CN105855578A - Combined boring rod device convenient to adjust - Google Patents

Abstract

The invention relates to a combined boring rod device convenient to adjust. The combined boring rod device comprises a boring rod, a connecting rod and a floating device, the floating device comprises a conical handle connected with a boring machine spindle, a positioning pin and a semispherical screw, one end of the connecting rod is positioned in a blind hole at the end of the conical handle while the other end of the same is connected with the boring rod, the connecting rod and the conical handle are connected through a radial connecting pin, an internal thread hole is formed in the end of the connecting rod, the positioning pin is positioned in the internal thread hole, the semispherical screw is connected in the internal thread hole in a threaded manner, the head of the semispherical screw is abutted against the bottom of the blind hole, a spherical face protruding at one end of the positioning pin is matched in an arc-shaped groove in the peripheral surface of a connecting pin, a spring sleeves the positioning pin, one end of the spring is abutted against a shaft shoulder of the positioning pin while the other end of the same is abutted against the bottom of the semispherical screw, and a gap distance is formed between the peripheral surface of the connecting rod and the wall of the blind hole. The boring rod and the connecting rod are of a split structure, so that the combined boring rod device is easy to mount and demount, flexible to operate and convenient to maintain, boring accuracy is improved, stability of machining stability is guaranteed, and machining efficiency is improved.

Description

An Easy-to-Adjust Combined Boring Bar Device

technical field

The invention relates to an adjustable combined boring bar device, which belongs to the technical field of mechanical processing.

Background technique

In the prior art, the boring bar is usually an integral boring bar, which is complicated to manufacture and requires high precision. In actual use, it is necessary to replace the boring bar with different diameters according to the diameter of the processed hole; when boring a deep hole, the boring bar The rod requires good rigidity and strength, and a guide device needs to be designed to guide the boring rod. Therefore, when rough boring, semi-fine boring and fine boring workpieces, it is necessary to replace different boring bars and boring bar guides, resulting in high manufacturing costs, complicated installation and low labor efficiency. Ordinary boring bars are fixed to the main shaft of the machine tool, which cannot eliminate the error caused by the center line of the main shaft and the center line of the guide sleeve hole of the fixture due to angle or offset deviation, and the boring accuracy is low, which cannot meet the production requirements.

Contents of the invention

In order to solve the above problems, the present invention provides an easy-to-adjust combined boring bar device, which adopts a separate structure of the boring bar and the connecting rod, has a simple structure, is easy to assemble and disassemble, is flexible in operation, and convenient in maintenance, improves the machining accuracy of the boring hole, and ensures The stability of processing quality improves processing efficiency.

In order to achieve the above object, the technical scheme that the present invention takes is:

A combined boring bar device that is easy to adjust, installed on a boring machine, including a boring bar, an extension rod, and a floating device. The floating device includes a taper handle connected to the main shaft of the boring machine, a positioning pin, and a hemispherical head screw. A blind hole coaxial with the taper shank, one end of the adapter is located in the blind hole, the other end of the adapter is coaxially connected with the boring bar, and the adapter and the taper shank are connected by a connecting pin along the radial direction of the taper shank and the adapter , There is an arc-shaped groove on the surface of the connecting pin along the circumference, and an internal thread hole coaxial with the post is provided on the end of the post along the axial direction. The positioning pin is located in the internal thread hole, and the hemispherical head screw is threaded in the In the threaded hole, the head of the hemispherical head screw is against the bottom of the blind hole of the taper shank. One end of the positioning pin is provided with a protruding spherical surface. The spherical surface of the positioning pin fits in the arc groove of the connecting pin. There is also a cylinder whose cylindrical surface is tangent to the spherical surface, and a spring is sleeved on the positioning pin. One end of the spring is against the shoulder of the cylinder, and the other end of the spring is against the tail of the hemispherical screw. A clearance distance is provided between the walls of the blind holes.

It also includes a guide device, the guide device includes a guide sleeve, a sleeve, and a boring die frame that are set on the peripheral surface of the connecting rod. There is a gland cover, and bearings are provided between the glands and the flanges at both ends. The bearings are supported between the guide sleeve and the boring frame. The sleeve is arranged between the bearings at both ends, and the two ends of the sleeve respectively On the outer ring of the bearings at both ends, the sleeve fits in the boring frame, the two ends of the guide sleeve are threadedly connected with the nuts that are against the end of the gland, and the circumferential gaps of the glands at both ends are respectively matched with the boring The end caps connected by the formwork, the ends of the end caps at both ends are respectively against the outer rings of the bearings at both ends, a guide groove is provided along the axial surface of the connecting rod, and a guide screw is threaded along the radial direction of the guide sleeve, and the guide screw The tail is located in the guide groove.

The gap distance between the peripheral surface of the connecting rod and the wall of the taper shank blind hole is in the range of 0.5-1 mm.

The taper shank includes a cylindrical end and a cone end. The cone end is connected to the main shaft of the boring machine. A through hole 1 is provided along the radial direction of the cylindrical end. A blind hole is provided at the end of the cylindrical end. A through hole 2 is provided along the radial direction of the connecting rod. The connecting pin passes through the first through hole and the second through hole, and the inner threaded hole of the connecting rod communicates vertically with the second through hole.

A groove is provided at one end of the connecting rod connected with the boring rod, and a protrusion matched with the groove is arranged at the end of the boring rod, and the boring rod and the connecting rod are connected by connecting screws.

Along one side of the axial surface of the boring bar, there is at least one boring tool installation hole with an included angle between the axis and the radial direction of the boring bar. The included angle between the axis of the boring tool installation hole and the radial direction of the boring bar is 10° to 45°. A boring tool is installed in the boring tool installation hole, the boring tool is fixed on the boring bar through a compression screw, an adjusting screw is threaded in the boring tool installing hole, and the end of the boring tool is in contact with the adjusting screw.

The end cover is connected with the boring frame through connecting screw 2, and an adjusting washer is arranged between the end cover and the boring frame.

A guide cylinder is arranged at the tail of the guide screw, and the guide cylinder is located in the guide groove.

A sealing felt ring is provided between the end cover and the gland.

The adjustable combined boring bar device of the present invention adopts the separate structure of the boring bar and the connecting bar, which is easy to assemble and disassemble, has a simple structure, and is convenient to maintain. It can be used for rough boring, semi-fine boring and fine boring workpiece In the present invention, it is only necessary to replace different boring bars. When the center line of the machine tool spindle and the center line of the boring frame have misalignment errors such as offset or deflection, the taper shank and the connecting rod can realize micro-floating through the connecting pin, positioning pin, spring, and hemispherical head screw to achieve automatic adjustment. The effect is to improve the machining accuracy of the boring hole. The amount of floating depends on the radial gap distance between the outer cylindrical surface at the right end of the adapter and the horizontal blind hole wall at the left end of the taper shank. The extension rod and the taper handle are easy to assemble and disassemble, and the extension rod and the taper handle can be assembled or disassembled by simply pushing or pushing out the connecting pin, which is convenient to operate. The post and the guide sleeve are guided by the guide screw, and the guide screw moves in the guide groove of the post, which can ensure that the post only moves relative to the guide sleeve without relative rotation, thereby ensuring that the post maintains a fixed angular position with respect to the guide sleeve , which is conducive to ensuring the stability of processing quality. The guide sleeve rotates with the bearing. Two angular contact ball bearings are installed on the guide sleeve. Grinding and adjusting washers can ensure that the end cover is pressed against the outer ring of the bearing, and the gland is pressed against the inner ring of the bearing through the nut. This configuration can increase the supporting rigidity of the bearing. The bearing can bear bidirectional axial load, has high precision and high deformation resistance; when the shaft is heated and elongated, the bearing clearance increases and the bearing will not be stuck. The left end of the connecting rod is processed with a groove, which matches with the protrusion on the right end of the boring bar, and the boring bar and the connecting rod are connected together by connecting screws. One or more groups of boring tools can be installed on the boring bar according to the needs, the position of the boring tool can be adjusted by adjusting the screw, and the boring tool can be fixed on the boring bar by two hexagon socket head compression screws, and multiple processes can be completed at the same time processing.

The invention has the advantages of simple structure, easy assembly and disassembly, flexible operation and convenient maintenance, improves the machining precision of the boring hole, ensures the stability of the machining quality, and improves the machining efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of an enlarged structure of the assembly place of the floating device.

In the figure: tapered handle 1, blind hole 1-1, cylindrical end 1-2, cone end 1-3, through hole 1-4, hemispherical head screw 2, spring 3, positioning pin 4, spherical surface 4-1 , shoulder 4-2, cylinder 4-3, connecting pin 5, arc groove 5-1, post 6, through hole 2 6-1, internal thread hole 6-2, guide groove 6-3, groove 6 -4, end cap 7, guide screw 8, guide cylinder 8-1, boring die frame 9, sleeve 10, guide sleeve 11, flange 11-1, gland 12, nut 13, boring bar 14, protrusion 14 -1, boring tool mounting hole 14-2, adjusting screw 15, workpiece 16, boring tool 17, compression screw 18, connecting screw one 19, sealing felt ring 20, bearing 21, adjusting washer 22, connecting screw two 23.

detailed description

Below in conjunction with the preferred embodiment shown in accompanying drawing, be described in further detail:

In Embodiment 1, see Figures 1 to 2, a combined boring bar device that is easy to adjust is installed on a boring machine, including a boring bar 14, an extension rod 6, a floating device, and a guiding device. Tapered shank 1, positioning pin 4, hemispherical head screw 2, a blind hole 1-1 coaxial with the tapered shank 1 is provided at the end of the tapered shank 1, one end of the connecting rod 6 is located in the blind hole 1-1, and the connecting rod The other end of 6 is coaxially connected with boring bar 14.

The taper shank 1 includes a cylindrical end 1-2 and a conical end 1-3, the conical end 1-3 is connected to the main shaft of the boring machine, a through hole 1-4 is provided along the radial direction of the cylindrical end 1-2, and a blind hole 1- 1 is located at the end of the cylindrical end 1-2, and a through hole 6-1 is provided along the radial direction of the connecting rod 6, and the connecting pin 5 passes through the through hole 1-4 and the through hole 6-1, and is connected to the connecting rod 6. The right end of 6 is axially provided with an internally threaded hole 6-2 coaxial with the connecting rod 6, and the internally threaded hole 6-2 of the connecting rod 6 communicates vertically with the second through hole 6-1.

The positioning pin 4 is located in the internally threaded hole 6-2, the outer cylindrical surface of the left end of the hemispherical head screw 2 is processed with external threads, the hemispherical head screw 2 is screwed into the internal threaded hole 6-2 at the right end of the connecting rod 6, and the hemispherical head screw 2 The head at the right end is a spherical surface, and the spherical surface is abutted on the bottom surface of the horizontal blind hole 1-1 at the left end of the taper handle 1. The middle surface of connecting pin 5 is provided with a circle of arc-shaped groove 5-1 along the circumference, and cylindrical helical compression spring 3 is housed on the outer cylindrical surface of locating pin 4 right-hand side, and locating pin 4 one end is provided with protruding spherical surface 4-1, in One end of the dowel pin 4 is also provided with a cylinder 4-3 tangent to the spherical surface, the left end of the spring 3 is against the shoulder 4-2 of the cylinder 4-3, and the right end of the spring 3 is against the left end of the hemispherical head screw 2. The spring 3 pushes the protruding spherical surface 4-1 at the left end of the positioning pin 4 into the arc-shaped groove 5-1 in the middle of the connecting pin 5 . When the connecting pin 5 is installed, the outer cylindrical surface of the connecting pin 5 pushes the positioning pin 4 to the right and compresses the spring 3. When the arc-shaped groove 5-1 in the middle of the connecting pin 5 reaches the position of the positioning pin 4, the spring 3 moves to the left Push the positioning pin 4, and the protruding spherical surface 4-1 at the left end of the positioning pin 4 falls into the arc-shaped groove 5-1 in the middle of the connecting pin 5, thereby connecting the connecting rod 6 and the taper shank 1 together. When the connecting pin 5 is pushed out, the outer cylindrical surface of the connecting pin 5 pushes the positioning pin 4 to the right, and compresses the spring 3, so that the connecting rod 6 and the taper handle 1 can be disassembled, and the operation is convenient. When the center line of the machine tool spindle and the center line of the boring frame 9 of the boring machine have misalignment errors such as offset or deflection, the taper handle 1 and the connecting rod 6 pass through the connecting pin 5, the positioning pin 4, the spring 3, and the hemispherical head screw 2. A small amount of floating can be realized, and the amount of floating depends on the radial gap distance H between the outer cylindrical surface at the right end of the rod 6 and the wall of the horizontal blind hole 1-1 at the left end of the taper shank 1. In this embodiment, the gap distance H is 0.6 mm.

The guiding device includes a guide sleeve 11, a sleeve 10, and a boring frame 9 that are placed on the peripheral surface of the connecting rod 6. The boring frame 9 is installed on the boring machine, and a ring of flanges 11-1 is provided along the circumference of the guide sleeve 11. The two ends of 11 are respectively covered with glands 12, bearings 21 are respectively provided between the glands 12 at both ends and the flange 11-1, the bearings 21 are supported between the guide sleeve 11 and the boring frame 9, and the sleeve 10 is set Between the bearings 21 at both ends and the two ends of the sleeve 10 are respectively against the outer rings of the bearings 21 at both ends, the sleeve 10 fits in the boring frame 9, and the two ends of the guide sleeve 11 are respectively threaded to resist the pressure The nuts 13 at the ends of the cover 12 are fitted with end caps 7 connected to the boring die frame 9 in the circumferential direction of the glands 12 at both ends, respectively, and the ends of the end caps 7 at both ends respectively abut against the outer rings of the bearings 21 at both ends .

The post 6 is processed with a guide groove 6-3, the guide sleeve 11 is equipped with a guide screw 8, the guide screw 8 is screwed into the threaded hole of the guide sleeve 11, and the guide cylinder 8-1 at the lower end of the guide screw 8 is guided by the guide post 6. Moving in the groove 6-3 can ensure that there is only relative movement between the connecting rod 6 and the guide sleeve 11 without relative rotation, thereby ensuring that the connecting rod 6 maintains a fixed angular position with respect to the guide sleeve 11, which is conducive to ensuring the stability of machining accuracy. Guide sleeve 11 rotates with bearing 21, and bearing 21 selects angular contact ball bearing for use, and two bearings 21 are installed on the guide sleeve 11, fills lubricating grease at each bearing 21 places during assembly, is convenient to the lubrication of bearing 21. This configuration can increase its supporting rigidity, and the bearing 21 can bear bidirectional axial loads, with high precision and high deformation resistance; when the shaft is heated and elongated, the clearance of the bearing 21 increases, and the bearing 21 will not be stuck.

The gland 12 abuts against the inner ring of the bearing 21 , and the gland 12 is pressed tightly by the nut 13 . A sealing felt ring 20 is installed between the end cover 7 and the gland 12 to achieve the purpose of sealing. An adjusting washer 22 is installed between the end cover 7 and the boring frame 9, and the adjusting washer 22 is ground to ensure that the end cover 7 is pressed against the outer ring of the bearing 21, and the end cover 7 is fixed on the two ends of the boring frame 9 by connecting screws 223. end.

The left end of the connecting rod 6 is provided with a groove 6-4, which cooperates with the protrusion 14-1 at the right end of the boring bar 14, and the boring bar 14 and the connecting rod 6 are connected together by connecting screw one 19.

Along one side of the axial surface of the boring bar 14, there are two boring tool mounting holes 14-2 with an included angle between the axes and the radial direction of the boring bar 14. The angle α between them is 30°. A boring tool 17 is installed in the boring tool installation hole 14-2. The boring tool 17 is fixed on the boring bar 14 through two hexagon socket head compression screws 18. -2 The internal thread is connected with an adjusting screw 15, and the adjusting screw 15 is against the end of the boring tool 17, and the position of the boring tool 17 can be adjusted through the adjusting screw 15.

When the present invention is boring the workpiece 16, the taper end 1-3 of the taper shank 1 is fixed on the main shaft of the boring machine. When there is an axial error, the taper shank 1 and the connecting rod 6 can realize a slight floating through the connecting pin 5, positioning pin 4, spring 3, and hemispherical head screw 2, which plays an automatic adjustment role and improves the machining accuracy of the boring. The connecting rod 6 and the tapered handle 1 are easy to assemble and disassemble, and the connecting rod 6 and the tapered handle 1 can be assembled or disassembled by simply pushing or pushing out the connecting pin 5, and the operation is convenient.

The connecting rod 6 and the guide sleeve 11 are guided by the guide screw 8, and the guide screw 8 moves in the guide groove 6-3 of the connecting rod 6, which can ensure that the connecting rod 6 only moves relatively in the guide sleeve 11 without relative rotation, thereby ensuring The connecting rod 6 maintains a fixed angular position with respect to the guide sleeve 11, which is beneficial to ensure the stability of the processing quality. The guide sleeve 11 rotates with the bearing 21. Two angular contact ball bearings 21 are installed on the guide sleeve 11. The grinding and adjusting washer 22 can ensure that the end cover 7 is pressed against the outer ring of the bearing 21, and the gland 12 is pressed by the nut 13. Close to the inner ring of the bearing 21, this configuration can increase the supporting rigidity of the bearing 21.

The structure of the boring bar 14 and the connecting bar 6 is separated, which is easy to assemble and disassemble, simple in structure, and convenient in maintenance. The present invention can be used for rough boring, semi-finish boring and fine boring workpieces, and only need to replace different boring bars 14. .

The above descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention within.

Claims (9)

1. null1. the combination boring bar device that a kind is conveniently adjusted，It is installed on boring machine，It is characterized in that: include boring bar、Extension bar、Floating installation，Floating installation includes the taper shank being connected with boring spindle、Alignment pin、Hemispherical head screw，It is provided with the blind hole coaxial with taper shank in the end of taper shank，One end of extension bar is positioned at blind hole，The other end of extension bar is coaxially connected with boring bar，By being connected along taper shank and extension bar connecting pin radially between extension bar with taper shank，On the surface of connecting pin circumferentially arranged with a circle arcuate groove，The internal thread hole coaxial with extension bar it is provided with vertically in the end of extension bar，Alignment pin is positioned at internal thread hole，Hemispherical head screw thread is connected in internal thread hole，The head of hemispherical head screw is butted on the bottom of the blind hole of taper shank，Alignment pin one end is provided with the spherical of protrusion，The spherical of alignment pin is matched with in the arcuate groove of connecting pin，The cylinder that periphery is tangent with spherical it is additionally provided with in alignment pin one end，Alignment pin is cased with spring，One end of spring is butted on the shaft shoulder of cylinder，The other end of spring is butted on the afterbody of hemispherical head screw，It is provided with clearance distance between peripheral surface and the blind hole hole wall of extension bar.
2. nullA kind of combination boring bar device being conveniently adjusted the most according to claim 1，It is characterized in that: also include guider，Guider includes the fairlead being placed on extension bar peripheral surface、Sleeve、Boring mould bracket，Boring mould bracket is installed on boring machine，It is circumferentially with a circle flange along fairlead，Gland it is cased with respectively at the two ends of fairlead，It is respectively equipped with bearing between the gland and flange at two ends，Bearings is between fairlead and boring mould bracket，Sleeve is arranged between the bearing at two ends，And the two ends of sleeve are butted on the outer ring of bearings at both ends respectively，Sleeve is matched with in boring mould bracket，The most threaded at the two ends of fairlead have the nut being butted on gland end，Circumference matched in clearance respectively at two ends gland has the end cap being connected with boring mould bracket，The end of two ends end cap is butted on the outer ring of bearings at both ends respectively，Axial surface along extension bar is provided with gathering sill，Radial direction along fairlead is threaded guider screw，The afterbody of guider screw is positioned at gathering sill.
3. A kind of combination boring bar device being conveniently adjusted the most according to claim 1 and 2, it is characterised in that: the clearance distance between peripheral surface and the taper shank blind hole hole wall of extension bar is in the range of 0.5～1mm.
4. A kind of combination boring bar device being conveniently adjusted the most according to claim 3, it is characterized in that: taper shank includes cylindrical end and cone segments, cone segments is connected with boring spindle, it is radially provided with through hole one along cylindrical end, blind hole is located at the end of cylindrical end, being radially provided with through hole two along extension bar, connecting pin passes through hole one, through hole two, and the internal thread hole of extension bar is vertical with through hole two to be communicated.
5. A kind of combination boring bar device being conveniently adjusted the most according to claim 1 and 2, it is characterized in that: be provided with groove in one end being connected with boring bar of extension bar, the end of boring bar is provided with the projection with fit depressions, is connected by attachment screw one between boring bar with extension bar.
6. A kind of combination boring bar device being conveniently adjusted the most according to claim 5, it is characterized in that: radially have the boring cutter installing hole of angle at least provided with an axis and boring bar along the side of boring bar axial surface, angle between the axis of boring cutter installing hole and boring bar radial direction is 10 °～45 °, in boring cutter installing hole, boring cutter is installed, boring cutter is fixed on boring bar by housing screw, connecting at boring cutter installing hole female thread and have adjustment screw, the end of boring cutter contacts with adjusting screw.
7. A kind of combination boring bar device being conveniently adjusted the most according to claim 2, it is characterised in that: end cap is connected with boring mould bracket by attachment screw two, is provided with adjustment packing ring between end cap and boring mould bracket.
8. A kind of combination boring bar device being conveniently adjusted the most according to claim 2, it is characterised in that: the afterbody at guider screw is provided with guide cylinder, and guide cylinder is positioned at gathering sill.
9. A kind of combination boring bar device being conveniently adjusted the most according to claim 2, it is characterised in that: between end cap and gland, it is provided with sealing felt collar.