CN100393461C - Cutting mechanism of automatic bar cutting machine - Google Patents

Abstract

The present invention relates to a cutting mechanism of a rod material automatic cutting machine, which belongs to the field of mechanical technology. The present invention solves the problems of low precision, etc. which exist in the existing automatic cutting machine. The cutting mechanism of the rod material automatic cutting machine comprises a motor and blades, wherein the blades are fixed on a rotating shaft of the motor and the blades are positioned on the discharging point of the cutting machine. The cutting mechanism also comprises a connecting rod which is vertically arranged, wherein the connecting rod corresponding to a machine body moves up and down, the upper end of the connecting rod is fixedly connected with the motor and the lower end of the connecting rod is pressed on the edge of a rotatable cam. The discharging point of the cutting machine is provided with a supporting block, a transverse rod is transversely arranged in the machine body, a pressure rod is vertically arranged in the machine body, the upper end of the pressure rod is provided with a pressure rod hole which is used for being passed through by rod materials and the lower end of the pressure rod is connected with the transverse rod. The cutting mechanism can control the blades to move up and down through the mechanical transmission structures of the cam, the connecting rod, etc. The present invention has the advantages of simple structure, reasonable structure and reliable operation. When the present invention is in the cutting process, the position of the rod materials is stable and the cut length is accurate.

Description

Cutting mechanism of automatic bar cutting machine

technical field

The invention belongs to the technical field of machinery, and relates to an automatic bar cutting machine, in particular to a cutting mechanism of the automatic bar cutting machine.

Background technique

In the process of parts processing, it is often necessary to cut a bar into several sections before processing. A cutting machine is a common processing equipment used to cut bar stock.

At present, the most advanced is the automatic cutting machine. As the Chinese Patent Publication No. CN2645832 provides "the automatic bar cutting machine with sliding positioning device", it is made up of a bed, a transmission system, a cutting system and a feeding system, and the transmission system adjusts the required cutting length; the feeding system will The bar is transported to the cutting place; the bar is blocked by the stopper so that it cannot move forward; at this time, the blade on the cutting system cuts the bar through the cylinder. The efficiency of the whole cutting process is higher. However, the cutting machine uses the cylinder to control the blade to move up and down to cut the bar. Although the cylinder pushes the piston rod to move up and down, although the speed is fast, there are problems of low precision and complicated equipment structure.

In addition, there is no mechanism to support the bar at the cutting point, and the bar is easy to tilt, resulting in irregular incisions and inconsistent cutting lengths.

Contents of the invention

The purpose of the present invention is to provide a cutting mechanism of a bar automatic cutting machine for the above-mentioned problems existing in the existing automatic cutting machine, so that it has the characteristics of simple and reasonable structure and high cutting precision.

The purpose of the present invention can be achieved through the following technical proposals: the cutting mechanism of this bar material automatic cutting machine includes a motor and a blade fixed on the motor shaft, and the blade is at the discharge place of the cutting machine. It is characterized in that the cutting mechanism also includes A connecting rod that is vertically arranged and can move up and down relative to the machine body. The upper end of the connecting rod is fixedly connected with the motor, and the lower end is pressed against the edge of a rotatable cam. One end of the cross bar is hinged with the fuselage, the other end is in contact with the edge of the cam, and a spring is arranged between the middle of the cross bar and the fuselage, and the end of the cross bar is close to the cam under the action of the spring. The edge of the body; a pressure rod is vertically arranged in the fuselage, the upper end of the pressure rod has a pressure rod hole for the bar to pass through, and the lower end of the pressure rod is connected with the cross bar.

The cutting mechanism of this automatic bar cutting machine is to move the connecting rod pressing on the edge of the cam up and down through the rotation of the cam, so that the motor fixed on the upper end of the connecting rod moves the rotating blade to cut the bar.

Above-mentioned mechanism is through the rotation of cam, and cross bar drives pressure bar, and finally makes pressure bar press or unclamps the bar material that passes through pressure bar hole. Specifically, when the farthest point of the cam edge reaches the connecting rod, the blade moves up to the highest point; at the same time, the nearest point of the cam edge contacts the end of the cross bar, and the pressure bar also moves up to the highest point. At this time, the bar passes through the hole of the plunger, and the blade is not in contact with the bar. When the closest part of the cam edge turns to the connecting rod, the blade moves down, and the blade is rotated by the motor to cut the bar. At the same time, the farthest part of the cam edge is in contact with the end of the cross bar, so that the cross bar moves down together with the pressure bar, and the pressure bar hole is in the state of pressing the bar. In this way, the position of the bar is fixed, and the blade can cut the bar very stably.

In the cutting mechanism of the above-mentioned automatic bar cutting machine, a support block is arranged at the output of the cutting machine, the support block is fixed on the fuselage, the bar passes through the top of the support block, and the plane of the blade is close to the side of the support block. side.

The support block plays a supporting role on the bar material, so that the bar material moves horizontally, and the position will not be inclined, so as to ensure that the cutting incision is even and the cutting precision is high.

In the above-mentioned cutting mechanism of the automatic bar cutting machine, the top section of the support block is V-shaped.

In the cutting mechanism of the above-mentioned automatic bar cutting machine, a pulley is provided at the end of the cross bar, and the pulley is close to the edge of the cam. The pulley plays the role of reducing the friction between the cross bar and the cam, which is beneficial to the rotation of the cam.

Compared with the prior art, the cutting mechanism controls the up and down movement of the blade through mechanical transmission structures such as cams and connecting rods, and its structure is simple and reasonable, and its operation is reliable.

Set up a support block and a pressure bar at the outlet of the bar. The lower part of the bar is supported. The bar presses the bar at the moment of cutting, so that the position of the bar is stable during the cutting process without shaking or shifting. So that the incision of the bar is flush and the cutting length is accurate.

Description of drawings

Fig. 1 is a structural schematic diagram of a cutting machine with the cutting mechanism.

Fig. 2 is a schematic diagram of the cutting mechanism of the automatic bar cutting machine.

Fig. 3 is a partial schematic diagram of the cutting mechanism of the automatic bar cutting machine at the discharge point.

Fig. 4 is a sectional view along line A-A of Fig. 3 .

Fig. 5 is a sectional view along B-B of Fig. 3 .

In the figure, 1, fuselage; 2, connecting rod; 3, cross bar; 4, cam; 5, support block; 5a, V-shaped groove; 6, spring; 7, pressure rod; 7a, pressure rod hole; 8, Pulley; 9, blade; 10, motor; 10a, rotating shaft; 11, stopper; 12, bar stock.

Detailed ways

As shown in Figures 1 and 2, the cutting mechanism of the automatic bar cutting machine is installed in the body 1 of the cutting machine. It includes parts such as connecting rod 2, cross bar 3, cam 4, support block 5, spring 6, pressing bar 7 and pulley 8.

As shown in FIG. 2 , the cam 4 is fixedly connected in the fuselage 1 , and the cam 4 is driven to rotate by a motor. The connecting rod 2 is vertically arranged, and the upper end of the connecting rod 2 protrudes from the fuselage 1 and is fixedly connected with the motor 10 . The lower end of the connecting rod 2 is in the fuselage 1, and its end is pressed against the edge of the cam 4.

The blade 9 is at the discharge of the cutting machine. The blade 9 is fixed on the rotating shaft 10 a of the motor 10 . The rotation of blade 9 is driven by motor 10 . Simultaneously, by the rotation of cam 4, blade 9 has been moved up and down.

There is a cross bar 3 in the fuselage 1, and the cross bar 3 is arranged horizontally, and one end is provided with a pulley 8, and the other end is hinged with the fuselage 1. Both ends of the spring 6 are fixedly connected to the fuselage 1 and the cross bar 3 respectively. Cross bar 3 its pulley 8 is close to the edge of cam 4 under the effect of spring 6. Therefore, when the cam 4 rotates, the cross bar 3 also swings up and down.

Also be connected with a depression bar 7 on cross bar 3. In this embodiment, the pressing bar 7 is arranged vertically, its lower end is hinged with the cross bar 3 , and its upper end extends out of the fuselage 1 . As shown in FIG. 5, there is a pressure rod hole 7a at the upper end of the pressure rod 7, and the bar material 12 passes through the pressure rod hole 7a. When the cross bar 3 swings up and down, the pressure rod 7 also moves up and down, so that the pressure rod hole 7a leaves or presses the bar material 12 .

As shown in FIGS. 3 and 4 , a support block 5 is fixed at the outlet of the fuselage 1 , and a V-shaped groove 5a is formed on the top of the support block 5 . The bar stock 12 passes through the V-shaped groove 5a. The support block 5 plays the role of supporting the bar stock 12 .

As shown in FIG. 2 , the bar 12 is delivered to the cutting place by the feeding device of the cutting machine. In the process of conveying the bar stock 12, at first the blade 9 and the press bar hole 7a of the press bar 7 are all in the position of moving up, the bar stock 12 passes through the press bar hole 7a and the V-shaped groove 5a of the support block 5, and the front end of the bar stock 12 Move to a stopper 11 place that is fixed on the fuselage 1. Blocked by the stopper 11, the bar stock 12 cannot move forward. Then, along with the rotation of cam 4, connecting rod 2 and cross bar 3 move down, and blade 9 and depression bar 7 are also moved down thereupon. At this time, the support block 5 supports the bar 12 , the pressing rod 7 presses the bar 7 , and the blade 9 cuts the bar 12 . Finally, when the cutting is completed, the blade 9 and the pressing bar 7 move up and return to the initial position. Continuously repeating the above process, the purpose of automatically cutting the bar stock 12 can be realized.

Claims (4)

1. A cutting mechanism of a bar stock automatic cutting machine, comprising a motor (10) and a blade (9) fixed on the motor (10) rotating shaft (10a), the blade (9) is at the discharge place of the cutting machine, and the cutting The mechanism also includes a connecting rod (2) which is arranged vertically and can move up and down relative to the fuselage (1). The upper end of the connecting rod (2) is fixedly connected with the motor (10), and the lower end presses against a rotatable cam ( 4) is characterized in that a cross bar (3) is horizontally arranged in the fuselage (1), and one end of the cross bar (3) is hinged with the fuselage (1), and the other end is connected with the edge of the cam (4). Contact, and a spring (6) is provided between the middle of the cross bar (3) and the fuselage (1), and under the action of the spring (6), the end of the cross bar (3) is close to the cam (4). Edge; a pressure rod (7) is vertically arranged in the fuselage (1), the upper end of the pressure rod (7) has a pressure rod hole (7a) for the bar stock (12) to pass through, and the lower end of the pressure rod (7) Connect with cross bar (3). 2. The cutting mechanism of the automatic bar cutting machine according to claim 1, characterized in that, a support block (5) is arranged at the output of the cutting machine, and the support block (5) is fixed on the fuselage (1) Above, the bar (12) passes over the top of the support block (5), and the plane of the blade (9) is next to the side of the support block (5). 3. The cutting mechanism of the automatic bar cutting machine according to claim 2, characterized in that, the top section of the support block (5) is V-shaped. 4. The cutting mechanism of the automatic bar cutting machine according to claim 1, 2 or 3, characterized in that, the end of the cross bar (3) is provided with a pulley (8), and the pulley (8) is tightly Attach it to the edge of the cam(4).

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