CN114951541A - Integral cutting blade and cutter for high-speed upsetter - Google Patents

Abstract

The invention discloses an integral cutting blade for a high-speed upsetter, which comprises an integral blade body and a blade edge, wherein the blade body and the blade edge are not provided with hole-groove structures; the knife edge is in an inwards concave arc shape and is arranged on the front side of the knife body; the rear side, the lower surface and the left side of the blade body are tightly attached to a tool rest of a high-speed upsetter; the left side surface of the knife body is a first inclined surface which is inclined outwards from top to bottom; the right side surface of the knife body is a second inclined surface which inclines from outside to inside to left. The invention also discloses a cutting tool for the high-speed upsetter, which comprises a tool rest, the integral cutting blade, a pressing sheet and a puller bolt. The invention has the beneficial effects that: the whole blade is made of hard alloy, and a mounting hole groove is not formed in the blade, so that the service life of the blade is prolonged; the blade and the tool rest are designed to be locked by an inclined plane based on a wedge-shaped compression principle, and the blade is fixed in the tool rest by tightly pressing the pressing piece through a bolt.

Description

Integral cutting blade and cutter for high-speed upsetter

Technical Field

The invention relates to a hot shearing technology in a hot forging process, in particular to an integral cutting blade and a cutter for a high-speed upsetter.

Background

A high-speed upsetter is a high-efficiency precise hot forming press, and adopts a horizontal design, and can finish the manufacture from bar stock to precise forge piece by one stroke from bar stock heating to cutting, upsetting cake, preforming, forming and punching. The forging has high precision and little allowance, wherein the very key factor is the realization of precise hot shearing. In precision thermal shearing processes, the machine is typically a fixed blade on one side and a moving blade on the other side. It is known that high speed upsetters are very efficient, up to over one hundred strokes per minute, which means that the moving and stationary blades also effect the hot shearing action of the bar at high speed. The fixed blade is relatively stable, only once thermal shock is caused in one shearing action, the working condition of the movable blade is severe, a second shearing action needs to be prepared, a retracting action is required after the first shearing action is finished, and the movable blade needs to rub a hot bar during retracting, so that the fixed blade is fast in abrasion and short in service life.

At present, the design and machining technology of the blade is relatively mature, and the service life of the blade is generally prolonged by adopting a cobalt-based alloy surfacing process on a working surface (see the failed patent CN 2033567821U). In recent years, with the progress of technology, part of the unit fixed blades applied are made of hard alloy, so that the effect is better; the moving blade is not much improved. Some foreign countries adopt the mosaic type hard alloy (carbide insert) structure design, and good effect is achieved. As shown in fig. 1 and 2, the blade is a blade commonly used in the industry, the blade edge is made of stellite, and the blade body is made of hot-work die steel; the knife rest is provided with a knife groove, the knife body is arranged in the knife groove and is directly pressed on the knife rest through a bolt, and the knife rest is shown in figures 3 and 4 (in figures 4, the reference numbers are 1, the knife body, 2, the knife edge, 3, the knife rest, 4 and the knife groove). However, although cemented carbide has good red hardness, it has poor toughness and impact resistance, and in particular, cemented carbide parts having a mounting hole structure have a poor life span, and generally have a problem of cracking at these portions of the hole.

Disclosure of Invention

The invention aims to provide an integral cutting blade and a cutter for a high-speed upsetter, which have long service life and are convenient to assemble and disassemble, aiming at the defects of the prior art.

The technical scheme adopted by the invention is as follows: an integral cutting blade for a high-speed upsetter comprises a blade body and a blade edge which are integrated, wherein the blade body and the blade edge are not provided with hole groove structures; the knife edge is in an inwards concave arc shape and is arranged on the front side of the knife body; the rear side, the lower surface and the left side of the blade body are tightly attached to a tool rest of a high-speed upsetter; the left side surface of the knife body is a first inclined surface which is inclined outwards from top to bottom; the right side surface of the knife body is a second inclined surface which inclines from outside to inside to left.

According to the scheme, the included angle alpha between the first inclined plane and the vertical plane is 10-20 degrees.

According to the scheme, the included angle beta between the second inclined plane and the vertical plane is 0-10 degrees.

According to the scheme, the knife body and the knife tool are made of hard alloy materials.

The invention also provides a cutting tool for the high-speed upsetter, which comprises a tool rest, the integral cutting blade, a pressing piece and a puller bolt; a cutter groove is formed in the front side of the cutter frame, and the integral cutting blade is installed in the cutter groove; the pressing piece is arranged between the right side face of the integral type cutting blade and the right groove face corresponding to the right side face, and the puller bolt penetrates through a bolt hole formed in the tool rest and is tightly propped against the outer side face of the pressing piece.

According to the scheme, the left groove surface of the cutter groove is a third inclined surface matched with the first inclined surface, namely the third inclined surface is opposite to the first inclined surface in inclination direction, and the inclination angles are consistent.

According to the scheme, the right groove surface of the cutter groove is a fourth inclined surface inclined outwards from top to bottom, and the included angle gamma between the fourth inclined surface and the vertical surface is 0-10 degrees.

According to the scheme, the arc-shaped opening matched with the knife edge is formed in the front side of the bottom surface of the knife groove.

According to the scheme, the front side of the integral cutting blade exceeds the cutter frame.

According to the scheme, one side of the tool rest is provided with the connecting rod, and the tool rest is connected with the high-speed upsetter through the connecting rod.

The invention has the beneficial effects that: the whole blade is made of hard alloy, and the blade is not provided with a mounting hole groove, so that the service life of the blade is prolonged; the blade and the tool rest are designed to be locked by an inclined plane based on a wedge-shaped compression principle, and the blade is fixed in the tool rest by tightly pressing the pressing piece through the bolt.

Drawings

Fig. 1 is a front view of a conventional blade of the related art.

Fig. 2 is a left side view of a conventional blade.

Fig. 3 is a front view of a conventional tool holder.

Fig. 4 is a left side view of a conventional tool holder.

Fig. 5 is a schematic view of the structure of the cutting blade of the present invention.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a front view of fig. 5.

Fig. 8 is a schematic view of the overall structure of the cutter in this embodiment.

Fig. 9 is a schematic view of the structure of the tool holder and the connecting rod in the present embodiment.

Fig. 10 is a top view of the tool holder of this embodiment.

Fig. 11 is a front view of the cutter.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

In fig. 4 to 7, the reference numerals are as follows: 5. a blade body; 5.1, a first inclined plane; 5.2, a second inclined plane; 6. a knife edge; 7. a tool holder; 8. a cutter groove; 8.1, a third inclined plane; 8.2, a fourth inclined plane; 9. a connecting rod; 10. a compression sheet; 11. and tightly pushing the bolt.

The integral cutting blade for the high-speed upsetter comprises a blade body 5 and a blade 6 which are integrated as shown in fig. 5-7, wherein the blade body 5 and the blade 6 are not provided with a hole groove structure; the knife edge 6 is in an inwards concave arc shape and is arranged on the front side of the knife body 5; the rear side, the lower surface and the left side of the cutter body 5 are tightly attached to a cutter frame 7 of the high-speed upsetter; the left side surface of the knife body 5 is a first inclined surface 5.1 which is inclined outwards from top to bottom; the right side surface of the knife body 5 is a second inclined surface 5.2 which is inclined from outside to inside to left.

Preferably, the included angle α between the first inclined surface 5.1 and the vertical surface is 10 ° to 20 °.

Preferably, the included angle β between the second inclined surface 5.2 and the vertical surface is 0 ° to 10 °, preferably 5 °.

Preferably, the blade body 5 and the cutter are made of hard alloy materials.

In this embodiment, an included angle between the first inclined surface 5.1 and the vertical surface is 15 °, and an included angle between the first inclined surface 5.1 and the vertical surface is 15 °; other designs of the integral cutting blade, such as chamfering, have the prior conventional technical means, and are not described in detail herein.

A cutting tool for a high speed upsetter shown in fig. 8 comprises a blade holder 7, an integral cutting blade as described above, a pressing piece 10 and a jack bolt 11; a cutter groove 8 is formed in the front side of the cutter frame 7, and the integral cutting blade is installed in the cutter groove 8; the pressing piece 10 is arranged between the right side face of the integral type cutting blade and the right groove face corresponding to the side face, and the puller bolt 11 penetrates through a bolt hole formed in the tool rest 7 and is tightly propped against the outer side face of the pressing piece 10. The structure of the tool holder 7 is shown in fig. 9 to 11.

Preferably, the left groove surface of the knife groove 8 is a third inclined surface 8.1 matched with the first inclined surface 5.1, namely the third inclined surface 8.1 is opposite to the first inclined surface 5.1 in inclination direction and has the same inclination angle; the right groove surface of the cutter groove 8 is a fourth inclined surface 8.2 which is inclined outwards from top to bottom, and the included angle gamma between the fourth inclined surface 8.2 and the vertical surface is 0-10 degrees, preferably 5 degrees; the bolt hole is opened in fourth inclined plane 8.2. In this embodiment, the included angle between the third inclined surface 8.1 and the vertical surface is 15 °; the fourth inclined plane 8.2 forms an angle gamma of 5 deg. with the vertical plane.

Preferably, an arc-shaped opening matched with the knife edge 6 is formed in the front side of the bottom surface of the knife groove 8.

Preferably, the front side of the integral severing blade extends beyond the blade carrier 7.

Preferably, a connecting rod 9 is arranged on one side of the tool rest 7, and the tool rest 7 is connected with the high-speed upsetter through the connecting rod 9.

In the embodiment, the total length of the cutter groove 8 is greater than the length of the integral type cutting blade by 4mm, the thickness of the pressing piece 10 is 3mm, the pressing piece is convenient to be plugged between the right side face of the integral type cutting blade and the cutter groove 8, and the height of the assembly face of the integral type cutting blade is equal to that of the assembly face of the cutter groove 8. One side of the knife rest 7 is provided with two bolt holes, and the blade and the pressing piece 10 are pressed tightly by two tightening bolts 11 after being plugged. Other designs of the tool holder 7, such as a mounting hole formed in the upper portion of the tool holder 7, an inclined surface on the front side of the tool holder 7, a chamfer design and the like, are conventional technologies, and are not described herein again.

The installation process of the invention is as follows: the integral type cutting blade is inserted into the mounting groove of the cutter holder 7 from the front side, the pressing piece 10 is inserted between the right side face of the integral type cutting blade and the corresponding groove face, the puller bolt 11 penetrates through the bolt hole to tightly push the outer side face of the pressing piece 10, and the pressing piece 10 acts on the integral type cutting blade to fix the integral type cutting blade in the cutter groove 8.

The invention is suitable for a hot shearing scene of a high-speed upsetter, the working surface (the right side surface, namely the surface contacted with the pressing sheet 10) of the integral type cutting blade can be normally repaired after being worn for a certain number of times, the integral type cutting blade can be continuously used after being repaired, only a gasket is added in the groove of the tool rest 7, the total height is in accordance with the height of the original groove, and the number of times of repair is determined according to the final service life of the hard alloy blade.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. An integral cutting blade for a high-speed upsetter is characterized by comprising a blade body and a blade edge which are integrated, wherein the blade body and the blade edge are not provided with a hole groove structure; the knife edge is in an inwards concave arc shape and is arranged on the front side of the knife body; the rear side, the lower surface and the left side of the blade body are tightly attached to a tool rest of a high-speed upsetter; the left side surface of the knife body is a first inclined surface which is inclined outwards from top to bottom; the right side surface of the knife body is a second inclined surface which inclines from outside to inside to left.

2. The integral cutoff blade defined in claim 1 wherein the angle α between said first beveled surface and the vertical surface is between 10 ° and 20 °.

3. An integral cutoff blade as recited in claim 1 wherein the angle β between said second beveled surface and the vertical surface is 0 ° to 10 °.

4. The integrated cutting insert according to claim 1 wherein said body and said tool are formed of cemented carbide material.

5. A cutting tool for a high-speed upsetter, characterized by comprising a tool holder, an integral type cutting blade according to any one of claims 1 to 5, a pressing piece and a puller bolt; a cutter groove is formed in the front side of the cutter frame, and the integral cutting blade is installed in the cutter groove; the pressing piece is arranged between the right side face of the integral type cutting blade and the right groove face corresponding to the side face, and the puller bolt penetrates through the bolt hole formed in the tool rest and is tightly propped against the outer side face of the pressing piece.

6. The cutting tool of claim 5 wherein the left flute face of the flute is a third bevel surface adapted to the first bevel surface, i.e., the third bevel surface slopes in the opposite direction and at the same angle as the first bevel surface.

7. The cutting tool according to claim 5, wherein the right groove surface of the pocket is a fourth inclined surface inclined outwardly from top to bottom, and the angle γ between the fourth inclined surface and the vertical surface is 0 ° to 10 °.

8. The cutting tool according to claim 5, wherein the front side of the bottom surface of the pocket is provided with an arc-shaped opening adapted to the blade edge.

9. The cutoff tool according to claim 5 wherein the front side of the integral cutoff insert extends beyond the toolholder.

10. The cutoff tool according to claim 5 wherein the blade carrier is provided with a connecting rod on one side thereof, the blade carrier being connected to the high speed upsetter by the connecting rod.

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