SU705747A1 - Jig bushing - Google Patents

Abstract

CONDUCTOR VNUZHA. for; drilling closely spaced holes, comprising a cylindrical body with a collar and a hole that is non-axial with the sleeve for guiding the tool, which is necessary in order to ensure the accuracy of the geometric parameters of the holes being machined on one circle concentric with the central hole of the workpiece, located at an angle o ^ to the axis of the central hole and intersecting with it and between themselves, the sleeve is provided with a guide shank intended to interact with the central hole TIFA workpiece, and the opening for guiding the tool in the housing formed by the shank and JOM Y ^ Y axis to vtul- • ki.,. §

Description

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Fig. 1 17 The invention relates to a machine tool, in particular, tools for drilling. A known conductor sleeve for drilling closely spaced holes, comprising a cylindrical body with a collar, in which there is a hole that is not aligned with the sleeve for guiding the tool. However, when drilling holes on a circle, this sleeve is concentric with respect to the central hole of the workpiece, intersecting both with the central hole and between each other and located at the same angle d to the center axis about a versti, does not provide the required accuracy of the geometric parameters of the holes. When making inclined holes intersecting with the central hole present in the part, a zone of intersection of the dark inclined hole with the having is formed. with the central, into which, the tool is subject to the action of the horizontal component force, fuss. inclined from the feed force directed towards the central hole, which leads to a significant withdrawal of the axis of the perfect hole. The aim of the invention is to ensure the accuracy of geometric pairs of holes to be machined, running on one circle concentric with the center hole of the workpiece, angled d to the axis of the central hole and intersecting it and between them. . For this, the sleeve is provided with a straight shank intended to interact with the central part from the workpiece version, and the hole for guiding the tool is made in the housing and the shank at an angle (/ to the axis of the sleeve. Figure 1 shows the described sleeve with the workpiece, extending straight Section 2 in Figure 2 is a diagram of the forces acting on the tool in the intersection zone of the central hole in the part and machining hole (node 1 in Figure 1); FIG. 5 shows sections A-A, B-B and B- In figure 1, the cylindrical housing 1 sleeve in Filled with the shoulder 2 and the guide Vostovik 3. In the body of the body 1 and the shank 3 there is a hole 4 in the direction of the tool 5, the axis of which makes an angle about the axis of the sleeve. At the end of the conductor sleeve facing the workpiece, 6, a recess 7 is made diameter D, covering the location of the holes to be machined on the end face of the part 6. The conductor sleeve is installed in the housing 8 by means of a key 9 and a locking screw (not shown in the drawing). Drilling holes using the proposed conductor sleeve is as follows. The conductor sleeve and the workpiece are aligned on the axis, with the part 6 installed: pour the central hole on the shank 3 and clamp the known means. The conductor sleeve ensures the direction of the cutting tool 5. not only in the drilling zone (Fig. 3), but also in the intersection zone of the inclined bore hole being made with the central hole in the section between the sections and B-B. During the drilling process in this area, the tool 5 is affected by the reaction from the cutting force N, which is expanded by the vector P, balanced by the feed force of the tool 5, and the vector P, balanced by the response of the guide sleeve 3 of the bushing sleeve, which prevents the tool from slipping. Thereby, the location of the hole being made relative to the axis of the central hole with a given degree of accuracy in angle d is achieved. Subsequent inclined holes are made similarly, turning the workpiece at a predetermined pitch, corresponding to the step of arranging the effective holes on a circle concentric with the central hole of the workpiece. Due to the undercut 7 on the conductor sleeve covering the location of all the holes being made, when the part 6 is rotated to the next position processing position of the next hole with a subsequent clamp, the part-based plane on the conductor sleeve along the end remains constant.

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Claims (1)

CONDUCTOR BUSHING, for drilling closely spaced holes, containing a cylindrical body with a shoulder and an off-center hole with a sleeve for guiding the tool ^ characterized in that, in order to ensure the accuracy of the geometric parameters of the machined holes located on one circle concentric with the central hole of the workpiece located at an angle d to the axis of the central hole and intersecting with each other, the sleeve is equipped with a guiding shank designed to interact I with the central hole of the workpiece, and the opening direction of the tool body and formed in the shank at an angle to the Y axis vtul-