JPH078103Y2 - Hand tool for scraping sliding surfaces - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a machining tool manually used for finishing a sliding surface of a machine tool, a measuring machine or the like into a highly accurate flat surface, and particularly to the sliding surface. The present invention relates to a hand tool for roughing machining used in the initial stage of the lapping work of the.

[Conventional technology]

Machine tools and measuring machines have many sliding members in order to cause relative movement between the components. The contact surface between these sliding members, that is, the sliding surface, needs to be finished with as large a contact area as possible, with even contact, and with a lubricating oil sump in order to improve the accuracy of relative movement. is there.

For this reason, normally, in the machine assembly process, the sliding surface of the mating side such as the table is manually finished by using the sliding surface of the bed or the like finished to the desired flatness by machining such as grinding as the reference surface. Matching is done. Recently, a resin material having a high wear resistance and lubricity such as ethylene tetrafluoride is often attached to the sliding surface of the mating side.

This sliding operation will be briefly described. Apply red Komeitan to the sliding surface to be finished, place it on the reference surface and press it against it to perform relative movement several times. Then, since the sliding surface comes into contact with the reference surface only at the convex portion, when both surfaces are separated and the sliding surface is observed, the Komeitan of that portion is peeled off and it is clearly distinguishable from other areas. This peeled off portion is referred to as "black contact". Therefore, a tool called a scraper shown in FIG. 7 is used while being held in hand, and the blade at the tip thereof is pressed against the sliding surface to move it, and the black portion is scraped by an appropriate amount. Then, the step of applying Komeitan to the sliding surface again, observing the contact of both surfaces, and scraping the black contact portion is repeated. Then, when the number of black hits per unit area reaches a predetermined value or more and is evenly distributed over the entire sliding surface, the lapping work is finished.

[Problems to be solved by the device]

This rubbing work requires physical strength and skill, and in order to finish the entire sliding surface, it is necessary to repeat ubiquitous work, which is time-consuming. As shown in FIG. 7, the cutting edge 11 of the scraper 10 is formed in an arc shape having a radius R of 200 mm to 300 mm, and in actuality, only a narrow range of the central portion 11a performs the shaving action. This is because even if the cutting blade 11 is accidentally tilted to the left or right during work, it is taken into consideration that the corners of the cutting blade 11 do not cut into the sliding surface and excessive cutting is performed. Therefore, since only the central portion a of the arcuate cutting edge 11 is cut, the amount of chips scraped at one time is small and the machining efficiency is poor.

In addition, it is necessary to form a proper recess for lubricating oil storage between both surfaces by sliding. It is necessary to make the number of these recesses a predetermined number per unit area, but in the work using the conventional scraping, there is a variation depending on the time even between workers or the work performed by the same worker, It was difficult to manage the number of oil sumps to some extent evenly. This can be solved by creating a solid contact condition where both sliding surfaces fit exactly, and then making recesses in an even arrangement using the scrapers shown in Fig. 7, but this contact condition is difficult. Due to that.

The present invention has been made to solve the above-mentioned problems of the prior art, and to improve the efficiency of the sliding work, to make it unskilled, and to ensure the uniform arrangement of the lubricating oil sump. An object is to provide a hand tool for shaving.

[Means for Solving the Problems]

The present invention has been made in view of the above-described object, and a holder is attached so that the rake angle of the sliding tool is negative, and the holder is manually pressed against the sliding surface to slide, thereby sliding. The surface is scraped off. More specifically, it is a hand tool for rough cutting used at the initial stage of sliding work of sliding surfaces, which slides in contact with the work surface of the work and gives a negative rake angle to the cutting edge. Thus, there is provided a hand tool for scraping a sliding surface, comprising: a holder for attaching a cutting tool; and a cutting tool mounting means for detachably fixing the cutting tool at a predetermined position of the holder.

[Action]

If you use a hand tool to carry out the lapping work and scrape away the strong hits, you will eventually obtain a solid hit condition where the sliding surfaces almost fit each other. The sliding surface can be finished by forming a recess for lubricating oil storage on the sliding surface thus obtained by using a scraper as shown in FIG.

〔Example〕

An embodiment of the hand tool for scraping the sliding surface will be described in more detail with reference to the drawings.

FIG. 1 is an overall perspective view of the hand tool of the present invention, which is composed of a rectangular parallelepiped metal holder 1 having a width × thickness × length of about 40 mm × 20 mm × 100 mm, and its lower surface is correct. If this hand tool is finished in a flat shape and pressed against the workpiece's sliding surface during work, the entire surface will contact the workpiece's sliding surface without rattling. It is configured as a work surface 2.

At the center of the holder 1, there is provided a slit-shaped opening 3 extending to the width holder and penetrating both upper and lower sides of the holder, and one wall surface thereof serves as a mounting surface 8 for the cutting tool 4. This mounting surface 8 is inclined at a constant angle with respect to the sliding surface to be processed, and the inclination direction is such that the cutting edge 4a at the tip of the cutting tool 4 is a negative rake with respect to the sliding surface to be processed during work. The direction is such that it acts at an angle θ (see FIG. 3). At the cutting point 4c of the cutting tool 4, a vertical line N is set up with respect to the sliding surface to be processed,
When the rake face 4d is formed from the vertical line N toward the movement direction side of the cutting tool 4, the rake angle θ becomes negative. If the rake face 4d is formed on the opposite side of the vertical line N standing at the cutting point 4c from the tool movement direction, the rake angle θ is positive. When the sliding surface made of a resin material such as ethylene tetrafluoride is to be lapped, the rake angle θ is preferably -30 to 10 degrees. When the rake angle θ is positive, the bite amount of the cutting edge becomes too large, and good sliding processing cannot be performed.

As shown in FIGS. 2 and 3, the cutting tool 4 is provided with a cutting blade 4a at its tip, and comprises a plate-shaped main body 4b having a width corresponding to the width of the opening 3, and the cutting tool 4 is provided along the cutting tool mounting surface 8 with the cutting tool 4a. It is inserted into the opening 3 and its cutting edge 4a is cut from the work surface 2 to a predetermined length (about 10 ~
20 μm) With the protrusion, it is firmly clamped by screwing a set bolt 6 through a screw hole 5 formed in the work surface 2 of the holder 1. The degree of protrusion of the cutting edge 4a can be appropriately adjusted according to the amount of the machining allowance of the surface to be processed. Fine adjustment screw 12
Is carried out by pushing the cutting tool 4 through the pushing metal fitting 13.

Between the other wall surface of the opening facing the cutting tool mounting surface 8 and the cutting tool 4, an escape groove 7 is formed for escaping the chips scraped from the surface to be processed by the cutting tool 4, so that chips generated during the work can be removed. Through this, the holder 1 is made to escape from the back surface to keep the surface to be processed clean.

One of the features of the present invention is that the cutting edge 4a of the cutting tool is sharpened linearly (R in FIG. 7 is infinite) unlike the case of the conventional scraping, and is used for grinding work over its entire width. It can be used. That is, since the cutting tool 4 is fixed on the firm holder 1 with a predetermined negative rake angle, and the work surface 2 and the work surface are in contact with each other and slide, the tool tilts and cuts due to operator's error. Since there is no accident that the corners of the blade 4a bite into the surface to be processed, it is not necessary to form the cutting edge into an arc shape as in the conventional case, and a straight blade can be used. Also, if cutting blades 4a are provided at four positions on the front and rear ends of the rectangular parallelepiped-shaped cutting tool body 4b (Fig. 3), when one cutting blade is worn, the front and back or top and bottom of the cutting tool are replaced and the holder 1 is replaced. By re-clamping, it is possible to easily replace with a new cutting edge.

As a result, even a beginner can perform the lapping work efficiently and without failure.

Another embodiment of the present invention will be described below with reference to another drawing. Throughout these figures and FIGS. 1 to 3 relating to the above-described first embodiment, the same parts are designated by the same reference numerals.

FIG. 4 shows a second embodiment of the present invention. In this example, in the holder 1, the side surface region is constituted only by the wall 9 on one side in the portion of the opening 3, and the other side is open. The cutting tool 4 is inserted into the opening 3 as in the previous example and is fixed by the clamping means including the set bolt 6 and the screw hole 5 having the same configuration as the previous one. Since the width of the cutting tool 4 is set to be the same as the width of the opening 3, the side surface on the open end side is completely coincident with the side surface of the holder 1. Therefore, the holder 1 can be ground on the surface to be processed without leaving a region corresponding to the side face, and therefore the tool of this embodiment can be suitably used when processing the endmost region of the sliding surface.

In the third embodiment shown in FIG. 5, the cutting tool 4 is the holder 1.
It is attached by a bracket 1a provided at the rear end and a set bolt 6, and it is convenient because chips escape to the rear side in the traveling direction of the tool.

In the fourth embodiment shown in FIG. 6, contrary to the above-mentioned example, the cutting tool 4 is attached by the bracket 1b provided at the front end of the holder 1 and the set bolt 6. In this case, it is necessary to provide the chip escape groove 7, but there is an advantage that the working posture is easy.

In the embodiment, the blade attachment surface 8 is formed in advance as a blade attachment means for the holder 1 so as to have a predetermined angle,
Although the blade 4 is pressed against the mounting surface 8 with the set bolt 6, the blade mounting angle can be adjusted so that the rake angle θ of the cutting blade can be varied between −30 and −10 degrees. Good.

[Effect of device]

As described above in detail, according to the hand tool of the present invention, it is possible to streamline the sliding work of sliding surfaces, which has been conventionally performed by using a scraper, so that even a beginner can perform a stable work. Can be expected. Further, adjustment of the machining allowance for the surface to be machined, which conventionally relies on the skill and intuition of the operator to adjust the force, can now be performed objectively and surely by adjusting the condition of the cutting edge from the holder. . As an example, the work that required 16 hours when using a conventional scraper was shortened to 12 hours by using the hand tool of the present invention.

Furthermore, since it is widely scraped, it is easy to obtain a solid contact condition where the entire surfaces of both sliding surfaces are almost exactly aligned. From this condition, if you use dents as shown in Fig. 7 to make dents at equal intervals, it is unskilled. It is possible for a person to form a lubricating oil reservoir with little variation. Due to such an effect, relative movement between the respective components such as the machine tool and the measuring machine is accurately performed, which contributes to the improvement of the accuracy of the machine.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a hand tool of the present invention, FIG. 2 is a side sectional view of the same, FIG. 3 is a perspective view of a cutting tool used in the present invention, and FIG. 4 is a second embodiment of the present invention. A general perspective view, FIG. 5 is a side view of the third embodiment, FIG. 6 is a side view of the fourth embodiment, and FIG. 7 is a side sectional view of a scraper used in a conventional laminating work. It is an expansion perspective view of a cutting edge. 1 ... Holder, 2 ... Work surface, 3 ... Opening, 4 ... Cutting tool, 4a ... Cutting blade, 4b ... Main body, 5 ... Screw hole, 6 ... Set bolt, 7 ... Relief groove, 8: Cutting tool mounting surface.

Claims (2)

[Scope of utility model registration request] 1. A hand tool for roughing used at the initial stage of sliding work of sliding surfaces, which slides in contact with a work surface of a work and gives a negative rake angle to a cutting edge. As described above, a hand tool for scraping a sliding surface, comprising: a holder for attaching the cutting tool, and a cutting tool mounting means for detachably fixing the cutting tool at a predetermined position of the holder. 2. The sliding surface shaving according to claim 1, wherein the holder is formed by providing an escape groove for chips generated from a surface to be processed between the holder and the rake surface of the cutting tool. Hand tools.