CA2051421A1 - Apparatus for joining parts with little strength and corresponding method - Google Patents
Apparatus for joining parts with little strength and corresponding methodInfo
- Publication number
- CA2051421A1 CA2051421A1 CA 2051421 CA2051421A CA2051421A1 CA 2051421 A1 CA2051421 A1 CA 2051421A1 CA 2051421 CA2051421 CA 2051421 CA 2051421 A CA2051421 A CA 2051421A CA 2051421 A1 CA2051421 A1 CA 2051421A1
- Authority
- CA
- Canada
- Prior art keywords
- screw
- parts
- screws
- cores
- screw spindle
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
Abstract
Abstract of the Disclosure An apparatus for screwing together parts with little strength, in particular for screwing together shells, molds, foundry cores, preferably bottom cores or water-jacketed cores, is designed for a simple handling of the parts concerned such that it includes a gripping device (3) for picking up the parts (1, 2) to screwed together, and at least one screw driver (6) comprising a screw spindle (10) and a drive means (11) for the screw spindle. In an especially favorable embodiment, the screw spindle (10) is spring mounted in direction of the screw feed, i.e. in axial direction or also in radial direction, if need arises.
(Figure 2)
(Figure 2)
Description
) P.PPARA~US FOR JOINI~TG PA~'3 ~IT}I LITTLE
ST~lG'r}~ l~D COR~ IG ~ OD
The invention relates to an apparatus for joining parts with little strength, in particular an apparat~s ~or scr~wing together sholls, molds, ~oundry cores, pr~ferably bottom cores and water-jacketed S cores, as w~ll as a corresponding method.
The joining o~ parts with little stren~th i5 alway~ a problem, since a complicated handling or a costly transportation o~ such parts to a screwing station can lead already to a breaXage o~ these parts.
To avoid a breakage og the parts to be joined, it is also neeessary to provide for both a fine feed and a slight tightening torque o~ the scre~.
- Cores as are employed in the ~oundry practice, are such parts with lit~le strength, so that the p~oblems arising in the practice will be descri~ed below wi~h reference to such cores.
- In the foundry practice, cores are formed by hand or with the aid of core molding machines in sp~eial, multipart core boxes or core dies. In general, the cores are manu~actured by ~lowing, plugging and shooting. ~he individual cores are assembled or joined in separate operations by bonding or nailing. As a result, the method of manufacture is :
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ST~lG'r}~ l~D COR~ IG ~ OD
The invention relates to an apparatus for joining parts with little strength, in particular an apparat~s ~or scr~wing together sholls, molds, ~oundry cores, pr~ferably bottom cores and water-jacketed S cores, as w~ll as a corresponding method.
The joining o~ parts with little stren~th i5 alway~ a problem, since a complicated handling or a costly transportation o~ such parts to a screwing station can lead already to a breaXage o~ these parts.
To avoid a breakage og the parts to be joined, it is also neeessary to provide for both a fine feed and a slight tightening torque o~ the scre~.
- Cores as are employed in the ~oundry practice, are such parts with lit~le strength, so that the p~oblems arising in the practice will be descri~ed below wi~h reference to such cores.
- In the foundry practice, cores are formed by hand or with the aid of core molding machines in sp~eial, multipart core boxes or core dies. In general, the cores are manu~actured by ~lowing, plugging and shooting. ~he individual cores are assembled or joined in separate operations by bonding or nailing. As a result, the method of manufacture is :
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2~51~
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very complicatad, labor intensive and time-consuming ~G~rman Patent DE 3S 26 265 and German Utility Model G~ 75 15 919).
Tha point of departure i.or the apparatus or S respectiv~ly the method o~ the present invention is the stat~ o~ the art known ~rom Germall OS 25 22 1~1. Known ~rom ~his cited reference is a method or respectively an apparatus ~or joining multipa~:, heat-cura~le ~oundry GoreS. ~he foundry cores are interconnected by means o~ metal pins, with th~ latter being driven in and for~ing a press fit with the cores.
Further known ~rom German OS 34 24 911 is per see a method of driving a screw into thin-walled metal sheets as w~ll as an apparatus ~or carryin~ out the method. ~he method is concerned with dri~iny a screw wikh a sel~-tapping thread into thin~walled metal shaet~, wi~h the resistance o~ ~he screw to tearin~ out beinq increased in that the screw pulls in the metal sheet in the shape o~ a cra~er, i.e., it de~orms it ~0 accordingly.
Further it has been found in practice when joining par~s with little strength or when assembling individual cores by nailing or screwing that th~e material o~ the parts to be joined breaks easily as a result o~ shearing forces which occ~r in this process.
It is there~ore the objec~ of the present :' invention to ~irst provide for an apparatus ~or joinin~
parks with little strength, in particular for joining shells, molds and ~oundry cores, pre~erably bottom cores and water-jacketed cores, which allows to ~ring the parts to be joined, without any intermediate handling, directly from the manufacturing station to the screwing s~ation. In so doing, it is intended to reduce considerably the risk o~ damage to ~he parts to be joined or even of breaXage of the material-.
Furthermore, it is the object to provide ~or a corresponding method.
2 ~ 2 ~
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very complicatad, labor intensive and time-consuming ~G~rman Patent DE 3S 26 265 and German Utility Model G~ 75 15 919).
Tha point of departure i.or the apparatus or S respectiv~ly the method o~ the present invention is the stat~ o~ the art known ~rom Germall OS 25 22 1~1. Known ~rom ~his cited reference is a method or respectively an apparatus ~or joining multipa~:, heat-cura~le ~oundry GoreS. ~he foundry cores are interconnected by means o~ metal pins, with th~ latter being driven in and for~ing a press fit with the cores.
Further known ~rom German OS 34 24 911 is per see a method of driving a screw into thin-walled metal sheets as w~ll as an apparatus ~or carryin~ out the method. ~he method is concerned with dri~iny a screw wikh a sel~-tapping thread into thin~walled metal shaet~, wi~h the resistance o~ ~he screw to tearin~ out beinq increased in that the screw pulls in the metal sheet in the shape o~ a cra~er, i.e., it de~orms it ~0 accordingly.
Further it has been found in practice when joining par~s with little strength or when assembling individual cores by nailing or screwing that th~e material o~ the parts to be joined breaks easily as a result o~ shearing forces which occ~r in this process.
It is there~ore the objec~ of the present :' invention to ~irst provide for an apparatus ~or joinin~
parks with little strength, in particular for joining shells, molds and ~oundry cores, pre~erably bottom cores and water-jacketed cores, which allows to ~ring the parts to be joined, without any intermediate handling, directly from the manufacturing station to the screwing s~ation. In so doing, it is intended to reduce considerably the risk o~ damage to ~he parts to be joined or even of breaXage of the material-.
Furthermore, it is the object to provide ~or a corresponding method.
2 ~ 2 ~
According to the invention, the foregoing problem is soLved by providing a gripping device _ for gripping the pa~ts, to be joined and least one scsew driver comprising a screw spindle and a drive means ~or the screw spindle. In a particularly a~vantageous ~annar, the screw spindle is spring mounted at least in ~he direction o~ the screw ~eed.
It has been recognized, first, that a proper joining o~ the parts concerned requires a gripping d~vice ~or gripping the parts to be joined and at least one screw driver co~prising a screw spindle and a drive means there~or. It has ~urther been recognized that the damage to the material or the breaka~es o~ th2 material which frequently occur when parts with little strength are screwed together, is primarily due to a too "coarse" screw feed. According to ~he invention, ~his "coarse" screw ~ed is reduced by a resili~nt support o~ the screw spindle at least in thc direction o~ the scr~w ~eed, when the screw m~ets with a ~0 resistance on tha side o~ the material.
In a particularly ad~anta~eous manner, a spring housing is arranged between the drive means of the screw spindle and the screw spindle to pro~ide for a resilient support o~ the latter. This spring housing accommodates at least one spring element which is operati~e between the drive means and the screw spindle.
~or purposes of balancing the feed diS~erences between the advance Or the screw spindle and the screw insertion speed which is defined by the both the s~eed and the thread pitch ~ the screw to be driven in, without adversely affecting tha contact pressure of the screw spindle on the screw and thus on the material of the parts to bè screwed toqether, a driving pin is provided in a ~urther =anner, which is ,'' ' .
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It has been recognized, first, that a proper joining o~ the parts concerned requires a gripping d~vice ~or gripping the parts to be joined and at least one screw driver co~prising a screw spindle and a drive means there~or. It has ~urther been recognized that the damage to the material or the breaka~es o~ th2 material which frequently occur when parts with little strength are screwed together, is primarily due to a too "coarse" screw feed. According to ~he invention, ~his "coarse" screw ~ed is reduced by a resili~nt support o~ the screw spindle at least in thc direction o~ the scr~w ~eed, when the screw m~ets with a ~0 resistance on tha side o~ the material.
In a particularly ad~anta~eous manner, a spring housing is arranged between the drive means of the screw spindle and the screw spindle to pro~ide for a resilient support o~ the latter. This spring housing accommodates at least one spring element which is operati~e between the drive means and the screw spindle.
~or purposes of balancing the feed diS~erences between the advance Or the screw spindle and the screw insertion speed which is defined by the both the s~eed and the thread pitch ~ the screw to be driven in, without adversely affecting tha contact pressure of the screw spindle on the screw and thus on the material of the parts to bè screwed toqether, a driving pin is provided in a ~urther =anner, which is ,'' ' .
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arranged on ~he spring element, and, thus, represents connec~inq member or an operative connection between ~he spring element and the screw.
Furthermore, it has been recognized that besides a "coarsa" screw ~eed, a t:oo high tighteninq tor~ue can lead likewise to a breakage o~ material in parts with little strenqth. It was therefore necessary to reduce the tightening torque, so as to avoid a breakage of the material, in such a manner, ~hat tolerance ranges are no longer pos;sible. It would be possible, though, to hold the scr~ws by clamping jaws whe~ they are injected automatically by means o~
co~pressed air, in which event the clamping jaws could ` apply the h~lding pressure, ~or example, via lea~
springs. However, in so doinq, the tigh~eniny torque would be considerably in~luenced when the SGreW head is pushed ~hrouqh the clamping jaw and against the holding pressure o~ th~ lea~ springs, so that i~ would ; ~ecome impossible ~ maintain any longer the uni~orm tightening torqua which is necessary to apply to the screw.
W~th ~espect to a limitation o~ the tightening torque, it is ~here~ore o~ special ad~antage that the torque o~ the drive means or respectively the s rew driver is de~ined by a preferably adjustable, - au~o~atic cut-of~ clutch which is provided in the drive means.
When the screws are injected automatic~lly, clamping jaws are provided ~or holdinq the screws. The holding pressure is genera~ed by ~eans of pneumatic or hydraulic cylinder-piston arrangements. me clamping jaws open ~or the passage of the screws.
~ owever, it happens specifically when parts with little strength, in particular brittle parts are joined, that particles separate when the screw is driven in, which subse~uently penetrate into the region o~ the clamping jaws and increase there the frictional :~ ~5-valu~s, or even result in damage ~o the jaws.
There~ore, in a ~urther em~odiment o~ the teaching of the presen~ invention, thQ particles o~ the parts to be s~-rewed together, which enter durlng the screwing into the region o~ the apparatus, are hlown out or sucked o~ by means of a blower.
For purposes of being able to insert in a proper manner, wi~h the apparatus of the present invention, also s~rews which are no~ in alignment with the original axis o~ the screw spindle, the screw spindle is resilisntly supported in a further ad~antagsous manner also in transverse direction to the : direction of the screw feed~ Thus, a small cle.arance o~ the screw is creat~d or~hogonally to the direction o~ ~he screw feed, which permits the screw spindle to .~ tilt slightly.
As regards the preparation o~ the scr.ews to ba driven in, and having particularly in mind an automatic joinin~ o~ the parts concerned, an injector is pro~id~d which ~eds th~ screws to b~ entered by the screw driver. For purposes of ensuring a trouble~ree advanca of the individual screws to the screw spindle or respectively to ~he parts to be screwed together, the injector is provided with a re~lected light barrier . 2S ~or monitoring and controlling these operations.
:. Finally, the screw drivers can be changed in their position by means of spindles, whereby the screw drivers are adjust2d to di~f erent screw-- inserting positions.
By the method of joining parts with little strength, in particular of joining shells, molds, foundry cores, pre~erably bottom cores and water-: jacketed cores, as is provided ~y the present ;~ invention, the parts to be joined are first pic~ed up by maans of a gripping device and jointly stayed.
; Then, the parts are positioned in the working range of .. a screw driver. In the case of screwing together j :
4 2 ~
~oundry cores, ~le parts or respectively cores are . position~d in an orderly fashion above one or several ; screw drivers. Subsequently, one or se~eral screws are in~ ected into the screw driver~ The parts are screwed togather, wi~h a resilient support of the screw spindle balancing ~he screw ~eed, i.e., the screw insertion speed, in a particularly adva~tageous manner for th~
purpose of avoiding damage to the parts or avoiding a brittle frac~ure, and withou~ adv~_rsely affecting the . 10 contact pressure.
Yor the purpose of avoiding damage to the parts to be joined, the operation of driving in the i~ screw is ~u~ther made advantageous in such a manner that the tor~ue of the screw dxiver is de~ined or respectively controlled by a preferably ~djustable, automatic cutoff clutch.
Th~re are ~arious other possibilitie!; o~
con~iguring and further developing the taachin~ Q~ the present i~ven~ion in an advantageous manne.r. ~rO this end, it should be re~erred, first, to the subsequent clalms and, second, to ~he following descriptlon o~ an embodiment o~ the inven~ion with reference to the drawing. In connection with the description of a pre~erred embodiment with reference to the drawing, also generally pre~erred embodiments and further developm~nts o~ the teaching will be explained.
Illustrated in the drawing is in Figura 1 a schematic side view o~ an embodiment of the apparatus according to the present invention;
Pigure 2 a schematic ~ront view of the apparatus o~ Figure 1;
Figure 3 a schematic top view af the apparatus of Figure l;
Figure 4 an enlarged exploded view of the parts to be screwed together, the screw driver and the screw . - , .
. -7-Figure 5 a longitudinal sectional view, partially enlarged, o~ the apparatus according to the present invention; and Figure 6 an axial schematic view o~ a scre~
S driver o~ ~he apparatus of Figure S.
The Figures 1-3, 5 and 6 illus~rate an ~mbodiment o~ an apparatus o~ the present invention ~or screwing together parts l, 2, Wi~l little strength.
The apparatus is a screwing device for screwing together foundry cores, namely bottom cores and water-jacketed cores 1, 2.
The apparatus o~ ~he prese~t invention includes a gripping de~ice 3 for picking up the. foundry cores 1, z which are to be screwed tog~her, and a scr~w driver 6 comprising a screw spindle lo and a drive means 11 ~or the screw spindla lo.
As shown in thQ illustration o~ Fi~ur.e 6, the scr2w spindle 10 is spring mounted at least in the direction o~ ~he scrsw feed. As can be noted, this is accomplished in ~ha~ a spring housing ~2 wi~h a spring elemen~ 13 which is operative between ~ha drive means ~1 and the screw spindle 10, is arranged be~ween the drive means 1~ o~ the screw spindle lo and the screw spindle 10 for a resilient support of the latter.
Arranged on the spring ele~ent 13 is a driving pin 14.
-: Furthermore, the torque of the dri~e means 11 or respectively the screw driver 6 is defined by an adjustable, automatic cu~of~ clutch provided in the drive means 11.
For holding the screws 5 when they are automatically injected, clamping jaws 15 arP pxovided.
The necessary holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements 16.
The clamping jaws 15 open only for the passage o~ the screws 5.
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Particles of the parts 1, ~, which may enter into the region o~ the apparatus during ~he screwing opera~ion, are removed by means of a blower 17 or via a suction device.
Not shown in the Fiqures is that the screw spindle ~o can also ~e sprin~ mounted transversely to th~ dire~tion of the screw ~eed, so that it will he easy to al50 drive in screws 5 which are not in alignment ~ith the original axis of the screw spind}e 10.
Indicated at 4 in Figures 1 and 5 is an injector 4 ~or feeding the screws 5 to be driven in by the screw d~iver 5. The injector ~ can also be provided with a device ~or singling the scr~ws 5, which is not shown in the Figures.
Tha operation o~ the apparatus accordin~ to ~he present invention is as follows: The parts l, 2 or respectively ~hQ bottom core ~ and the water~jac~eted core 2 are assembled or joined, pic~ed up by the gripping de~icR 3, and jointly ~tayed~ SubsQquently~
~he stayed parts 1, 2 are moved above the screw driver 6. ~ screw'5 or screws 5 are pneumatically fed b~
means of the injector 4 through feed hoses ~ into the clampinq jaws 15. The parts 1, 2 are then screwed together. The respective screwing position of the spindle lo can be preset via an adjusting spindle 7.
The scre~ spindles lo with drive motor 11, spri:ng housing 12, spring ~3, and driving pin 14 serve to gently screw together parts 1, 2, with the screw feed or respectively the screw inserting speed being balanced, without adversely a~fecting the con~act .: pressure which the screw spindle lo exerts on the screw 5. The screws are held by the clamping jaws 15 which are ac~uated via a pneumatic cylinder 16. Only ~or the . 35 purpose of a complete illustration, ball bearings and a - bearing sleeve are indicated at numerals ~8, 19.
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Finally, it should hare be emphasized one more time that the teaching of th8 present invention is concernad with the~ j oining of parts having little strength. The screwing tog~ther o~ foundxy cores is S here broughk up only as an example.
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Furthermore, it has been recognized that besides a "coarsa" screw ~eed, a t:oo high tighteninq tor~ue can lead likewise to a breakage o~ material in parts with little strenqth. It was therefore necessary to reduce the tightening torque, so as to avoid a breakage of the material, in such a manner, ~hat tolerance ranges are no longer pos;sible. It would be possible, though, to hold the scr~ws by clamping jaws whe~ they are injected automatically by means o~
co~pressed air, in which event the clamping jaws could ` apply the h~lding pressure, ~or example, via lea~
springs. However, in so doinq, the tigh~eniny torque would be considerably in~luenced when the SGreW head is pushed ~hrouqh the clamping jaw and against the holding pressure o~ th~ lea~ springs, so that i~ would ; ~ecome impossible ~ maintain any longer the uni~orm tightening torqua which is necessary to apply to the screw.
W~th ~espect to a limitation o~ the tightening torque, it is ~here~ore o~ special ad~antage that the torque o~ the drive means or respectively the s rew driver is de~ined by a preferably adjustable, - au~o~atic cut-of~ clutch which is provided in the drive means.
When the screws are injected automatic~lly, clamping jaws are provided ~or holdinq the screws. The holding pressure is genera~ed by ~eans of pneumatic or hydraulic cylinder-piston arrangements. me clamping jaws open ~or the passage of the screws.
~ owever, it happens specifically when parts with little strength, in particular brittle parts are joined, that particles separate when the screw is driven in, which subse~uently penetrate into the region o~ the clamping jaws and increase there the frictional :~ ~5-valu~s, or even result in damage ~o the jaws.
There~ore, in a ~urther em~odiment o~ the teaching of the presen~ invention, thQ particles o~ the parts to be s~-rewed together, which enter durlng the screwing into the region o~ the apparatus, are hlown out or sucked o~ by means of a blower.
For purposes of being able to insert in a proper manner, wi~h the apparatus of the present invention, also s~rews which are no~ in alignment with the original axis o~ the screw spindle, the screw spindle is resilisntly supported in a further ad~antagsous manner also in transverse direction to the : direction of the screw feed~ Thus, a small cle.arance o~ the screw is creat~d or~hogonally to the direction o~ ~he screw feed, which permits the screw spindle to .~ tilt slightly.
As regards the preparation o~ the scr.ews to ba driven in, and having particularly in mind an automatic joinin~ o~ the parts concerned, an injector is pro~id~d which ~eds th~ screws to b~ entered by the screw driver. For purposes of ensuring a trouble~ree advanca of the individual screws to the screw spindle or respectively to ~he parts to be screwed together, the injector is provided with a re~lected light barrier . 2S ~or monitoring and controlling these operations.
:. Finally, the screw drivers can be changed in their position by means of spindles, whereby the screw drivers are adjust2d to di~f erent screw-- inserting positions.
By the method of joining parts with little strength, in particular of joining shells, molds, foundry cores, pre~erably bottom cores and water-: jacketed cores, as is provided ~y the present ;~ invention, the parts to be joined are first pic~ed up by maans of a gripping device and jointly stayed.
; Then, the parts are positioned in the working range of .. a screw driver. In the case of screwing together j :
4 2 ~
~oundry cores, ~le parts or respectively cores are . position~d in an orderly fashion above one or several ; screw drivers. Subsequently, one or se~eral screws are in~ ected into the screw driver~ The parts are screwed togather, wi~h a resilient support of the screw spindle balancing ~he screw ~eed, i.e., the screw insertion speed, in a particularly adva~tageous manner for th~
purpose of avoiding damage to the parts or avoiding a brittle frac~ure, and withou~ adv~_rsely affecting the . 10 contact pressure.
Yor the purpose of avoiding damage to the parts to be joined, the operation of driving in the i~ screw is ~u~ther made advantageous in such a manner that the tor~ue of the screw dxiver is de~ined or respectively controlled by a preferably ~djustable, automatic cutoff clutch.
Th~re are ~arious other possibilitie!; o~
con~iguring and further developing the taachin~ Q~ the present i~ven~ion in an advantageous manne.r. ~rO this end, it should be re~erred, first, to the subsequent clalms and, second, to ~he following descriptlon o~ an embodiment o~ the inven~ion with reference to the drawing. In connection with the description of a pre~erred embodiment with reference to the drawing, also generally pre~erred embodiments and further developm~nts o~ the teaching will be explained.
Illustrated in the drawing is in Figura 1 a schematic side view o~ an embodiment of the apparatus according to the present invention;
Pigure 2 a schematic ~ront view of the apparatus o~ Figure 1;
Figure 3 a schematic top view af the apparatus of Figure l;
Figure 4 an enlarged exploded view of the parts to be screwed together, the screw driver and the screw . - , .
. -7-Figure 5 a longitudinal sectional view, partially enlarged, o~ the apparatus according to the present invention; and Figure 6 an axial schematic view o~ a scre~
S driver o~ ~he apparatus of Figure S.
The Figures 1-3, 5 and 6 illus~rate an ~mbodiment o~ an apparatus o~ the present invention ~or screwing together parts l, 2, Wi~l little strength.
The apparatus is a screwing device for screwing together foundry cores, namely bottom cores and water-jacketed cores 1, 2.
The apparatus o~ ~he prese~t invention includes a gripping de~ice 3 for picking up the. foundry cores 1, z which are to be screwed tog~her, and a scr~w driver 6 comprising a screw spindle lo and a drive means 11 ~or the screw spindla lo.
As shown in thQ illustration o~ Fi~ur.e 6, the scr2w spindle 10 is spring mounted at least in the direction o~ ~he scrsw feed. As can be noted, this is accomplished in ~ha~ a spring housing ~2 wi~h a spring elemen~ 13 which is operative between ~ha drive means ~1 and the screw spindle 10, is arranged be~ween the drive means 1~ o~ the screw spindle lo and the screw spindle 10 for a resilient support of the latter.
Arranged on the spring ele~ent 13 is a driving pin 14.
-: Furthermore, the torque of the dri~e means 11 or respectively the screw driver 6 is defined by an adjustable, automatic cu~of~ clutch provided in the drive means 11.
For holding the screws 5 when they are automatically injected, clamping jaws 15 arP pxovided.
The necessary holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements 16.
The clamping jaws 15 open only for the passage o~ the screws 5.
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Particles of the parts 1, ~, which may enter into the region o~ the apparatus during ~he screwing opera~ion, are removed by means of a blower 17 or via a suction device.
Not shown in the Fiqures is that the screw spindle ~o can also ~e sprin~ mounted transversely to th~ dire~tion of the screw ~eed, so that it will he easy to al50 drive in screws 5 which are not in alignment ~ith the original axis of the screw spind}e 10.
Indicated at 4 in Figures 1 and 5 is an injector 4 ~or feeding the screws 5 to be driven in by the screw d~iver 5. The injector ~ can also be provided with a device ~or singling the scr~ws 5, which is not shown in the Figures.
Tha operation o~ the apparatus accordin~ to ~he present invention is as follows: The parts l, 2 or respectively ~hQ bottom core ~ and the water~jac~eted core 2 are assembled or joined, pic~ed up by the gripping de~icR 3, and jointly ~tayed~ SubsQquently~
~he stayed parts 1, 2 are moved above the screw driver 6. ~ screw'5 or screws 5 are pneumatically fed b~
means of the injector 4 through feed hoses ~ into the clampinq jaws 15. The parts 1, 2 are then screwed together. The respective screwing position of the spindle lo can be preset via an adjusting spindle 7.
The scre~ spindles lo with drive motor 11, spri:ng housing 12, spring ~3, and driving pin 14 serve to gently screw together parts 1, 2, with the screw feed or respectively the screw inserting speed being balanced, without adversely a~fecting the con~act .: pressure which the screw spindle lo exerts on the screw 5. The screws are held by the clamping jaws 15 which are ac~uated via a pneumatic cylinder 16. Only ~or the . 35 purpose of a complete illustration, ball bearings and a - bearing sleeve are indicated at numerals ~8, 19.
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Finally, it should hare be emphasized one more time that the teaching of th8 present invention is concernad with the~ j oining of parts having little strength. The screwing tog~ther o~ foundxy cores is S here broughk up only as an example.
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Claims (13)
1. Apparatus for joining parts (1,2) with little strength, in particular for joining shells, molds, foundry cores, preferably bottom cores and water-jacketed cores, characterized in that a gripping device (3) for picking up the parts (1,2) to be joined and at least one screw driver (6) comprising a screw spindle (10) and a drive means (11) for the screw spindle (10) are provided for screwing the parts together, that the screw driver (6) is arranged for adjustment by means of spindles (7), and that the screw spindle (10) is spring mounted at least in direction of the screw feed.
2. Apparatus according to Claim 1, characterized in that for a resilient support of the screw spindle (10), a spring housing (12) with at least one spring element (13) operative between the drive means (11) and the screw spindle (10) is arranged between the drive means (11) of the screw spindle (10) and the screw spindle (10).
3. Apparatus according to Claim 2, characterized in that the spring element (13) is designed as a compression spring.
4. Apparatus according to Claim 2 or 3, characterized in that a driving pin (14) is arranged on the spring element (13).
5. Apparatus according to one of Claims 1-4, characterized in that the torque of the drive means (11) or respectively the screw driver (6) is defined by a preferably adjustable, automatic cutoff clutch which is provided in the drive means (11).
6. Apparatus according to one of Claims 1-5, characterized in that the monitoring of the screw (5) to be driven in is effected by a detecting light sensor (20), preferably a reflected light sensor.
7. Apparatus according to one of Claims 1-6, characterized in that for the automatic injection of the screws (5) clamping jaws (15) are provided for holding the screws (5), that the holding pressure is generated by means of pneumatic or hydraulic cylinder-piston arrangements (16), and that the clamping jaws (15) open for the passage of the screws (5) without losing the centering of the screws.
8. Apparatus according to one of Claims 1-7, characterized in that particles of the parts (1, 2) to be screwed together, which enter into the region of the apparatus during the screwing operation, are blown out by means of a blower (17) or removed by means of a suction device.
9. Apparatus according to one of Claims 1-8, characterized in that the screw spindle (10) is spring mounted also transversely to the direction of the screw feed, so that screws (5) can be driven in, which are not in alignment with the original axis of the screw spindle (10).
10. Apparatus according to one of Claims 1-9, characterized in that an injector (4) is provided for supplying the screws (5) to be driven in by the screw driver (6).
11. Apparatus according to Claim 10, characterized in that the injector (4) includes a device for singling the screws (5).
12. Method of joining parts (1,2) with little length, in particular of joining shells, molds foundry cores, preferably bottom cores and water-jacketed cores, characterized by the following operations:
gripping and staying the parts (1,2) to be joined by means of a gripping device (3);
positioning the parts (1,2) in the working range of a screw driver (6); and injecting screws (5) into the screw driver (6) and screwing the parts (1,2) together, with the screw feed, i.e., the screw inserting speed being balanced, without adversely affecting the contact pressure, by a resilient support of the screw spindle (10).
gripping and staying the parts (1,2) to be joined by means of a gripping device (3);
positioning the parts (1,2) in the working range of a screw driver (6); and injecting screws (5) into the screw driver (6) and screwing the parts (1,2) together, with the screw feed, i.e., the screw inserting speed being balanced, without adversely affecting the contact pressure, by a resilient support of the screw spindle (10).
13. Method according to Claim 12, characterized in that when a screw (5) is driven in, the torque of the screw driver (6) is defined or respectively controlled by a preferably adjustable, automatic cutoff clutch.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893911635 DE3911635C1 (en) | 1989-04-10 | 1989-04-10 | Automatic screwing together of foundry cores - allowing cores to be assembled immediately after mfr. |
| DEP3911635.2-24 | 1989-04-10 | ||
| DEP4004903.5 | 1990-02-16 | ||
| DE19904004903 DE4004903C1 (en) | 1990-02-16 | 1990-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2051421A1 true CA2051421A1 (en) | 1990-10-11 |
Family
ID=25879758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2051421 Abandoned CA2051421A1 (en) | 1989-04-10 | 1990-03-01 | Apparatus for joining parts with little strength and corresponding method |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0467890B1 (en) |
| JP (1) | JPH07110394B2 (en) |
| CA (1) | CA2051421A1 (en) |
| ES (1) | ES2043359T3 (en) |
| WO (1) | WO1990011848A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112621195B (en) * | 2020-11-30 | 2021-10-08 | 九江市海纳电讯技术有限公司 | Combiner processing is with assembly debugging apron processingequipment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2549601A1 (en) * | 1975-11-05 | 1977-05-12 | Erich Klesatschke | Mechanical screw driver with head holding chuck - has tube form holder to hold screw head with some radial play to permit alignment |
| JPS5784686A (en) * | 1980-11-17 | 1982-05-27 | Hitachi Ltd | Construction of screw driver rotation |
| DE3424911A1 (en) * | 1984-07-06 | 1986-01-16 | Audi AG, 8070 Ingolstadt | Method of screwing a screw into thin-walled metal sheets and apparatus for carrying out the method |
| JPS61180664A (en) * | 1985-02-04 | 1986-08-13 | Honda Motor Co Ltd | Casting method for siamese type cylinder block stock |
| JPS61199551A (en) * | 1985-02-28 | 1986-09-04 | Isuzu Motors Ltd | Casting method for structural body having intricate hollow parts |
| DE3614007A1 (en) * | 1986-04-25 | 1987-11-05 | Bosch Gmbh Robert | DEVICE FOR THE AUTOMATIC FEEDING AND TURNING IN OF SCREWS |
| JPH0665448B2 (en) * | 1986-07-23 | 1994-08-24 | 本田技研工業株式会社 | Bolt tightening machine |
-
1990
- 1990-03-01 CA CA 2051421 patent/CA2051421A1/en not_active Abandoned
- 1990-03-01 ES ES90903594T patent/ES2043359T3/en not_active Expired - Lifetime
- 1990-03-01 WO PCT/DE1990/000140 patent/WO1990011848A1/en active IP Right Grant
- 1990-03-01 JP JP2503595A patent/JPH07110394B2/en not_active Expired - Fee Related
- 1990-03-01 EP EP19900903594 patent/EP0467890B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07110394B2 (en) | 1995-11-29 |
| EP0467890A1 (en) | 1992-01-29 |
| WO1990011848A1 (en) | 1990-10-18 |
| ES2043359T3 (en) | 1993-12-16 |
| EP0467890B1 (en) | 1993-06-02 |
| JPH04506179A (en) | 1992-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |