TWI762161B - Drilling machine chamfering tool - Google Patents

Abstract

A chamfering tool for a drilling machine, comprising a body, a blade, and a support guide block, the body has a cutting groove and a guide block groove, the blade is detachably installed in the cutting groove, and the support guide block is detachable is installed in the guide block groove, the guide block groove has an insertion slot, the insertion slot includes two guide groove recesses and a guide groove protrusion formed between the two guide groove recesses, and the support guide block has With the inserting end matching the inserting groove shape, the drilling machine chamfering tool of the present invention can replace the insert, and the support guide block is used to support the periphery of the workpiece hole to avoid the vibration of the body and improve the processing quality.

Description

Drilling machine chamfering tool

The present invention relates to a chamfering tool, in particular to a drilling machine chamfering tool with a support guide block.

Please refer to FIG. 9 , the existing drilling machine chamfering tool 90 has a one-piece structure, which mainly includes a handle 91 and a tapered cutter head 92 formed at one end of the handle 91 . The tapered cutter head 92 has an edge portion 922 ; When the existing chamfering tool 90 rotates, the edge portion 922 of the tapered cutter head 92 is used to cut the periphery of the hole of the workpiece to form a chamfer.

However, the existing chamfering tool 90 has the following disadvantages:

1. Due to the integrated structure of the existing chamfering tool 90, after a period of use, the blade 922 will be worn and passivated. After the blade 922 is passivated, it is necessary to grind the blade 922 to restore the blade 922. It can be used continuously after being sharp. Secondly, after long-term use, if the blade portion 922 is worn and cracked and cannot be used continuously, the entire existing chamfering tool 90 needs to be replaced.

2. When using the existing chamfering tool 90 for cutting, only the edge portion 922 of the tapered cutter head 92 is in contact with the workpiece, so when the cutting resistance is too large, it is easy to cause the existing chamfering tool 90 to produce a swaying situation, The phenomenon of tool vibration results in poor machining lines and affects machining accuracy.

In view of the above deficiencies, the main purpose of the present invention is to provide a chamfering tool for a drilling machine, which can replace the insert and can improve the problem that the tool vibrates during cutting and affects the machining accuracy.

In order to achieve the above-mentioned purpose, the drilling machine chamfering tool of the present invention comprises: a body, the body includes a central axis, a handle portion, and a cutter head, the handle portion extends along the central axis, the cutter head is formed at one end of the handle portion, and the cutter head is away from the cutter One end of the shank has a tapered end, the tapered end has a first tapered surface, and a cutting groove and a guide block groove are recessed on the outer periphery of the tool head; a blade, the blade is detachably installed in the cutting groove of the cutter head, and the blade of the blade protrudes from the first tapered surface of the tapered end; and A support guide block, the support guide block is detachably installed in the guide block groove of the cutter head, wherein, The guide block groove extends from the tapered end of the tool head toward the shank, and an inserting groove is formed at one end of the guide block groove away from the tapered end, and the inserting groove includes two guide groove recesses , a guide groove convex part, and two guide groove side edges, the two guide groove concave parts are recessed in the tool head part toward the shank part, and form a convex toward the tapered end part between the two guide groove concave parts The two guide groove side edges are respectively formed on the side of the two guide groove concave parts away from the other guide groove concave part, and the two guide groove side edges gradually move away from the other guide groove side edge toward the taper shaped end extension; The support guide block includes a support cone surface and an insert end portion, the support cone surface corresponds to the position of the first cone surface of the tapered end portion, and the support cone surface protrudes from the first cone surface, the insert end portion The end of the support guide block is formed at one end of the support guide block adjacent to the handle portion, the shape of the inserting end portion matches the shape of the inserting groove, and the inserting end portion includes two guide block protrusions and a guide block concave portion, and the two inserting side edges, the two guide block protrusions both protrude toward the shank and abut against the two guide groove recesses of the inserting groove respectively, and the guide block recess is formed between the two guide block protrusions, The concave portion of the guide block is recessed on the support guide block toward the tapered end portion, and the concave portion of the guide block abuts against the convex portion of the guide groove of the inserting groove, and the two inserting side edges are respectively formed on the two guide block protrusions The side edge of the two inserting card is gradually away from the other side edge of the other inserting card and extending toward the tapered end, and respectively abuts the two guide groove side edges of the inserting groove. .

Utilizing the above-mentioned technical features, the drilling machine chamfering tool of the present invention has the following efficacy gains:

1. The blade is detachably assembled to the body, so when the blade is worn and dull, the blade can be replaced directly.

2. Since the support tapered surface of the support guide block protrudes from the first tapered surface of the cutter head, when the blade cuts the periphery of the drill hole, the support guide block will abut against the periphery of the drill hole at the same time, avoiding the cutter head. The parts vibrate relatively during chamfering, thereby improving the machining quality.

3. Since the side edges of the two guide grooves of the inserting slot gradually approach the shank, and the inserting slot has a guide groove protrusion, the two guide groove side edges of the inserting groove and the guide groove protrusion can be used. The guide of the upper part makes the support guide block easier to slide to the position, which improves the convenience of assembly.

4. The insertion slot has two concave guide grooves and a raised guide slot, and is generally W-shaped, increasing the number and direction of the bearing surfaces between the insertion slot and the insertion end of the support guide block, and the support The axial impact received by the guide block can be dispersed by the W-shaped inserting slot, which reduces the axial impact on the head of the drilling machine when the chamfering cutting axially presses the chamfering tool of the drilling machine, and avoids the The head vibrates in the axial direction, thereby improving the processing quality.

Please refer to FIGS. 1 to 5 , a preferred embodiment of the chamfering tool for a drilling machine of the present invention includes a body 10 , a blade 20 , and a support guide block 30 .

The body 10 has a central axis 101 , a handle portion 11 and a cutter head 13 , the handle portion 11 extends along the central axis 101 , the cutter head 13 is formed at one end of the handle portion 11 , and the cutter head The outer diameter of the portion 13 is larger than the outer diameter of the handle portion 11. The end of the tool head portion 13 away from the handle portion 11 has a tapered end portion 131, and the outer diameter of the tapered end portion 131 is directed away from the handle portion. The direction of the portion 11 gradually becomes smaller, the tapered end portion 131 has a first tapered surface 132, the tangent of the first tapered surface 132 and the central axis 101 form an acute angle, the angle of the acute angle can be 30 degrees, 45 degrees, 60 degrees, 75 degrees, etc.

As shown in FIG. 3 and FIG. 4 , a cutting groove 14 and a guide block groove 16 are recessed on the outer periphery of the cutter head 13 . The guide block 30 is detachably installed in the guide block groove 16 of the cutter head 13 .

Please refer to FIG. 2 and FIG. 4 , the cutting groove 14 extends from the tapered end portion 131 toward the shank portion 11 , the cutting groove 14 has a radially extending flat surface 141 , and an accommodating recess is recessed on the flat surface 141 . Slot 142, the blade 20 is detachably installed in the accommodating groove 142, the blade 20 can be locked in the accommodating groove 142 by a bolt 25 in a direction perpendicular to the plane 141, and the blade of the blade 20 protrudes For the first tapered surface 132 of the tapered end portion 131, preferably, the cutting edge of the blade 20 is parallel to the tangent of the first tapered surface 132 to form the acute angle formed by the central axis 101; because the blade 20 It is detachably installed on the body 10, so when the blade 20 is worn out, the blade 20 can be replaced directly. The blade 20 can be a polygonal blade, which can be an ISO standard blade, such as TCEX13T304. The user can easily purchase the replacement blade 20.

Please refer to FIG. 1 , FIG. 3 , FIG. 6 , and FIG. 7 , the guide block groove 16 extends from the tapered end 131 of the tool head 13 toward the handle part 11 , and the guide block groove 16 is away from the taper An inserting slot 165 is formed at one end of the shaped end portion 131. The inserting slot 165 is approximately W-shaped. The inserting slot 165 includes two guide slot concave portions 164, a guide slot convex portion 166, and two guide slot side edges 163. The two guide groove recesses 164 are recessed on the tool head 13 toward the shank portion 11 , and the guide groove protrusion 166 protruding toward the tapered end portion 131 is formed between the two guide groove recesses 164 . The two guide groove side edges 163 are respectively formed on one side of the two guide groove recesses 164 away from the other guide groove recess 164 , and the side of each guide groove side edge 163 gradually away from the other guide groove side edge 163 is toward the tapered shape End 131 extends.

The support guide block 30 can be detachably locked to the guide block groove 16 of the main body 10 by a bolt 40 . The support guide block 30 includes a support cone surface 32 and an engaging end 33 . The support cone surface 32 is opposite to At the position of the first tapered surface 132 of the cutter head 13, and the support tapered surface 32 protrudes from the first tapered surface 132, the inserting end portion 33 is formed at one end of the support guide block 30 adjacent to the tool handle portion 11, The inserting end portion 33 is substantially W-shaped, which matches the shape of the inserting slot 165 and is inserted into the inserting slot 165 . The inserting end portion 33 includes two guide block protrusions 333 , one The guide block concave portion 334 and the two inserting side edges 332, the two guide block convex portions 333 both protrude toward the shank portion 11, and respectively abut against the two guide groove concave portions 164 of the inserting groove 165, the two guide blocks The guide block concave portion 334 is formed between the convex portions 333 . The guide block concave portion 334 is recessed on the support guide block 30 toward the tapered end portion 131 , and the guide block concave portion 334 abuts against the guide groove protrusion of the insertion groove 165 . part 166, the two inserting side edges 332 are respectively formed on the side of the two guide block protruding parts 333 away from the other guide block protruding part 333, the two inserting side edges 332 are gradually away from the direction of the other inserting side edge 332 The tapered end portion 131 extends and abuts against the two guide groove side edges 163 of the inserting groove 165 respectively.

Preferably, the protruding portion 166 of the guide groove of the inserting groove 165 does not extend to the first tapered surface 132, but has an axial distance from the edge of the first tapered surface 132 adjacent to the shank portion 11, The side edges 163 of the two guide grooves extend to the first tapered surface 132 ; the guide block recess 334 of the engaging end 33 of the support guide block 30 does not extend to the support tapered surface 32 , but is adjacent to the support tapered surface 32 There is an axial distance between the edges of the shank portion 11 , and the two side edges 332 of the insert clip extend to the support conical surface 32 .

Referring to FIGS. 6 to 8 , since the support tapered surface 32 of the support guide block 30 protrudes from the first tapered surface 132 of the cutter head 13 , when the blade 20 contacts and cuts the periphery of the drilled hole, the support guide block 30 At the same time, it abuts against the periphery of the drilled hole, so as to avoid the relative vibration of the cutter head 13 during chamfering cutting, avoid the phenomenon of cutter vibration, and thus improve the processing quality.

Preferably, the outer circumference of the support cone surface 32 of the support guide block 30 protrudes from the first cone surface 132 by unequal radial distances, the support cone surface 32 and the first cone surface 132 have different axial centers, and the support cone The surface 32 gradually moves away from the first conical surface 132 from the side adjacent to the blade 20, so that the cross section of the supporting conical surface 32 is a parabola gradually away from the first conical surface 132, so that the supporting conical surface 32 is adjacent to the first conical surface 132. One side of the blade 20 protrudes from the first conical surface 132 at the smallest radial distance, and the side away from the blade 20 protrudes from the first conical surface 132 at the largest radial distance. The support conical surface 32 protrudes from the first cone The difference between the minimum value and the maximum value of the radial distance of the surface 132 is less than 1 mm, and during chamfering cutting, the support cone surface 32 only rests on the workpiece at the position with the maximum radial distance protruding from the first cone surface 132 so that the support cone surface 32 is in point contact with the hole wall of the workpiece, the contact area between the support cone surface 32 and the hole wall of the workpiece is reduced, and the cutting resistance is reduced.

Referring to FIG. 7 , when the support guide block 30 is assembled, when the support guide block 30 slides from the tapered end portion 131 toward the shank portion 11 , the side edges 163 of the two guide grooves of the insertion groove 165 face the The shank portion 11 is gradually approached, and the inserting slot 165 has a guide groove protrusion 166, and the guide groove side edges 163 of the inserting groove 165 and the guide groove protrusion 166 can be used to guide the guide block to avoid supporting the guide block. When the inserting end 33 of 30 enters the inserting slot 165, it slides left and right relatively, so that the support guide block 30 can be easily slid to the position, and the convenience of assembly is improved; An included angle α less than 120 degrees is formed between the tangents of the two guide groove side edges 163 , the included angle α is preferably less than 90 degrees, and the preferred angle is between 45 degrees and 75 degrees. The included angle formed between the tangent lines of the two engaging side edges 332 of the portion 33 is the same as the included angle α between the tangent lines of the two guide groove side edges 163 of the engaging slot 165 .

Please refer to FIG. 7 and FIG. 8 , since the insertion slot 165 has two guide groove recesses 164 and a guide slot protrusion 166 and is generally W-shaped, the insertion slot 165 and the insertion end of the support guide block 30 are added. The number and direction of the bearing surfaces between 33 and 33, when chamfering is performed, the axial impact on the support and guide block 30 can be dispersed by the W-shaped inserting groove 165 to reduce the axial impact of chamfering cutting. When the chamfering tool of the drilling machine is pressed down, the axial impact on the tool head 13 can avoid the axial vibration of the tool head 13, thereby improving the processing quality.

Preferably, each guide groove concave portion 164 of the inserting slot 165 is a circular arc concave surface, the guide groove convex portion 166 of the inserting slot 165 is a circular arc convex surface, and the inserting end portion 33 of the supporting guide block 30 has a circular arc concave surface. Each guide block convex portion 333 is an arc convex surface matching the shape of the corresponding guide groove concave portion 164 , and the guide block concave portion 334 of the inserting end portion 33 is the shape of the guide groove convex portion 166 of the inserting groove 165 . The matching arc concave surface can be used to disperse the stress by using the matching method of the arc concave surface and the convex surface.

Utilizing the above-mentioned technical features, the drilling machine chamfering tool of the present invention has the following advantages:

1. The blade 20 is detachably mounted on the cutting groove 14 of the tool head 13 of the main body 10 , so when the blade 20 is worn, the blade 20 can be replaced.

2. The support guide block 30 can be used to support the periphery of the drilled hole, so as to avoid the relative vibration of the cutter head 13 during chamfering, thereby improving the processing quality.

3. The inserting slot 165 is generally W-shaped, so that the support guide block 30 can be easily assembled and positioned.

4. The inserting groove 165 is approximately W-shaped, which can disperse the axial impact received by the support guide block 30, avoid the axial vibration of the tool head 13 during chamfering, thereby improving the machining quality.

10: Ontology 101: Center shaft 11: Handle part 13: Knife head 131: Tapered end 132: The first cone 14: Cutting groove 141: Plane 142: accommodating slot 16: Guide block slot 163: Side edge of guide groove 164: Guide groove recess 165: Embedded card slot 166: Guide groove protrusion 20: Blades 25: Bolts 30: Support guide block 32: Support cone 33: Embedded card end 332: Embedded card side edge 333: Guide block protrusion 334: Guide block recess 40: Bolts α: included angle 90: Drilling machine chamfering tool 91: Handle 92: Conical cutter head 922: Blade

FIG. 1 is a three-dimensional appearance view of a preferred embodiment of the present invention. FIG. 2 is another three-dimensional appearance view of the preferred embodiment of the present invention. 3 is an exploded perspective view of a preferred embodiment of the present invention. FIG. 4 is another perspective exploded view of the preferred embodiment of the present invention. Figure 5 is a side view of the preferred embodiment of the present invention. FIG. 6 is a cross-sectional view of the preferred embodiment of the present invention taken along the line A-A of FIG. 5 . 7 is a partial enlarged side view of a preferred embodiment of the present invention. FIG. 8 is a schematic diagram of the operation of the preferred embodiment of the present invention. FIG. 9 is a perspective external view of a conventional chamfering tool.

10: Ontology

101: Center shaft

11: Handle part

13: Knife head

131: Tapered end

132: The first cone

163: Side edge of guide groove

164: Guide groove recess

165: Embedded card slot

166: Guide groove protrusion

20: Blades

30: Support guide block

32: Support cone

33: Embedded card end

332: Embedded card side edge

333: Guide block protrusion

334: Guide block recess

40: Bolts

Claims (7)

A chamfering tool for a drilling machine, comprising: a body, the body includes a central axis, a shank portion, and a tool head portion, the tool shank portion extends along the central axis, and the tool head portion is formed on the tool shank portion one end of the cutter head, the end of the cutter head away from the shank has a tapered end, the tapered end has a first tapered surface, and the outer periphery of the cutter head is concavely provided with a cutting groove and a guide block groove; a blade, the blade is detachably installed in the cutting groove of the tool head, and the blade of the blade protrudes from the first conical surface of the tapered end; and a support guide block, the support guide block is detachably installed A guide block groove is provided on the cutter head, wherein the guide block groove extends from the tapered end of the cutter head toward the shank, and an end of the guide block groove away from the tapered end is formed. an inserting slot, the inserting slot includes two guide slot concave parts, a guide slot convex part, and two guide slot side edges, the two guide slot concave parts are both recessed on the tool head part toward the tool handle part, and in the two Between the concave parts of the guide groove is formed the convex part of the guide groove which protrudes towards the conical end part, the side edges of the two guide grooves are respectively formed on the side of the concave part of the two guide grooves away from the concave part of the other guide groove, the sides of the two guide grooves are respectively formed The edge is gradually away from the side edge of the other guide groove and extends toward the tapered end; the support guide block includes a support tapered surface and an engaging end portion, and the support tapered surface corresponds to the first tapered surface of the tapered end portion. position, and the support conical surface protrudes from the first conical surface, the inserting end portion is formed at one end of the support guide block adjacent to the shank portion, and the shape of the inserting end portion matches the shape of the inserting slot, The inserting end portion includes two guide block protrusions, a guide block recess, and two inserting side edges. The two guide block protrusions protrude toward the shank portion and abut against two sides of the inserting groove respectively. A guide groove recess, the guide block recess is formed between the two guide block protrusions, the guide block recess is recessed on the support guide block toward the tapered end, and the guide block recess abuts against the guide of the inserting groove. Slot protrusions, the two inserting side edges are respectively formed on one side of the two guide block protrusions away from the other guide block protrusion, the two inserting side edges are gradually away from the tapered end of the other inserting side edge The parts extend and respectively abut against the side edges of the two guide grooves of the inserting groove. The chamfering tool for a drilling machine as claimed in claim 1, wherein the radial distances at which the support tapered surface of the support guide block protrudes from the first tapered surface of the tool head are not equal. The chamfering tool for a drilling machine according to claim 1 or 2, wherein an included angle of less than 120 degrees is formed between the tangent lines of the two guide groove side edges of the guide block groove of the tool head and the embedded groove of the guide block. The included angle formed between the tangents of the two inserting side edges of the inserting end portion is the same as the included angle between the tangents of the two guide groove side edges of the inserting slot. The chamfering tool for a drilling machine according to claim 1 or 2, wherein: there is an axial distance between the convex portion of the guide groove of the inserting groove of the tool head portion and the edge of the first tapered surface adjacent to the tool shank portion; And there is an axial distance between the concave portion of the guide block at the inserting end of the support guide block and the edge of the support conical surface adjacent to the shank portion. The chamfering tool for a drilling machine according to claim 1 or 2, wherein each guide groove concave portion of the inserting groove is a circular arc concave surface, and the guide groove convex portion of the inserting groove is a circular arc convex surface; and the inserting portion of the supporting guide block Each guide block convex part of the card end is an arc convex surface matching the shape of the corresponding guide groove concave part, and the guide block concave part of the card inserting end part is an arc concave surface matching the shape of the guide groove convex part. The drilling chamfering tool of claim 1 or 2, wherein the cutting flute extends from the tapered end of the tool head toward the shank portion, the cutting flute has a radially extending plane, and is at the plane An accommodating groove is recessed, and the blade is detachably installed in the accommodating groove. The drilling machine chamfering tool of claim 6, wherein the insert is polygonal.

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