JPH046286A - Method for working rod - Google Patents

Abstract

PURPOSE:To easily work patterns of shallow grooves even on the surface of a heavy, long or bent rod with high accuracy by susbjecting the surface of the metallic rod to dissolving by etching in place of machining at the time of working patterned grooves on the surface of a metallic rod. CONSTITUTION:A photoresist film 2 is applied on the surface of, for example, the rod 1 and the parts of codes 4 exclusive of parts 3 of the necessary patterns are cured by exposing. This rod is washed to wash away the nonphotosensitive films 3 to the state like parts 5. The parts 5 are then chemically polished to obtain the desired shallow grooves 6. The extremely shallow patterns or grooves are formed with high accuracy on the surface of the heavy, long or bent rod with which the formation of such patterns by machining is heretofore difficult.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention belongs to the field of metal processing and relates to surface processing of metal rods, in which grooves are processed on the surface of metal rods to improve the appearance of the rods of industrial machines. It is particularly effective when used to process patterns (various shapes such as circular and linear grooves) used for position marks, scales, decorations, etc.

(Prior Art) Conventionally, machining (turning or milling) is used to create patterns or grooves on the surface of metal rods.

(Problems to be Solved by the Invention) Usually 1. The rod has a bend, and the bend increases when heat treatment or the like is applied.

In addition, rods are not necessarily perfectly circular, but may be elliptical or eccentric, so the conventional processing methods described above cannot process such rods or heavy wands. Long rods were difficult to machine, and the groove depth was uniform, making it difficult to achieve precision and making them expensive.

(Means and effects for solving the problem) This invention was made to solve the above problem, and it is possible to create a film on the surface of the rod by photoresist, tape masking, or screen printing to create the necessary shape. Then, the coating is removed from the portions of the rod surface where a pattern is required in the desired shape, or the desired shape is left and printed.

Next, by dissolving the uncoated portion of the rod by chemical polishing or etching, very shallow grooves with the required pattern can be created.

The above-mentioned photoresist refers to a substance that exhibits chemical resistance, particularly an insoluble hard film, when exposed to light, and a film containing dichromic acid, diazo compound, etc. in gelatin or polyvinyl alcohol is used.

Tape masking involves wrapping a surface with a tape made of a material that cannot be removed by etching.

Screen printing is printing a photolithography screen on the surface.

(Example) Next, embodiments of the present invention will be described based on the drawings.

Figures 1 (a) to (d) are based on the photoresist method, in which a photoresist coating 2 is applied to the surface of the rod 1, and the area 4 other than the required pattern area 3 is exposed to light and cured. 3. Next, the opening and opening 2 are washed and the unexposed film 3 is washed off, resulting in a part like the part 5 shown in FIG. 1(c).

Next, when the portion 5 from which the coating has been washed off is chemically polished, a desired shallow groove is created on the rod surface, as shown by 6 in FIG. 1(d).

2(A) to 2(C) are based on the tape masking method, in which a masking tape 22 is wrapped around the surface of a rod 21, and the necessary patterned portion shown by reference numeral 23 in FIG. 2(0) is cut with a cutter. After removal, the rod surface from which the tape has been removed is chemically polished to form a desired shallow groove on the rod surface, as shown at 24 in FIG. 2(c).

Finally, remove the remaining masking tape to complete the process.

FIGS. 3A and 3B show the screen printing method, in which screen printing is performed on the surface of the rod 31, except for necessary patterns, as shown by reference numeral 32.

Reference numeral 33 indicates a portion that is not screen printed.

Next, as shown by reference numeral 34 in FIG. 3(b), desired shallow grooves are formed on the surface of the lower 1 by chemical polishing in the areas where screen printing is not performed.

The process is completed by peeling off the remaining screen.

(Effects of the Invention) Since the present invention is constructed as detailed above, it is easy to process extremely shallow patterns and grooves on the surfaces of heavy rods and long, curved rods, which were difficult with conventional machining. This has the great effect of being able to be implemented with high precision and at low cost.

[Brief explanation of drawings]

Figures 1 (a) to (d) show the loft processing method using the photoresist method, and Figures 2 (a) to (c) show the rod processing method using the tape masking method. U
) shows the opening and closing method using screen printing method 1. 1, 21.31... Rod 2... Photoresist coating 22... Masking tape 33... Screen printed portion.

Claims (1)

[Claims] When machining patterned grooves on the rod surface, the parts other than the shape to be grooved are coated with a coating, and the uncoated surface of the rod is melt-processed by chemical polishing or etching to create a very shallow groove pattern on the rod. A method of processing a rod surface, which is characterized by forming a surface.