CN111015513B - Hole grinding tool for head of rock drill - Google Patents

Hole grinding tool for head of rock drill Download PDF

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Publication number
CN111015513B
CN111015513B CN201911382207.9A CN201911382207A CN111015513B CN 111015513 B CN111015513 B CN 111015513B CN 201911382207 A CN201911382207 A CN 201911382207A CN 111015513 B CN111015513 B CN 111015513B
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CN
China
Prior art keywords
sleeve
hole
inner hole
elastic taper
rock drill
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Application number
CN201911382207.9A
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Chinese (zh)
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CN111015513A (en
Inventor
任长春
张颖利
孙妍
丁友生
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Nanjing College of Information Technology
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Nanjing College of Information Technology
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Priority to CN201911382207.9A priority Critical patent/CN111015513B/en
Publication of CN111015513A publication Critical patent/CN111015513A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies
    • B24B41/061Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • B24B41/062Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/48Single-purpose machines or devices for grinding walls of very fine holes, e.g. in drawing-dies

Abstract

The invention discloses a hole grinding tool for a rock drill head, which comprises a connecting disc, a clamp body, a nut, a clamping plate, an elastic taper sleeve, a positioning sleeve and a flexible bushing, wherein one end of the clamp body is fixed with the connecting disc, the positioning sleeve is installed on the connecting disc and is coaxial, the positioning sleeve is positioned in the clamp body, the elastic taper sleeve is inserted from the other end of the clamp body, the flexible bushing is inserted into the elastic taper sleeve, the head to be processed is installed in the flexible bushing, the nut is connected with the clamping plate, the clamping plate is clamped on the elastic taper sleeve, and a nut thread pair is connected to the port at the other end of the clamp body. The hole grinding tool for the rock drill head has the advantages that the flexible bushing is wrapped outside the middle cylindrical surface of the rock drill head, so that the irregular rock drill head is convenient to position and mount; the flexible bushing and the part to be processed are pressed by the elastic taper sleeve with the centering function, so that the centering precision is high, and the clamping is reliable; the machine head hole grinding tool clamp is good in rigidity, high in precision and simple in structure.

Description

Hole grinding tool for head of rock drill
Technical Field
The invention relates to a hole grinding tool for a rock drill head, and belongs to the technical field of technical equipment for machining.
Background
The yT23 rock drill is a high-efficiency air-leg rock drill, mainly used for rock drilling operation in mining roadway tunneling, is also an important tool in railway, water conservancy construction and national defense stone engineering, can perform wet rock drilling on medium-hard and hard rocks, and can drill horizontal and inclined blast holes.
The machine head related to the design is one of the main parts of the yT23 rock drilling machine. The part is roughly cylindrical, and the blank is mostly a forging or a precision casting. In the grinding process of the inner hole of the machine head, due to the irregular shape of parts, a fork-shaped drill clamp supporting frame 92 is arranged at the left end and protrudes out of a cylindrical surface 91, two lug plate 93 protrusions and another cylindrical protrusion 94 which are provided with pull rod bolt holes are arranged at the right end, so that the workpiece is difficult to clamp, common three-jaw tools are inconvenient to clamp, and the clamping precision of the two-jaw tool in the conventional design is not too high. In order to meet the machining requirements and guarantee machining precision, a special tool for drilling a rock drill head is designed.
Disclosure of Invention
The invention aims to provide a hole grinding tool for a rock drill head, which wraps a middle cylindrical surface of the rock drill head by using a flexible bushing, so that an irregular rock drill head is convenient to position and mount.
The specific technical scheme is as follows: a hole grinding tool for a rock drill head comprises a connecting disc, a clamp body, a nut, a clamping plate, an elastic taper sleeve, a positioning sleeve and a flexible bushing,
one end of the fixture body is fixed with the connecting disc, the positioning sleeve is arranged on the connecting disc and is coaxial, the positioning sleeve is positioned in the fixture body, the elastic taper sleeve is inserted from the other end of the fixture body, the flexible bushing is inserted into the elastic taper sleeve, a machine head to be processed is arranged in the flexible bushing, the nut is connected with the clamping plate, the clamping plate is clamped on the elastic taper sleeve, and the nut thread pair is connected with the port at the other end of the fixture body;
the flexible bushing is integrally a sleeve-shaped part and comprises an annular sleeve body, the annular sleeve body is axially divided into two half sleeves, a plurality of third long grooves are axially formed in the sleeve bodies of the two half sleeves, two ends of each third long groove penetrate through two ends of the sleeve body of each half sleeve, and the half sleeves are divided into a plurality of independent long strip-shaped fan-shaped press blocks by the third long grooves; every two adjacent sector-shaped pressing blocks are connected through a connecting head to form a half sleeve; the connecting head is provided with bulges which are respectively arranged on the end surfaces of the two ends of the half sleeve and extend outwards along the axial direction, and the bulges on the end surfaces of the two ends of the half sleeve are alternately arranged;
the machine head to be processed is arranged in an inner hole of the flexible bushing, and a notch for avoiding the cylindrical protrusion on the machine head is arranged on the inner hole wall of the flexible bushing.
According to the technical scheme, the flexible bushing can be radially contracted or expanded under the action of external force due to the existence of the third long groove and the fourth long groove.
Preferably, the coupling disc is a disc-shaped flange provided with a central hole, the right end face of the coupling disc is provided with a first spigot coaxial with the central hole, and the first spigot is matched with an inner hole at the left end of the clamp body, so that the coaxiality of the clamp body 20 and the coupling disc 10 is ensured.
Preferably, the positioning sleeve is a revolving body part provided with an inner hole, and the positioning sleeve is connected with the connecting disc through an annular flange arranged on the outer surface of the left end; and a second spigot arranged at the right end port of the positioning sleeve is matched with an inner hole at the left end port of the machine head.
Preferably, the clamp body is a rotary part provided with an inner hole, the inner hole at the left end of the clamp body is a cylindrical inner hole, the inner hole at the right end of the clamp body is a conical hole, and the large opening of the conical hole faces the right; the right end conical hole of the fixture body is matched with the outer conical surface of the elastic taper sleeve; and an external thread is arranged on the outer surface of the right end port of the clamp body.
Preferably, the elastic taper sleeve is a revolving body part provided with an inner hole, and the inner hole of the elastic taper sleeve is a cylindrical inner hole; a plurality of first long grooves and second long grooves are axially formed in the elastic taper sleeve, the first long grooves are formed from the left end to the right end of the elastic taper sleeve, the second long grooves are formed from the right end to the left end of the elastic taper sleeve, and the first long grooves and the second long grooves are alternately arranged; the outer surface of the elastic taper sleeve is a conical surface, and the small end of the conical surface is positioned at the left end of the elastic taper sleeve; a section of annular cylinder is extended from the right end port of the elastic taper sleeve, and the diameter of an inner hole of the annular cylinder is equal to that of an inner hole of the elastic taper sleeve; the outer surface of the annular cylinder is provided with an annular clamping groove for clamping the clamping plate.
Preferably, the nut is in threaded connection with the clamp body, and the right end face of the nut is fixed with the clamping plate through a screw.
Preferably, the outer surface of the right end of the nut is a polygonal surface. The polygonal surface is used for being clamped by a spanner.
Preferably, the clamping plate is formed by folding two semicircular thin plates.
Preferably, the projections are semi-cylindrical.
Preferably, one end of each third long groove is communicated with the coupling head.
The invention has the beneficial effects that:
1. the hole grinding tool for the rock drill head is wrapped outside a middle cylindrical surface of the rock drill head by the flexible bushing, so that the irregular rock drill head is convenient to position and install.
2. The hole grinding tool for the rock drill head compresses the flexible bushing and the part to be processed by using the elastic taper sleeve with the centering function, so that the centering precision is high, and the clamping is reliable.
3. This rock drill aircraft nose grinds hole frock, aircraft nose grinds hole frock clamp rigidity is good, and the precision is high, simple structure.
Drawings
Fig. 1 is a general view of a rock drill head hole grinding tool (with the head installed).
Fig. 2 is a cut-away view of a rock drill head hole grinding tool.
FIG. 3 is an assembled cutaway view of the clamp body, nut, snap-gauge and resilient cone.
FIG. 4 is a detail view of the flexible liner.
Fig. 5 is a detail view of a prior art handpiece.
Detailed Description
The technical solution of the present invention is described in detail below, but the scope of the present invention is not limited to the embodiments.
In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with fig. 1 to 5 and the detailed description.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The yT23 rock drill is a high-efficiency air-leg rock drill, mainly used for rock drilling operation in mining roadway tunneling, is also an important tool in railway, water conservancy construction and national defense stone engineering, can perform wet rock drilling on medium-hard and hard rocks, and can drill horizontal and inclined blast holes.
As shown in fig. 5, the present design relates to a head 90 which is one of the main parts of the yT23 rock drill. The part is roughly cylindrical, and comprises a cylindrical surface 91, a drill clamp support frame 92, an ear plate 93 provided with a pull rod bolt hole, a cylindrical bulge 94 and an inner hole 95, wherein a blank is mostly a forged piece or a precision casting piece. In the grinding process of the inner hole 95 of the machine head, due to the irregular shape of parts, the fork-shaped drill clamp support frame 92 at the left end protrudes out of the cylindrical surface 91, and the two lug plate 93 bulges and the other cylindrical bulge 94 which are provided with pull rod bolt holes are arranged at the right end, so that the workpiece is difficult to clamp, common three-jaw tools are inconvenient to clamp, and the clamping precision of the two-jaw tool in the conventional design is not too high. In order to meet the machining requirements and guarantee machining precision, a special tool for drilling a rock drill head is designed.
As shown in fig. 1 and 2, the hole grinding tool for the machine head of the rock drilling machine in the embodiment includes a coupling plate 10, a fixture body 20, a nut 30, a clamping plate 40, an elastic taper sleeve 50, a positioning sleeve 60 and a flexible bushing 70, wherein one end of the fixture body 20 is fixed to the coupling plate 10, the positioning sleeve 60 is coaxially mounted on the coupling plate 10, the positioning sleeve 60 is located in the fixture body 20, the elastic taper sleeve 50 is inserted from the other end of the fixture body 20, the flexible bushing 70 is inserted into the elastic taper sleeve 50, the machine head 90 to be processed is installed in the flexible bushing 70, the nut 30 is connected with the clamping plate 40, the clamping plate 40 is clamped on the elastic taper sleeve 50, and the nut 30 is in threaded connection with a port at the other end of the fixture body 20.
As shown in fig. 2, the coupling plate 10 is a disc-shaped flange with a central hole, a first spigot coaxial with the central hole is arranged on the right end face of the coupling plate 10, and the first spigot is matched with an inner hole at the left end of the clamp body 20 to ensure the coaxiality of the clamp body 20 and the coupling plate 10.
As shown in fig. 2, the positioning sleeve 60 is a revolving body component provided with an inner hole, the positioning sleeve 60 is matched and positioned with the central hole of the coupling disk 10 through an annular positioning cylinder convexly arranged on the end surface of the left end, and the positioning sleeve 60 is connected with the coupling disk 10 through an annular flange arranged on the outer surface of the left end; the right end port of the positioning sleeve 60 is provided with a second spigot which is matched with an inner hole at the left end port of the machine head 90, and the diameter of the inner hole of the positioning sleeve 60 is slightly larger than that of the inner hole at the left end of the machine head 90.
As shown in fig. 2 and 3, the fixture body 20 is a revolving body part provided with an inner hole, the inner hole at the left end of the fixture body 20 is a cylindrical inner hole, the inner hole at the right end of the fixture body 20 is a tapered hole, and the large opening of the tapered hole faces to the right; the right end taper hole of the fixture body 20 is matched with the outer taper surface of the elastic taper sleeve 50; an external thread is provided on the outer surface of the right end port of the clamp body 20. The orifice of the cylindrical inner hole at the left end of the clamp body 20 is matched with a spigot arranged on the right end face of the connecting disc 10, and the left end of the clamp body 20 is provided with a flange which is coaxially and fixedly connected with the connecting disc 10 through a screw.
As shown in fig. 2 and 3, the elastic taper sleeve 50 is a revolving body part provided with an inner hole, and the inner hole of the elastic taper sleeve 50 is a cylindrical inner hole; a plurality of first long grooves and second long grooves are axially formed in the elastic taper sleeve 50, the first long grooves are formed from the left end to the right end of the elastic taper sleeve 50, the second long grooves are formed from the right end to the left end of the elastic taper sleeve 50, and the first long grooves and the second long grooves are alternately arranged; the outer surface of the elastic taper sleeve 50 is a conical surface, and the small end of the conical surface is positioned at the left end of the elastic taper sleeve 50; a section of annular cylinder extends from the right end port of the elastic taper sleeve 50, and the diameter of an inner hole of the annular cylinder is equal to that of the inner hole of the elastic taper sleeve 50; and the outer surface of the annular cylindrical barrel is provided with an annular clamping groove for clamping the clamping plate 40.
As shown in fig. 3, the nut 30 is screwed to the clamp body 20, and the right end surface of the nut 30 is fixed to the chuck plate 40 by a screw. The outer surface of the right end of the nut 30 is a polygonal surface for being clamped by a wrench. The clamping plate 40 is clamped in an annular clamping groove at the outer side of the right end of the elastic taper sleeve 50, and the clamping plate 40 is formed by folding two semicircular thin plates.
A spanner is used for clamping the polygonal surface to rotate the nut 30 clockwise, the nut 30 pushes the elastic taper sleeve 50 to move axially towards the left through the clamping plate 40, and the taper hole at the right end of the clamp body 20 pushes the elastic taper sleeve 50 to contract radially. The cylindrical inner hole of the elastic taper sleeve 50 is reduced, the flexible bushing 70 is extruded, the flexible bushing is extruded to radially contract, and the cylindrical surface of the middle section of the machine head 90 is compressed, so that the purpose of positioning and clamping the machine head 90 is achieved.
As shown in fig. 4, the flexible bushing 70 is a sleeve-shaped component as a whole, the flexible bushing 70 includes an annular sleeve body, the annular sleeve body is axially divided into two half sleeves, a plurality of third long grooves 71 are axially formed in the sleeve bodies of the two half sleeves, both ends of each third long groove 71 penetrate both ends of the sleeve body of the half sleeve, and the half sleeves are divided into a plurality of independent long strip-shaped sector-shaped press blocks 72 by the third long grooves 71; every two adjacent sector-shaped pressing blocks 72 are connected through a connecting head 73 to form a half sleeve; the coupling heads 73 are provided with protrusions respectively protruding outwards along the axial direction on the end faces of the two ends of the half sleeve, and the protrusions on the end faces of the two ends of the half sleeve are alternately arranged. The bulge is in a semi-cylindrical shape. One end of each third long groove 71 is respectively communicated with the coupling heads 73, and the connecting surfaces of the semi-cylindrical coupling heads 73 are simultaneously connected with the end surfaces of two adjacent fan-shaped pressing blocks 72.
The head 90 to be machined is inserted into the inner bore of the flexible bushing 70, and a recess 74 for avoiding the cylindrical projection 94 of the head 90 is provided in the inner bore wall of the flexible bushing 70. The flexible bushing 70 may radially contract or expand under an external force due to the presence of the third elongated slot.
The working process of the drilling tool for the head of the rock drill in the embodiment is as follows:
the flexible bushing 70 is wrapped outside the middle cylindrical surface of the machine head 90, the drill clamp support frame 92 of the machine head 90 is placed towards the left direction, and the machine head wrapped with the flexible bushing is integrally inserted into the elastic taper sleeve 50 of the hole grinding tool, so that an inner hole of a port at the left end of the machine head 90 is matched with a second spigot at the right end of the positioning sleeve 60.
A spanner is used for clamping the polygonal surface to rotate the nut 30 clockwise, the nut 30 pushes the elastic taper sleeve 50 to move axially towards the left through the clamping plate 40, and the taper hole at the right end of the clamp body pushes the elastic taper sleeve 50 to contract radially. The cylindrical inner hole of the elastic taper sleeve 50 is reduced, the flexible bushing is extruded to radially contract, and the cylindrical surface of the middle section of the machine head is compressed, so that the purpose of positioning and clamping the machine head is achieved.
After the inner hole is ground, the nut 30 is rotated reversely, the nut 30 pushes the elastic taper sleeve 50 to move towards the right axial direction through the clamping plate 40, the elastic taper sleeve 50 elastically returns in the radial direction, the cylindrical inner hole at the right end of the elastic taper sleeve 50 is enlarged, the flexible bushing 70 is loosened, and the whole machine head wrapping the flexible bushing is pulled out of the clamp rightwards.
And replacing the other machine head and repeating the actions.
Where not otherwise indicated herein or enabled by the prior art, it will be appreciated that modifications and variations may be resorted to without departing from the scope of the invention as set forth in the appended claims.

Claims (9)

1. The utility model provides a rock drill aircraft nose grinds hole frock which characterized in that: the clamping fixture comprises a connecting disc (10), a fixture body (20), a nut (30), a clamping plate (40), an elastic taper sleeve (50), a positioning sleeve (60) and a flexible bushing (70), wherein one end of the fixture body (20) is fixed with the connecting disc (10), the positioning sleeve (60) is installed on the connecting disc (10) and is coaxial, the positioning sleeve (60) is located in the fixture body (20), the elastic taper sleeve (50) is inserted from the other end of the fixture body (20), the flexible bushing (70) is inserted into the elastic taper sleeve (50), a machine head (90) to be processed is installed in the flexible bushing (70), the nut (30) is connected with the clamping plate (40), the clamping plate (40) is clamped on the elastic taper sleeve (50), and the nut (30) is in threaded pair connection with the port at the other end of the fixture body (20);
the flexible bushing (70) is a sleeve-shaped part as a whole, the flexible bushing (70) comprises an annular sleeve body, the annular sleeve body is axially divided into two half sleeves, a plurality of third long grooves (71) are axially formed in sleeve bodies of the two half sleeves, two ends of each third long groove (71) penetrate through two ends of each sleeve body of each half sleeve, and the half sleeves are divided into a plurality of independent long strip-shaped fan-shaped press blocks (72) by the third long grooves (71); every two adjacent sector-shaped pressing blocks (72) are connected through a connecting head (73) to form a half sleeve; the connecting head (73) is provided with bulges which are respectively arranged on the end surfaces of the two ends of the half sleeve and extend outwards along the axial direction, and the bulges on the end surfaces of the two ends of the half sleeve are alternately arranged;
a machine head (90) to be processed is arranged in an inner hole of the flexible bushing (70), and a notch (74) for avoiding a cylindrical protrusion (94) on the machine head (90) is arranged on the inner hole wall of the flexible bushing (70);
the elastic taper sleeve (50) is a revolving body part provided with an inner hole, and the inner hole of the elastic taper sleeve (50) is a cylindrical inner hole; a plurality of first long grooves and second long grooves are axially formed in the elastic taper sleeve (50), the first long grooves are formed from the left end to the right end of the elastic taper sleeve (50), the second long grooves are formed from the right end to the left end of the elastic taper sleeve (50), and the first long grooves and the second long grooves are alternately arranged; the outer surface of the elastic taper sleeve (50) is a conical surface, and the small end of the conical surface is positioned at the left end of the elastic taper sleeve (50); a section of annular cylinder is extended from the right end port of the elastic taper sleeve (50), and the diameter of an inner hole of the annular cylinder is equal to that of the inner hole of the elastic taper sleeve (50); the outer surface of the annular cylinder is provided with an annular clamping groove for clamping the clamping plate (40).
2. The rock drill head hole grinding tool is characterized in that the connecting disc (10) is a disc-shaped flange provided with a central hole, a first spigot coaxial with the central hole is arranged on the right end face of the connecting disc (10), and the first spigot is matched with an inner hole in the left end of the clamp body (20).
3. The rock drill head hole grinding tool according to claim 1, characterized in that the positioning sleeve (60) is a revolving body part provided with an inner hole, and the positioning sleeve (60) is connected with the connecting disc (10) through an annular flange arranged on the outer surface of the left end; a second spigot arranged at the right end port of the positioning sleeve (60) is matched with an inner hole at the left end port of the machine head (90).
4. The rock drill head hole grinding tool is characterized in that the clamp body (20) is a rotary part provided with an inner hole, the inner hole at the left end of the clamp body (20) is a cylindrical inner hole, the inner hole at the right end of the clamp body (20) is a conical hole, and the large opening of the conical hole faces the right; the right end taper hole of the fixture body (20) is matched with the outer taper surface of the elastic taper sleeve (50); an external thread is arranged on the outer surface of the right end port of the clamp body (20).
5. The rock drill head hole grinding tool according to claim 1, characterized in that the nut (30) is in threaded connection with the clamp body (20), and the right end face of the nut (30) and the clamping plate (40) are fixed through screws.
6. The rock drill head hole grinding tool according to claim 5, characterized in that the outer surface of the right end of the nut (30) is a polygonal surface.
7. The rock drill head hole grinding tool according to claim 1, characterized in that the clamping plate (40) is formed by folding two semicircular thin plates.
8. A rock drill head hole grinding tool according to claim 1, characterized in that the projection is semi-cylindrical.
9. The rock drill head hole grinding tool according to claim 1, characterized in that one end of each of the third long grooves (71) is communicated with the coupling head (73).
CN201911382207.9A 2019-12-28 2019-12-28 Hole grinding tool for head of rock drill Active CN111015513B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911382207.9A CN111015513B (en) 2019-12-28 2019-12-28 Hole grinding tool for head of rock drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911382207.9A CN111015513B (en) 2019-12-28 2019-12-28 Hole grinding tool for head of rock drill

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CN111015513A CN111015513A (en) 2020-04-17
CN111015513B true CN111015513B (en) 2022-02-15

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SU1296315A1 (en) * 1985-07-09 1987-03-15 Предприятие П/Я В-2481 Chuck for shank tool
CN2262237Y (en) * 1996-01-08 1997-09-10 常州托利多电子衡器有限公司 Box body connector for lift hook scale
CN1575151A (en) * 2001-11-05 2005-02-02 普雷西梅德公司 Torque-transmitting coupling and surgical device
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