JPS6190818A - Cutter - Google Patents

Abstract

PURPOSE:To achieve high quality cutting face while to reduce the weight of entire system by shearing a metal rod through utilization of the kinetic energy and speed of natural fall of a weight. CONSTITUTION:A steel rod W is inserted into a hole of lower cutter 2 while pulling up a weight 6 by means of the pull-up section 8 then contacts against a stopper 32 to set the cutting length. Then the weight 6 is fallen down naturally along a guide 7 onto a driven section 5. An upper cutter 4 is driven downward through the falling energy and speed thus to shear the steel rod W with high speed by means of the upper and lower cutters 4, 2. Since power is required only for pulling up of the weight, the entire system is made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting machine for bar-shaped metals such as bar sets.

The cutting machine of the present invention can be used in the mechanical industry, 11-stage industry, etc., which cut bar-shaped metals.

[Prior Art] Conventionally, a cutting machine for a bar assembly uses a shearing method to apply shearing force to the bar assembly using an upper blade and a lower blade to cut the bar assembly.

In this case, the lower blade is usually fixed to the base, and the upper blade uses a flywheel etc. to change the rotational movement to vertical movement, and the vertical movement of the upper blade applies shearing force to the rod assembly, cutting the rod assembly. ing.

[Problems Solved by the Invention] In the shearing type #J cutter, if the downward speed (cutting speed) of the upper blade is low, the quality of the cut surface will be poor. On the other hand, if you try to increase the cutting speed to improve the quality of the cut surface, the flywheel that drives the upper blade will need to be larger and structurally more rigid, making the equipment expensive. Become.

An object of the present invention is to provide an inexpensive cutting machine in which the vJrIfI speed of the upper blade is high, the quality of the cut surface is good, and the cutting machine is inexpensive.

[Means for Solving Problem L] The cutting machine of the present invention has a base, a lower blade member having a lower blade fixed to the base, and a front end surface adjacent to the front end face of the lower blade. a driven part having an upper blade held on the base so as to be movable in the vertical direction; a weight that falls onto the driven part and moves the upper blade downward with respect to the lower blade; It is characterized by comprising a lifting part that is held on a base and raises the weight.

The cutting machine of the present invention utilizes the natural fall of a weight, and uses the kinetic energy and speed of the weight to drive the upper blade at high speed and with a high vJ load, thereby providing the high speed and large shearing force necessary for cutting. It is. The cutting lever of the present invention does not require a large device even if it includes a lifting section for lifting the weight upward, and is extremely inexpensive.

[Detailed Description of Configuration of the Invention] The cutting machine of the present invention includes a base, a lower blade member having a lower blade,
The main components are a driven part having an upper blade, a weight, and a pulling part.

The base constitutes the frame of the entire cutting machine. This base usually consists of a base and a frame held on the base for pulling up all.

The lower blade member is fixed on this base. The lower blade member is usually formed with a holding part for holding the bar material to be cut, and a corner formed by the holding part and an end surface of one end of the holding part constitutes a cutting edge.

The bar to be cut is inserted from one end of the groove holding portion of the lower blade member and cut at the other end. Note that the base may be provided with a feeding device that feeds the bar material to the holding portion of the lower blade member.

Further, in order to define the cutting length of the bar, a stopper can be provided on the side of the lower blade that faces the cutting surface, and has an abutment surface that can adjust the distance between the lower blade and the lower blade.

The upper blade opens with its cutting edge facing closely to the cutting edge of the lower blade. This relative movement between the lower blade and the upper blade causes shearing force to act on the bar material. This upper blade is fixed to the driven part.

Preferably, the driven part is formed of a cradle that receives the impact of the weight, and a second guide that guides the cradle so that it can move in the vertical direction. In this case, the second guide can be fixed on the base and can be composed of a guide column and a return spring, with which the driven part is guided and slides into contact. The return spring absorbs the kinetic energy of the driven part and returns the driven part that has been driven downward to the upper position.

The weight drives the driven part downward and provides the driving (shearing) speed and shearing force of the upper blade necessary to cut the bar material. This shearing force and shearing rate can be set by the falling distance of the weight, the weight of the weight, etc. The better the falling distance, the faster the shearing rate, and the heavier the weight, the stronger the shearing force. The heavy 5-shaft falls naturally, but in order to reliably drive the driven part that holds the upper blade in the vertical direction,
In addition, a first guide is provided on the base so that the weight is held in a fixed position after falling onto the driven part, and the weight is guided by the first guide and always moves up and down along the guide. Preferably, it is movable. As such a first guide, it is possible to use one in which a guide column is fixed on a base, a center through hole is provided in the weight, and the guide column is inserted into the center n through hole and guided.

The lifting unit is for pulling up the weight again to its original upper position before falling, and can be composed of a pulling wire, a drive motor for driving the lifting wire, and the like.

[Operations and Effects of the Invention] The cutting machine of the present invention allows the weight to fall naturally while being pulled upward, and the driven part is impulsively driven downward by the weight.
By driving the upper blade attached to the driven part relative to the lower blade, high shearing speed and shearing force are applied to the bar held between the lower blade and the upper blade, and the rod is The natural falling speed of the six weights used to cut wood is approximately 10 meters, and the high shearing speed of 4°9 m/sec and the use of heavy weights provide a large shearing force. . Further, the lifting section for lifting the weight may be of a minimum force necessary to raise the weight, and a small drive motor can be used for this purpose. Therefore, the weight lifting section required to drive the upper blade can be relatively lightweight, and the overall size and weight can be reduced. Therefore, the cutting machine of the present invention can be manufactured at extremely low cost.

Further, since the cutting speed, that is, the shearing speed is fast and the shearing force is large, the cutting of the bar material can be achieved in an extremely ideal manner, and it is possible to cut the bar material with high quality of the cut surface. Note that the bar material that can be cut by the cutting machine of the present invention is a metal material such as a long steel bar, similar to the conventional shearing type cutting machine.

[Example] FIG. 1 shows a schematic side view of main parts of a typical cutting machine of the present invention.

This device includes a base 1, a lower blade member 2 having a lower blade 21, a stopper 3, an upper blade 4, a driven part 5 having the upper blade 4, and a heavy &1
6, a first guide 7 for guiding the weight 6, and a lifting section 8.

The base 1 includes a base 11 and a frame 12 fixed to the base 11.
and a substrate 13.

As shown in a perspective view in FIG. 2, the lower blade member 2 is provided with a hole 2a serving as a holding portion. A lower blade 21 is formed at a corner formed by this hole 2a and the left end surface of the lower blade member 2 shown in FIG. This lower blade member 2 is the base plate 1.
It is fixed on 3.

A stopper 3 is fixed on the substrate 13 at a horizontal position facing the left end surface of the lower blade member 2.

At the top of the stopper 3, there is provided a screw-in adjustment rod 31 whose end surface serves as a stopper surface 32. The length of the bar to be cut is adjusted by feeding the screw of the adjusting rod 31.

The driven portion 5 includes the upper blade 4, a driven plate 51, a pedestal 52, and a second guide 53.

The second guide 53 is composed of four guide columns 531 fixed on the four corners of the board and a compression spring 532 held by each kite column 531.

The driven plate 51 is guided by these guide columns 531 and held upward by a compression spring 532. A cradle 52 is fixedly held above the driven plate 51, and an upper blade 4 is fixedly held below it.

The upper blade 4 has a groove 4 on the lower end surface as shown in the perspective view in FIG.
Has 8. The cutting edge 41 of the upper blade 4 is connected to this groove 4a and the lower blade 21
It is formed at the corner where the opposite side intersects with the opposite side. The blade tip surface of the upper blade 4 and the blade tip surface of the lower blade 21 are opposed to each other, and both surfaces are in a state of relative movement in parallel directions. It is desirable that the pedestal 52 be made of a metal material that has excellent vibration and vibration absorption properties.

A cylindrical guide column constituting the first guide 7 is fixed from the center of the upper end of the frame portion 12 .

The weight 6 has a cylindrical shape having a center through hole 6a, and a first guide 7 is inserted into the center through hole 6a, and the weight 6 is guided in the vertical direction by the first guide 7. A hook 61 is provided above the weight 6.

The pulling unit 8 is a winding unit equipped with a drive motor that guides the wire loaf 81 tied to the hook 61 of the weight 6 and the wire rope 81, and winds up the guide roller 82 fixed to the upper end of the frame unit 12 and the wire rope 181. It consists of machine 83.

The cutting machine of this embodiment has the above configuration.

This cutting 111Ii machine is heavy &! as shown in Figure 1. 6
is pulled upward by the pulling part 8, insert the steel bar W into the hole 2a of the lower blade member 2, and place its end face against the stopper surface 3.
2 to keep the distance between the stopper surface 32 and the cutting edge surface of the lower blade 21 constant. Next, the weight 6 is allowed to fall naturally from an upper position. The weight 6 naturally falls downward along the first guide 7 and falls onto the cradle 52 of the driven part 5. Here, the falling speed and kinetic energy of the weight 6 are given to the driven part 5, and the driven part 5 is heavy &! It is driven downward by the impact force of 6. That is, the driven plate 51 is guided by the second guide 53 and driven downward. The upper blade 4 is driven downward together with the driven plate 51. In other words, the upper blade 4 is the lower blade 2.
1, a shearing force having a rapid shearing rate acts on the bar W, and the bar is cut. At this time, since the hole 2a holds the bar W on its wall surface, the bar does not escape and the cutting is performed at the correct position. On the other hand, when the driven part 5 as a whole is driven downward, the downward movement of the driven part 5 urges each compression spring 532 of the second guide 53 in the compression direction, and the velocity energy and potential energy of the driven part 5 are is held by these compression springs 532. When the velocity energy of the driven part 5 is O, the energy held by the compression spring 532 drives the driven part 5 upward and returns it to its original state. Note that the cut steel material falls into a container (not shown) through a hole in the substrate 13 and is stored therein.

This completes one cycle of cutting.

Next, the weight 6 is pulled upward again, and in this state, the cut surface of the bar W is brought into contact with the stopper surface 32, and then 1 & 16 are dropped, thereby making the next cut.

The cutting machine of this embodiment cuts the bar material W using a shear method using a weight 6. Since the upper blade 4 is driven by the falling speed and falling energy of the weight 6, the cutting speed and cutting force of the upper blade 4 are extremely large compared to the sizes of the weight 6 and the lifting portion 8.

As a result, the entire device is relatively lightweight and compact.
Moreover, it is possible to perform cutting with high quality of the cut surface.

In this embodiment, the cutting blades of the upper and lower blades are integrated with the holding members of the respective blades, but the cutting blades may be made replaceable.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing a cutting machine according to an embodiment of the present invention, FIG. 2 is a perspective view of the lower blade, and FIG. 3 is a perspective view of the upper blade. 1... Base 2... Lower blade 3... Stopper 4... Upper blade 5... Driven part 6... Weight 7... First guide 8... Lifting part patent applicant
Toyoda Gosei Co., Ltd. Agent Patent attorney Mamoki Okawa Patent attorney Shudo Fujitani Patent attorney Akio Maruyama Figure 1 Figure 2 Figure 3 a

Claims (3)

[Claims] (1) A lower blade member having a base, a lower blade fixed to the base, and an upper blade having a tip face adjacent to the tip face of the lower blade and held on the base so as to be movable in the vertical direction. a weight that falls onto the driven portion and moves the upper blade downward with respect to the lower blade; and a lifting portion that is held on the base and raises the weight. A cutting machine comprising: (2) The cutting machine according to claim 1, wherein the pulling section has a first guide that guides the weight in the vertical direction. (3) The driven part holds the upper blade and is comprised of a cradle that receives the impact of the weight and a second guide that guides the cradle so that it can move in the vertical direction. Cutting machine as described.