US2047147A

US2047147A - Tool for dressing grinding-wheels

Info

Publication number: US2047147A
Application number: US39370A
Authority: US
Inventors: Frank E Koebel
Original assignee: JK Smit and Sons Inc
Current assignee: JK Smit and Sons Inc
Priority date: 1935-09-06
Filing date: 1935-09-06
Publication date: 1936-07-07
Anticipated expiration: 1953-07-07
Also published as: DE664778C

Description

F. E. KOEBEL TOOL FORDRESSING GRINDING WHEELS Jul 7, 1936.

Filed Sept. 6, 1955 'Invehtoh A o y-v,

Patented July 7, i936 UNITED STATES TOOL FOR DRESSING GRINDlNG-WHEELS Frank E; Koebel, Glen Ridge, N. J., assignor to J. K. Smit & Sons, Inc., New York. N. Y., a corporation of New York Application September 2 Claims.

This invention relates to a dressing tool carrying a diamond for truing the grinding wheels of various types of grinding machines. The object of the invention is to provide a free flow of cooling water supply immediately around the cutting point of the diamond and in the head in which, the diamond is set and the diamond base will also be cooled so that the life of the diamond will be .extended by preventing'it from becoming overheated during the wheel dressing or truing operation. Another object is to accomplish this with a water supply which is mounted independently of the'tool so that the tool will be free for adjustments, removal and interchange with other tools. Another object is to effect this cooling of both the point and the back of the diamond separately to each place by water which has not been used in cooling the other place. This makes it possible to utilize the water supply with which grinding machines" are usually provided for their regular grinding operations.

In the accompanying sheet of drawings which forms a part of this description,

Figure 1 shows in elevation a tool for dress- 25 ing grinding-wheels according to this invention with its head carrying a diamond partly in section, together with a portion of a wheel to be dressed and a nozzle from which cooling water is supplied.

Fig. 2 is an end view of the head.

- Fig. 3 is a section through the head on the line IIIIII of Fig. l.

Fig. 4 is a modified form partly in section.

Fig. 5 is a section through V-V of Fig. 4.

The tool as shown in Figs. 1,- 2, and 3 consists of a bar l preferably of round bar steel. At its end is ahead H in the end of which a diamond of tool with its head 35 the head on the line 40 I2 is firmly set. Four transverse holes or passageways 13 are drilled from the periphery of the head inclined to the axis of the bar so as to pass close to the diamond and meet behind the cup or cavity in which the diamond is set. The entrances to these holes are as close to the end.

of the'head as convenient and have beveled countersinks to afford funnel water inlets to whichever entrances are on the upper side. Additional 50 holes or passageways I4 are drilled from the end of the head close to the cup and meet the transverse holes. Water also circulates through these to cool further the part of the diamond that is embedded in the head. The circulation through the holes above the diamond will be from the end of the head to the transverse holes and in the holes below the diamond the circulatinn will be in the opposite direction..

6, 1935, Serial No. 39,370

In the modification shown in Figs. 4- and 5, with a head I6 for a differently shaped diamond ll there are three intersecting transverse holes 18 perpendicular to the axis and crossing at the back of the diamond.

It will be. seen from the two forms that the number, size and location of the holes will depend on the size and shape of the cup or cavity required to hold the diamond, the requirements being to provide as much cooling surface as possible close to the diamond setting and leave sufiicient metal for the rigid support of the diamond and connection with the bar.

' The tool when it is to be used is preferably mounted on a slide not shown so that it can be fed across the face. of the grinding wheel 2!] and take a cut of from one to three one-thousandths -of an inch with each revolution of the wheel. While the truing is in progress, water is discharged from a nozzle 2i. A fender 22 keeps the water from spattering backfrom where it is required. The stream is directed against the cutting point of the diamond and a portion is diverted and finds its way to the inlets to the pas-' sageways which adjoin the diamond setting.

It will be seen that the water which courses through the passageways and therefore has its temperature raised is not subsequently used to cool the diamond point, and also that the water which cools the point of the diamond is not subsequently used to cool the setting. Since the nozzle from which the water is discharged has no direct physical connection with the -tool, the machinist is in no way hampered inadjusting the position of the tool to present the cutting point of the diamond to its work to the best advantage, or in changing tools.

I claim,

1. A tool for dressing grinding-wheels comprising a diamond, and a head with the diamond set therein having passageways contiguous to the diamond with inlets and outlets the inlets being in the periphery thereof and positioned to receive a portion of a stream of cooling water directed against the diamond.

2. A mechanism for dressing grinding-wheels for a grinding machine having in combination a tool comprising a diamond, a head with the diamond set therein having passageways contiguous to the diamond with inlets and outlets, the inlets being in the periphery thereof and positioned to receive a portion of a stream of cool- ,ing water when it. is directed against the diamond, and a nozzle independent of direct connection with the tool for directing the water stream.

FRANK E. KOEBEL.