CN203076613U - Special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade - Google Patents

Abstract

The utility model discloses a special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade, and belongs to the technical field of tools for turning machining, aiming at solving the problems that the existing tools for turning machining are single-edge welded type turning tools and very easy to break due to an impact, a tool-chip bonding phenomenon between the cutting edges of the tools and chips is easy to cause because the tools are not provided with chip-breaking grooves, the tools are low in service life, and increase for the production efficiency is seriously restricted. According to the special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade, a long cutting edge and a short cutting edge are machined at the edge of the front blade surface of the blade; a double-arc tool nose is machined at the corner part of the front blade surface of the blade; the projected platform side surface of the front blade surface of the blade is an arc-shaped concave surface; the area encircled by the arc-shaped concave surface and the peripheral side of the front blade surface of the blade forms an arc-shaped chip-breaking groove; a flow guide groove is formed around the bottom of the arc-shaped chip-breaking groove; a tooth-shaped groove is machined in the peripheral side of a fastening screw counter bore; a blade bottom overflow heat dissipation hole is machined in the bottom surface convex column of the blade; and a blade bottom centre heat dissipation hole is formed between two support bosses. The special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade disclosed by the utility model is used for large-cutting-depth turning machining in rough machining for large forging blanks.

Description

Extreme ultra-heavy load, large depth of cut and impact-resistant special blade

technical field

The utility model belongs to the technical field of cutting tools for turning, in particular to a special impact-resistant blade with extreme super-heavy load and large depth of cut.

Background technique

The large-scale hydrogenation cylinder blank is directly forged, and the weight can reach more than 400 tons. There are many forging defects on the surface to be processed that ordinary forgings do not have, such as: forging shovels, scale, forging cracks and metal coverings, etc.; The materials used in the hydrogen cylinder section are quite special and have strong high temperature toughness. At present, turning and milling are required for the processing of hydrogenation cylinders. For example, the cutting tool used in turning processing is a single-edged welded turning tool. The cutting amount caused by forging defects during the processing changes greatly, and the mechanical impact on the cutting tool is always dynamic. During the change, the cutting force can reach up to about 10 tons, and the cutting tool is easily broken due to impact. In addition, the current cutting tool does not have a chip breaker, which makes it difficult to break the chips during processing, and winds up on the cutting tool, which makes the cooling condition of the cutting tool change. Poor, resulting in a continuous increase in the temperature of the cutting area (up to 1000 ° C). A large amount of cutting heat accumulates on the cutting area, which accelerates the softening of the tool, which easily causes the cutting edge of the tool and the chip to produce a knife-chip bonding phenomenon, and the service life of the tool is low, which seriously restricts the improvement of production efficiency.

Utility model content

The purpose of this utility model is to provide a kind of extreme super-heavy load and large depth of cut impact-resistant special blade to solve the problem that the current turning tool used in turning processing is a single-edged welded turning tool. The tool is easily broken by impact, and because the tool is not set The chip breaker is easy to cause the cutting edge of the tool and the chip to produce a knife-chip bonding phenomenon, and the service life of the tool is low, which seriously restricts the improvement of production efficiency.

In order to achieve the above object, the technical scheme that the utility model takes is:

Extremely heavy load, large depth of cut and impact-resistant special blade, the horizontal cross-section of the blade is rectangular, the cross-section parallel to the length direction and the cross-section parallel to the width direction of the blade are both isosceles trapezoidal, and the area of the bottom surface of the blade is less than The area of the rake face of the blade, the two long edges of the rake face of the blade are respectively processed with a long cutting edge, the two short edges of the rake face of the blade are respectively processed with a short cutting edge, and the four corners of the rake face of the blade Double-arc tool tips are respectively processed, and the middle part of the rake face of the blade is provided with a rectangular raised platform. The area of the raised platform is smaller than that of the rake face of the blade. The area surrounded by the four arc-shaped concave surfaces of the protruding platform and the outer periphery of the rake face of the insert forms an arc-shaped chip breaker, and there are guide grooves around the bottom of the arc-shaped chip breaker. The center of the geometry is processed with fastening screw counterbore along the thickness direction of the blade, and the protruding platform is evenly processed with tooth-shaped grooves at the outer periphery of the fastening screw counterbore. Two convex columns are arranged symmetrically with respect to the center of the counterbore of the fastening screw. Each convex column is processed with a through bottom overflow cooling hole along its length direction. The overflow cooling hole at the bottom of the knife communicates with the counterbore of the fastening screw. The bottom surface is provided with two supporting bosses along the length direction, and the two supporting bosses are arranged symmetrically with respect to the center line of the blade bottom surface in the length direction, and the space between the two supporting bosses and the bottom surface of the blade constitutes a heat dissipation groove in the center of the knife bottom. The area surrounded by the outer surface of the support boss and the outer periphery of the bottom surface of the blade constitutes a cooling groove around the bottom of the blade. The thickness of the blade is S=8-10 mm, and the back angle α ₀ of the blade is 8°.

The beneficial effects of the utility model:

1. The utility model adopts an integral structure, and the tool is not easy to break due to the impact. Since the long cutting edge and the short cutting edge are provided, when large-scale forging blanks are rough-machined with a large depth of cut, the cutting efficiency can be improved by using the long cutting edge; Short cutting edges are used when a large depth of cut is not required, which can improve machining accuracy.

2. The double-arc tool tip adopts the double-curve arc design method, which can effectively reduce the cutting resistance during the cutting process, and pre-extrude the edge of the generated chips, thereby improving the chip breaking effect of the arc-shaped chip breaker, and can It is very good for reducing cutting noise and improving the impact resistance of the blade.

3. There are four hemispherical protrusions on the rake face of the insert adjacent to the four double-arc tool tips, which reduces the depth of the arc-shaped chip breaker at the junction of the long cutting edge and the short cutting edge. It is beneficial to the curling of small chips, and at the same time, it can effectively guide the chips generated at large cutting depths and reduce the contact area near the tool tip with chips, thereby reducing the heat transfer between the tool and chips at the tool tip.

4. Design arc-shaped chip breaker, and the chip guide wall of the arc-shaped chip-breaker (that is, the side of the protruding platform) is designed in a circular arc shape, which can not only effectively improve the strength of the arc-shaped chip-breaker and the accuracy of the cutting process, but also It can effectively curl and guide large chips, reduce the possibility of large chips swinging sideways, prevent the cutting edge of the blade and chips from causing knife-chip bonding, prolong the service life of the blade, and improve production efficiency.

5. Diversion grooves are designed around the bottom of the arc-shaped chip breaker, which effectively reduces the contact area between chips and the bottom of the arc-shaped chip breaker. At the same time, it can effectively volume cutting fluid when using cutting fluid, which is very It is best to dissipate heat and cool down the cutting area of the blade.

6. The protruding platform is evenly processed with tooth-shaped grooves on the outer periphery of the fastening screw counterbore. The tooth-shaped groove can not only hold the cutting fluid, but also make the fastening screw passing through the fastening screw counterbore hole The cap is immersed in the cutting fluid contained in the tooth-shaped groove, which plays a good role in cooling the fastening screw; at the same time, when the chips flow through here, it can make the cutting fluid form a liquid film around the tooth-shaped groove is broken, thereby forming a new cutting fluid film to cool the rake face and fasten the screw.

7. The bottom of the blade is designed with a convex column, and there is a knife bottom overflow cooling hole connected to the fastening screw hole inside. The cutting fluid and air entering the fastening screw hole can be discharged through the knife bottom overflow cooling hole, thereby Play the role of cold and heat exchange.

8. The heat dissipation groove in the center of the knife bottom passes through the fastening screw hole, which not only increases the effective heat dissipation area at the bottom of the blade, but also reduces the contact area between the blade and the knife rod, reduces the heat transfer between the blade and the knife rod, and has a large volume The function of cutting fluid.

9. There is a heat dissipation groove around the bottom of the blade, which effectively increases the heat dissipation area of the bottom of the blade, and at the same time can play a role in volume cutting fluid and drainage of cutting fluid and air discharged from the overflow cooling hole of the bottom of the blade.

10. The part where the bottom of the blade is in contact with the tool bar is designed as a supporting boss at the bottom of the knife, which reduces the contact area between the blade and the tool bar, and at the same time reduces the accuracy required for installation, and has a good anti-seismic effect.

11. The maximum cutting force that the blade of this utility model can withstand can reach 100-110KN, and the maximum cutting depth can reach 30mm, which can meet the needs of large workpiece material removal (up to tens of tons) during rough machining of ultra-large forging blanks Large depth of cut requirements. The service life of the blade of the utility model is 1.1 times that of the ordinary blade, and the processing efficiency is increased by about 30% compared with the original one.

Description of drawings

Fig. 1 is a front view of the utility model's ultra-heavy load and large depth of cut impact-resistant special blade, Fig. 2 is a top view of Fig. 1, Fig. 3 is a sectional view of A-A of Fig. 2, Fig. 4 is a bottom view of Fig. 1, and Fig. 5 It is the B-B sectional view of Fig. 4, and Fig. 6 is a three-dimensional view of the ultra-heavy load, large depth of cut and impact-resistant special blade of the present utility model.

Detailed ways

Specific Embodiment 1: As shown in Figures 1-6, the extreme super-heavy load and large depth of cut impact-resistant special blade of this embodiment, the horizontal cross-sectional shape of the blade is rectangular, and the cross-section of the blade is parallel to the length direction and The cross-sectional shape parallel to the width direction is an isosceles trapezoid, the area of the blade bottom surface is less than the area of the blade rake face, a long cutting edge 16 is processed respectively at the two long edges of the blade rake face, and the two sides of the blade rake face A short cutting edge 17 is respectively processed at the short edge, and the four corners of the rake face of the blade are respectively processed with double arc-shaped tool tips 1, and the middle part of the rake face of the blade is provided with a rectangular raised platform 15, and the raised platform 15 The area is smaller than the area of the blade rake face, and the four sides of the raised platform 15 are arc-shaped concave surfaces 18, and the area surrounded by the four arc-shaped concave surfaces 18 of the raised platform 15 and the outer periphery of the blade rake face forms an arc Chipbreaker 3, guide groove 4 is provided around the bottom of arc-shaped chipbreaker 3, and the protruding platform 15 is located at the geometric center of the rake face of the blade. The outer periphery of the fastening screw counterbore 6 is uniformly processed with tooth-shaped grooves 5, and the bottom surface of the blade is provided with two protruding posts 8 along the width direction, and the two protruding posts 8 are opposite to the center of the fastening screw counterbore 6. Symmetrically arranged, each protruding column 8 is processed along its length direction with a through knife bottom overflow cooling hole 7, the knife bottom overflow cooling hole 7 communicates with the fastening screw sink hole 6, and the bottom surface of the blade is provided with two along the length direction. Supporting boss 11, two supporting bosses 11 are arranged symmetrically with respect to the centerline of blade bottom surface length direction, the space between two supporting bosses 11 and the blade bottom surface form knife bottom center cooling groove 10, by supporting boss The area surrounded by the outer surface of 11 and the outer periphery of the bottom surface of the blade constitutes the cooling groove 9 around the bottom of the blade, the thickness S of the blade is 8-10 mm, and the relief angle α ₀ =8° of the blade (that is, the flank of the blade 13 angle with the vertical plane).

Specific embodiment two: In conjunction with Fig. 1-Fig. 3 and Fig. 5 and Fig. 6, four hemispherical protrusions 2 are provided on the rake face of the blade in this embodiment, adjacent to the four double-arc knife tips 1, and The hemispherical protrusion 2 is arranged on the diagonal line of the blade rake face. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

Embodiment 3: The blade inclination angle of the blade described in this embodiment is 0°. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

When the ultra-heavy load, large depth of cut and impact-resistant special blade of the utility model is used, the blade is fixed on the cutter bar (or cutter head) by fastening screws.

Claims (3)

1. the special-purpose blade of the big cutting-in shock resistance of a limit super-heavy load type, the horizontal cross sectional geometry of described blade is a rectangle, it is characterized in that: the cross sectional shape that described blade is parallel to the cross section of length direction and is parallel to width is isosceles trapezoid, the area of blade bottom surface is less than the area of blade rake face, two long edges of blade rake face are processed with a long cutting edge (16) respectively, two minor face edge places of blade rake face are processed with a short cutting edge (17) respectively, four bights of blade rake face are processed with two arc points of a knife (1) respectively, the middle part of blade rake face is provided with rectangular raised platform (15), the area of described raised platform (15) is less than the area of blade rake face, four sides of raised platform (15) are arc-shaped concave (18), four arc-shaped concaves (18) by raised platform (15) constitute arc chip-breaker (3) with the zone that blade rake face neighboring surrounds, arc chip-breaker (3) is provided with diversion groove (4) around the bottom, the geometric center place that is positioned at the blade rake face on the raised platform (15) is processed with trip bolt counterbore (6) along the blade thickness direction, be positioned at the uniform profile of tooth groove (5) that is processed with of outer circumference of trip bolt counterbore (6) on the raised platform (15), blade bottom surface broad ways is provided with two projections (8), two projections (8) are symmetrical arranged with respect to the center of trip bolt counterbore (6), be processed with overflow louvre (7) at the bottom of the cutter of perforation along its length direction in each projection (8), overflow louvre (7) communicates with trip bolt counterbore (6) at the bottom of the cutter, the blade bottom surface is provided with two support rims (11) along its length, two support rims (11) are symmetrical arranged with respect to the center line of blade bottom surface length direction, center radiating groove (10) at the bottom of the formation cutter between space between two support rims (11) and the blade bottom surface, the zone that is surrounded by the lateral surface and the neighboring, blade bottom surface of support rim (11) constitutes cutter bottom perimeter radiating groove (9), thickness S=8～the 10mm of described blade, the relief angle α of described blade ₀=8 °.

2. according to the special-purpose blade of the big cutting-in shock resistance of the described limit super-heavy load of claim 1 type, it is characterized in that: four two arc points of a knife (1) of next-door neighbour locate to be provided with four hemispherical projections (2) on the described blade rake face, and hemispherical projections (2) is arranged on the diagonal of blade rake face.

3. according to the special-purpose blade of the big cutting-in shock resistance of the described limit super-heavy load of claim 2 type, it is characterized in that: the cutting edge inclination of described blade is 0 °.

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