CN216265331U

CN216265331U - Honing stick

Info

Publication number: CN216265331U
Application number: CN202122309249.9U
Authority: CN
Inventors: 丁识科
Original assignee: Ningbo Yuhong Tools Co ltd
Current assignee: Ningbo Yuhong Tools Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-12
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a honing stick, include: the drilling tool comprises a working part and a tool shank part which are coaxially arranged, one end of the working part is connected with the tool shank part, the other end of the working part is a working end for drilling, the end face of the working end is a smooth plane, and the diameter D of the end face is less than or equal to 4 mm. According to the honing rod provided by the embodiment of the utility model, the end surface of the working end is formed into a smooth plane, namely, the end surface of the working end of the honing rod does not need to be provided with the positioning holes, so that the size of the end surface of the working end of the honing rod can be designed to be relatively small, the size precision of the honing rod is improved, and holes with smaller and finer sizes can be formed when the honing rod is drilled, so that the practicability and the processing precision of the honing rod are improved.

Description

Honing stick

Technical Field

The utility model relates to the field of machining, in particular to a honing rod for honing, reaming and polishing small holes with high hardness, high roughness and high precision requirements.

Background

The existing medical instruments, minimally invasive catheters, steam friction matching, seam matching, dies, ceramics, stones, neodymium iron boron and other types of workpiece holes have the difficulty of finish machining, such as high hardness, small diameter, high requirement on roughness, small end face jump of hole size and high requirement on precision. The honing rod in the prior art has the advantages that the size of the drilling end is large, the precision is not high, and the honing rod cannot be used for forming a small drilling hole in the using process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a honing rod which can be used for forming a small hole and has high dimensional accuracy.

According to the embodiment of the utility model, the honing stick comprises: the drilling tool comprises a working part and a tool shank part which are coaxially arranged, one end of the working part is connected with the tool shank part, the other end of the working part is a working end for drilling, the end face of the working end is a smooth plane, and the diameter D of the end face is less than or equal to 4 mm.

According to some embodiments of the utility model, the honing stick further comprises: the guide sleeve is sleeved on the outer side of the working part, and an abrasive particle electroplated layer is formed on the outer surface of the guide sleeve.

According to some embodiments of the utility model, the surface roughness of the abrasive grain electroplated layer is not less than ra0.8 μm.

According to some embodiments of the utility model, an outer diameter of an end of the guide sleeve adjacent to the working end gradually increases in a direction from the working portion toward the shank portion to form a first guide surface.

According to some embodiments of the utility model, the first guide surface has a guide angle of 0 ° to 20 °.

According to some embodiments of the utility model, an outer diameter of an end of the guide sleeve remote from the working end is gradually reduced in a direction from the working portion toward the shank portion to form a second guide surface.

According to some embodiments of the utility model, the guide sleeve is formed with a chip discharge groove extending therethrough in an axial direction of the guide sleeve for discharging grinding chips.

According to some embodiments of the utility model, the chip groove is formed as a spiral groove extending spirally in a circumferential direction of the guide sleeve.

According to some embodiments of the utility model, the diameter of the working portion decreases gradually in a direction from the shank portion towards the working portion.

According to some embodiments of the utility model, the working portion is formed as a trapezoidal cone and the taper of the working portion is 1: 50.

according to the honing rod provided by the embodiment of the utility model, the end surface of the working end of the honing rod is formed into a smooth plane, namely, the end surface of the working end of the honing rod does not need to be provided with the positioning hole, so that the end surface of the working end of the honing rod can be designed to be relatively small in size, for example, the diameter of the working end 11 can be as small as 1.4mm, the working end can be further miniaturized, the size precision of the honing rod is improved, holes with smaller and finer sizes can be formed when the honing rod is drilled, the practicability and the application range of the honing rod are improved, and the precise processing of the holes with smaller diameters is realized.

Drawings

Fig. 1 is a schematic structural view of a honing stick according to an embodiment of the present invention;

fig. 2 is a side view of a honing stick according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a working part and a tool shank part of a honing stick according to an embodiment of the present invention.

Reference numerals:

100: honing rod, 1: working section, 11: working end, 12: an end face of the working end; 2: shank portion, 3: guide sleeve, 31: chip groove, 32: first guide surface, 33: second guide surface, 34: abrasive grain plating layer, 35: end of the guide sleeve adjacent to the working end, 36: the end of the guide sleeve far away from the working end.

Detailed Description

Hereinafter, a honing stick 100 according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.

In the related art, the working end of the honing rod is used for drilling holes and the like, and since the end surface of the working end of the honing rod is large, smaller and finer holes cannot be formed during drilling, so that the use range of the honing rod is limited and the precision is not high.

The inventor researches and finds that in the production process of the honing stick, because the size of the honing stick is small, in order to keep the position of the honing stick in the production equipment stable, a positioning hole is usually formed at the smaller end of the honing stick, namely the end surface of the working end, so as to fix the honing stick, and because the positioning hole needs to be formed, the size of the end surface of the honing stick is designed to be relatively large, so that the working end of the honing stick is small in size and low in precision.

The honing rod 100 according to the embodiment of the utility model is used for grinding and drilling, as shown in fig. 1 and 2, the honing rod 100 comprises a working part 1 and a tool shank part 2 which are coaxially arranged, one end of the working part 1 is connected with the tool shank part 2, the other end of the working part 1 is formed into a working end 11 for drilling, an end face 12 of the working end 11 is formed into a smooth plane, and the diameter D of the end face 12 is less than or equal to 4 mm.

Specifically, the honing stick 100 includes a working portion 1 and a handle portion 2, the working portion 1 and the handle portion 2 are both formed into an axial structure and are coaxially disposed, the working portion 1 is used for drilling, the handle portion 2 is used for assisting in fixing the position of the honing stick 100, for example, the honing stick 100 can be mounted to an external member through the handle portion 2, the external member includes, but is not limited to, a drilling machine, a honing machine, a multi-head honing, and the like. One end of the working part 1 is fixedly connected with the cutter handle part 2, the other opposite end of the working part 1 is a working end 11 for drilling, and the size of one end of the working part 1 connected with the cutter handle part 2 is larger than that of the working end 11, so that the working part 1 is fixedly connected with the cutter handle part 2, and the working end 11 of the working part 1 can be designed to be smaller so as to form a smaller hole.

As shown in fig. 2, the end surface 12 of the working end 11 is formed to be a plane, that is, the end surface 12 of the working end 11 is smooth and does not form a hole or a groove, etc., so that the honing stick 100 according to the embodiment of the present invention can design the size of the end surface 12 of the working end 11 of the honing stick 100 to be relatively small, for example, the diameter of the working end 11 can be as small as 1.4mm, by forming the end surface 12 of the working end 11 of the honing stick 100 to be a smooth plane, i.e., by not forming a positioning hole on the end surface 12 of the working end 11 of the honing stick 100, the working end 11 can be further miniaturized to improve the size precision of the honing stick 100, and the honing stick 100 can form a hole with a smaller size and a finer size when drilling is performed, to improve the practicality and the use range of the honing stick 100, and to realize the precision machining of the hole with a smaller diameter.

As shown in fig. 1 and 2, the honing stick 100 may further include a guide sleeve 3, the guide sleeve 3 is sleeved outside the working portion 1 and may be used for grinding during drilling, for example, grinding an inner surface of a formed hole to reduce roughness of the hole formed after the honing stick 100 is drilled, and improve strength of the inner surface of the formed hole, and the abrasive grain plating layer 34 is formed on the surface of the guide sleeve 3, so that hardness and strength of the outer surface of the guide sleeve 3 may be enhanced, and the abrasive grains of the abrasive grain plating layer 34 have good wear resistance and are more durable, so that the service life of the guide sleeve 3 may be prolonged, and the cost may be reduced, and the abrasive grains of the abrasive grain plating layer 34 may be sharpened, so that the drilling processing speed may be fast, and the working efficiency may be improved. Specifically, the guide sleeve 3 may be formed in a sleeve shape and sleeved outside the working part 1, a hole formed by drilling through the working end 11 may be ground through the guide sleeve 3, and the guide sleeve 3 is formed as a separate component, which may also simplify the production process of the honing stick 100.

In some specific examples of the present invention, the surface roughness of the abrasive grain electroplated layer 34 is not less than ra0.8 μm, so that the roughness of the guide sleeve 3 is high, the surface roughness of the processed hole is good, and the verticality of the processed hole can be improved; optionally, the abrasive grain granularity of the abrasive grain electroplated layer 34 can adopt 150# -1200 #, the purchase is convenient, the specification is complete, the selection range is wide, the embedding rate of the abrasive grains of the abrasive grain electroplated layer 34 can be 75% -85%, so that the abrasive grain electroplated layer 34 is firmer and more durable, the self roughness of the guide sleeve 3 can be improved, and the surface roughness of the inner hole machined by the abrasive grains is good.

For the assembly mode of the guide sleeve 3, optionally, the guide sleeve 3 can be in interference fit with the working part 1, so that the guide sleeve 3 can be installed outside the working part 1 through the action of external force to be fixedly connected with the working part 1, the guide sleeve 3 can also be tightly contacted with the working part 1, and the influence on grinding and drilling effects due to the clearance between the guide sleeve 3 and the working part 1 is avoided. Further, the guide sleeve 3 can move axially along the working portion 1 when being pressed to a certain degree, for example, in the working process of the honing stick 100, the guide sleeve 3 can be pressed down by the forced movement of the working portion 1, so that the guide sleeve 3 moves towards the tool shank portion 2, and the outer diameter of the guide sleeve 3 can be expanded to achieve the effect of fine adjustment of the size.

In some embodiments of the present invention, an outer diameter of an end of the guide sleeve 3 adjacent to the working end 11 is gradually increased in a direction from the working portion 1 toward the tool shank portion 2 to form a first guide surface 32, and specifically, the guide sleeve 3 is sleeved on the working portion 1, a radial dimension of an end 35 (i.e., a left end as viewed in fig. 1) of the guide sleeve 3 adjacent to the working end 11 is gradually increased in a direction from the working portion 1 toward the tool shank portion 2 (i.e., a direction from left to right as viewed in fig. 1), so that the first guide surface 32 having a guiding function in an axial direction is formed on an outer surface of the end 35 of the guide sleeve 3 adjacent to the working end 11, and the guide sleeve 3 can enter into the hole along the first guide surface 32, thereby facilitating the introduction of the honing stick 100 into the inner hole, improving convenience and accuracy in the processing of the hole, and also reducing a runout value of the honing stick 100 into the inner hole, and improving stability.

Optionally, the guide angle of the first guide surface 32 is 0 ° to 20 °, for example, the guide angle of the first guide surface 32 may be 15 °, so that not only can the product edge be prevented from being damaged during feeding, and the result that the product cannot be repaired is avoided, but also smooth feeding can be ensured. It should be understood that the guide angle refers to an angle between any straight line on the first guide surface 32 and a central axis of the horizontal plane, for example, one end 35 of the guide sleeve 3 adjacent to the working end 11 may be formed in a shape of a circular truncated cone, the first guide surface 32 is formed as a side surface of the circular truncated cone, and an angle between a generatrix of the circular truncated cone and the rotation axis is the guide angle of the first guide surface 32.

In some embodiments of the present invention, an outer diameter of an end 36 of the guide sleeve 3 away from the working end 11 (i.e., a right end of the guide sleeve 3 shown in fig. 1) is gradually reduced in a direction from the working part 1 toward the tool shank 2 to form the second guide surface 33, that is, a radial dimension of the right end of the guide sleeve 3 is gradually reduced in a direction from the working part 1 toward the tool shank 2 to form the second guide surface 33 having a radial dimension gradually reduced from left to right on an outer surface of the guide sleeve 3, so that the guide sleeve 3 can slide out of the inner hole along the second guide surface 33 to facilitate the guide sleeve 3 to exit from the inner hole; optionally, the guide angle of the second guide surface 33 may be 0 ° to 20 °, for example, the guide angle of the second guide surface 33 may be 13 °, so as to prevent the edge of the product from being damaged when the cutter is withdrawn, avoid the result that the product cannot be repaired, and make the cutter withdrawal smoother.

In some embodiments of the present invention, the guide sleeve 3 is formed with a chip discharge groove 31 extending through the guide sleeve 3 in the axial direction thereof for discharging grinding chips, specifically, the chip discharge groove 31 is formed on the side wall of the guide sleeve 3 and extends along the axial direction of the guide sleeve 3, and extends through the guide sleeve 3 in the axial direction of the guide sleeve 3, when the honing stick 100 is in operation, the chip discharge groove 31 can be used for passing through cooling liquid, the cooling liquid can flow along the chip discharge groove 31 and carry away chips generated by drilling and grinding, and the tool can be prevented from being excessively thermally expanded during processing. Optionally, the chip discharge groove 31 may be formed as a spiral groove extending along the circumferential direction of the guide sleeve 3, that is, the chip discharge groove 31 surrounds the circumferential direction of the guide sleeve 3 by at least one circle, so that chips at various positions on the outer surface of the guide sleeve 3 can be taken away by the cooling liquid, and the cooling effect of the cooling liquid is more uniform. Further, the chip discharge groove 31 penetrates through the guide sleeve 3 in the thickness direction of the guide sleeve 3, so that the guide sleeve 3 can be expanded and axially moved along the working part 1 when being subjected to extrusion force to achieve the fine adjustment effect of the outer diameter size, and the chip discharge groove 31 has a certain depth and is beneficial to discharge of chips generated by grinding.

In some embodiments of the present invention, in the direction from the handle 2 to the working part 1 (i.e. in the direction from right to left as shown in fig. 1), the diameter of the working part 1 is gradually reduced, the diameter of the working end 11 is smaller than the diameter of the end of the working part 1 connected to the handle 2, when drilling is performed, firstly, drilling is performed through the working end 11, the diameter of the working part 1 is gradually reduced, which is also beneficial to drilling the honing rod 100, and the guide sleeve 3 is sleeved outside the working part 1, thus, the guide sleeve 3 is conveniently installed on the working part 1 from the working end 11, and when the guide sleeve 3 is ground, the guide sleeve 3 can be blocked from moving due to the smaller diameter of the other end of the working part 1, further, when the guide sleeve 3 is not tightly assembled with the working part 1, the guide sleeve 3 can move and adjust towards the other end opposite to the working end 11, so as to achieve the fine adjustment effect of the outer diameter of the honing rod 100, the fixing strength of the guide bush 3 and the working part 1 can be enhanced. In some specific examples, the working part 1 may be formed as a trapezoidal cone and the taper of the working part 1 is less than or equal to 1:50, that is, the ratio between the diameter of the end face 12 of the working end 11 of the trapezoidal cone and the axial length of the working part 1 is less than or equal to 1:50, so as to ensure the drilling effect of the working part 1 and also facilitate the assembly and adjustment of the guide sleeve 3 and the working part 1.

In some embodiments of the present invention, the maximum diameter of the guide sleeve 3 is larger than the maximum diameter of the tool shank 2, so that the tool shank 2 can extend into the ground hole of the guide sleeve 3, thereby realizing the deep hole processing.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A honing stick, comprising: the drilling tool comprises a working part and a tool shank part which are coaxially arranged, one end of the working part is connected with the tool shank part, the other end of the working part is a working end for drilling, the end face of the working end is a smooth plane, and the diameter D of the end face is less than or equal to 4 mm.

2. The honing stick of claim 1, further comprising: the guide sleeve is sleeved on the outer side of the working part, and an abrasive particle electroplated layer is formed on the outer surface of the guide sleeve.

3. The honing stick of claim 2 wherein said grit electroplated coating has a surface roughness of no less than ra0.8 μm.

4. The honing stick of claim 2, wherein an outer diameter of an end of the guide sleeve adjacent to the working end gradually increases in a direction from the working portion toward the shank portion to form a first guide surface.

5. The honing stick of claim 4, wherein the first guide surface has a guide angle of 0 ° to 20 °.

6. The honing stick of claim 2, wherein an outer diameter of an end of the guide sleeve distal from the working end is gradually reduced in a direction from the working portion toward the shank portion to form a second guide surface.

7. The honing stick of claim 2, wherein the guide sleeve is formed with chip grooves extending therethrough in an axial direction of the guide sleeve for discharging grinding chips.

8. The honing stick of claim 7, wherein said chip discharge grooves are formed as spiral grooves spirally extending along a circumferential direction of said guide bush.

9. The honing stick of claim 1, wherein the working portion has a diameter that gradually decreases in a direction from the handle portion toward the working portion.

10. The honing stick of claim 9, wherein said working portion is formed as a trapezoidal cone and the taper of said working portion is 1: 50.