Assembly kit for upgrading an electrode grinding device and electrode grinding device

Patent metadata

Field	Value
Publication number	US-9227289-B2
Application number	US-201013514257-A
Country	US
Kind code	B2
Filing date	Oct 13, 2010
Priority date	Dec 10, 2009
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An assembly kit for upgrading a device for grinding welding electrodes with a grinding wheel driven by a driving motor with a shaft, which runs in a two-portion housing, wherein at least one opening is provided in the housing for guiding a welding electrode for grinding in a defined position relative to the grinding wheel, further characterized by a further grinding wheel, a spacer ring having a diameter corresponding to the diameter of the housing and a thickness corresponding to the thickness of the grinding wheel, and a centering sleeve with an axial length which is larger than the thickness of the grinding wheel.

First claim

What is claimed is:

1. An upgrade assembly kit for a known device for grinding welding electrodes, the known device having a length and comprising a grinding wheel having a thickness and a diameter and having a grinding surface directed in a first direction, a driving motor and a shaft for driving said grinding wheel in a rotational movement about a rotational axis, a two-portion housing said grinding wheel with a first housing portion and a second housing portion, wherein said first and said second housing portion are connected along a plane, and wherein said grinding wheel is rotated in the range of said plane inside said housing; and wherein openings are formed in said first and second housing portion of said two-portion housing for guiding a welding electrode for grinding in a defined angle and position relative to said grinding wheel, the openings in said first housing portion being angled towards said first grinding wheel, the upgrade assembly kit for coupling to the known device, and comprising:
a further grinding wheel adapted to be coupled to the device with the grinding surface directed in a second direction opposite to said first direction of said first grinding wheel, and wherein the openings in said second housing portion are angled towards said second grinding wheel;
a spacer ring adapted to be inserted between the first housing portion and the second housing portion, said spacer ring having a diameter corresponding to the diameter of said two-portion housing and a thickness corresponding to the thickness of said grinding wheel to increase said length of said known device by only said thickness of said further grinding wheel when the upgrade assembly kit is coupled, the thickness of the spacer ring thereby compensating for a difference of an axial position of said second grinding surface caused by the further grinding wheel relative to said openings for guiding a welding electrode in order to maintain the grinding angle defined by said openings in said second housing portion, wherein said further grinding wheel is adapted to rotate within said thickness of said spacer ring; and
a centering sleeve for centering said further grinding wheel to rotate about the same rotational axis as said grinding wheel, and wherein said centering sleeve has an axial length which is larger than said thickness of one of said grinding wheels.

2. The assembly kit of claim 1 for a device with a screw for screwing said grinding wheel to said shaft, the assembly kit further comprising a screw which is longer than the screw provided for the device with the grinding wheel.

3. The assembly kit according to claim 1 , and further comprising a housing portion which has at least one opening for guiding a welding electrode for grinding in a defined position relative to said grinding wheel or said further grinding wheel.

4. A device for grinding welding electrodes, the device comprising:
first and second grinding wheels each having a thickness and a diameter, the first grinding wheel having a grinding surface directed in a first direction and the second grinding wheel having a grinding surface directed in a second direction opposite to said first direction;
a driving motor and a shaft for driving said grinding wheels in a rotational movement about a common rotational axis;
a two-portion housing said grinding wheels with a first housing portion and a second housing portion, wherein at least one opening is formed in each of said first and second housing portions for guiding a welding electrode for grinding in a defined angle and position relative to one of said grinding wheels, and the at least one opening in said first housing portion is angled towards said first grinding wheel, and the at least one opening in said second housing portion is angled towards said second grinding wheel;
an upgraded element that includes one of said grinding wheels and a spacer ring with two sides each defining a plane, said spacer ring adapted to be inserted between the first housing portion and the second housing portion and having a diameter corresponding to the diameter of said two-portion housing and a thickness corresponding to the thickness of said grinding wheel to increase a length of a device to which the upgraded element is coupled by only said thickness of said second grinding wheel, the thickness of the spacer ring thereby compensating for a difference of an axial position of the grinding surface caused by the second grinding wheel relative to said openings for guiding a welding electrode in order to maintain the grinding angle defined by said openings in the two-portion housing,
wherein said first housing portion is connected to said spacer ring along a plane on a first side of said spacer ring and wherein said second housing portion is connected to said spacer ring along a plane on a second side of said spacer ring, and wherein a first grinding wheel is rotated in a common space in the range of said plane on said first side of said spacer ring and wherein a second grinding wheel is rotated in a common space in the range of said plane on said second side of said spacer ring; and
a centering sleeve for centering said further grinding wheel to rotate about the same axis as said grinding wheel, said centering sleeve having an axial length which is larger than said thickness of one of said grinding wheels.

5. The device of claim 4 , and wherein said grinding wheels are coated with grinding material having a grain size, said grain size being different for said first and second grinding wheel, and said opening in one of said housing portions is formed by bore holes having a diameter and an angle relative to one of said grinding wheels, and wherein said diameters are the same as the diameters in said at least one opening formed by bore holes in the other of said housing portions.

6. The device of claim 4 , and wherein one of said two grinding wheels is provided with a cutting edge outwardly projecting in a radial direction relative to said rotational axis.

7. The device of claim 4 , and wherein a rotating collision disk with an integrated sleeve is provided which is arranged between said housing portion at the motor side and said grinding wheels and which is form-fittingly connected to said shaft by said integrated sleeve.

8. The device of claim 7 , and further comprising a ring of soft material, in particular of felt fixed to one of said housing portions which is on the motor-side of said two-portion housing, said ring arranged around said sleeve of said collision disk.

Assignees

• Tamm Rolf
• Illinois Tool Works

Inventors

• Tamm Rolf

Classifications

• B23K35/402

  Non-consumable electrodes; C-electrodes · CPC title

• B23K11/3063

  Electrode maintenance, e.g. cleaning, grinding · CPC title

• B24B27/0076

  grinding machines comprising two or more grinding tools · CPC title

• B24B19/16 Primary

  for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli (grinding bevels on diamonds or sapphires B24B9/16; polishing of needles B24B29/08) · CPC title

• B24B41/066

  adapted for supporting work in the form of tools, e.g. drills · CPC title