CN209868050U

CN209868050U - High-precision cutter bar clamping device

Info

Publication number: CN209868050U
Application number: CN201920619982.0U
Authority: CN
Inventors: 宋奎星
Original assignee: Shandong Dashan Stainless Steel Products Co Ltd
Current assignee: Shandong Dashan Stainless Steel Products Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2019-12-31
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a high accuracy cutter arbor clamping device, which comprises a base, the position sleeve, the inner tube, the cutter arbor, the position sleeve is fixed on the base, the inner tube inserts in the position sleeve, the inner tube has the bell mouth that links to each other around, the installation cavity, the rear end of cutter arbor has toper connecting portion, the blind rivet is installed to toper connecting portion rear end, the blind rivet has expanded connector, toper connecting portion insert in the bell mouth, gliding movable rod around the installation can be in the position sleeve, the front portion of movable rod inserts in the installation cavity, install on the movable rod and have the spring of effort forward to internal section of thick bamboo, the spring clamp that is used for the centre gripping connector is installed to the front end of movable rod, fit with a contraceptive ring cloth and install a plurality of stoppers on the preceding terminal surface of position sleeve, be equipped with the annular on the cutter arbor and keep off the edge. The utility model discloses the cutter arbor carries out axial and radial positioning, makes the cutter of installing on the cutter arbor keep accurate operating position, guarantees that processing is accurate, also makes things convenient for the dismouting of cutter arbor.

Description

High-precision cutter bar clamping device

Technical Field

The utility model relates to a high accuracy cutter arbor clamping device.

Background

The cutter bar clamping device is needed to be used for installing the cutter on the machine tool and comprises a base and a cutter bar, the base is connected to a main shaft of the machine tool, a clamping mechanism is arranged between the base and the cutter bar to enable the cutter bar to be a detachable part, and the cutter is installed on the cutter bar. Different cutters are installed on different cutter bars, only need during the change cutter bar pull down the cutter bar change can, the rear end of cutter bar usually is equipped with toper connecting portion, utilizes toper connecting portion to be connected with clamping mechanism, and toper connecting portion adopt morse's tapering, utilizes morse's tapering to realize the location to the cutter bar, makes cutter bar and lathe main shaft concentric, adopts this kind of structure admittedly convenient to use, but the axial position of cutter bar has the deviation, influences the machining precision of work piece.

Disclosure of Invention

The utility model aims at the above-mentioned problem provide a can confirm cutter arbor axial position's high accuracy cutter arbor clamping device.

In order to achieve the purpose, the utility model comprises a base, a positioning sleeve, an inner cylinder and a cutter bar, and is characterized in that the positioning sleeve is fixed at the front end of the base, the inner cylinder is inserted into the positioning sleeve, the inner cylinder is provided with a tapered hole and an installation cavity which are connected with each other in front and back, the diameter of the tapered hole is gradually reduced from the front to the back, the back end of the cutter bar is provided with a tapered connecting part, the diameter of the tapered connecting part is gradually reduced from the front to the back, the back end of the tapered connecting part is provided with a draw nail, the back end of the draw nail is provided with an expanded connector, the tapered connecting part is inserted into the tapered hole, the outer conical surface of the tapered connecting part is contacted with the inner conical surface of the tapered hole, a movable rod capable of sliding back and forth is arranged in the positioning sleeve, the movable rod is connected with an adjusting handle extending out of the positioning sleeve, the front part, a plurality of stoppers are arranged on the front end face of the positioning sleeve in a ring-shaped mode, the cutter bar is provided with an annular blocking edge capable of being pressed on the stoppers, a plurality of clamping grooves are formed in the front end face of the inner cylinder, and the end portions of the stoppers extend into the clamping grooves.

The working principle of the high-precision cutter bar clamping device is as follows: the taper connecting portion insert the bell mouth, the connector part of blind rivet is cliied to the spring clamp, lean on the inner tube forward in the spring and lean on the movable rod backward, can pull the cutter arbor backward and push away the inner tube forward from this, the outer conical surface of taper connecting portion can combine together with the interior conical surface of bell mouth, it is coaxial with the lathe main shaft to guarantee the cutter arbor, the stopper inserts in the draw-in groove, can prevent that the inner tube from rotating for the position sleeve, the annular of the preceding terminal surface of stopper on the cutter arbor is kept off along having limiting displacement, can guarantee from this that the axial position of cutter arbor is accurate. Through the above description, it is obvious that the high-precision cutter bar clamping device can ensure that the cutter bar is coaxial with a machine tool main shaft and can axially position the cutter bar, so that a cutter arranged on the cutter bar keeps an accurate working position and machining accuracy is ensured.

The spring clamp comprises a plurality of spring clamping pieces which are annularly arranged on the movable rod, the front end parts of the spring clamping pieces are gathered together towards the middle, the front ends of the spring clamping pieces are provided with limiting heads which are outwards bent, and the inner wall of the front end of the installation cavity is provided with an annular groove which can be used for the limiting heads to enter the movable rod when the movable rod moves forwards to a set position. The movable rod can move forwards during installation of the cutter bar, the connector of the blind rivet struts each spring clamping piece, the ring groove can be used for allowing the limiting head to enter so as to facilitate continuous insertion of the blind rivet, the front end parts of the spring clamping pieces are gathered towards the middle and can clamp the connector between the spring clamping pieces, after the movable rod moves backwards to the rear working position, the limiting head leaves the ring groove and is limited by the inner wall of the installation cavity, each spring clamping piece cannot stretch outwards, backward tensioning force of the blind rivet can be kept, and the outer conical surface of the conical connecting part can be combined with the inner conical surface of the conical hole. The spring clamp has good tensioning force on the draw nail, and is convenient for installing the cutter bar.

The rear portion of installation cavity is the step hole structure, and the step hole includes continuous first hole and second hole around, and the diameter in first hole is less than the diameter in second hole, installs spacing stopper in the second hole, and the front end of spacing stopper is equipped with the projection, and the projection inserts in the first hole, is equipped with the guide hole that link up around on the spacing stopper, and the movable rod passes the guide hole, and the front end top of spring is leaned on the rear end face of spacing stopper. The limiting plug has a limiting effect on the front end of the spring, the guide hole in the limiting plug has a guiding effect on the movable rod, the spring clamp can be installed on the movable rod firstly when the high-precision cutter bar clamping device is assembled, then the front portion of the movable rod is inserted into the installation cavity, and then the spring is sleeved to fix the rear end of the spring, so that the installation is very convenient.

The rear end of the movable rod is provided with a pin hole vertical to the axis of the movable rod, the adjusting handle comprises a limiting pin arranged in the pin hole, two long holes extending front and back are formed in the positioning sleeve, and two ends of the limiting pin penetrate through one long hole respectively and extend out of the positioning sleeve. Insert the spacer pin with spring suit accessible after on the movable rod and carry on spacingly to its rear end, consequently the spacer pin can not only regard as the handle to use, and it still has limiting displacement to the spring, has dual function, can simplify this from this the utility model discloses an overall structure, it is convenient the utility model discloses an equipment.

The both ends of spacer pin all are established and are installed spacing ball, are equipped with the hole on the spacing ball, are equipped with external screw thread, internal thread respectively on spacer pin and the spacing ball hole and are connected through the screw thread, and the diameter of spacing ball is greater than the width of slot hole. After adopting above-mentioned structure, can adopt clearance fit between spacer pin and the pinhole, it is more convenient to install, and spacing ball has the limiting displacement, can prevent that the pinhole from droing.

The upper cover of movable rod is equipped with the stop collar, is equipped with two through-holes on the stop collar, and the both ends of spacer pin pass two through-holes on the stop collar respectively, and the rear end of spring top is leaned on the preceding terminal surface of stop collar. The front end face of the limiting sleeve is contacted with the spring, so that the acting force of the spring can be better exerted.

The base comprises a disc body and a cylinder body connected to the rear end of the disc body, a connecting flange is arranged at the rear end of the positioning sleeve, and the connecting flange is connected with the disc body through a plurality of connecting bolts distributed according to the circumference. The cylinder body is used for being connected with a main shaft of a machine tool, the positioning sleeve is connected with the disc body through a flange, the connection mode is firm, and the movable rod, the inner cylinder and the like can be completely sealed after connection is completed to form protection for the movable rod, the inner cylinder and the like.

To sum up, the utility model can ensure that the cutter bar is coaxial with the main shaft of the machine tool, and can also axially position the cutter bar, so that the cutter arranged on the cutter bar can keep an accurate working position, and the processing accuracy is ensured; in addition, the assembly and disassembly of the cutter bar are also more convenient.

Drawings

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of the structure of fig. 1 taken along line a-a.

Detailed Description

Referring to the attached drawings, in the first embodiment of the present invention, a high precision cutter bar holding device comprises a base 1, a positioning sleeve 2, an inner cylinder 3, a cutter bar 4, the positioning sleeve 2 is fixed at the front end of the base 1, the inner cylinder 3 is inserted into the positioning sleeve 2, the inner cylinder 3 has a tapered hole 5 and a mounting cavity 6 which are connected with each other in the front and back direction, the diameter of the tapered hole 5 is gradually reduced from the front to the back direction, the back end of the cutter bar 4 has a tapered connecting portion 7 whose diameter is gradually reduced from the front to the back direction, a pull nail 8 is installed at the back end of the tapered connecting portion 7, an expanding connector 9 is arranged at the back end of the pull nail 8, the tapered connecting portion 7 is inserted into the tapered hole 5, the outer conical surface of the tapered connecting portion 7 is in contact with the inner conical surface of the tapered hole 5, a movable rod 10 which can slide back and forth is installed in the positioning sleeve 2, an adjusting handle which extends, install the spring 30 that has forward effort to inner tube 3 on the movable rod 10, the spring clamp 11 that is used for centre gripping connector 9 is installed to the front end of movable rod 10, and a plurality of stoppers 12 are installed to the cover on the preceding terminal surface of position sleeve 2, are equipped with on the cutter arbor 4 to press and keep off along 29 on stopper 12, are equipped with a plurality of draw-in grooves 13 on the preceding terminal surface of inner tube 3, and the tip of stopper 12 stretches into in the draw-in groove 13.

The working principle of the high-precision cutter bar clamping device is as follows: the taper connecting part 7 is inserted into the taper hole 5, the spring clamp 11 clamps the connector 9 part of the blind rivet 8, the spring 30 is pushed forward against the inner cylinder 3 and pushed backward against the movable rod 10, therefore, the cutter bar 4 can be pulled backward and the inner cylinder 3 can be pushed forward, the outer conical surface of the taper connecting part 7 can be combined with the inner conical surface of the taper hole 5, the cutter bar 4 is ensured to be coaxial with a machine tool spindle, the limiting block 12 is inserted into the clamping groove 13, the inner cylinder 3 can be prevented from rotating relative to the positioning sleeve 2, the front end surface of the limiting block 12 has a limiting effect on the annular retaining edge 29 on the cutter bar 4, and therefore, the accuracy of the axial position of the cutter bar 4 can be. It can be seen from the above description that the high-precision cutter bar clamping device can ensure that the cutter bar 4 is coaxial with the machine tool spindle, and can also axially position the cutter bar, so that a cutter arranged on the cutter bar 4 keeps an accurate working position, and the machining accuracy is ensured.

The spring clamp 11 comprises a plurality of spring clamping pieces 14 which are annularly arranged on the movable rod 10, the front end parts of the spring clamping pieces 14 are gathered together towards the middle, the front ends of the spring clamping pieces 14 are provided with limiting heads 31 which are outwards bent, and the inner wall of the front end of the installation cavity 6 is provided with annular grooves 32 which can allow the limiting heads 31 to enter the movable rod 10 when the movable rod moves forwards to a set position. Can make the movable rod 10 forward motion during installation cutter arbor 4, the connector 9 of blind rivet 8 struts each spring clip 14, annular 32 can supply spacing head 31 to get into so that continuation of blind rivet 8 inserts, the preceding tip of spring clip 14 is all gathered together to the centre can be with connector 9 centre-clamping between them, after movable rod 10 backward motion reaches rear portion operating position, spacing head 31 leaves annular 32, receive the restriction of the 6 inner walls of installation cavity, each spring clip 14 just can not outwards open, can keep the tightening force to blind rivet 8 backward from this, make the external conical surface of toper connecting portion 7 combine together with the interior conical surface of bell mouth 5. The spring clamp 11 has good tensioning force for the blind rivet 8 and also facilitates the installation of the tool holder 4.

The rear portion of installation cavity 6 is the step hole structure, the step hole includes first hole 18 and the second hole 19 that links to each other around, the diameter of first hole 18 is less than the diameter of second hole 19, install spacing stopper 20 in the second hole 19, the front end of spacing stopper 20 is equipped with projection 21, projection 21 inserts in first hole 18, be equipped with the guiding hole 22 that link up around on the spacing stopper 20, movable rod 10 passes guiding hole 22, the front end top of spring 30 is leaned on the rear end face of spacing stopper 20. Spacing stopper 20 has limiting displacement to spring 30's front end, and guiding hole 22 on the spacing stopper 20 has a guide effect to movable rod 10, and high accuracy cutter arbor clamping device can install spring clamp 11 on movable rod 10 earlier when the equipment, inserts the anterior of movable rod 10 in installation cavity 6 again, then sheathe in spring 30 fix its rear end can, it is very convenient to install.

The rear end of the movable rod 10 is provided with a pin hole 15 vertical to the axis of the movable rod, the adjusting handle comprises a limit pin 16 installed in the pin hole 15, two long holes 17 extending back and forth are formed in the positioning sleeve 2, and two ends of the limit pin 16 penetrate through one long hole 17 respectively and extend out of the positioning sleeve 2. Insert the spacer pin 16 to carry on spacingly to its rear end with spring 30 suit accessible after on movable rod 10, consequently spacer pin 16 can not only regard as the handle to use, and it still has limiting displacement to spring 30, has dual function, can simplify from this the utility model discloses an overall structure, it is convenient the utility model discloses an equipment.

Limiting balls 24 are arranged at two ends of the limiting pin 16, inner holes are formed in the limiting balls 24, external threads and internal threads are arranged in the inner holes of the limiting pin 16 and the limiting balls 24 respectively and are connected through threads, and the diameter of each limiting ball 24 is larger than the width of each long hole 17. After adopting above-mentioned structure, can adopt clearance fit between spacer pin 16 and the pinhole 15, it is more convenient to install, and spacing ball 24 has limiting displacement, can prevent that pinhole 15 from droing.

The upper cover of movable rod 10 is equipped with stop collar 23, is equipped with two through-holes on the stop collar 23, and the both ends of spacer pin 16 pass two through-holes on the stop collar 23 respectively, and the rear end of spring 30 is leaned on the preceding terminal surface of stop collar 23. The front end surface of the stop sleeve 23 is contacted with the spring 30, so that the acting force of the spring 30 can be better exerted.

The base 1 comprises a disc body 25 and a cylinder 26 connected to the rear end of the disc body 25, the rear end of the positioning sleeve 2 is provided with a connecting flange 27, and the connecting flange 27 is connected with the disc body 25 through a plurality of connecting bolts 28 distributed according to the circumference. The cylinder 26 is used for being connected with a main shaft of a machine tool, the positioning sleeve 2 is connected with the disc body 25 through a flange, the connection mode is firm, and the movable rod 10, the inner cylinder 3 and the like can be completely sealed after connection is completed to protect the movable rod and the inner cylinder.

To sum up, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications are intended to be within the scope of the present invention.

Claims

1. A high-precision cutter bar clamping device comprises a base (1), a positioning sleeve (2), an inner barrel (3) and a cutter bar (4), and is characterized in that the positioning sleeve (2) is fixed at the front end of the base (1), the inner barrel (3) is inserted into the positioning sleeve (2), the inner barrel (3) is provided with a tapered hole (5) and an installation cavity (6) which are connected with each other from front to back, the diameter of the tapered hole (5) is gradually reduced from the front to back, the rear end of the cutter bar (4) is provided with a tapered connecting part (7) of which the diameter is gradually reduced from the front to back, the rear end of the tapered connecting part (7) is provided with a pull nail (8), the rear end of the pull nail (8) is provided with an expanded connector (9), the tapered connecting part (7) is inserted into the tapered hole (5), the outer conical surface of the tapered connecting part (7) is contacted with the inner conical surface of the tapered hole (5, be connected with on movable rod (10) and stretch out the outer adjustment handle of position sleeve (2), the front portion of movable rod (10) is inserted in installation cavity (6) of inner tube (3), install spring (30) that have forward effort to inner tube (3) on movable rod (10), spring clamp (11) that are used for centre gripping connector (9) are installed to the front end of movable rod (10), a plurality of stopper (12) are installed to the ring cloth on the preceding terminal surface of position sleeve (2), it keeps off along (29) to be equipped with the annular that can press on stopper (12) on cutter arbor (4), be equipped with a plurality of draw-in grooves (13) on the preceding terminal surface of inner tube (3), the tip of stopper (12) stretches into in draw-in groove (13).

2. A high precision cutter bar holding device as claimed in claim 1, wherein said spring clip (11) comprises a plurality of spring clips (14) annularly mounted on the movable rod (10), the front ends of the spring clips (14) are gathered towards the middle, the front ends of the spring clips (14) are provided with limiting heads (31) bent outwards, and the inner wall of the front end of the mounting cavity (6) is provided with a ring groove (32) for the limiting heads (31) to enter when the movable rod (10) moves forwards to a set position.

3. A high precision cutter bar holding device according to claim 1, characterized in that the rear portion of the mounting cavity (6) is a stepped hole structure, the stepped hole comprises a first hole (18) and a second hole (19) which are connected in front and back, the diameter of the first hole (18) is smaller than that of the second hole (19), a limiting plug (20) is installed in the second hole (19), a convex column (21) is arranged at the front end of the limiting plug (20), the convex column (21) is inserted into the first hole (18), a guide hole (22) which is through in front and back is arranged on the limiting plug (20), the movable rod (10) passes through the guide hole (22), and the front end of the spring (30) abuts against the rear end face of the limiting plug (20).

4. A high precision cutter arbor clamping device as defined in claim 3, characterized in that the rear end of the movable rod (10) is provided with a pin hole (15) perpendicular to the axis thereof, the adjusting handle comprises a limit pin (16) mounted in the pin hole (15), the positioning sleeve (2) is provided with two long holes (17) extending forward and backward, and both ends of the limit pin (16) respectively extend out of the positioning sleeve (2) through one long hole (17).

5. A high-precision cutter bar holding device as claimed in claim 4, wherein the two ends of the limiting pin (16) are provided with limiting balls (24), the limiting balls (24) are provided with inner holes, the inner holes of the limiting pin (16) and the limiting balls (24) are respectively provided with external threads and internal threads and are connected through threads, and the diameter of each limiting ball (24) is larger than the width of each long hole (17).

6. A high-precision cutter bar holding device as claimed in claim 4, wherein said movable rod (10) is sleeved with a position-limiting sleeve (23), the position-limiting sleeve (23) is provided with two through holes, two ends of the position-limiting pin (16) respectively pass through the two through holes of the position-limiting sleeve (23), and the rear end of the spring (30) abuts against the front end surface of the position-limiting sleeve (23).

7. A tool bar holding apparatus with high precision as claimed in claim 1 wherein said base (1) comprises a disc body (25) and a cylinder (26) connected to the rear end of the disc body (25), the rear end of the positioning sleeve (2) is provided with a connecting flange (27), and the connecting flange (27) is connected to the disc body (25) by a plurality of connecting bolts (28) distributed circumferentially.