable crocodile shearing machine for cutting profiles - Google Patents

Description

The invention relates to small-scale mechanization of construction and installation works and is intended for cutting thin-walled steel profiles with a thickness of up to 1 mm directly at the construction site.

Known stamp for cutting profiles, co- holding plate ⁵ on which is placed sectional shift matrix and interacting with its wedge-shaped blade [1].

Known stamp requires a stationary press and a large set of sections of the matrix for cutting different profiles.

Known portable portable scissors for cutting profiles containing a bed, two interacting knives, one of which is fixedly mounted on the bed, and the other, movable, is made wedge-shaped, and a lever pivotally connected to the bed [2].

A disadvantage of the known scissors is that · for cutting profiles of various sizes and configurations, the number of fixed knives is equal to the number of sizes of various profiles.

In order to expand technological capabilities by increasing the range of cut profiles, the movable knife of the proposed scissors is rigidly connected to the lever, and the fixed knife is made integral in the form of a middle removable part and two sidewalls installed with the possibility of adjusting mutual movement.

In order to improve the quality by setting a certain gap between the knives, the scissors are equipped with an additional fixed knife located on the other side of the movable knife, parallel to the fixed knife.

In FIG. 1 shows the proposed scissors, General view; in FIG. 2 is a section along aa of figure 1; in FIG. 3 - C-shaped profile; in FIG. 4 - channel-shaped profile.

The scissors comprise a frame 1, a lever 2 connected to the frame by an axis 3, movable and fixed knives 4 and 5 interacting with each other, respectively. The bed can be made in the form of a base. 6 from the channel, plate 7, fixed on the base 721254 6 and having grooves 8 for fastening the knife 5 and rack 9. The movable knife 4 is wedge-shaped mounted on the lever 2. The fixed knife 5 is made integral in the form of a flat middle interchangeable g plate 10 and _{5 of} two sidewalls 11, 12 mounted on the plate with the possibility of mutual regulatory movement. The sides I, 12 are mounted on the plate 7 by means of bolts 13, the heads 14 of which are included in the slots 8 of the plate 7. The middle plates 10 are mounted on the plate with screws 15. For high-quality cutting of workpieces, an additional stationary knife 16 is installed on the other side of the movable knife 4 . Fixed knives 5 and 16 are attached additionally 15 but with support bars 17.

For readjustment of scissors, there is a set of quick-change plates 10 along the width of the profile 18. Scissors for cutting the profile work as follows. By means of the lever 2, the movable knife 4 is lifted 20 and profile 18 is placed in the fixed knives 5 and 16. When lowering the knife 4 ', the profile is cut without violating the cross-section and shape of the ends of the profiles.

Changing the scissors to another profile size 25 is carried out by changing the middle plate 10, for which the tightening of the bandages 15 is loosened and the sidewalls 11 and 12 are shifted. The scissors reduce the complexity of installation, increase the versatility of cutting pro-profiles of various sizes.

Claims (2)

(54) LEVER PORTABLE SCISSES FOR CUTTING PROFILES 6 and having grooves 8 for attaching the knife 5 and the pillar 9. The wedge-shaped movable knife 4 is fixed on the lever 2. The stationary knife 5 is made composite in the form of a flat middle replaceable plate 10 and two side panels II , 12 installed on the shield with the possibility of mutual adjustment movement. The sidewalls I, 12 are mounted on the plate 7 by bolts 13, the heads 14 of which fit into the grooves 8 of the plate 7. Medium; replacement plates 10 are mounted on the plate by vishgami 15. For a high-quality cutting of the blanks, an additional fixed knife 16 is installed on the other side of the movable knife 4. The fixed knives 5 and 16 are fastened with additional supporting straps 17. For re-adjusting the scissors, there is a set of quick-changeable plates 10 across the width of schzofil 18. The scissors for cutting the profile work as follows. By means of the lever 2, the movable knife 4 is lifted and placed in a fixed position but 16) and profile 18. When the knife is lowered 4, the profile is cut without disrupting the cross section and shape of the ends of the profiles. The scissors are rearranged to a different profile size by changing the middle plate 10, for which the bandage 15 is loosened and the sides 11 and 12 are shifted. The scissors reduce the laboriousness of the installation P and increase the overall size of the profiles. Claim 1. Lever figurative cutting shears for cutting piles containing a frame, two knives that interact with each other, one of which is fixedly mounted on the frame, and the other, movable, is wedge-shaped, and the lever pivotally connected to the frame, characterized in that the purpose of expansion of technological capabilities by increasing the range of profiles being cut, the movable knife is rigidly connected to the lever, and the fixed knife is made composite in the form of the middle replaceable part and two sidewalls installed with egulirovochnogo mutual movement. 2. Lever portable shears according to claim 1, characterized in that, in order to improve quality by installing a defined gap between the knives, they are equipped with a extended stationary knife, spread on the other side of the movable knife, parallel to the fixed knife. Sources of information taken into account during the examination 1. G. Foygelman Album of designs of universal stamps, blocks and units for cold forming, From-in Mashinostroenie, M., 1965, p. 21. 2.Druzhinin V.A., Volosatov V.A. Carver-pressman Lenizdat, 1963, p. 110-115, fig. -70 (prototype). pueZ