Cutter made of super hard alloy

Abstract

The utility model discloses a super hard alloy cutter, which relates to the field of PCD cutters, and comprises a cutter body, a plurality of cutter grooves arranged around the edge of the front end of the cutter body, a blade arranged on one side of each cutter groove, a liquid channel arranged in the cutter body and penetrating through the front end of the cutter body, a liquid spraying end cap in threaded connection with the front end of the cutter body, and a spherical layer channel arranged on the liquid spraying end cap and communicated with the liquid channel. Cutting liquid is guided into the spherical layer channel at the end of the cutter body through the built-in liquid channel, the cutting liquid is sprayed to the blade by the edge of the spherical layer channel, and the spraying direction is close to the cutting liquid discharging direction, so that a stable conduction direction is formed; the continuously sprayed cutting fluid can be fully contacted with a cutter to absorb heat and then is quickly discharged, so that a stable heat dissipation effect is ensured, the phenomenon of mixed flow and liquid accumulation is avoided, and the cutting fluid can outwards scour cuttings to promote the discharge of the cuttings.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of PCD cutter especially relates to a cutter of superhard alloy. BACKGROUND

[0002] PCD reamer as superhard alloy cutter is used for the surface of precision machining hole spare, needs to inject cutting fluid to reduce the temperature of blade position in the working process of PCD reamer, and the liquid passage is arranged in the cutter body of existing reamer, and the liquid hole is inclined to the cutter head direction and points to the blade, and the cutting fluid is inclined to spray on the blade surface and cools the blade, and the cutting fluid is sprayed and discharged from the end of the cutter insertion hole, and the cutting fluid is sprayed and discharged in the opposite direction, and a large amount of mixed flow is generated in the blade position, and the cutting fluid is not easy to make the cutting fluid uniformly contact the blade and fully absorb the heat, and in addition, the cutting fluid spraying has certain hindrance to the discharge of the cutting chip. SUMMARY

[0003] The utility model discloses a cutter of superhard alloy, and solve the problem that the cutting fluid cooling is uneven and the cutting chip discharge is hindered due to the opposite direction of built-in spraying cutting fluid of existing cutter.

[0004] To solve the problems in the prior art, the technical scheme of the utility model is as follows:

[0005] A cutter of superhard alloy, comprising a cutter body, a plurality of cutter grooves are formed around the front end edge of the cutter body, a blade is arranged on one side of the cutter groove, the cutter body has a liquid channel passing through the front end thereof, a liquid injection end cap is threadedly connected to the front end of the cutter body, the liquid injection end cap has a spherical layer channel communicating with the liquid channel, and the edge of the spherical layer channel is inclined to the rear end of the cutter body and points to the blade.

[0006] Preferably, the liquid injection end cap comprises an outer spherical shell and an inner spherical shell, the spherical layer channel is formed between the outer spherical shell and the inner spherical shell, a straight-through pipe is fixed at the center position of the inner spherical shell, the straight-through pipe is threadedly connected to the cutter body, and the liquid channel and the spherical layer channel are communicated through the straight-through pipe.

[0007] Preferably, a plurality of partition strips are annularly distributed between the outer spherical shell and the inner spherical shell, and the inner end of the partition strip is inclined to the rotation direction of the cutter body.

[0008] Preferably, a curved shell is arranged between the inner spherical shell and the end face of the cutter body, and the outer surface of the curved shell is inclined to the direction of the blade.

[0009] Preferably, the screwing direction of the straight-through pipe and the cutter body is opposite to the rotation direction of the cutter body.

[0010] Preferably, the cutter body comprises an axially aligned cutter rod and a connecting rod, the cutter rod and the connecting rod are aligned in a plug-in manner, and the plug-in part of the cutter rod and the connecting rod is locked by a radially inserted screw.

[0011] Preferably, the outer wall of the connecting rod is provided with a ring groove, the ring groove is communicated with the liquid channel through a liquid hole, a ring sleeve is rotatably arranged outside the connecting rod, the ring sleeve seals the ring groove, and the surface of the ring sleeve is provided with a pipeline penetrating through the ring groove.

[0012] Compared with the related art, the utility model has the advantages of the following:

[0013] The cutting fluid is introduced into the spherical layer channel at the end of the cutter body through the built-in liquid channel, the edge of the spherical layer channel sprays the cutting fluid to the cutting blade, the spraying direction is close to the discharging direction of the cutting fluid, a stable conduction direction is formed, the continuously sprayed cutting fluid can be rapidly discharged after fully contacting the cutting tool and absorbing heat, stable heat dissipation effect is ensured, the phenomenon of mixed flow and liquid accumulation is avoided, and the cutting fluid can flush the cutting chips outward to promote the discharge of the cutting chips. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model.

[0015] Figure 2 It is a cutter body structure schematic view of the utility model.

[0016] Figure 3 It is a liquid spraying end cap structure schematic view of the utility model.

[0017] Figure 4 It is a baffle strip distribution structure schematic view of the utility model.

[0018] Figure 5 It is a ring sleeve and ring groove alignment structure schematic view of the utility model.

[0019] Reference signs: 1, cutter bar; 2, connecting rod; 21, ring groove; 22, liquid hole; 3, cutter groove; 4, cutting blade; 5, liquid spraying end cap; 51, outer spherical shell; 52, inner spherical shell; 53, spherical layer channel; 54, straight-through pipe; 55, curved shell; 56, baffle strip; 6, liquid channel; 7, ring sleeve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples.

[0021] For example, Figure 1 , Figure 2As shown, the cutting fluid conduction method of the supercarbide tool is based on the internal conduction. The tool body is composed of a tool holder 1 and a connecting rod 2. The tool holder 1 and the connecting rod 2 are axially aligned, and the connecting rod 2 is axially inserted into the end face of the tool holder 1. The screw passes through the tool holder 1 and the connecting rod 2 and is threaded to lock the tool holder 1 and the connecting rod 2 into one piece. Multiple tool grooves 3 are evenly opened in a ring on the front edge of the tool holder 1. A cutting tool 4 is fixed on the same side of each tool groove 3.

[0022] Connecting rod 2 connects to the drive device and is used to drive connecting rod 2 and tool bar 1 to rotate as a whole. The end of tool bar 1 gradually penetrates into the hole and performs precision cutting on the inner wall of the hole through the blade 4. The chips are discharged out of the hole along the guide of the tool groove 3.

[0023] like Figure 2 , Figure 3 As shown, a liquid channel 6 is opened at the axis of the connecting rod 2 and the cutter bar 1. The liquid channel 6 passes through the end face of the cutter bar 1. The liquid spraying end cap 5 includes an outer spherical shell 51 and an inner spherical shell 52. A spherical layer channel 53 is formed between the outer spherical shell 51 and the inner spherical shell 52. A straight tube 54 is fixed at the center of the inner spherical shell 52. The end face of the cutter bar 1 has a threaded groove for aligning the liquid channel 6. The straight tube 54 is threadedly fixed in the threaded groove, so that the liquid channel 6 is connected to the spherical layer channel 53 through the straight tube 54. The edge of the spherical layer channel 53 is inclined towards the connecting rod 2 and points towards the blade 4.

[0024] like Figure 5 As shown, an annular groove 21 is opened on the outer wall of the connecting rod 2. The annular groove 21 is connected to the liquid channel 6 through the liquid hole 22. The ring sleeve 7 is rotatably installed on the outside of the connecting rod 2 through the bearing. The annular groove 21 is closed by the ring sleeve 7. The surface of the ring sleeve 7 has a pipe that passes through the annular groove 21. The pipe is connected to the external cutting fluid supply mechanism.

[0025] When machining the inner wall of the hole, the cutting fluid is transported through the annular groove 21, the fluid hole 22, the fluid channel 6, and the straight pipe 54 into the spherical layer channel 53. The cutting fluid is sprayed obliquely onto the surface of the cutting tool 4 through the edge of the spherical layer channel 53. The spray direction of the cutting fluid is close to the discharge direction, forming a stable conduction direction. This allows the continuously sprayed cutting fluid to fully contact the tool, absorb heat, and then be quickly discharged, ensuring a stable heat dissipation effect and preventing the phenomenon of mixed flow and accumulation of fluid. In addition, the cutting fluid can flush the chips outward, promoting chip discharge.

[0026] like Figure 4 As shown, several spacers 56 are distributed in a ring between the outer spherical shell 51 and the inner spherical shell 52. The inner ends of the spacers 56 are inclined in the direction of the rotation of the tool body. When performing rotating chip cutting, the cutting fluid enters the center of the spherical layer channel 53 through the straight pipe 54. The cutting fluid is evenly dispersed through each spacer 56 and sprayed obliquely onto each blade 4, thereby improving the uniformity of the cutting fluid diffusion.

[0027] likeFigure 3 As shown, the curved shell 55 is arranged between the inner spherical shell 52 and the end face of the tool body, the curved shell 55 is integrally fixed with the inner spherical shell 52, the outer surface of the curved shell 55 is inclined to the direction of the blade 4, the curved shell 55 improves the stress intensity of the inner spherical shell 52, avoids forming a chip removal dead angle between the inner spherical shell 52 and the end face of the tool bar 1, and enables the chip to be quickly discharged,

[0028] The straight-through pipe 54 is screwed in the direction opposite to the rotating direction of the tool body, so as to avoid loosening of the straight-through pipe 54 during the rotation of the tool body.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A superhard alloy cutter comprising a cutter body, a plurality of cutter grooves (3) being formed around the front end edge of the cutter body, a cutting insert (4) being arranged on one side of the cutter grooves (3), characterized in that, The cutter body has a liquid channel (6) through the front end thereof, the front end of the cutter body is threadedly connected with a liquid injection end cap (5), the liquid injection end cap (5) has a spherical layer channel (53) communicating with the liquid channel (6), the edge of the spherical layer channel (53) is inclined to the rear end of the cutter body and points to the blade (4); The liquid injection end cap (5) comprises an outer spherical shell (51) and an inner spherical shell (52), the spherical layer channel (53) is formed between the outer spherical shell (51) and the inner spherical shell (52), a straight-through pipe (54) is fixed at the center of the inner spherical shell (52), the straight-through pipe (54) is threadedly connected with the cutter body, and the liquid channel (6) is communicated with the spherical layer channel (53) through the straight-through pipe (54).

2. The super-hard alloy tool according to claim 1, characterized in that, A plurality of partition strips (56) are annularly distributed between the outer spherical shell (51) and the inner spherical shell (52), and the inner end of each partition strip (56) is inclined to the rotation direction of the cutter body.

3. The super-hard alloy tool according to claim 1, wherein A curved shell (55) is arranged between the inner spherical shell (52) and the end face of the cutter body, and the outer surface of the curved shell (55) is inclined to the direction of the blade (4).

4. The super-hard alloy tool according to claim 1, wherein The thread tightening direction of the straight-through pipe (54) and the cutter body is opposite to the rotation direction of the cutter body.

5. The super-hard alloy tool according to claim 1, wherein The cutter body comprises an axially aligned cutter rod (1) and a connecting rod (2), the cutter rod (1) and the connecting rod (2) are aligned by means of insertion, and the insertion part of the cutter rod (1) and the connecting rod (2) is locked by means of a radially inserted screw.

6. The super-hard alloy tool according to claim 5, wherein An annular groove (21) is formed in the outer wall of the connecting rod (2), the annular groove (21) is communicated with the liquid channel (6) through a liquid hole (22), a ring sleeve (7) is rotatably arranged outside the connecting rod (2), the ring sleeve (7) seals the annular groove (21), and the surface of the ring sleeve (7) has a pipeline communicating with the annular groove (21).

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