DE4448024B4 - Annular cutter for drilling machine - has arbor with end bore and holding holes for locks to correct it to annular cutter - Google Patents

Annular cutter for drilling machine - has arbor with end bore and holding holes for locks to correct it to annular cutter

Info

Publication number
DE4448024B4
DE4448024B4 DE4448024A DE4448024A DE4448024B4 DE 4448024 B4 DE4448024 B4 DE 4448024B4 DE 4448024 A DE4448024 A DE 4448024A DE 4448024 A DE4448024 A DE 4448024A DE 4448024 B4 DE4448024 B4 DE 4448024B4
Authority
DE
Germany
Prior art keywords
hole cutter
132a
132c
132b
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE4448024A
Other languages
German (de)
Other versions
DE4448024C5 (en
Inventor
Osamu Asano
Yutaka Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Kohki Co Ltd
Original Assignee
Nitto Kohki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to JP5183522A priority Critical patent/JP2558053B2/en
Priority to JP5183523A priority patent/JP2558054B2/en
Priority to JP5-183523 priority
Priority to JP5-183522 priority
Application filed by Nitto Kohki Co Ltd filed Critical Nitto Kohki Co Ltd
Priority to DE4422342A priority patent/DE4422342C2/en
Application granted granted Critical
Publication of DE4448024B4 publication Critical patent/DE4448024B4/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39466076&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE4448024(B4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Anticipated expiration legal-status Critical
Publication of DE4448024C5 publication Critical patent/DE4448024C5/en
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/04Drills for trepanning
    • B23B51/0406Drills with a tubular body
    • B23B51/0473Drills with a tubular body details about the connection between the driven shaft and the tubular cutting part
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02Chucks
    • B23B31/10Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/107Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
    • B23B31/1071Retention by balls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/04Drills for trepanning
    • B23B51/0406Drills with a tubular body
    • B23B51/0426Drills with a tubular body with centering devices

Abstract

A hole cutter (130A, 130B, 130C) releasably supported in a shaft (101) having a cylindrical central bore (102) formed therein open toward one end of the shaft (101), the hole cutter comprising:
a substantially cylindrical shank portion (132A, 132B, 132C) having an upper end for insertion into the central cylindrical bore (102) from the one end of the shaft (101), the shank portion (132A, 132B, 132C) having a diameter, which is substantially equal to that of the central cylindrical bore (102) and comprises
Blocking member passage means (133) formed on a circumference of the shaft portion (132A, 132B, 132C) and having entry portions at the upper end of the shaft portion (132A, 132B, 132C) at the same angular intervals as the locking members (113) in the shaft (101) are provided, wherein the locking elements (113) between a first depth position, in which the locking elements (113) partially in the cylindrical central bore (102) protrude, and a second depth position can be positioned, ...

Description

  • The Invention concerned itself with a ring cutter or hole cutter connection device for connecting a ring cutter or hole cutter with a Drilling machine for drilling relatively deep openings used in a workpiece made of a hard material becomes. Further dealt with the invention with a ring cutter or hole cutter, which by means of such a connection device with a drill connected is. In particular, the invention relates to a Hole cutter connecting device for connecting a hole cutter with a drill in a simple way, with only one for the drill suitable hole cutter is recorded and it is prevented that any unsuitable hole cutter connect to the drill leaves. Also is concerned the invention with a related Design of a hole cutter.
  • A usual drill for creating a hole in a hard material made of workpiece generally forms openings characterized in that one a ring cutter or hole cutter, which down-facing cutting edges has, with a constant speed or rotational speed and drives a corresponding feed. When creating a hole in a workpiece made of a hard material below Use of this drill, it is necessary to use the existing Replace hole cutter if this is not for the workpiece to be drilled suitable is.
  • It various hole cutter connecting devices have been proposed which facilitate the replacement of hole cutters, and there were already proposed hole cutter, which is based on simple Have it replaced. There are a lot of different ones Hole cutter connecting devices, of which the simplest embodiment connecting a hole cutter to a shaft by means of a screw, while a relatively complicated design thereof blocking elements, such as balls, uses to hold the shaft.
  • A hole cutter connecting device which has a relatively complicated design is disclosed in U.S. Patent No. 5,348,347 Japanese Patent Application No. 62-74515 Such a device is described below with reference to FIGS 15 and 16 is explained.
  • A conventional hole cutter or ring cutter connection device 1 is with a wave 2 a drilling machine (not shown), and the rotational movement and the advancing movement required for the drilling operation are transferred from the drilling machine to the hole cutter 8th transfer. A cylindrical, rotary transmitting part 3 is rotatable with the shaft 2 with the help of a wedge 4 connected. A plurality of retaining openings 6 for holding fixation balls 5 is in the transverse wall of the lower portion of the rotary transmitting member 3 formed such that these openings to the axis of the rotary transmitting part 3 point.
  • On an intermediate portion of the inner peripheral surface of the rotary transmitting member 3 is a plurality of engaging portions 7 ( 16 ), which are directed towards the central axis of the part 3 run and the rotational movement of the rotary transmitting part 3 on the hole cutter 8th transfer. A sliding sleeve 9 , by means of which the fixing balls 5 in the direction of the central axis of the rotary transmitting part 3 be pressed surrounds the rotary transmitting part 3 such that it is axially slidably arranged for this purpose. Between the sliding sleeve 9 and the rotary transmitting part 3 is a compression coil spring 10 provided, which the sliding sleeve 9 pushes down. The sliding sleeve 9 is with the help of a retaining ring 11 held firmly with the outer peripheral surface of the rotary transmitting member 3 is connected such that the sliding sleeve 9 is prevented from being from the rotary transmitting part 3 slides.
  • The hole cutter 8th has a downwardly open, cylindrical body which has a plurality of blades (not shown) which are ausgebilet at the lower end thereof. At the upper end of the cylindrical body is a cylindrical shaft portion 12 is formed, which in the lower portion of a cylindrical central opening (hereinafter referred to as "fixing opening") is inserted, which from the inner peripheral surface of the rotary transmitting member 3 is formed. Axially projecting sections 13 , which engage with the engaging portions 7 can be brought are on the upper end of the shaft portion 12 educated. An annular recess or an annular groove 14 for receiving the fixing balls 5 is on an intermediate portion of the outer peripheral wall of the shaft portion 12 educated.
  • A center pen 15 for determining the drilling position is axially slidable through the central opening of the hole cutter 8th carried out. An annular engagement recess 16 for receiving intervention balls 17 is in the upper end portion of the center pin 15 educated. The hole cutter 8th is with the wave 2 and the fixing hole connected by the engagement balls 17 into the engagement recess 16 be pressed. The middle pen 15 is by a compression coil spring 18 over the balls 17 pressed down, and a sealing element 19 comes to rest against the upper shoulder of one another annular recess 20 such that cutting oil is prevented from the cylindrical central opening in the shaft 2 can flow down when the center pin 15 is not in use. During the drilling process, however, the lower end tip of the center pin 15 versus. pressed a workpiece to be drilled (not shown), which is made of a hard material, and the center pin 15 is in a fixing position in the rotary transmitting part 3 against the pressure force of the compression coil spring 18 pressed. Consequently, the sealing element comes 19 from the shoulder of the annular recess 20 the hole cutter 8th free, and that of the cylindrical opening of the shaft 2 supplied cutting oil reaches the cutting edges of the hole cutter 8th , whereby the drilling process can be carried out uniformly.
  • The hole cutter 8th is fixed to the rotary transmitting member in the manner described below 3 connected. First, the sliding sleeve 9 against the pressure force of the compression coil spring 10 moved upwards. Then the shaft portion becomes 20 the hole cutter 8th in the fixing opening of the rotary transmitting part 3 Introduced until the projecting sections 13 with the engaging portions 7 work together. In this state is the sliding section 21 the sliding sleeve 9 from the fixing balls 5 moved away, and the fixing balls 5 are the cylindrical ball outlet opening 22 the sleeve 9 facing, so that the balls 5 can move radially outward. Thus, the shaft portion becomes 12 the hole cutter 8th free in the cylindrical opening of the rotary transmitting part 3 introduced.
  • If the hole cutter 8th completely in the rotary transmitting part 3 is introduced, the sliding sleeve 9 released. Then the sliding sleeve 9 by the pressure force of the compression coil spring 10 pressed down, and the fixing balls 5 be in the annular recess 14 of the shaft portion 12 pressed. This is the hole cutter 8th firmly with the rotary transmitting part 3 connected.
  • At the Creating a hole in a made of a hard material workpiece must the now located on the drill hole cutter through replacing a hole cutter having a diameter, the for the trainees openings is suitable when the hole cutter, which is now at the Drill is located, does not have a diameter suitable for this purpose.
  • However, the conventional hole cutter connecting device can arrange any hole cutter in operative connection with the shaft, provided that the inner diameter of the fixing hole of the rotary transmitting member matches the outer diameter of the shaft portion of the hole cutter, and the annular recess coincides with the fixing balls. Therefore, it can sometimes happen that a hole cutter, which is not suitable for the performance of a drill and for the material of a workpiece, erroneously with the shaft 2 is connected. If drilling is continued without detection of this error, an unexpectedly high cutting resistance is produced during the drilling operation. As a result, there is a tendency that the drive means of the drill is damaged and / or the cutting edges of the hole cutter 8th easily prone to break.
  • If only the cutting edges break, this difficulty can be eliminated by using the hole cutter 8th replaced by a suitable one. However, if the driving means of the drilling machine is disturbed, the drilling operation must be interrupted for a long period of time to repair the driving means, so that there is a disturbance of the predetermined manufacturing process. If the hole cutter 8th is not suitable for the material of a workpiece, burrs can easily occur, whereby the dimensional accuracy of the openings formed is reduced, although openings can be formed. When cutting chips are around the hole cutter 8th sometimes the sliding sleeve will wrap 9 against the pressure force of the compression coil spring 10 pushed up, and the hole cutter 8th may unintentionally come off or he may be off the shaft 2 come free.
  • If the hole cutter 8th stuck with the shaft 2 is connected, as in 16 is shown, the sliding sleeve 9 moved down so _daß the Lochschneider-Fixierkugeln 5 to the exit opening 22 fit, which in the lower end portion of the sliding sleeve 9 is formed, and that they have a ready position in the outlet opening 22 taking. In the conventional hole cutter connection device 1 With the general structure described above, a part of each ball protrudes 5 from the inner circumferential surface of the rotary transmitting member 3 in a central bore, which of the inner peripheral surface of the rotary transmitting part 3 ( 15 ) is formed. Plane surfaces 23 , which each have a depth corresponding to the extension size of the respective ball 5 in the center hole are on the parts of the outer peripheral surface of the shaft portion 12 the hole cutter 8th formed, these parts of the annular recess 14 to the upper end of the shaft portion 12 extend. When the shaft section 12 stuck with the shaft 2 connected are the flat surfaces 23 to the assigned balls 5 aligned, and then the shank portion in pressed the center hole.
  • Any hole cutter can handle the shaft 2 be connected, provided that the hole cutter with a shaft portion 12 is provided, which has an outer diameter which is the inner diameter of the central opening of the shaft 2 corresponds, and flat surfaces 23 for receiving the balls 5 has, which is different from the holding openings 6 extend into the central opening. Thus, one can the objective, according to which only a suitable hole cutter can be firmly connected to a special wave, in the usual design of the hole cutter 1 do not reach.
  • In the tested Japanese Utility Model Application No. 64-3603 A conventional embodiment of a hole cutter connecting device is described in which a bolt or a screw is used, by means of which a hole cutter is connected to a shaft. This usual device will be described below with reference to 17 described. The shaft section 24 a hole cutter gets into the center hole 26 a wave 25 introduced. Then a fixing screw 27 which in the wave 25 is provided, rotated to engage a flat surface 28 which come in the transverse wall or side wall of the shaft portion 24 is formed, and then the hole cutter with the shaft 25 connected. The center 01 of the shaft portion 28 should be with the center 02 of the receiving opening 26 the wave 25 to match. In reality, however, lead to minor manufacturing errors of the shaft portion 24 and the receiving opening 26 and / or fitting tolerances between them to a center shift δ which is in a range of 1/100 to 1/50 mm. This displacement leads to an eccentricity of the hole cutter, resulting in adverse effects on the hole cutter.
  • From the publication DE 28 22 553 A1 a chuck is known which has balls which are radially movable and engage in recesses of the tool shank in the inserted state of a tool. The chuck has a collar member which is rotatable about its axis. The collar member has recesses into which the balls for removing the tool from the chuck fall, so that they no longer protrude into the interior of the chuck.
  • From the US 3 747 946 A a conical tool holder for cutting tools with conical shaft is known, which has in its central axial region a flat surface, and a cam surface. The flat surfaces serve as a stop for locking pins, which protrude into the central bore when pressed when turning a cam in the central bore of the tool holder.
  • Of the present invention is based on the object, a hole cutter and to provide a hole cutter connecting device, with the a hole cutter in a simple manner by means of a one-hand operation can be used and replaced. In addition to a safe and reliable Fixing the hole cutter is also the insertion of not adapted to the connecting device hole cutters can be prevented thus accidents and erroneous processing can be avoided.
  • The Asked object according to the invention with a hole cutter Claim 1 solved. advantageous Embodiments of the hole cutter according to the invention are in the dependent claims 2 to 8 indicated.
  • The This object is further achieved by a hole cutter connecting device according to claim 9 solved. In the dependent of claim 9 dependent claims 10 to 20 are advantageous embodiments the hole cutter device according to the invention indicated.
  • Further Details, features and advantages of the invention will become apparent the following description of preferred embodiments below Reference to the attached Drawing. It shows:
  • 1 a longitudinal sectional view of a main part of a hole cutter connecting device according to a preferred embodiment of the invention, wherein a hole cutter to be connected to the shaft of the device is shown separated from the device,
  • 2 a longitudinal sectional view of a main part of the hole cutter connecting device according to 1 wherein the hole cutter is shown connected to the shaft in connected condition,
  • 3 a longitudinal sectional view of a sliding sleeve of the hole cutter connecting device according to 1 .
  • 4 a sectional view taken along the line 7-7 in 3 .
  • 5 a sectional view taken along the line 8-8 in 1 .
  • 6 a sectional view taken along the line 9-9 in 1 .
  • 7 a sectional view taken along the line 10-10 in 2 .
  • 8th a front view of a first preferred embodiment of a hole cutter or ring cutter according to the invention,
  • 9 a side view of the hole cutter after 8th .
  • 10 a cross-sectional view of second and third preferred embodiments of the hole cutter according to the present invention,
  • 11 a front view of the third preferred embodiment of the hole cutter according to the invention,
  • 12 a side view of the third preferred embodiment of the hole cutter,
  • 13 a front view of a fourth preferred embodiment of the hole cutter according to the invention,
  • 14 a side view of the in 13 shown hole cutters,
  • 15 a longitudinal sectional view of a conventional hole cutter connecting device,
  • 16 a side view of a main part of the hole cutter connecting device according to 15 , and
  • 17 a cross-sectional view of a mounting portion of another conventional hole cutter connecting device using a fastening screw, which serves to attach a hole cutter here.
  • below become a hole cutter connecting device and a hole cutter after of the invention with reference to preferred embodiments with reference on the attached drawing explained in more detail. First is a hole cutter connecting device according to the present Invention described.
  • As in the 1 and 2 3, a rotational speed and a feed required for the execution of the drilling operation are transmitted from a drill (not shown) to a shaft 101 Transfer, which is connected herewith. The wave 101 is with a cylindrical center hole 102 which supplies cutting oil from the cutting machine via an oil passage (not shown).
  • A sealing element 103 is done with the help of a retaining ring 104 in the lower section of the center hole 102 kept in place. A valve body 105 for opening and closing the oil passages has a head portion 106 , a flange portion 107 which is on the side of the sealing element 103 formed and with oil-absorbing recesses 108 is provided, and a rod section 109 which is coaxial with the flange portion 107 runs downwards and fits loosely in the middle opening 103a of the sealing element 103 is included.
  • In non-operating condition, the flange portion 107 against the sealing element 103 by the pressure of a compression coil spring 110 pressed, which in the center hole 102 is provided, thereby preventing cutting oil from the central opening 102 can exit in the direction down. The valve body 105 , the sealing element 103 and the compression coil spring 110 Form a valve to open and close the oil channels.
  • During the drilling process, the center pin 138 the respective ring cutter or hole cutter 130A . 130B . 130C and 130D , which will be explained in more detail below, pressed against a workpiece and he is pushed upwards. The head section 139 , which is at the upper end of the center pin 138 is formed, comes to rest against the lower end of the rod section 109 of the valve body 105 and raise this. The flange section 107 is from the sealing element 103 against the pressure force of the helical compression spring 110 solved. As a result, cutting oil can pass through the oil channels 108 between the flange section 107 and the sealing element 103 formed spaces and between the inner peripheral surface of the central opening of the sealing element 103 and the outer peripheral surface of the rod portion 109 formed spaces flow and then reaches the edges of the cutting section 131 ,
  • holding openings 112 for receiving blocking elements for fixing the hole cutter 130A (balls 113 in the preferred embodiment, hereinafter referred to as "mounting balls 113 "are designated in the circumferential direction in the lower end portion 111 the wave 101 arranged. Each holding hole 112 can have one and the same inner diameter over the entire depth, but it is preferred that the inner wall of the holding opening 112 is tapered so that the inside inner diameter at the inner end of the opening 112 smaller than the outer-side inner diameter at the outer end thereof. This prevents the balls 113 into the center hole 102 the wave 101 fall.
  • A substantially hollow, cylindrical support member 114 is axially slidably fitting in the lower end portion of the central bore 102 arranged, and it is by the pressure force of a pressure coil spring 114 pressed down, which between the supporting part 114 itself and the retaining ring 104 is provided. In the outer peripheral wall of the lower end portion of the support member 114 is a ring-shaped neck 116 formed, which has a smaller outer diameter than the remaining part of the outer peripheral wall and for receiving the mounting balls or fixing balls 113 serves, which partially from the holding openings 112 towards the center hole 102 protrude. The depth of the annular neck 116 is in 5 denoted by E.
  • The outer peripheral surface 117 of the lower end portion 111 the wave 101 is reduced in diameter, and an annular Schneiderfixierhülse 118 is arranged appropriately on this. As in the 3 and 4 is shown, the sleeve has 118 a cylindrical, first control surface 119 on which of the inner peripheral surface of the sleeve 118 is formed, and has an inner diameter which is equal to the outer diameter of the lower portion of the shaft 101 is, and it has second control surfaces 120 which are formed by shallow deep, U-shaped depressions, which in the circumferential direction in the first control surface 119 are arranged. An annular return spring chamber 121 is in the end of the sleeve 118 formed, and this end is the lower end of the sleeve 118 when she's at the shaft 101 is appropriate. In this preferred embodiment, there are three, second control surfaces 120 in the circumferential direction at regular intervals in the first control surface 119 arranged. The number of second control surfaces is not limited to three. However, three are preferably suitable because the shank portion of the hole cutter is very stable with the aid of three, second control surfaces 120 is held. The second control surfaces 120 may be arranged at irregular intervals in the circumferential direction, but it is preferred that they are arranged at regular intervals so that they can absorb the same loads.
  • The first control surface 119 pushes the mounting balls 113 and causes parts of the mounting balls 113 from the holding openings 112 deep into the center hole 102 protrude. The sleeve 118 can be turned in the direction of an arrow A, as in 5 is shown. In a non-operating state, the sleeve takes 118 the state of rotation in the direction of arrow A thanks to a return spring 124 a, like this in 5 is shown. In this state, the mounting balls 113 in contact with the associated second control surfaces 120 and they are in the neck section 116 of the supporting part 114 added. Thus, they are in a ready position, as in 1 is shown.
  • With reference to the 1 and 2 is the return spring chamber 121 by means of an annular cover 151 covered, which at the lower end of the outer peripheral wall of the shaft 101 with the help of a retaining ring 152 is held.
  • As in the 1 to 3 and 6 is shown is a substantially C-shaped return spring 124 in the return spring chamber 121 accommodated. An end 125 the return spring 124 is stuck with the wave 101 connected, and the other end 126 this is fixed to the sleeve 118 connected. The sleeve 118 is always in the direction of arrow A in 5 subjected to a compressive force, so that the fixing or fixing balls 113 into the center hole 102 be pressed.
  • Now will be further preferred embodiments of hole cutters according to the invention.
  • The 8th and 9 show a first preferred embodiment of a hole cutter 130A according to the invention. This has a substantially hollow, cylindrical cutting section 131 which has an open, lower end and a cylindrical shaft portion 132A which is coaxially formed at the upper end. On the transverse side of the shaft portion or on the leg side of the shaft portion 132A are flat surfaces 133 trained, net are. A recessed ball receiving section 134A which of a hemispherical recess for receiving the associated mounting ball 113 is formed in every plane surface 133 educated. The recessed ball receiving section 134A is an example of a blocking element receiving portion for connecting a hole cutter to a shaft.
  • 10 is a cross-sectional view illustrating a second preferred embodiment of a hole cutter 130B in a state where this with the shaft 101 connected is. A cylindrical shaft section 132B is coaxial with the upper end of a cutting section 131 formed, which has substantially the same design as the cutting section 131 the first preferred embodiment of the hole cutter 130A Has. Furthermore, they are flat surfaces 133 on the transverse side of the shaft portion 132B in the same way as the flat surfaces 133 on the shaft section 132A in the first preferred embodiment of the hole cutter 130A educated. A ball receiving section 134B which has a conical shape in a horizontal cross section is in each flat surface 133 educated. The ball receiving section 134B also forms an example of a locking element receiving section.
  • The 11 and 12 show a third preferred embodiment of a hole cutter 130C according to the invention. The shaft section 132C has the same design as the shaft section 132A the first preferred embodiment of the hole cutter 130A (the shaft section 132A has hemispherical, recessed ball receiving sections 134A ) or the same design as the shaft section 132B the second preferred embodiment of the hole cutter 130B (the shaft section 132B has conical, recessed ball receiving sections 134B ). Another flat surface 153 is on the portion of the outer peripheral surface of the shaft portion 132C between the two flat surfaces 133 educated. The flat surface 153 is broken lines in the 1 and 2 entered. The further design is substantially the same as that of the first and second preferred embodiments of the hole cutter 130A and 130B match. The hole cutter 130C can with a shaft by means of a conventional hole cutter connecting device using the flat surface 153 be connected as a passage section.
  • 10 shows in a cross-sectional view, the third preferred embodiment of the hole cutter 130C according to the invention, which has conical, recessed ball receiving portions, wherein there is illustrated a state in which the hole cutter 130C with the wave 101 connected is. The hole cutter, the shaft portion and the conical recess ball receiving portions of the third preferred embodiment are with 130C . 132C and 134C each in 10 designated.
  • The 13 and 14 show a fourth preferred embodiment of a hole cutter 130D which has a cutting section 131 which has the same configuration as the cutting portion of the first preferred embodiment of the hole cutter 130A Has. A cylindrical guide section 135 is coaxial with the upper end of the shaft portion 132D formed, which at the upper end of the cutting portion 131 is provided. The guide section 135 has an outer diameter which is opposite to the outer diameter of the shaft portion 132D is reduced such that this section is not against the mounting balls 113 butts when the shank portion 132D into the center hole 102 the wave 101 is introduced. Hemispherical formed, recessed ball receiving sections 134D are in the circumferential direction in a stepped stepped portion 136 formed, which between the upper end of the shaft portion 132D and the lower end of the guide section 135 is formed. The recessed ball receiving section 134D illustrates an example of a blocking element receiving section.
  • In the preferred embodiments described above, the flat surfaces form 133 and the guide section 135 Barrier passage means, and the locking member passing means and the locking member receiving portions constitute the engagement portions.
  • The number, positions and dimensions of the flat surfaces 133 of the ring cutter 130A and 130B , and the guide sections 135 and the ball receiving sections 134A . 134B . 134C and 134D the hole cutter 130C and 130D correspond to the number, positions and dimensions of the mounting balls 18 when the shank portions of the hole cutter are completely in the center hole 102 the wave 101 are introduced ( 2 ). Thanks to this design, only the special hole cutter 132A . 132B . 132C and 132C with the wave 101 while other hole cutters can not be connected. Each of the shaft portions of the first to fourth preferred embodiments of the hole cutter has three ball receiving portions circumferentially spaced at regular intervals. However, the shank portion may have a polygonal cross section.
  • As in the 2 and 3 is shown, the center pin extends 138 for adjusting the position during drilling through the central opening of the hole cutter 130A so that it is axially movable therein. At the top of the center pin 138 is a head 139 formed, which has a larger outer diameter than the outer diameter of the center pin 138 so that it prevents the middle pen 138 from the middle opening 137 the hole cutter 130A can slip out. As indicated above, the tip lies at the lower end of the center pin 138 is formed, against a workpiece to be drilled, and the center pin 138 is raised here. The valve body 105 to open and close the oil passage is through the head 139 of the center pin 138 raised to allow cutting oil in the shaft 101 can flow down to the cutting edges, which at the cutting portion 131 the hole cutter 130A are formed. In each case in the second to fourth preferred embodiments of the hole cutter 130B . 130C and 130D a center pin is provided, which has the same layout as in the first preferred embodiment, in which the center pin with 138 is designated.
  • functionality
  • First The procedures for setting the hole cutter to the Waves described.
  • The shaft section 132A the hole cutter 130A gets into the center hole from below 102 the wave 101 introduced in which in the 1 and 5 shown state. If the shaft section 132A is introduced, the support part 114 through the shaft section 132A raised and comes from the mounting balls 113 free. The mounting balls 113 roll on the flat surfaces 133 and work with the ball receiving sections 134A together, which in the shaft portion 132A the power amplifier are provided during insertion. At the same time the sleeve is 118 in the direction indicated by the arrow A in 5 direction shown by the pressure force of the return spring 124 turned. As a result, the mounting balls come 113 in contact with the first control surface 119 and they are firmly in the ball receiving sections 134A pressed. Thus, the hole cutter 130A with the wave 101 connected in an operating handle, as shown in 2 is shown.
  • In the connection of the first preferred embodiment of the hole cutter 130A with the wave 101 reaches the upper end of the shaft portion 132A the area of the mounting balls 113 when the shaft section 132A into the center hole 102 the wave 101 is introduced. When the flat surfaces 133 of the shaft portion 132A axially to the mounting balls 113 aligned, the mounting balls work 113 with the ball receiving sections 134A only by the fact that the hole cutter 130A is pressed into the central opening. On the other hand, if the flat surfaces are not axial to the mounting balls 113 are aligned, abuts the upper end of the shaft portion 132A against the mounting balls 113 , and you can do the shaft section 132A stop introducing it. However, after the flat surfaces 133 to the mounting balls 113 have been aligned by the hole cutter 130A The hole cutter can be turned around its own axis 130A be further introduced, thereby allowing the mounting balls 113 with the ball receiving sections 134A can work together easily, so that the connection of hole cutter 130A with the wave 101 is completed.
  • The second and third preferred embodiments of the hole cutter 130B and 130C can with the shaft 101 in the same way as in the first preferred embodiment of the hole cutter 130A get connected. As has been described above, the third preferred embodiment of the hole cutter 130C be connected to the shaft by means of a conventional hole cutter connection device.
  • In an aligned state, the fourth preferred embodiment of the hole cutter is 130D completely in the middle opening 102 the wave 101 introduced, and the bullets 113 fit into the ball receiving sections 134D , causing the hole cutter 130D with the wave 101 connected is. However, in a misaligned state, the stepped section strikes 136 of the shaft portion 134D against the mounting balls 113 when the shaft section 134D into the center hole 102 the wave 101 is introduced. In this case, the tailor becomes 130D rotated around its own axis to the receiving sections 134D to the mounting balls 113 align. Subsequently, the shaft portion 134D further into the middle hole 102 the wave 101 inserted so that the mounting balls 113 with the ball receiving sections 134D work together. This is the hole cutter 130D with the wave 101 connected.
  • The three-point support, which one with the help of the balls 113 in the first to fourth preferred embodiments 130A . 130B . 130C and 130D ensures that there is an accurate transmission of the rotational movement and the rotational forces of the shaft 101 on the hole cutter 130A . 130B . 130C and 130D receives, and that prevents a mid-point displacement between the hole cutter and the shaft 101 occurs, resulting in inaccurate drilling operations. The shot of the balls 113 in the ball receiving portions of the shaft portion of the hole cutter according to the present invention allows the hole cutter can be moved slightly up and down repeatedly due to the cutting resistance or the like during the drilling operation, so that the cutting chips is cut into small pieces, the drilling efficiency can be improved and the life of the hole cutter can be extended.
  • As will be understood from the above description, only a hole cutter having barrier member passing means whose dimensions and arrangements are suitable for the hole cutter connecting apparatus which is used can be connected to a shaft, while an unsuitable hole cutter does not Wave can be connected. Even if long chip pieces are formed and these are around the sleeve 118 wrap, causing the sleeve 118 is lifted, the sleeve is 118 not rotated in the direction in which the hole cutter is released from the hole cutter connecting device. Thus, the hole cutter can not solve or he can not by the formation of the chip parts of the shaft 101 be separated.
  • The hole cutter can be removed from the shaft 101 in the manner described below.
  • The sleeve 118 the hole cutter 130A is manually in the opposite direction to the arrow A in 5 designated direction rotated, and the second control surfaces 120 are the attachment ku rules 113 facing. Then the hole cutter 130A by the pressure force of the compression coil spring 115 pushed down and it automatically slides off the shaft 101 from. Thus, the removal of the hole cutter can be 130A from the wave 101 also with a one-step operation, although it is necessary, the hole cutter 130A to keep it during its decline, to avoid having the hole cutter 130A falling. If the hole cutter 130A from the wave 101 is pushed out, the supporting part 114 by the pressure force of the compression coil spring 115 moved down, and finally are the mounting balls 113 with the help of the annular neck 116 held. In this way, the hole cutter connecting device is returned to the initial state, which in 1 is shown. The removal process can also be in the other preferred embodiments of the hole cutter 130B . 130C and 130D apply.

Claims (19)

  1. Hole cutter ( 130A . 130B . 130C ), in a wave ( 101 ) with a cylindrical central bore formed therein ( 102 ) leading to one end of the wave ( 101 ) is releasably held, wherein the hole cutter comprises: a substantially cylindrical shaft portion ( 132A . 132B . 132C ) with an upper end for insertion into the cylindrical central bore ( 102 ) from one end of the shaft ( 101 ), wherein the shaft portion ( 132A . 132B . 132C ) has a diameter substantially equal to that of the central cylindrical bore ( 102 ) and comprising: blocking element passage means ( 133 ), which on a circumference of the shaft portion ( 132A . 132B . 132C ) are formed, and entry areas at the upper end of the shaft portion ( 132A . 132B . 132C ) at the same angular intervals as the blocking elements ( 113 ) in the wave ( 101 ) are provided, wherein the blocking elements ( 113 ) between a first depth position in which the blocking elements ( 113 ) partially in the cylindrical central bore ( 102 ) are positioned, and a second depth position can be positioned, in which they deeper into the cylindrical central bore ( 102 protrude than at the first depth position, wherein the blocking element passage means ( 133 ) so deep from the periphery of the cylindrical central bore ( 102 ) are cut out, as one between the first and second depth position of the locking elements ( 113 ) to the entrance areas when they reach the barrier elements (FIG. 113 ) are angularly aligned to allow the locking elements ( 113 ), which are held in the first depth position, are free when the shank portion ( 132A . 132B . 132C ) in the cylindrical central bore ( 102 ) continues to slide forward; a shank portion abutment surface to a support member ( 114 ), which in the cylindrical central bore ( 102 ) is arranged and biased towards one end of the shaft, wherein the supporting part ( 114 ) the blocking elements ( 113 ) in the first depth position while continuing into the cylindrical central bore ( 102 ) are pressed to the second depth position, wherein the shaft portion abutment surface on the shaft portion ( 132A . 132B . 132C ) is arranged so that, after the entry regions of the barrier element passage devices ( 133 . 135 ) held in the first depth position locking elements ( 113 ), the supporting part ( 114 ) to thereby move the blocking elements ( 113 ) from the supporting part ( 114 ) so that they are in biased contact with the barrier element passage means (FIGS. 133 ), the blocking elements ( 113 ) so that they move along them, while the shank portion ( 132A . 132B . 132C ) in the cylindrical central bore ( 102 ) slides forward; and recessed locking element receiving sections ( 134A . 134B . 134C ), which on the circumference of the shaft portion ( 132A . 132B . 132C ) are arranged in the angular intervals and in each case so deep from the periphery of the central bore ( 102 ) are omitted, as the second depth position of the locking elements ( 113 ), wherein the blocking element passage means ( 133 ) at the locking element receiving portions ( 134A . 134B . 134C ) and wherein, while the shank portion ( 132A . 132B . 132C ) in the cylindrical central bore ( 102 ) slides forward, the blocking element passing means ( 133 ), the blocking elements ( 113 ) along the blocking element receiving sections ( 134A . 134B . 134C ) into which the blocking elements ( 113 ) and in which they are recorded.
  2. Hole cutter ( 130A . 130B . 130C ) according to claim 1, characterized in that the blocking element passage means ( 133 ) flat surfaces ( 133 ) exhibit.
  3. Hole cutter ( 130A . 130B . 130C ) according to claim 1 or 2, characterized in that the blocking element receiving sections ( 134A . 134B . 134C ) are formed hemispherical.
  4. Hole cutter ( 130A . 130B . 130C ) according to claim 1 or 2, characterized in that the blocking element receiving sections ( 134A . 134B . 134C ) are conical.
  5. Hole cutter ( 130A . 130B . 130C ) according to at least one of the preceding claims, characterized in that the blocking element receiving sections ( 134A . 134B . 134C ) on the circumference of the shaft ( 132A . 132B . 132C ) are arranged so that they at least partially with the Blocking element passage devices ( 133 ) overlap.
  6. Hole cutter ( 130A . 130B . 130C ) according to at least one of the preceding claims, characterized in that the blocking element passage means ( 133 ) each have an axially extending passage.
  7. Hole cutter ( 130A . 130B . 130C ) according to at least one of the preceding claims, characterized in that the blocking element passage means ( 133 ) each at a blocking element receiving portion ( 134A . 134B . 134C ) end up.
  8. Hole cutter ( 130A . 130B . 130C ) according to at least one of the preceding claims, characterized in that the upper surface of the shaft portion ( 132A . 132B . 132C ) is the shank portion abutment surface.
  9. Combination of a hole cutter connecting device and a hole cutter, the hole cutter connecting device comprising: a shaft (FIG. 101 ) with a cylindrical end portion ( 111 ) having an outer diameter, a cylindrical central bore ( 102 ) and several holding openings ( 112 ) extending radially through the end portion (FIG. 111 ) and in the circumferential direction in the end portion ( 111 ) are arranged; - blocking elements ( 113 ), which are in the holding openings ( 112 ) and are radially movable therein to a hole cutter ( 130A . 130B . 130C ) with the wave ( 101 ) connect to; - a sleeve ( 118 ), the end section ( 111 ) the wave ( 101 ) and comprising: a) a first control surface ( 119 ), with an inner diameter equal to the outer diameter of the end portion ( 111 ) the wave ( 101 ), so that the blocking elements ( 113 ) from the holding openings ( 112 ) by a first predetermined length in the center hole ( 102 ) protrude when the locking elements ( 113 ) at the first control surface ( 119 ) issue; and b) second control surfaces ( 120 ) related to the first control surface ( 119 ) are arranged radially further out and are provided, the locking elements ( 113 ) so that they leave the center hole ( 102 ) can withdraw such that the blocking elements ( 113 ) by a second predetermined length, which is smaller than the first predetermined length, from the holding openings ( 112 ) in the center hole ( 102 ) the wave ( 101 protrude), - wherein the sleeve ( 118 ) is rotatable about its axis between a first and a second position, so that the blocking elements ( 113 ) at the first control surface ( 119 ) abut when the sleeve ( 118 ) is in the first position, and the blocking elements ( 113 ) on the second control surfaces ( 120 ) when the sleeve ( 118 ) is in the second position, - wherein a hole cutter ( 130A . 130B . 130C ) with the wave ( 101 ) is connected by an outer peripheral surface having a shaft portion ( 132A . 132B . 132C ) of the hole cutter in the center hole ( 102 ) the wave ( 101 ) is used, wherein the blocking elements ( 113 ) with recessed locking element receiving sections ( 134A . 134B . 134C ) which are arranged in a circle in the outer circumferential surface, - a spring ( 124 ), which the sleeve ( 118 ) pushes in the first position; - wherein the sleeve ( 118 ) by means of the spring ( 124 ) is moved to the first position when the blocking elements ( 113 ) in the recessed locking member receiving portions ( 134A . 134B . 134C ), the corresponding blocking elements ( 113 ) at the first control surfaces ( 119 ) and in the blocking element receiving sections ( 134A . 134B . 134C ) are held so that the shank portion ( 132A . 132B . 132C ) in the central bore ( 102 ) can not rotate and move axially, - wherein the second control surfaces ( 120 ) in the first control surface ( 119 ) are formed and arranged circumferentially spaced; - blocking element passage devices ( 133 ), which in an outer peripheral surface of the shaft portion ( 132A . 132B . 132C ) are formed so that the shaft portion in the central bore ( 102 ) can be used, in which the blocking element passage means on the locking elements ( 113 ) passing by the second control surfaces ( 120 ) and in the center hole ( 102 ) project; - a carrying part ( 114 ) in the center hole ( 102 ) the wave ( 101 ) is axially movable and at one end of an annular neck ( 116 ) for receiving the blocking elements ( 113 ) when at the second control surface ( 120 ) and in the center hole ( 102 ) protrude when the shank portion ( 132A . 132B . 132C ) of the ring cutter ( 130A . 130B . 130C ) not in the center hole ( 102 ) is used; - spring elements ( 115 ) in the center hole ( 102 ) are arranged to the supporting part ( 114 ) in a position in which the annular neck ( 116 ) the blocking elements ( 113 ) receives; the hole cutter comprising: - a substantially cylindrical cutting portion ( 131 ) at its one end, - a shank portion having a lateral side and two ends ( 132A . 132B . 132C ) coaxially at one of the two ends with the one end of the cutting portion ( 131 ) connected is; - blocking element passage devices ( 133 ), which on the lateral side of the shaft portion ( 132A . 132B . 132C ) are formed, and - recessed locking element receiving portions ( 134A . 134B . 134C ), in the blocking element passage facilities ( 133 ) are formed; - wherein the blocking element passage means ( 133 ) on and around the circumference on the side of the shank portion ( 132A . 132B . 132C ) are formed, and wherein the recessed locking element receiving portions ( 134A . 134B . 134C ) in or on the blocking element passage devices ( 133 ) are formed in the circumferential direction thereto.
  10. Combination according to claim 9, characterized in that the spring ( 124 ) between the shaft ( 101 ) and the sleeve ( 118 ) is provided to the sleeve ( 118 ) in a position in which the locking elements ( 113 ) at the first control surface ( 119 ) issue.
  11. Combination according to claim 9, characterized in that the spring is a C-shaped spring ( 124 ) with two ends, one end of which ( 126 ) on the shaft ( 101 ) and the other end ( 125 ) on the sleeve ( 118 ) is attached.
  12. Combination according to at least one of claims 9 to 11, characterized in that each of the retaining openings ( 112 ) is conical, wherein an inner inner diameter is smaller than an outer side inner diameter.
  13. Combination according to at least one of claims 9 to 12, characterized in that the retaining openings ( 112 ) in a number of three and in the circumferential direction at regular intervals in the one end of the shaft ( 101 ) are arranged.
  14. Combination according to claim 9, characterized in that a further flat surface ( 153 ) on the part of the outer peripheral surface of the shaft portion (FIG. 132C ) between two adjacent flat surfaces ( 113 ) is formed around the hole cutter ( 130C ) with a fastening bolt on the shaft ( 101 ) to fix.
  15. Combination according to at least one of claims 9 to 14, characterized in that the recessed locking element receiving sections ( 134A . 134B . 134C ) are formed hemispherical.
  16. Combination according to at least one of claims 9 to 15, characterized in that the first and second control surfaces ( 119 . 120 ) in the circumferential direction arcuate and coaxial with the central bore ( 102 ) are formed.
  17. Combination according to at least one of claims 9 to 16, characterized in that the blocking element passage means ( 133 ) flat surfaces ( 133 ), which on the side of the shaft portion ( 132A . 132B . 132C ) and circumferentially spaced, and that the recessed locking member receiving portions ( 134A . 134B . 134C ) in or on the flat surfaces ( 133 ) are formed.
  18. Combination according to at least one of claims 9 to 17, characterized in that the recessed locking element receiving sections ( 134B ) are conical.
  19. Combination according to at least one of claims 9 to 18, characterized in that a further plane section ( 153 ) for fixing a conventional hole cutter connecting device to the outer peripheral surface of the shaft portion (FIG. 132D ) between two adjacent planar sections ( 133 ) is provided.
DE4448024.5A 1993-06-30 1994-06-27 Hole cutter connecting device and hole cutter Expired - Lifetime DE4448024C5 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP5183522A JP2558053B2 (en) 1993-06-30 1993-06-30 Ring cutter attachment / detachment device
JP5183523A JP2558054B2 (en) 1993-06-30 1993-06-30 Annular cutter
JP5-183523 1993-06-30
JP5-183522 1993-06-30
DE4422342A DE4422342C2 (en) 1993-06-30 1994-06-27 Hole cutter and combination of a hole cutter connection device and a hole cutter

Publications (2)

Publication Number Publication Date
DE4448024B4 true DE4448024B4 (en) 2008-07-03
DE4448024C5 DE4448024C5 (en) 2015-01-08

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Application Number Title Priority Date Filing Date
DE4448024.5A Expired - Lifetime DE4448024C5 (en) 1993-06-30 1994-06-27 Hole cutter connecting device and hole cutter

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DE (1) DE4448024C5 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747946A (en) * 1970-12-21 1973-07-24 R Edens Tool holders
DE2822553A1 (en) * 1977-05-23 1978-12-07 Boeing Co Motor-fast chuck for tools with cylindrical span approach
JPS6274515A (en) * 1985-09-26 1987-04-06 Miyanaga:Kk Chip fracture type drilling device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747946A (en) * 1970-12-21 1973-07-24 R Edens Tool holders
DE2822553A1 (en) * 1977-05-23 1978-12-07 Boeing Co Motor-fast chuck for tools with cylindrical span approach
JPS6274515A (en) * 1985-09-26 1987-04-06 Miyanaga:Kk Chip fracture type drilling device

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