APPARATUS FOR WELDING BRAKE SHOES

• US 3,665,146 A
• Filed: 01/23/1970
• Issued: 05/23/1972
• Est. Priority Date: 01/23/1970
• Status: Expired due to Term

• Current Assignee: Barney R. Powell, Fred Paul, Thomas B. Morris
• Original Assignee: Barney R. Powell, Fred Paul, Thomas B. Morris
• Inventors: Morris, Thomas B., Paul, Fred, Powell, Barney R.
• Primary Examiner(s): Truhe, J. V.
• Assistant Examiner(s): Smith, J. G.
• Application Number:
  US05/005,199
• Time in Patent Office: 851 Days
• Field of Search: 219/124,127,131,159,107,91 29/44,48 228/44,47,49
• US Class Current: 219/124.4
• CPC Class Codes: B23K 9/0026 specially adapted for particular articles or work
• CPC Class Codes: F16D 69/0416 specially adapted for curved linings

Abstract

An apparatus for welding the table section of a brake shoe to a pair of rib sections thereof including a frame assembly, support means mounted on the frame assembly, the support means having means for detachably mounting the rib sections in spaced, parallel relation thereon, the support means having means for detachably mounting the table section on the rib sections, welding means mounted on the frame assembly, directed toward selected adjacent portions of the table and rib sections mounted on the support means, means for advancing the support means along a predetermined line of travel whereby the welding means is directed toward the selected portions of the table and rib sections, and means for energizing the welding means to weld the table and rib sections together.

Claims

1. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, comprising a frame assembly, a rotatable support means mounted on said frame assembly, first means mounted on said rotatable support for rotation therewith for detachably mounting said rib sections in spaced, paralLel relation on said support means whereby the spacing of said rib sections substantially is similar to the spacing between the openings in said table section and the outer edges of said rib section substantially lie in a cylindrical plane disposed coaxially with the axis of rotation of said support member, second means mounted on said support means for rotation therewith for detachably mounting said table section on the outer edges of said rib sections with the openings therein registered with the outer edges of said rib members, stationary welding means, independent of said first and second detachable mounting means, mounted on said frame assembly, means for indexing said support means to successively register said openings in said table section with said welding means and means for energizing said welding means when said openings in said table section are registered therewith to plug weld said table section to said rib sections.

2. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 1, wherein said means for detachably mounting said table and rib sections comprise clamping means.

3. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 2, wherein said clamping means are operated by fluid cylinder assemblies.

4. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 1, wherein said support means includes abutment surfaces for positioning said rib sections and said table sections, and said means for detachably mounting said table and rib sections comprise clamping means.

5. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, comprising a frame assembly, a rotatable support means mounted on said frame assembly, having first and second work stations disposed on diametrically opposite sides thereof, each work station including first means mounted thereon for rotation therewith, having rib section engaging means movable in at least one plane passing through the axis of rotation of said rotatable support means, for detachably mounting said rib sections in spaced, parallel relation on said support means whereby the spacing of said rib sections substantially is similar to the spacing between the openings in said table section and the outer edges of said rib sections substantially lie in a cylindrical plane disposed coaxially with the axis of rotation of said support member, and second means mounted thereon for rotation therewith, having table section engaging means movable in at least one plane passing through the axis of rotation of said rotatable support means, for detachably mounting said table section on the outer edges of said rib sections with the openings therein registered with the outer edges of said rib members, stationary welding means, independent of said first and second detachable mounting means, mounted on said frame assembly, means for indexing said support means about its axis of rotation to successively register said openings in said table section with said welding means and means for energizing said welding means when said openings in said table section are registered therewith to plug weld said table section to said rib sections.

6. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 5, wherein said means for detachably securiNg said table and rib sections at one of said work stations, are activated while the means of the other work station for detachably securing said rib and table sections is correspondingly deactivated.

7. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 5, wherein said means for detachably securing said rib sections at one of said work stations is operable while the means for detachably securing the rib sections at the other of said work stations correspondingly is inoperable, and said means for detachably mounting said table section at said one work station is operable while the means for detachably mounting a table section at said other work station correspondingly is inoperable.

8. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 5, wherein said means for detachably mounting said table and rib sections comprise clamping means.

9. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 5, wherein said support means includes abutment surfaces for positioning said rib sections and said table sections and said means for detachably mounting said table and rib sections comprise clamping means.

10. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, comprising a frame assembly, a spindle rotatably mounted on said frame assembly, a mounting head assembly rigidly mounted on said spindle for rotation therewith, said mounting head assembly including at least one work station having a first set of abutment surfaces for mounting said rib sections in spaced parallel planes disposed normal to the axis of rotation of said spindle, with the outer edges thereof lying in a cylindrical plane disposed coaxially relative to the axis of said spindle, and a second set of abutment surfaces for mounting said table section on the outer arcuate edges of said rib sections with the sets of openings in said table section registered with the outer arcuate edges of said rib sections, said mounting head assembly having abutment surfaces for longitudinally aligning said rib and table sections, first means mounted on said mounting head assembly for rotation therewith for retaining said rib sections in engagement with said first set of abutment surfaces, each of said first retaining means having rib section engaging members disposed along an arc less than 360*, second means mounted on said mounting head assembly for rotation therewith for retaining said table section in engagement with said second abutment surfaces, each of said second retaining means having table section engaging members disposed along an arc less than 360*, a pair of stationary welding guns, independent of said first and second retaining means, disposed in planes including said rib sections positioned on said first set of abutment surfaces, means mounted on said frame assembly for indexing said spindle and mounting head assembly about the axis thereof to successively register openings in said table section with said welding guns, and means for energizing said welding guns upon registry of said openings in said table section with said welding guns to plug weld said table section to said rib sections.

11. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges according to claim 10, wherein said mounting hEad assembly includes first and second work stations disposed on diametrically opposed sides thereof.

12. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 11, wherein said means for retaining said table and rib sections at one of said work stations, are activated while the means for retaining said table and rib sections at the other work station, correspondingly is deactivated.

13. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections, having arcuate outer edges, according to claim 11, wherein said means for retaining said rib sections at one of said work stations is operable while the means for retaining said rib sections at the other of said work stations correspondingly is inoperable, and said means for retaining said table section at said one work station is operable while the means for retaining a table section at said other work station correspondingly is inoperable.

14. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 10, wherein said means for retaining said table and rib sections comprise clamping means.

15. An apparatus for welding an arcuately shaped table section of a brake shoe, having spaced parallel sets of openings along the length thereof, to a pair of rib sections thereof, having arcuate outer edges, according to claim 10, wherein said means for retaining said table section comprises sets of clamping members engageable with the side portions of said table section to clamp said table section into firm engagement with said second set of abutment surfaces.