TWI737115B - The spray structure of turning tool chip breaking - Google Patents

Abstract

The present invention is equipped with a blade and a liquid spray structure on a turning tool. The blade has a blade tip, and the blade tip is adjacent to the gathering place of a first side surface and a second side surface on a top surface of the blade. The liquid spray structure is arranged in a flow channel of the turning tool, along a liquid spray direction staggered on the first side surface, and the flow channel is provided with an outlet to guide the high-pressure liquid to be sprayed to the top surface of the blade, turning to a workpiece to be turned The knife cuts out a surface of metal shavings, even if the pressure of the liquid is not increased, the metal shavings can be easily broken into a number of short chip breaks, which effectively solves the problem of vibration of the workpiece.

Description

The spray structure of turning tool chip breaking

The invention relates to chip breaking technology in the cutting field, in particular to a liquid spray structure. When used for turning tool cutting, the broken metal chips no longer extend continuously.

Figure 4 is a plan view showing the specific structure of a known turning tool 90. The turning tool 90 has a tool bar 91 with a blade 92 and a pressure plate 94. A fastener 95 passes through the pressure plate 94 and is locked into the tool bar 91, so that the pressure plate 94 presses the blade 92. The pressure plate 94 forms an outlet 96, and a straight liquid spray direction 97 is drawn from the outlet 96 to a tip 93 of the blade 92, which represents the spray direction of the high-pressure liquid.

Figure 5 is a plan view showing the turning tool 90 performing cutting operations. During cutting, the tool bar 91 feeds a certain distance along the axis of a workpiece 10. A supporting section 11 of the workpiece 10 drives a section 12 to be cut to rotate stably. Therefore, the tip 93 of the blade 92 cuts a piece of metal shavings 13 on the inner circumferential surface 16 of the segment 12 to be cut, and the metal shavings 13 are accumulated on the blade 92 like a spirally-wound belt. Following the spray direction, the high-pressure liquid 98 is sprayed out of the outlet 96 of the pressing plate 94, facing the front of the tool tip 93 and impacting the metal chips 13 to break into more than one long chip 14 to prevent the machining quality of the workpiece 10 from being affected by the metal chips 13.

FIG. 6 is an end view, showing that the edge 15 of the metal chip 13 cuts the columnar high-pressure liquid 98 like a knife edge to form two split streams 99. These split streams 99 impact the circumferential surface 16 of the section 12 to be cut, causing the workpiece 10 to vibrate.

In fact, the finer the processing, the thinner the edge 15 of the metal chip 13, which not only has a small area of force, but also extends the length of the chip. Moreover, during the chattering period, the cutting circumferential surface 16 of the blade 92 is uneven, which cannot meet the machining accuracy requirements, resulting in the workpiece 10 becoming a defective product and being returned by the quality control personnel.

Secondly, technicians in the cutting field fall into a misunderstanding, thinking that the pressure (ie, pressure strength) of the high-pressure liquid 98 rises to 240 bar (Bar), and the metal chips 13 can be easily broken, which is enough to shorten the length of chip breaking. However, the disadvantage of cutting the high-pressure liquid 98 by the edge 15 of the metal shavings 13 has not disappeared.

Therefore, how to overcome the dilemma encountered by the chip breaking of the turning tool has become an urgent problem to be solved in the present invention.

In view of this, the inventor of the present case proposes a liquid spray structure, the main purpose of which is to adopt a structure that presses a larger area of metal chips. Even if the pressure of the liquid is not increased, the metal chips can be easily broken, which not only reduces the chip breaking length, but also Effectively solve the drawbacks of workpiece chattering.

Due to the achievement of the above-mentioned object, the liquid spray structure of the present invention includes: a turning tool; The gathering place on the two sides; and, a flow channel is arranged on the turning tool, and an outlet of the flow channel is arranged along a spray direction staggered on the first side.

Among them, draw a virtual straight line passing through the tip of the tool, which is perpendicular to the length direction of the turning tool and forms an angle equal to or less than 45° with the direction of spraying.

Furthermore, the flow channel is formed inside the turning tool, which can guide the high-pressure liquid through the outlet. The high-pressure liquid is sprayed to the top surface of the blade in the spray direction, turning to a workpiece surface where a metal chip is cut by the turning tool.

In addition, the turning tool is provided with a protruding part that exceeds the top surface of the blade, and the outlet of the flow channel is arranged at the position where the protruding part faces the blade according to the spray direction.

In this way, according to the spray direction of the liquid spray structure of the present invention, the outlet of the flow channel guides the high-pressure liquid to hit the surface of the metal chips, rather than the side with a small area. Even if the pressure of the liquid is not increased, the metal chips can be easily broken into a few short pieces. Chip breaking effectively solves the drawbacks of workpiece chattering.

In order to make the purpose, structure, features, and advantages of the present invention more simple and understandable, one or more preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

Figure 1 is a top view, drawing the specific structure of a turning tool 20, which is composed of a tool bar 21, a blade 30 and a liquid spray structure.

In this embodiment, a fastener 31 is locked into the knife bar 21 through the blade 30 to fix the blade 30 to the front end of the knife bar 21. Wherein, a top surface 34 of the blade 30 is adjacent to a gathering place of a first side surface 35 and a second side surface 36 and is defined as a cutting edge 32 of the blade 30. The cutter bar 21 also has a raised portion 22 which extends beyond the top surface 34 of the blade 30.

In some embodiments, there are no fasteners. Using welding means, the tool bar 21 and the blade 30 made of metal are joined together.

The liquid spray structure referred to here refers to a flow channel 23 provided in the turning tool 20. Specifically, the flow channel 23 is formed inside the cutter bar 21 and faces the blade 30 through the raised portion 22 along a virtual spray direction 25. The spray direction 25 is staggered to the position where the first side 35 of the blade 30 is adjacent to the tip 32. Draw a virtual straight line 37 passing through the tool tip 32. The straight line 37 is perpendicular to the length direction of the turning tool 20 and forms an included angle 33 equal to or less than 45° with the spray direction 25. Therefore, the hole through which the flow channel 23 passes through the surface of the protruding portion 22 is regarded as an outlet 24.

FIG. 2 is a plan view showing that the turning tool 20 turns the inner diameter of the workpiece 10. During cutting, the supporting section 11 drives the section 12 to be cut to rotate. At this moment, the tool bar 21 is fed a certain distance along the axis of the workpiece 10, and the tip 32 of the supporting blade 30 turns the circumferential surface 16 of the section to be cut 12 to form metal shavings 13 extending a certain length like a crimped belt.

In the figure, the high-pressure liquid 26 passes through the inside of the cutter bar 21 via the flow channel 23, and is sprayed out from the outlet 24 of the bulge 22 like a fluid column, breaking the metal chips 13 to form more than one short chip 14A. In addition, the first side surface 35 faces the circumferential surface 16 of the to-be-cut section 12, which is adjacent to the root of the metal chip 13. The second side 36 faces the supporting section 11 of the workpiece 10.

Figure 3 is an end view, showing that the high-pressure liquid 26 is sprayed toward the first side 35 and falls on the top surface 34 of the blade 30 at a position about 1.5mm away from the tip 32. The surface 17 turning to the metal shavings 13 generates a continuous impact force, causing The chip breaking length is shorter than the previous technology.

In this way, the high-pressure liquid 26 avoids the small-area side 15 and uses the metal chips 13 as the main force to avoid and/or reduce the impact of the high-pressure liquid 26 on the section 12 to be cut, effectively solving the chattering of the workpiece 10 .

In other words, even if the high-pressure liquid 26 with a pressure of 70 bar continuously impacts the surface 17 of the metal shavings 13, it can easily break the metal shavings 13 to form a short-length chip.

<Prior Art> Workpiece 10 Support section 11 Section to be cut 12 Metal shavings 13 Long chipping 14 Side 15 Circumference 16 Car knife 90 Knife rod 91 Blade 92 Blade tip 93 Pressure plate 94 Fastener 95 Exit 96 Spray direction 97 High-pressure liquid 98 Diversion 99 <this invention> Short chipping 14A Face 17 Turning tool 20 Tool lever 21 Uplifting Department 22 Runner 23 Exit 24 Liquid spray direction 25 High pressure liquid 26 Blade 30 Fastener 31 Tip of the knife 32 Angle 33 Top side 34 First side 35 The second aspect 36 Straight line 37

Figure 1 shows a turning tool with the liquid jet structure of the present invention from a top view. Figure 2 depicts the use of the spray structure on the metal chips cut from the workpiece. Figure 3 zooms in on the chip breaking state of the liquid jet structure. Figure 4 shows the structure of a known turning tool. Figure 5 shows the state of use of the turning tool in Figure 4 for cutting the workpiece. Figure 6 zooms in on the chip breaking state of the prior art cutting.

Workpiece 10 Segment to be cut 12 Metal shavings 13 Edge 15 Area 17 Car knife 20 Knife 21 Protruding part 22 Exit 24 High-pressure liquid 26 Blade 30 Blade tip 32 Top side 34 First side 35 Second side 36

Claims (8)

A liquid spray structure for chip breaking of a turning tool, comprising: a turning tool (20); a blade (30) fixed to the turning tool (20), the blade (30) has a tip (32), and the tip ( 32) A top surface (34) of the blade (30) is adjacent to the gathering place of a first side surface (35) and a second side surface (36); and a runner (23) is provided on the turning tool (20), the An outlet (24) of the flow channel (23) is arranged along a liquid spray direction (25) staggered to the first side surface (35). For example, the liquid jet structure for chip breaking of the turning tool described in the scope of the patent application, in which a virtual straight line (37) passing through the tool tip (32) is drawn, and the straight line (37) is perpendicular to the length direction of the turning tool (20) , And form an angle (33) with the spray direction (25). Such as the liquid spray structure for chip breaking of the turning tool described in the scope of the patent application, wherein the included angle (33) is equal to or less than 45°. For example, the liquid jet structure for chip breaking of the turning tool described in item 1, 2 or 3 of the scope of patent application, wherein the flow channel (23) is formed inside the turning tool (20) to guide the high-pressure liquid (26) through the outlet (24) ), the high-pressure liquid (26) is sprayed to the top surface (34) of the blade (30) in the spray direction (25), turning to a workpiece (10) to be cut out by the turning tool (20) to a surface of metal chips (13) (17). For example, the liquid spray structure for chip breaking of the turning tool described in the scope of patent application, wherein the high-pressure liquid (26) falls on the top surface (34) of the blade (30) at a position about 1.5 mm from the tip (32). For example, the liquid spray structure for chip breaking of the turning tool described in item 1, 2 or 3 of the scope of patent application, wherein the turning tool (20) has a raised portion (22) that exceeds the top surface (34) of the insert (30), and The outlet (24) of the flow channel (23) is arranged at the position where the protruding part (22) faces the blade (30) according to the spray direction (25). For example, the liquid spray structure for chip breaking of the turning tool described in the scope of the patent application, wherein the flow channel (23) is formed inside the turning tool (20) to guide the high-pressure liquid (26) through the outlet (24). The liquid (26) is sprayed to the top surface (34) of the blade (30) according to the spray direction (25), and is turned to a workpiece (10) where a metal chip (13) is cut out by a turning tool (20). For example, the liquid spray structure for chip breaking of the turning tool described in the scope of the patent application, wherein the high-pressure liquid (26) falls on the top surface (34) of the blade (30) at a position about 1.5 mm from the tip (32).

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