CN209736718U - jacking coring tool - Google Patents

Abstract

the utility model relates to a jacking coring tool, including the cutter body, set up the coring hole that extends along the axis direction of cutter body on the terminal surface of cutter body tip, the tip of cutter body is rotatable to be provided with two at least blades at the side of coring hole, the face that the blade of blade is located and the axis of cutter body are on the coplanar, the distance between the tip portion of blade and the rotation axle center of blade is L1, the perpendicular distance from rotation axle center to cutter body axis is L2, and L1 > L2; the blade comprises a blade head part and a blade tail part, and the cutting edges comprise an outer cutting edge arranged on the outer side edge of the blade head part and an inner cutting edge arranged on the inner side edge of the blade head part; the blade rotates and simultaneously performs the composite motion of axial feeding and circumferential feeding to cut the core material of the workpiece; the utility model overcomes cutting inefficiency in the core material cutting process, cutting stability is poor, and the blade damages the problem that life is short easily.

Description

A nesting coring tool

technical field

The utility model relates to the technical field of metal cutting, in particular to a coring cutter for nesting materials.

Background technique

The nesting drill has been widely used in the field of mechanical processing. Compared with ordinary drills, the nesting drill has many advantages: the nesting drill can save material, leave the material core, and reduce the power consumption of the machine tool.

Although the nesting drill has many advantages, when the hole of the machined part is a blind hole and cannot be drilled through as a whole, the ordinary nesting drill cannot achieve the effect of drilling through the workpiece and directly drill a large hole, and the normal nesting drill cannot drill through Large holes need to be expanded slowly with a small drill bit, boring tool or drilled with a solid drill bit, which greatly reduces the processing efficiency and requires relatively high power of the machine tool.

A Chinese utility model patent with the authorized announcement number CN203316797U discloses a trepanning drill, which includes two parts: a trepanning drill assembly and a handle assembly. The time for tool replacement is also reduced, which improves the processing efficiency. Using the nesting drill, the core left by the nesting material falling into the hole of the cutter body can continue to be used, saving materials.

But it has the following problems: when it processes large blind holes in parts, it cannot achieve the processing purpose alone, and it is only suitable for processing through holes.

Utility model content

The purpose of this utility model is to provide a nesting coring cutter for the deficiencies of the prior art. Two blades are arranged on the cutter body, and the cutting edge of the blade includes an outer cutting edge and an inner cutting edge. The mouths form a certain angle, which overcomes the problems of low cutting efficiency, poor cutting stability, easy damage to the blade and short service life during the core material cutting process.

In order to achieve the above object, the utility model provides the following technical solutions:

A nesting coring cutter, comprising a cutter body, a core hole extending along the axial direction of the cutter body is provided on the end surface of the cutter body, and the end of the cutter body can be positioned on the side of the core hole Rotation is provided with at least two blades, the surface where the cutting edge of the blade is located is on the same plane as the axis of the cutter body, the distance between the tip of the cutting edge and the rotation axis of the blade is L1, and the rotation The vertical distance from the shaft center to the axis of the cutter body is L2, and L1>L2; the blade includes a cutter head and a cutter tail, and the cutting edge includes an outer cutting edge arranged on the outer side of the cutter head and an outer cutting edge arranged on the cutter head the inner cutting edge of the inner side of the part;

When the blade rotates, it performs a compound motion of axial feeding and circular feeding to complete the cutting of the core material of the workpiece.

As a preference, the blade is set in an arc shape, the outer side of the cutter head of the blade is set in a circular arc shape, and the angle formed between the outer cutting edge and the inner cutting edge is a1, and 75°<a1 <85°, preferably 80°, at this angle the cutting feed of the blade is smoother, the life of the blade is longer and the load on the lathe is smaller.

As a preference, the maximum distance between the blade and the axis of the cutter body is L3, the radius of the machining hole of the workpiece is r, and L3<r.

As a preference, the core hole is arranged coaxially with the cutter body, and the radius of the core hole is r1, the minimum distance between the blade and the axis of the cutter body is L4, and L4≥r1.

As a preference, the blades are arranged in an array along the circumferential direction of the cutter body.

As a preference, the end of the cutter body is provided with a blade groove and a positioning pin hole passing through the blade groove, a positioning pin is arranged in the positioning pin hole, and the blade is rotatably arranged in the blade groove through the positioning pin .

As a preference, the front end of the cutter body is further provided with a locking screw hole, and a locking screw is provided in the locking screw hole, and the positioning pin is fixed in the positioning pin hole by the locking screw.

As yet another preference, the tip portion is set as a rounded corner, and the radius of the rounded corner is r2, and 0.7<r2≤0.8, preferably 0.8.

The beneficial effect of this embodiment:

1. In the utility model, by setting two blades on the cutter body, the processing efficiency of cutting the core material is greatly improved, and the cutting edge of the blade includes an outer cutting edge and an inner cutting edge, and the distance between the two cutting edges is fixed. The angle reduces the resistance of the blade cutting circular feed, reduces the force on the blade, makes cutting the core material smoother and improves the service life of the blade.

2. The utility model arranges two blades and the two blades are arranged in an array, so that the force is uniform during the processing, the stability of cutting is improved, the blade is further prevented from being easily damaged, and its service life is improved.

3. In the utility model, by setting the blade in an arc shape and having a large bending angle, the cross-sectional area of the cutting is smaller when it is cut in a circular feed, so that the cutting is more labor-saving, and the waste generated by cutting is less, leaving less waste. The core material that comes down is more.

To sum up, the device has the advantages of simple structure, good use efficiency, and improved processing efficiency, and is especially suitable for the technical field of metal cutting tools.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the schematic front view of the nesting coring tool;

Fig. 2 is a schematic side view of a nesting coring tool;

FIG. 3 is an enlarged schematic diagram of A in FIG. 1;

Fig. 4 is a schematic diagram of the installation relationship between the blade and the cutter body;

Fig. 5 is the structural representation of blade;

Fig. 6 is a schematic cross-sectional view of the cutter body;

Fig. 7 is the structural representation of workpiece;

Fig. 8 is a schematic diagram of the state when the tool feed blade enters the annular groove of the machining hole;

Fig. 9 is a schematic diagram of the state when the blade contacts the bottom of the annular groove of the machining hole;

Detailed ways

The technical solutions in the embodiments of the utility model are clearly and completely described below in conjunction with the accompanying drawings.

Embodiment one

As shown in Fig. 1 to Fig. 9, what is provided in this embodiment is a nesting coring cutter, including a cutter body 1, the end surface of the end of the cutter body 1 is provided with a The core hole 2, the end of the cutter body 1 is rotatably provided with at least two blades 3 on the side of the core hole 2, and the surface where the cutting edge 31 of the blade 3 is on the same axis as the cutter body 1 On the plane, the distance between the tip 313 of the cutting edge 31 and the rotation axis 30 of the blade 3 is L1, the vertical distance between the rotation axis 30 and the axis of the cutter body 1 is L2, and L1>L2; The blade 3 includes a cutter head 32 and a cutter tail 33, and the cutting edge 31 includes an outer cutting edge 311 arranged on the outer side of the cutter head 32 and an inner cutting edge 312 arranged on the inner side of the cutter head 32;

The blade 3 performs a compound movement of axial feeding and circular feeding while rotating, and completes cutting of the core material 41 of the workpiece 4 .

It is worth mentioning that in this embodiment, two blades 3 are arranged on the cutter body 1, and the cutting edge of the blade 3 includes an outer cutting edge 311 and an inner cutting edge 312, and a certain angle is formed between the two cutting edges. Furthermore, the processing efficiency of cutting the core material is greatly improved, and the stress on the blade is reduced, thereby improving the service life of the blade.

Further, the blade 3 is set in an arc shape, the outer side of the cutter head 32 of the blade 3 is set in a circular arc shape, and the angle formed between the outer cutting edge 311 and the inner cutting edge 312 is a1, and a1 =80°.

It should be pointed out that by setting the blade in an arc shape and a large bending angle, the cross-sectional area of the cutting is smaller when it is cut in the circular feed, so that the cutting is more labor-saving and the waste generated by the cutting is less. More core material remains.

Further, the maximum distance between the blade 3 and the axis of the cutter body 1 is L3, the radius of the machining hole 42 of the workpiece 4 is r, and L3<r.

Further, the core hole 2 is arranged coaxially with the cutter body 1, and the radius of the core hole 2 is r1, and the minimum distance between the blade 3 and the axis of the cutter body 1 is L4, and L4≥r1.

Further, the blades 3 are arranged in an array along the circumferential direction of the cutter body 1 .

In addition, in this embodiment, by setting two blades 3 and the two blades 3 are arranged in an array, the force in the process of processing is uniform, the stability of cutting is improved, and the blade 3 is prevented from being easily damaged. its service life.

Furthermore, the tip portion 313 is set as a rounded corner, the radius of the rounded corner is r2, and r2=0.8.

It should be pointed out that, by setting the angle of the cutting edge and the outer edge of the cutter head of the blade as a circular arc, the ends of the two blades can automatically move along with the feed of the guide rod when cutting the core material. Close to the middle to realize the complete cutting of the core material, the structure is simple and ingenious.

Embodiment two

As shown in FIG. 1 , the parts that are the same as or corresponding to those in the first embodiment use the corresponding reference numerals. For the sake of simplicity, only the differences from the first embodiment will be described below. The difference between the second embodiment and the first embodiment is that: the end of the cutter body 1 is provided with a blade groove 11 and a positioning pin hole 12 passing through the blade groove 11, and a positioning pin is arranged in the positioning pin hole 12 13. The blade 3 is rotatably arranged in the blade groove 11 through the positioning pin 13 .

Further, the front end of the cutter body 1 is also provided with a locking screw hole 14, and a locking screw 15 is arranged in the locking screw hole 14, and the positioning pin 13 is fixed in the positioning pin hole by the locking screw 15. within 12.

In this embodiment, the blade 3 is installed in the blade groove 11, so it can only rotate along the direction of the blade groove 11 without shaking up and down, and has high stability. In addition, the positioning pin 13 is fixed in the positioning pin hole 12 by the locking screw 15 , improve structural stability and facilitate disassembly and assembly.

work process:

Before the nesting coring tool is processed, a pre-hole for nesting processing is required. The reserved core material 41 is smaller than the core hole 2 of the nesting coring tool, and the inner hole is larger than the outer circle of the nesting coring tool. During processing, The tool does not rotate first, and slowly extends the front end of the tool rod into the hole. After the blade 3 is inserted into the hole, the tool rotates and the tool rod advances. When the blade 3 reaches the bottom of the hole, due to the arc design of the front end of the blade 3, the knife When the rod continues to move forward, the bottom of the hole will push the cutting edge of the blade 3 to cut the core material until the core material is completely cut off;

What needs to be pointed out here is that the nesting coring cutter with the core hole 2 radius r1 can handle workpieces with a core material 41 radius smaller than r1, and when dealing with some workpieces with a larger core material 41 radius, it can be replaced by a larger core tool. Core hole 2 radius tool holder for processing;

In addition, when the blade 3 abuts against the bottom of the annular groove of the machining hole as shown in Figure 9, the stroke of the tool to continue feeding is equal to the distance in the horizontal direction between the tip 311 of the blade 3 and the cutting point at this time, which can be measured by measuring the distance to set the feed rate of the tool.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (8)

1. The utility model provides a jacking coring tool, includes cutter body (1), its characterized in that: the end face of the end part of the cutter body (1) is provided with a coring hole (2) extending along the axis direction of the cutter body (1), the end part of the cutter body (1) is rotatably provided with at least two blades (3) at the side edge of the coring hole (2), the surface where the cutting edges (31) of the blades (3) are positioned and the axis of the cutter body (1) are on the same plane, the distance between the tip parts (313) of the cutting edges (31) and the rotating shaft center (30) of the blades (3) is L1, the perpendicular distance between the rotating shaft center (30) and the axis of the cutter body (1) is L2, and L1 is more than L2; the blade (3) comprises a blade head part (32) and a blade tail part (33), and the cutting edge (31) comprises an outer cutting edge (311) arranged on the outer side edge of the blade head part (32) and an inner cutting edge (312) arranged on the inner side edge of the blade head part (32);

The blade (3) rotates and simultaneously performs composite motion of axial feeding and circumferential feeding to cut the core material (41) of the workpiece (4).

2. A trepanning coring tool as set forth in claim 1, wherein: the blade (3) is arc-shaped, the outer side edge of the head part (32) of the blade (3) is arc-shaped, an angle a1 is formed between the outer cutting edge (311) and the inner cutting edge (312), and 75 degrees < a1<85 degrees.

3. A trepanning coring tool as set forth in claim 1, wherein: the maximum distance from the blade (3) to the axis of the cutter body (1) is L3, the radius of the machining hole (42) of the workpiece (4) is r, and L3< r.

4. A trepanning coring tool as set forth in claim 1, wherein: the coring hole (2) and the cutter body (1) are coaxially arranged, the radius of the coring hole (2) is r1, the minimum distance from the blade (3) to the axis of the cutter body (1) is L4, and L4 is not less than r 1.

5. A trepanning coring tool as set forth in claim 1, wherein: the blades (3) are arranged in an array along the circumferential direction of the cutter body (1).

6. A trepanning coring tool as set forth in claim 1, wherein: the cutter body (1) is characterized in that a blade groove (11) and a positioning pin hole (12) penetrating through the blade groove (11) are formed in the end portion of the cutter body (1), a positioning pin (13) is arranged in the positioning pin hole (12), and the blade (3) is rotatably arranged in the blade groove (11) through the positioning pin (13).

7. A trepanning coring tool as set forth in claim 6, wherein: the cutter body (1) is characterized in that a locking screw hole (14) is further formed in the front end portion of the cutter body (1), a locking screw (15) is arranged in the locking screw hole (14), and the positioning pin (13) is fixed in the positioning pin hole (12) through the locking screw (15).

8. A trepanning coring tool as set forth in claim 1, wherein: the tip part (313) is set to be a round angle, the radius of the round angle is r2, and r2 is more than 0.7 and less than or equal to 0.8.