CA1081503A - Chip remover for drilled and/or tapped holes - Google Patents
Chip remover for drilled and/or tapped holesInfo
- Publication number
- CA1081503A CA1081503A CA302,346A CA302346A CA1081503A CA 1081503 A CA1081503 A CA 1081503A CA 302346 A CA302346 A CA 302346A CA 1081503 A CA1081503 A CA 1081503A
- Authority
- CA
- Canada
- Prior art keywords
- duct
- toolholder
- spindle
- coupled
- machine tool
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
- B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
- B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
- B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Drilling Tools (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
- Drilling And Boring (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A compressed air conduit is mounted adjacent to a machine tool spindle and is coupled to a duct in a toolholder when the toolholder is clamped in a toolholder socket on the end of the spindle. The toolholder has a hollow probe projecting axially therefrom which is coupled at one end to the toolholder duct and has a nozzle at its other end. The probe is inserted into a hole in a workpiece by the machine tool positioning mechan-ism. Compressed air is then forced through the duct in the toolholder and out the nozzle to blow chips and coolant out of the hole.
A compressed air conduit is mounted adjacent to a machine tool spindle and is coupled to a duct in a toolholder when the toolholder is clamped in a toolholder socket on the end of the spindle. The toolholder has a hollow probe projecting axially therefrom which is coupled at one end to the toolholder duct and has a nozzle at its other end. The probe is inserted into a hole in a workpiece by the machine tool positioning mechan-ism. Compressed air is then forced through the duct in the toolholder and out the nozzle to blow chips and coolant out of the hole.
Description
l~8::~Lsa;~ !
BACXGROUND OF THE INVENTION
This invention relates to machine tools of the type used to drill and/or tap holes in a workpiece. In such machine tools there is a problem of removing chips from the bottom of the holes, particularly after the holes are tapped, and this invention is addressed to that problem.
In the past, machine tools of the above-noted type have been manufactured in which coolant is introduced through the tool via an axial duct in the spindle which mates with an axial duct in the toolholder or via a rotary gland on the toolholder. This in-vention is particularly adapted for use in combination with such coolant-through-the-tool machine tools and uses the existing cool-ant ducts for the additional function of blowing chips and coolant out of holes drilled and/or tapped in a workpiece.
SUMMARY OF THE INVENTION
A conduit for compressed gas is mounted adjacent to a machine tool spindle and is coupled to a duct in a toolholder when the tool-holder is clamped in a toolholder socket on the end of the spindle.
A hollow probe projects axially from the toolholder and is coupled to the toolholder duct. The outer end of the probe has a nozzle Lhereon. Means is provided for forcing a compressed gas through the duct in the toolholder and out the nozzle to blow chips and coolant out of a hole in a workpiece adjacent to the nozzle.
DESCRIPTION OF THE DRAWINGS
Figure 1 is an axial sectional view of one preferred embodi-men~ of the invention in combination with a coolant-through-the-tool-type of machine tool;
Fig. 2 is an axial sectional view of one toolholder having a hollow probe for blowing chips and coolant out of holes in a workpiece;
.
; - 2 -- ~.;
10815~)3 Fig. 3 is a fragmentary perspective view, partially cut away, showing the probe of Fig. 2 being used to blow chips and coolant out of a hole in a workpiece;
Fig. 4 is a plan view, partially cut away, of a second pre-ferred embodiment of the invention in combination with a secondcoolant-through-the-tool-type of machine tool;
Fig. 5 is a cross-sectional view taken on the line 5-5 of Fig. 41 Fig. 6 is a cross-sectional view taken on the line 6-6 of Fig. 4; and Fig. 7 is a side elevational view taken on the line 7-7 of Fig. 4.
DESCRIPTION OF THE PREFERRED EMBQDIMENTS
Figure l is an axial sectional view of the spindle l0 of a horizontal machining center. Spindle l0 is journalled within a spindle head 12 by bearings 14, 16 and 18 and is rotated by motor means tnot shown) through a drive gear 20 which is rigidly attach-ed to spindle l0. Spindle head 12, which is represented by frag-ments in Fig. l, is conventional in every respect, as are the re-maining portions of the machining center which are not shown in Fig. l. The outer portions of spindle l0 are conventional in structure but the inner portions have been modified for the pur-poses of this invention.
The inner portion of spindle l0 has an axial bore 22 which extends the full length of spindle l0 and opens at one end into a toolholder socket 24 which is shaped to receive conventional toolholders. A toolholder 26 which has been modified for the purposes of this invention is shown mounted in toolholder socket 24 and clamped therein by a draw in clamp 28 which engages a re-tention knob 30 on the inner end of toolholder 26. The forward portion of toolholder 26 is disclosed in Fig. 2 and will be de-scribed after the inner portion of spindle l0 is described.
` 101~15~3 A cylindrical drawbolt 32 is axially slidably mounted within spindle bore 22 for movement between a retracted position, shown in Fig. 1, and an extended position, in which drawbolt 32 is moved to the left in Fig. 1. Drawbolt 32 is spring biased to its re-tracted position by a stack of selleville springs (not shown) which urge drawbolt 32 to the right in Fig. 1. A hydraulic cylinder (not shown)is provided for moving drawbolt 32 to its extended position (to the left in Fig. 1) against the ~orce of the Belleville springs by bumping against an adjustable sleeve 34 on the inner end of drawbolt 32. Sleeve 34 can be adjusted and locked in place by a setscrew 36 to regulate the extended position of drawbolt 32.
Clamp 28 is attached to the outer end of drawbolt 32.
Clamp 28 includes a slotted sleeve 38 which has internal screw threads 40 on one end (to the right in Fig. 1) and jaw elements 42 on the other end. Slotted sleeve 38 is made of spring materi-al and jaw elements 42 are spring biased thereby outwardly but are moved inwardly when drawbolt 32 is moved to its retracted position by interaction with a collar 44. The inner surface of collar 44 and the outer surface o~ jaw elements 42 are shaped to cam jaw elements 42 together when drawbolt 32 is moved to its retracted position, shown in Fig. 1, thereby clamping jaw ele-ments 42 onto retention knob 30. When drawbolt 32 i5 moved to its extended position (to the left in Fig. 1) the cam surfaces allow jaw elements 42 to open due to spring tension and release reten-tion knob 30.
Drawbolt 32 has a central axial duct 46 extending there-through and has an insertion tube 48 on the outer end thereof which is coupled on one end to duct 46 and is positioned to be ; inserted on the other end into an opening 50 in the retention , 30 knob 30 of toolholder 26. Insertion tube 48 is clamped to the `- outer end of drawbolt 32 by a threaded sleeve 52 which is attached ~, . .. .
~0~5(~3 to the outer end of drawbolt 32 by screw threads 54. An 0-ring 56 on the inner end of insertion tube 48 seals the inner end of tube 48 and also provides a small amount of play to compensate ~or small mismatches in the position Of insertion tube 48 and the opening 50 in retention knob 30.
On the other end of drawbolt 32, a conventional rotary union 58 having two inlet conduits 60 and 62, one for compressed air and the other for coolant, is coupled to drawbolt 32 and to duct 46 therein. Conduit 62 is coupled to a source of coolant fluid (not shown) and to a conventional coolant-through-the-tool solenoid valve 63. The coolant pump and distribution system is convention-al in structure and function and hence is omitted from the draw-ings. Conduit 60 is coupled to a compressed air tank 64 through a conventional solenoid valve 66 When solenoid valve 66 is open-ed, compressed air is admitted through conduit 60 and rotary union 58 into duct 46 and from duct 46 through insertion tube 48 into the opening 50 in retention knob 30. This compressed air is used to blow chips and coolant out of holes in a workpiece through a modified toolholder shown in Figs. 2 and 3.
Referring to Fig. 2, toolholder 26 has an axial duct 68 which opens into opening 50 in retention knob 30 and extends through toolholder 26. A hollow, elongated cylindrical probe 70 is mounted in the front end of duct 68 and is held therein by a setscrew 72. Probe 70 has a slender front portion 74 which is ; 25 dimensioned to fit within the holes which are to be cleaned and has a nozzle 75 on its outer end. Fig. 3 shows the front portion 74 of probe 70 inserted into a hole 76 in a workpiece 78 with nozzle 75 being near the bottom o~ hole 76. With the probe 70 r . in this position, compressed air is forced through probe 70 by the means described above to blow chips and coolant out of hole 76. When the compressed air is initially applied to rotary union ....
~8~S~3 58, there may be some coolant in duct 46 from a preceding coolant-through-the-tool operation, and this will be blown out of duct 46 and then out of hole 76 by the compressed air. Within a short space of time, the compressed air will blow both ~oolant and chips out o~ hole 76.
The modified toolholder 26 of this invention has a standard outer configuration including an automatic toolchanger flange 80 and can be handled by a conventional automatic tool changer.
Other tools used in combination with modified toolholder 26 have an opening 50 in their retention knob 30 to accommodate the end of insertion tube 48. Positioning of probe front portion 74 into the hole to be cleaned out is accomplished by the conventional positioning controls for the machining center. This may be done by moving spindle head 12 with respect to workpiece 78, or by mov-ing workpiece 78 with respect to spindle head 12, or by a combina~
tion of both.
Figs. 4 through 7 show a second preferred embodiment for use in combination with a coolant-through-the-tool-type of machine tool in which the coolant is introduced through a rotary gland in the toolholder rather than through an axial duct in the spindle.
Re~erring to Fig. 4, the toolholder 82 ~or this embodiment is substantially cylindrical in shape and is shown clamped into a spindle 84 which is rotatably mounted by conventional means not shown in a spindle head 86. A spindle ring 88 is rigidly attached 2S to spindle head 86 by bolts 90 (Fig. 5). Spindle ring 88 surrounds spi~dle 84 and serves as a support for the coolant conduit and sock-et as described in later paragraphs. The portions of the machine tool which support spindle 84 and spindle head 86 are conventional ; in structure and hence are not shown in the drawings.
A coolant and air supply block 92 having a coolant and air - socket 94 therein is bolted to spindle ring 88 adjacent to spindle ~81S03 84. A coolant and air supply conduit 96 is attached to supply block 92 and is coupled to socket 94 by duct 98 (Fig. 7). Coolant is supplied to conduit 96 from a conventional coolant supply (not shown) which contains valves (not shown) for also routing compress-ed air to conduit 96 which also serves as a compressed air conduit ~or the purposes of this invention. The coolant is introduced into conduit 96 when a conventional coolant-through~the-tool toolholder is used and the compressed air is introduced into conduit 96 when a modified coolant-throught-the tool toolholder 82 (shown in Figs.
4-7) is used to blow chips and coolant out of a drilled and tapped hole.
Toolholder 82 is modified by means of a rotary gland 100 which couples a fluid (either coolant or compressed air) to the toolholder while it is rotating. Rotary gland 100 is seated in a substantially rectangular gland block 102 which has a bore 104 therein (Fig. 4) for receiving toolholder 82. A pair of bushings 106 and 108 rotatably support toolholder 82 within bore 104. Bush-ings 106 and 108 are spaced apart axially to form a gap 110 into which coolant or compressed air is forced. 0-rings 112 and 114 on the interior surface of bushings 106 and 108 seal in the coolant or compressed air at the rotary junction between bushings 106 and 108 and toolholder 82. Bushing 108 is held in place by a flange 116 on toolholder 82 and bushings 106 is held in place by a snap ring 118.
A radial opening 120 in toolholder 82 communicates between annular gap 110 and an axial duct 122 in toolholder 82. Axial duct 122 is coupled to a radial duct 124 which in turn is coupled to a central axial duct 126 in a probe 128 which is removably held in toolholder 82 by a setscrew 130. Probe 128 has a slender elongated outer end 132 which terminates in a nozzle 134. In the operation of this embodiment, compressed air is forced from gap 110 through . .
S()3 opening 120 and through ducts 122, 124, and 126 out nozzle 134 to blow chips and coolant out of a drilled and/or tapped hole into which probe end 132 is inserted. However, with a coolant-through-the-tool type of tool inserted into toolholder 82 in place of probe 128, coolant can be conducted from gap 110 through opening 120 and ducts 122, 124 to the coolant-through-the-tool tool.
The connection between coolant socket 94 and gap 110 is effected by a coupling tube 136 which is mounted in a block 138 attached to gland block 102 and is coupled to gap 110 through a duct 140 in block 102. Coupling tube 136 has an 0-ring 142 which interacts with bushing 144 to seal the connection between socket 94 and coupling tube 136. Either coolant or compressed air can be conducted from socket 94 to gap 110 via tube 136 and duct 140.
To effect correct alignment between coupling tube 136 and socket 94, an alignment pinl46 is moved into and out of a no~h 147 (Fig. 6) in an adjacent flange 148 of toolholder 82 to lock toolholder 82 in a predetermined angular position with respect to gland block 102 when it is stored in the tool magazine (not shown) or is being moved between the tool magazine and spindle 84. Alignment pin 146 is attached to plunger 150 which is slideable in an axial bore 152 in block 138 and is normally spring biased inwardly by a compression spring 154. An abutment 156 opposite the inner end of plunger 150 bears thereagainst to move alignment pin 146 away from flange 148 when toolholder 82 is mounted in spindle 84. When toolholder 82 is removed from spindle 84, spring 154 forces plunger 150 inwardly and causes alignment pin 146 to engage notch 147 in flange 1480 An annular splash shield 158 is attached to the front of gland block 102 around toolholder 82 to limit the splashing of chips and coolant regardless of whether coolant or compressed air ` 30 is being applied to toolholder 82.
~08~S03 Although the illustrative embodiments of the invention have been described in considerable detail for the purpose of fully disclosing a practical operative structure incorporating the invention, it is to be understood that the particular apparatus shown and described is intended to be illustrative only and that the various novel features of the invention may be incorporated in oth~r structural forms without departing from the spirit and scope of the invention as defined in the subjoined claims.
_ g _
BACXGROUND OF THE INVENTION
This invention relates to machine tools of the type used to drill and/or tap holes in a workpiece. In such machine tools there is a problem of removing chips from the bottom of the holes, particularly after the holes are tapped, and this invention is addressed to that problem.
In the past, machine tools of the above-noted type have been manufactured in which coolant is introduced through the tool via an axial duct in the spindle which mates with an axial duct in the toolholder or via a rotary gland on the toolholder. This in-vention is particularly adapted for use in combination with such coolant-through-the-tool machine tools and uses the existing cool-ant ducts for the additional function of blowing chips and coolant out of holes drilled and/or tapped in a workpiece.
SUMMARY OF THE INVENTION
A conduit for compressed gas is mounted adjacent to a machine tool spindle and is coupled to a duct in a toolholder when the tool-holder is clamped in a toolholder socket on the end of the spindle.
A hollow probe projects axially from the toolholder and is coupled to the toolholder duct. The outer end of the probe has a nozzle Lhereon. Means is provided for forcing a compressed gas through the duct in the toolholder and out the nozzle to blow chips and coolant out of a hole in a workpiece adjacent to the nozzle.
DESCRIPTION OF THE DRAWINGS
Figure 1 is an axial sectional view of one preferred embodi-men~ of the invention in combination with a coolant-through-the-tool-type of machine tool;
Fig. 2 is an axial sectional view of one toolholder having a hollow probe for blowing chips and coolant out of holes in a workpiece;
.
; - 2 -- ~.;
10815~)3 Fig. 3 is a fragmentary perspective view, partially cut away, showing the probe of Fig. 2 being used to blow chips and coolant out of a hole in a workpiece;
Fig. 4 is a plan view, partially cut away, of a second pre-ferred embodiment of the invention in combination with a secondcoolant-through-the-tool-type of machine tool;
Fig. 5 is a cross-sectional view taken on the line 5-5 of Fig. 41 Fig. 6 is a cross-sectional view taken on the line 6-6 of Fig. 4; and Fig. 7 is a side elevational view taken on the line 7-7 of Fig. 4.
DESCRIPTION OF THE PREFERRED EMBQDIMENTS
Figure l is an axial sectional view of the spindle l0 of a horizontal machining center. Spindle l0 is journalled within a spindle head 12 by bearings 14, 16 and 18 and is rotated by motor means tnot shown) through a drive gear 20 which is rigidly attach-ed to spindle l0. Spindle head 12, which is represented by frag-ments in Fig. l, is conventional in every respect, as are the re-maining portions of the machining center which are not shown in Fig. l. The outer portions of spindle l0 are conventional in structure but the inner portions have been modified for the pur-poses of this invention.
The inner portion of spindle l0 has an axial bore 22 which extends the full length of spindle l0 and opens at one end into a toolholder socket 24 which is shaped to receive conventional toolholders. A toolholder 26 which has been modified for the purposes of this invention is shown mounted in toolholder socket 24 and clamped therein by a draw in clamp 28 which engages a re-tention knob 30 on the inner end of toolholder 26. The forward portion of toolholder 26 is disclosed in Fig. 2 and will be de-scribed after the inner portion of spindle l0 is described.
` 101~15~3 A cylindrical drawbolt 32 is axially slidably mounted within spindle bore 22 for movement between a retracted position, shown in Fig. 1, and an extended position, in which drawbolt 32 is moved to the left in Fig. 1. Drawbolt 32 is spring biased to its re-tracted position by a stack of selleville springs (not shown) which urge drawbolt 32 to the right in Fig. 1. A hydraulic cylinder (not shown)is provided for moving drawbolt 32 to its extended position (to the left in Fig. 1) against the ~orce of the Belleville springs by bumping against an adjustable sleeve 34 on the inner end of drawbolt 32. Sleeve 34 can be adjusted and locked in place by a setscrew 36 to regulate the extended position of drawbolt 32.
Clamp 28 is attached to the outer end of drawbolt 32.
Clamp 28 includes a slotted sleeve 38 which has internal screw threads 40 on one end (to the right in Fig. 1) and jaw elements 42 on the other end. Slotted sleeve 38 is made of spring materi-al and jaw elements 42 are spring biased thereby outwardly but are moved inwardly when drawbolt 32 is moved to its retracted position by interaction with a collar 44. The inner surface of collar 44 and the outer surface o~ jaw elements 42 are shaped to cam jaw elements 42 together when drawbolt 32 is moved to its retracted position, shown in Fig. 1, thereby clamping jaw ele-ments 42 onto retention knob 30. When drawbolt 32 i5 moved to its extended position (to the left in Fig. 1) the cam surfaces allow jaw elements 42 to open due to spring tension and release reten-tion knob 30.
Drawbolt 32 has a central axial duct 46 extending there-through and has an insertion tube 48 on the outer end thereof which is coupled on one end to duct 46 and is positioned to be ; inserted on the other end into an opening 50 in the retention , 30 knob 30 of toolholder 26. Insertion tube 48 is clamped to the `- outer end of drawbolt 32 by a threaded sleeve 52 which is attached ~, . .. .
~0~5(~3 to the outer end of drawbolt 32 by screw threads 54. An 0-ring 56 on the inner end of insertion tube 48 seals the inner end of tube 48 and also provides a small amount of play to compensate ~or small mismatches in the position Of insertion tube 48 and the opening 50 in retention knob 30.
On the other end of drawbolt 32, a conventional rotary union 58 having two inlet conduits 60 and 62, one for compressed air and the other for coolant, is coupled to drawbolt 32 and to duct 46 therein. Conduit 62 is coupled to a source of coolant fluid (not shown) and to a conventional coolant-through-the-tool solenoid valve 63. The coolant pump and distribution system is convention-al in structure and function and hence is omitted from the draw-ings. Conduit 60 is coupled to a compressed air tank 64 through a conventional solenoid valve 66 When solenoid valve 66 is open-ed, compressed air is admitted through conduit 60 and rotary union 58 into duct 46 and from duct 46 through insertion tube 48 into the opening 50 in retention knob 30. This compressed air is used to blow chips and coolant out of holes in a workpiece through a modified toolholder shown in Figs. 2 and 3.
Referring to Fig. 2, toolholder 26 has an axial duct 68 which opens into opening 50 in retention knob 30 and extends through toolholder 26. A hollow, elongated cylindrical probe 70 is mounted in the front end of duct 68 and is held therein by a setscrew 72. Probe 70 has a slender front portion 74 which is ; 25 dimensioned to fit within the holes which are to be cleaned and has a nozzle 75 on its outer end. Fig. 3 shows the front portion 74 of probe 70 inserted into a hole 76 in a workpiece 78 with nozzle 75 being near the bottom o~ hole 76. With the probe 70 r . in this position, compressed air is forced through probe 70 by the means described above to blow chips and coolant out of hole 76. When the compressed air is initially applied to rotary union ....
~8~S~3 58, there may be some coolant in duct 46 from a preceding coolant-through-the-tool operation, and this will be blown out of duct 46 and then out of hole 76 by the compressed air. Within a short space of time, the compressed air will blow both ~oolant and chips out o~ hole 76.
The modified toolholder 26 of this invention has a standard outer configuration including an automatic toolchanger flange 80 and can be handled by a conventional automatic tool changer.
Other tools used in combination with modified toolholder 26 have an opening 50 in their retention knob 30 to accommodate the end of insertion tube 48. Positioning of probe front portion 74 into the hole to be cleaned out is accomplished by the conventional positioning controls for the machining center. This may be done by moving spindle head 12 with respect to workpiece 78, or by mov-ing workpiece 78 with respect to spindle head 12, or by a combina~
tion of both.
Figs. 4 through 7 show a second preferred embodiment for use in combination with a coolant-through-the-tool-type of machine tool in which the coolant is introduced through a rotary gland in the toolholder rather than through an axial duct in the spindle.
Re~erring to Fig. 4, the toolholder 82 ~or this embodiment is substantially cylindrical in shape and is shown clamped into a spindle 84 which is rotatably mounted by conventional means not shown in a spindle head 86. A spindle ring 88 is rigidly attached 2S to spindle head 86 by bolts 90 (Fig. 5). Spindle ring 88 surrounds spi~dle 84 and serves as a support for the coolant conduit and sock-et as described in later paragraphs. The portions of the machine tool which support spindle 84 and spindle head 86 are conventional ; in structure and hence are not shown in the drawings.
A coolant and air supply block 92 having a coolant and air - socket 94 therein is bolted to spindle ring 88 adjacent to spindle ~81S03 84. A coolant and air supply conduit 96 is attached to supply block 92 and is coupled to socket 94 by duct 98 (Fig. 7). Coolant is supplied to conduit 96 from a conventional coolant supply (not shown) which contains valves (not shown) for also routing compress-ed air to conduit 96 which also serves as a compressed air conduit ~or the purposes of this invention. The coolant is introduced into conduit 96 when a conventional coolant-through~the-tool toolholder is used and the compressed air is introduced into conduit 96 when a modified coolant-throught-the tool toolholder 82 (shown in Figs.
4-7) is used to blow chips and coolant out of a drilled and tapped hole.
Toolholder 82 is modified by means of a rotary gland 100 which couples a fluid (either coolant or compressed air) to the toolholder while it is rotating. Rotary gland 100 is seated in a substantially rectangular gland block 102 which has a bore 104 therein (Fig. 4) for receiving toolholder 82. A pair of bushings 106 and 108 rotatably support toolholder 82 within bore 104. Bush-ings 106 and 108 are spaced apart axially to form a gap 110 into which coolant or compressed air is forced. 0-rings 112 and 114 on the interior surface of bushings 106 and 108 seal in the coolant or compressed air at the rotary junction between bushings 106 and 108 and toolholder 82. Bushing 108 is held in place by a flange 116 on toolholder 82 and bushings 106 is held in place by a snap ring 118.
A radial opening 120 in toolholder 82 communicates between annular gap 110 and an axial duct 122 in toolholder 82. Axial duct 122 is coupled to a radial duct 124 which in turn is coupled to a central axial duct 126 in a probe 128 which is removably held in toolholder 82 by a setscrew 130. Probe 128 has a slender elongated outer end 132 which terminates in a nozzle 134. In the operation of this embodiment, compressed air is forced from gap 110 through . .
S()3 opening 120 and through ducts 122, 124, and 126 out nozzle 134 to blow chips and coolant out of a drilled and/or tapped hole into which probe end 132 is inserted. However, with a coolant-through-the-tool type of tool inserted into toolholder 82 in place of probe 128, coolant can be conducted from gap 110 through opening 120 and ducts 122, 124 to the coolant-through-the-tool tool.
The connection between coolant socket 94 and gap 110 is effected by a coupling tube 136 which is mounted in a block 138 attached to gland block 102 and is coupled to gap 110 through a duct 140 in block 102. Coupling tube 136 has an 0-ring 142 which interacts with bushing 144 to seal the connection between socket 94 and coupling tube 136. Either coolant or compressed air can be conducted from socket 94 to gap 110 via tube 136 and duct 140.
To effect correct alignment between coupling tube 136 and socket 94, an alignment pinl46 is moved into and out of a no~h 147 (Fig. 6) in an adjacent flange 148 of toolholder 82 to lock toolholder 82 in a predetermined angular position with respect to gland block 102 when it is stored in the tool magazine (not shown) or is being moved between the tool magazine and spindle 84. Alignment pin 146 is attached to plunger 150 which is slideable in an axial bore 152 in block 138 and is normally spring biased inwardly by a compression spring 154. An abutment 156 opposite the inner end of plunger 150 bears thereagainst to move alignment pin 146 away from flange 148 when toolholder 82 is mounted in spindle 84. When toolholder 82 is removed from spindle 84, spring 154 forces plunger 150 inwardly and causes alignment pin 146 to engage notch 147 in flange 1480 An annular splash shield 158 is attached to the front of gland block 102 around toolholder 82 to limit the splashing of chips and coolant regardless of whether coolant or compressed air ` 30 is being applied to toolholder 82.
~08~S03 Although the illustrative embodiments of the invention have been described in considerable detail for the purpose of fully disclosing a practical operative structure incorporating the invention, it is to be understood that the particular apparatus shown and described is intended to be illustrative only and that the various novel features of the invention may be incorporated in oth~r structural forms without departing from the spirit and scope of the invention as defined in the subjoined claims.
_ g _
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:-
1. In a machine tool having a spindle and means on said spindle for receiving a toolholder and for clamping said tool-holder thereto, and having a conduit mounted adjacent to said spindle and means for coupling said conduit to said toolholder when said toolholder is clamped in said spindle, the improve-ment characterized by a duct in said toolholder positioned to mate with said coupling means, a hollow probe on said tool-holder coupled to said duct, and means for forcing a compressed gas through said conduit, coupling means and duct, and out said probe to blow chips and coolant out of holes in a workpiece ad-jacent to said probe.
2. In a machine tool having a spindle and means on said spindle for receiving a toolholder and for clamping said tool-holder thereto, the improvement characterized by a first duct in said spindle, a second duct in said toolholder positioned to mate with said first duct when said toolholder is clamped to said spindle, a hollow probe on said toolholder coupled to said second duct, and means for forcing a compressed gas through said first and second ducts and out said probe to blow chips and coolant out of holes in a workpiece adjacent to said probe.
3. The machine tool according to claim 2 and also character-ized by means for positioning said spindle with respect to said workpiece to insert said probe into a hole in said workpiece in position to blow chips and coolant out of said hole.
4. The machine tool according to claim 2 and further charac-terized by an insertion tube coupled to said first duct and ex-tending into the region occupied by said toolholder, said in-sertion tube being positioned to enter said second duct when said toolholder is clamped to said spindle to couple said first duct to said second duct.
5. The machine tool according to claim 2 and also character-ized by means for forcing a coolant fluid through said first duct.
6. The machine tool according to claim 5 characterized in that said means for forcing said compressed gas and coolant fluid through said first duct comprises a rotary union coup-led to said first duct, a source of compressed gas coupled to said rotary union, a source of coolant fluid coupled to said rotary union, and means for controlling application of said compressed gas and coolant fluid to said rotary union.
7. The machine tool according to claim 2 characterized in that there is an axial bore in said spindle and further comprising a drawbolt slidably mounted in said axial bore for axial movement between a retracted position and an ex-tended position, an axial bore in said drawbolt which con-stitutes said first duct, a rotary union coupled to the inner end of said drawbolt and to said first duct therein, and wherein said means for forcing compressed gas through said first duct comprises a source of compressed gas coup-led to said rotary union and valve means for controlling the application of said compressed gas to said rotary union.
8. The machine tool according to claim 1 characterized in that said toolholder is rotatably mounted in a block and wherein said coupling means includes a rotary gland coupled between said block and said toolholder, said duct being coupled to said rotary gland, and also comprising a coupling tube in said block coupled to said rotary gland and positioned to mate with said conduit.
9. The machine tool according to claim 8 and also character-ized by a socket on the end of said conduit positioned to mate With said coupling tube.
10. The machine tool according to claim 8 and also character-ized by latch means for latching said block and said tool-holder in a predetermined relative position when said tool-holder is not clamped in said spindle, and means for releas-ing said latch means when said toolholder is clamped in said spindle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79662077A | 1977-05-13 | 1977-05-13 | |
| US796,620 | 1977-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081503A true CA1081503A (en) | 1980-07-15 |
Family
ID=25168626
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,346A Expired CA1081503A (en) | 1977-05-13 | 1978-05-01 | Chip remover for drilled and/or tapped holes |
| CA369,339A Expired CA1131948B (en) | 1977-05-13 | 1981-01-26 | Chip remover for drilled and/or tapped holes |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA369,339A Expired CA1131948B (en) | 1977-05-13 | 1981-01-26 | Chip remover for drilled and/or tapped holes |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS53141987A (en) |
| AU (1) | AU510104B2 (en) |
| BE (1) | BE866899A (en) |
| CA (2) | CA1081503A (en) |
| CH (1) | CH628268A5 (en) |
| DE (1) | DE2820165B2 (en) |
| FR (1) | FR2390231A1 (en) |
| GB (1) | GB1601010A (en) |
| NL (1) | NL7805208A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5942230A (en) * | 1982-08-31 | 1984-03-08 | Fuji Kuki Kk | Method of grinding and polishing working by machining center |
| JPS5976749A (en) * | 1982-10-23 | 1984-05-01 | Okuma Mach Works Ltd | Washing of working surface |
| DE3320598C2 (en) * | 1983-06-08 | 1986-10-16 | Werner und Kolb Werkzeugmaschinen GmbH, 1000 Berlin | Machine tool with a device for removing machining residues |
| ATE24288T1 (en) * | 1983-08-19 | 1987-01-15 | Scharmann Gmbh & Co | HORIZONTAL DRILLING AND MILLING MACHINE WITH A HORIZONTALLY ADJUSTABLE DRILLING AND MILLING SPINDLE AND A FACE PLATE WITH FACE SLIDE. |
| JPS60134506U (en) * | 1984-02-17 | 1985-09-07 | 日立精工株式会社 | Spindle device in printed circuit board processing machine |
| DE3423060A1 (en) * | 1984-06-22 | 1986-01-02 | Ex-Cell-O Corp., Troy, Mich. | Tool-spindle arrangement |
| GB2163980B (en) * | 1984-09-04 | 1987-10-28 | Miyakawa Industry Co Ltd | Attachment with air ejector |
| DE3518748A1 (en) * | 1985-05-24 | 1986-12-04 | Rudolf 5870 Hemer Albert | Drilling machine, especially for drilling holes in hollow bodies |
| DE8526544U1 (en) * | 1985-09-17 | 1987-04-23 | Chiron-Werke Gmbh, 7200 Tuttlingen | Machine tool |
| DE4403327A1 (en) * | 1994-02-03 | 1995-08-10 | Karl Bauch | Cleaning device for multi-shafted machine tool |
| DE10205234C1 (en) * | 2002-02-08 | 2003-07-24 | Wto Werkzeug Einrichtungen Gmb | Tool head for machine tool has internal cooling medium feed between spindle bearing housing or associated auxiliary housing and modular attachment fitted to spindle or holder |
| CN110216579B (en) * | 2019-06-25 | 2024-05-17 | 张劲松 | Air-float main shaft structure of scribing machine for cooling and cleaning water in shaft |
| CN110774028A (en) * | 2019-11-25 | 2020-02-11 | 上海工程技术大学 | Clamp with workpiece lubricating and cooling functions |
| CN117102930B (en) * | 2023-10-24 | 2024-01-05 | 湖南荣科精密制造有限公司 | Clamping fixture for machine tool spindle |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2240795A (en) * | 1938-01-21 | 1941-05-06 | Nat Supply Co | Drilling machine |
| CH211453A (en) * | 1938-09-09 | 1940-09-30 | Bosch Gmbh Robert | Impact drill with flushing fan. |
| DE908331C (en) * | 1944-01-01 | 1954-04-05 | Siemens Ag | Chip blower for drill holes |
| GB724421A (en) * | 1952-02-25 | 1955-02-23 | Glenn L Martin Co | Chip removing and lubricating device for a machine tool |
| GB771415A (en) * | 1955-07-02 | 1957-04-03 | Morris Commercial Cars Ltd | Swarf extractor for blind holes |
| JPS538063Y2 (en) * | 1971-07-17 | 1978-03-01 | ||
| DE2152951C3 (en) * | 1971-10-23 | 1981-08-13 | SIG Schweizerische Industrie-Gesellschaft, 8212 Neuhausen am Rheinfall | Device for discharging the chips on a drilling machine, in particular deep hole drilling machine |
| JPS5034273Y2 (en) * | 1972-04-26 | 1975-10-06 | ||
| JPS5432256B2 (en) * | 1972-05-27 | 1979-10-13 | ||
| GB1435166A (en) * | 1972-11-11 | 1976-05-12 | Nagel Masch Werkzeug | Drilling |
| DE2417228A1 (en) * | 1974-04-09 | 1975-11-06 | Heller Geb | PROCEDURE FOR SUCTIONING SMALL DRILLS FROM THE DRILLING SITE OF A DRILL AND DRILL, DRILL AND ADAPTER FOR CARRYING OUT THE PROCEDURE |
| CH596946A5 (en) * | 1975-09-09 | 1978-03-31 | Infranor Sa |
-
1978
- 1978-04-20 AU AU35279/78A patent/AU510104B2/en not_active Expired
- 1978-05-01 CA CA302,346A patent/CA1081503A/en not_active Expired
- 1978-05-09 DE DE19782820165 patent/DE2820165B2/en not_active Withdrawn
- 1978-05-09 CH CH501678A patent/CH628268A5/en not_active IP Right Cessation
- 1978-05-10 BE BE187548A patent/BE866899A/en unknown
- 1978-05-11 FR FR7814014A patent/FR2390231A1/en not_active Withdrawn
- 1978-05-12 NL NL7805208A patent/NL7805208A/en not_active Application Discontinuation
- 1978-05-12 JP JP5647478A patent/JPS53141987A/en active Pending
- 1978-05-12 GB GB1918778A patent/GB1601010A/en not_active Expired
-
1981
- 1981-01-26 CA CA369,339A patent/CA1131948B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53141987A (en) | 1978-12-11 |
| NL7805208A (en) | 1978-11-15 |
| FR2390231A1 (en) | 1978-12-08 |
| CA1131948B (en) | 1982-09-21 |
| DE2820165A1 (en) | 1978-11-16 |
| AU3527978A (en) | 1979-10-25 |
| AU510104B2 (en) | 1980-06-05 |
| BE866899A (en) | 1978-11-10 |
| DE2820165B2 (en) | 1981-06-25 |
| GB1601010A (en) | 1981-10-21 |
| CH628268A5 (en) | 1982-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MZSU | Surrender | ||
| MKEX | Expiry |