EP0142655A2 - An apparatus for abrading machining of the welding zone for the rims of bicycle and motor vehicle wheels - Google Patents
An apparatus for abrading machining of the welding zone for the rims of bicycle and motor vehicle wheels Download PDFInfo
- Publication number
- EP0142655A2 EP0142655A2 EP84110752A EP84110752A EP0142655A2 EP 0142655 A2 EP0142655 A2 EP 0142655A2 EP 84110752 A EP84110752 A EP 84110752A EP 84110752 A EP84110752 A EP 84110752A EP 0142655 A2 EP0142655 A2 EP 0142655A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rim
- rims
- abrading
- welding zone
- machining
- 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.)
- Withdrawn
Links
- 238000003466 welding Methods 0.000 title claims abstract description 17
- 238000003754 machining Methods 0.000 title claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0023—Other grinding machines or devices grinding machines with a plurality of working posts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/44—Single-purpose machines or devices for grinding rims of vehicle wheels, e.g. for bicycles
Definitions
- This invention relates to an apparatus for abrading machining of the welding zone for the rims of bycicle and motor vehicle wheels, and comprises a snap rotary table, a series of operative units arranged around the rotary table and provided with abrading tools, and chuck means on such a table for supporting the rims at working or machining position.
- the rims are rims obtained by end-to-end welding of a cut down size of suitable circle curved section.
- the prior art automatic apparatuses designed for the machining of the welding zone of rims for bicycles,morotcycles and the like, an example of which is shown and described in the Italian Patent No. 959.631, generally comprise three sets, that is a first set for the machining of the side edges and outside of the welding zone, a second set for rim transfer from the firstset to the third set, which carries out the machining of the inside of the rim welding zone and comprises a snap rotary table, chuck means on such a table for rim support and a series of operative units arranged along the table perimeter for machining the inner side of the rim.
- the inside of the welding zone is clear and accordingly the zone can be machined on each side thereof by the operative units located along the table periphery.
- reference numeral 1 denotes as a whole a snap rotary table by conventional drive means, not shown. At regular intervals or spacings along the periphery thereof, said table has a series of chuck means, denoted as a whole at 2, and designed to support rims 3, 3A at suitable position for machining of the welding zone B of the abutted ends of the circle bent section comprising the rim.
- Conventional operating units I, II, III, IV, V, VI, VII and VIII are arranged around the table, at angular intervals corresponding to the chuck means 2 and for machining with the respective abrading tool(s), such as grinding wheels M arranged thereon, said units being provided with tool driving means, feed thereof in accordance with the rim contour being machined, which feed is controlled by copying devices, if required.
- Said chuck means 2 which are all identical to one another, comprise a pair of elements 2a of L-shape as sidewise seen, which are vertically adjustably secured by means of screws 2b, and cantilever projecting by the lower side 2c from the table periphery.
- a pin 2d extends to the other element 2a of the pair and is chamfered at its projecting end 2e.
- the two pins of the pair are spaced apart from each other and an axis there between.
- said rim 3, 3A bears thereon from opposite sides of zones B, and therefore the latter is accessible from all sides.
- the chuck means 2 include an upper pressing member of 2f,made for example of plastics material, which is arranged on the rim at a vertical diameter midway between the two supporting pins 2d.
- This member 2f is secured to the stem 2g of a pneumatic jacket 2h, which is mounted on a bracket 2i that can be displaced and secured along a column 21 in accordance with the diameter of a rim 3, 3A being machined.
- Said column 21 is secured by screw means 2m to the upper face of table 1.
- the rims After being machined, the rims arrive one by one at an unloading station, at which the operative unit is located for rim transfer parallel to itself from the associated chuck to an unloading location.
- This unloading unit denoted as a whole at 100, comprises a stationary column 101, along which a shaft 102 is slidably mounted and operated by a pneumatic jack 103.
- the shaft 102 is integral with a ring nut 104 having a straddle or extension 105 to which a guide pin 106 is secured, the latter being downward facing and guided in a bushing 107.
- a bushing is integral with a straddle or extension 108 of said column 101.
- This shaft 102 has secured thereon a gear wheel 108', one for each chain 111.
- the shaft rotatably carries an arm 110 suitably provided with a bushing 112.
- said bushing112 is connected by a further arm 113 and articulated joint 114 to a pneumatic jack 115, which is pivoted at 116 to a support 117 integral with shaft 102, for example by said arm 105.
- said arm 110 has a bushing 118 rotatably carrying by axial and radial bearings 119 a unit for gripping the rim 3, 3A at the welding zone B.
- This unit comprises a pneumatic jack 120, the stem 121 of which extends in a bushing 123 having the jack cylinder connected thereto.
- a platform 124 is secured to bushing 123 and has two sides 125 between which a block 126 is slidably mounted.
- a connecting rod 127 is pivoted at 128 to said block and operates on a pin 129 of a lever 130 pivoted at 131 to said sides 125.
- the lever carries an adjustable jaw 132 which, under the control of said jack 120, clamps the rim against a pair of parallel horizontal pins 133 projecting from the sides 125. Therefore, the described unloading unit can cause vertical displacements, horizontal rotations about two axes (that of column 101 and that of bushing 123) and closing and opening of the clamp gripping the rim 3, 3A and comprising the mem - bers 132,133.
- the apparatus has eight operative units or stations I, II, III, IV, V, VI, VII and VIII, provided with abrading tools, such as grinding wheels, in the case of different granulation.
- the apparatus has a manual loading station K and an unloading station IX for the finished rim, at which the unloading device of Fig. 6,7 and 8 is arranged.
- the table After rim loading at the station K by the operator, as described in connection with Figs. 6,7 and 8, the table carries such a rim in front of unit I, which is also shown in Fig. 2.
- the grinding wheel M of this unit rough-shapes the welding zone along the inner central portion of rim corresponding about to the section or length R-R' of Fig. 9.
- the inclined grinding wheel therein located provides for rough-shaping of one half of the outer side or channel of the rim, that is the section or length a, while at the next unit or station IV the other half a' is rough-shaped.
- the unit or station V finishes the tips or crests P and Q outside of the rim.
- the unit or station VI is for prefinishing of the section or length R-R', and unit or station VII is for sides R"-R and R'-R"', and finally the unit or station VIII is for trimming the section or length R-R'.
- Unit or station IX is for unloading a finished rim as follows.
- the rim zone B is between the pins 133 and open jaw 132.
- the jacks 132, 103 and 2b are operated, so that the jaw 2f is lifted and leaves or releases the rim 3, 3A and the jaw 132 is closed and lifted and the rim is thereby lifted from the two lower bearings 2d. Then, the jack 115 is reversely controlled,which causes the arm 110 to rotate to the position F of Fig. 1, and then the jack 103 is lowered and jaw 132 opens, whereby the r 4 m can be removed. The cycle is repeated with a new stop of the table.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
- This invention relates to an apparatus for abrading machining of the welding zone for the rims of bycicle and motor vehicle wheels, and comprises a snap rotary table, a series of operative units arranged around the rotary table and provided with abrading tools, and chuck means on such a table for supporting the rims at working or machining position.
- The rims, referred to by the invention, are rims obtained by end-to-end welding of a cut down size of suitable circle curved section.
- Following welding, internal and external discontinuities occur at the end zone which, by jeopardizing the rim appearance and functionality, are removed by abrading machining.
- The prior art automatic apparatuses, designed for the machining of the welding zone of rims for bicycles,morotcycles and the like, an example of which is shown and described in the Italian Patent No. 959.631, generally comprise three sets, that is a first set for the machining of the side edges and outside of the welding zone, a second set for rim transfer from the firstset to the third set, which carries out the machining of the inside of the rim welding zone and comprises a snap rotary table, chuck means on such a table for rim support and a series of operative units arranged along the table perimeter for machining the inner side of the rim.
- The provision of such three sets makes the prior art apparatus cumbersome, also hazardous and in any case complicated. Surprisingly, it has been found that all of the workings involving the welding zone can be carried out by a reduced apparatus having only one set provided with a snap rotary table and a series of operative units for the machining of the whole welding zone, according to the invention it being provided that the rim chuck means to the table comprise at the bottom two opposite, pretruding, stationary and spaced apart bearings, and at the top a controlled clamping element which is applied on the rim and clamps the latter on the two underlying bearings.
- By arranging the rim so that the welding zone is located within the spacing between two protruding spaced apart bearings, the inside of the welding zone is clear and accordingly the zone can be machined on each side thereof by the operative units located along the table periphery.
- The invention will be more clearly understood from the following detailed description, as given be mere way of unre- strictive example, of a preferred embodiment thereof, which has been shown in the accompanying drawings, in which:
- Fig. 1 is a schematic plan view, with some parts having been omitted, of the apparatus according to the invention;
- Fig. 2 is a schematic side elevationalview showing one of the abrading units associated with the snap rotary table only partly shown;
- Fig. 3 is a side partly cutaway view of the device unloading the rims as machined by the snap rotary table;
- Fig. 4 is a fragmentary plan view showing the handling of the device of Fig. 3;
- Fig. 5 is a side elevational view showing the means clamping the rim and forming part of the unloading device shown in Figs. 3 and 4;
- Fig. 6 is a front view showing a chuck means with the mounted rim arranged on the snap rotary table;
- Fig. 7 is a side view of the object shown in Fig. 6;
- Fig. 8 is a plan view of the object shown in Figs. 6 and 7; and
- Fig. 9 is a cross-section showing a portion of a possible rim as machined on the apparatus shown in the preceding figures.
- Referring to the figures of the accompanying drawings, reference numeral 1 denotes as a whole a snap rotary table by conventional drive means, not shown. At regular intervals or spacings along the periphery thereof, said table has a series of chuck means, denoted as a whole at 2, and designed to support
rims - Conventional operating units I, II, III, IV, V, VI, VII and VIII are arranged around the table, at angular intervals corresponding to the chuck means 2 and for machining with the respective abrading tool(s), such as grinding wheels M arranged thereon, said units being provided with tool driving means, feed thereof in accordance with the rim contour being machined, which feed is controlled by copying devices, if required.
- Said chuck means 2, which are all identical to one another, comprise a pair of elements 2a of L-shape as sidewise seen, which are vertically adjustably secured by means of
screws 2b, and cantilever projecting by thelower side 2c from the table periphery. - At the free end of
side 2c and transversely thereto, apin 2d extends to the other element 2a of the pair and is chamfered at its projectingend 2e. The two pins of the pair are spaced apart from each other and an axis there between. At the bottom, saidrim - The chuck means 2 include an upper pressing member of 2f,made for example of plastics material, which is arranged on the rim at a vertical diameter midway between the two supporting
pins 2d. Thismember 2f is secured to thestem 2g of apneumatic jacket 2h, which is mounted on abracket 2i that can be displaced and secured along a column 21 in accordance with the diameter of arim - After being machined, the rims arrive one by one at an unloading station, at which the operative unit is located for rim transfer parallel to itself from the associated chuck to an unloading location.
- This unloading unit, denoted as a whole at 100, comprises a
stationary column 101, along which ashaft 102 is slidably mounted and operated by apneumatic jack 103. - The
shaft 102 is integral with aring nut 104 having a straddle orextension 105 to which aguide pin 106 is secured, the latter being downward facing and guided in abushing 107. Such a bushing is integral with a straddle orextension 108 of saidcolumn 101. Thus, saidshaft 102 can only move in vertical direction. - This
shaft 102 has secured thereon a gear wheel 108', one for eachchain 111. By means of axial andradial bearings 109, the shaft rotatably carries anarm 110 suitably provided with a bushing 112. For rotation ofarm 110, said bushing112 is connected byafurther arm 113 and articulatedjoint 114 to apneumatic jack 115, which is pivoted at 116 to asupport 117 integral withshaft 102, for example by saidarm 105. - At its free end, said
arm 110 has a bushing 118 rotatably carrying by axial and radial bearings 119 a unit for gripping therim pneumatic jack 120, thestem 121 of which extends in a bushing 123 having the jack cylinder connected thereto. - Secured to this bushing is a
gear wheel 122 on which saidchain 111 is entrained. Thus, said bushing 123andjack 120 are allowed to rotate about the vertical axis thereof. - A
platform 124 is secured to bushing 123 and has twosides 125 between which ablock 126 is slidably mounted. - A connecting
rod 127 is pivoted at 128 to said block and operates on apin 129 of alever 130 pivoted at 131 to saidsides 125. - The lever carries an
adjustable jaw 132 which, under the control of saidjack 120, clamps the rim against a pair of parallelhorizontal pins 133 projecting from thesides 125. Therefore, the described unloading unit can cause vertical displacements, horizontal rotations about two axes (that ofcolumn 101 and that of bushing 123) and closing and opening of the clamp gripping therim - In this example, the apparatus has eight operative units or stations I, II, III, IV, V, VI, VII and VIII, provided with abrading tools, such as grinding wheels, in the case of different granulation.
- The apparatus has a manual loading station K and an unloading station IX for the finished rim, at which the unloading device of Fig. 6,7 and 8 is arranged.
- For instance, assume that the rim section is that shown in Fig. 9.
- After rim loading at the station K by the operator, as described in connection with Figs. 6,7 and 8, the table carries such a rim in front of unit I, which is also shown in Fig. 2. The grinding wheel M of this unit rough-shapes the welding zone along the inner central portion of rim corresponding about to the section or length R-R' of Fig. 9.
- At the next unit or station II, the two grinding wheels rough- shape the sides R-R" and R'=R''' of the rim. Then, at unit or station III, the inclined grinding wheel therein located provides for rough-shaping of one half of the outer side or channel of the rim, that is the section or length a, while at the next unit or station IV the other half a' is rough-shaped.
- The unit or station V finishes the tips or crests P and Q outside of the rim. The unit or station VI is for prefinishing of the section or length R-R', and unit or station VII is for sides R"-R and R'-R"', and finally the unit or station VIII is for trimming the section or length R-R'. Unit or station IX is for unloading a finished rim as follows.
- Assume that the
unloading device 100 is at the retracted position shown by broken line in Fig. 1 and denoted at F. When said tablelstops, pressure fluid is supplied to thedouble acting jack 115, which causes thearm 110 to rotate to the position of Fig. 1, shown by full line, with thelever 130 moving thejaw 132 to open position (shown by broken line in Fig. 5). - Under these conditions, the rim zone B is between the
pins 133 andopen jaw 132. - The
jacks jaw 2f is lifted and leaves or releases therim jaw 132 is closed and lifted and the rim is thereby lifted from the twolower bearings 2d. Then, thejack 115 is reversely controlled,which causes thearm 110 to rotate to the position F of Fig. 1, and then thejack 103 is lowered andjaw 132 opens, whereby the r4m can be removed. The cycle is repeated with a new stop of the table.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT23770/83A IT1119701B (en) | 1983-11-18 | 1983-11-18 | EQUIPMENT FOR THE ABRASIVE PRODUCTION OF THE WELDING AREA OF THE RIMS OF THE BICYCLE AND MOTORCYCLE WHEELS |
IT2377083 | 1983-11-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0142655A2 true EP0142655A2 (en) | 1985-05-29 |
EP0142655A3 EP0142655A3 (en) | 1986-07-30 |
Family
ID=11209831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84110752A Withdrawn EP0142655A3 (en) | 1983-11-18 | 1984-09-08 | An apparatus for abrading machining of the welding zone for the rims of bicycle and motor vehicle wheels |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0142655A3 (en) |
JP (1) | JPS60114455A (en) |
IT (1) | IT1119701B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102430974A (en) * | 2011-12-26 | 2012-05-02 | 中信戴卡轮毂制造股份有限公司 | Aluminum wheel finishing process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107175568A (en) * | 2017-06-30 | 2017-09-19 | 清华大学 | Numerical control polishing multistation multiple clip rotary table and the lathe with it |
CN110561214B (en) * | 2019-09-12 | 2021-10-01 | 山东导航车轮有限公司 | Auxiliary tool based on rim deburring of polishing |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2252594A (en) * | 1940-05-01 | 1941-08-12 | Gustave A Carlson | Rotary work holding machine |
FR1368768A (en) * | 1963-04-02 | 1964-08-07 | Device for self-centering cylinders of various diameters | |
US3422583A (en) * | 1964-04-16 | 1969-01-21 | Cincinnati Milling Machine Co | Method for positioning a roll on a roll grinder |
DE2044806A1 (en) * | 1970-09-10 | 1972-03-16 | Koppers, Eduard, 4243 Isselburg; Gertzen, Josef, 4241 Empel; Landers, Bruno, 4243 Isselburg | Semi-automatic device for grinding and plastering |
DE2826209A1 (en) * | 1977-06-15 | 1979-03-01 | Famir Int Spa | Workpiece exchanger for two=stage roller bearing ring grinder - has common exchange unit for the two stages, using slide with two consecutive chambers |
-
1983
- 1983-11-18 IT IT23770/83A patent/IT1119701B/en active
-
1984
- 1984-05-30 JP JP59110651A patent/JPS60114455A/en active Pending
- 1984-09-08 EP EP84110752A patent/EP0142655A3/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2252594A (en) * | 1940-05-01 | 1941-08-12 | Gustave A Carlson | Rotary work holding machine |
FR1368768A (en) * | 1963-04-02 | 1964-08-07 | Device for self-centering cylinders of various diameters | |
US3422583A (en) * | 1964-04-16 | 1969-01-21 | Cincinnati Milling Machine Co | Method for positioning a roll on a roll grinder |
DE2044806A1 (en) * | 1970-09-10 | 1972-03-16 | Koppers, Eduard, 4243 Isselburg; Gertzen, Josef, 4241 Empel; Landers, Bruno, 4243 Isselburg | Semi-automatic device for grinding and plastering |
DE2826209A1 (en) * | 1977-06-15 | 1979-03-01 | Famir Int Spa | Workpiece exchanger for two=stage roller bearing ring grinder - has common exchange unit for the two stages, using slide with two consecutive chambers |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102430974A (en) * | 2011-12-26 | 2012-05-02 | 中信戴卡轮毂制造股份有限公司 | Aluminum wheel finishing process |
Also Published As
Publication number | Publication date |
---|---|
EP0142655A3 (en) | 1986-07-30 |
IT1119701B (en) | 1986-03-10 |
JPS60114455A (en) | 1985-06-20 |
IT8323770A0 (en) | 1983-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19840908 |
|
AK | Designated contracting states |
Designated state(s): BE DE FR GB |
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PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE DE FR GB |
|
17Q | First examination report despatched |
Effective date: 19870727 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19871208 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MUFFOLINI, GIANNINO |