Milling and drilling machine centering rod

Abstract

The invention provides a milling and drilling machine centering rod which comprises a clamping rod and a herringbone positioning plate, the herringbone positioning plate is rotatably installed at the non-clamping end of the clamping rod, the surface of the clamping rod is provided with indication scale marks parallel to the axis of the clamping rod, and the herringbone positioning plate is of a bilateral symmetry structure. A herringbone positioning plate which is of a left-right symmetrical structure is rotationally installed on a clamping rod, the end of the clamping rod is clamped on a chuck of a milling machine or a drilling machine during use, the herringbone plate is pushed to move on a workpiece in the x, y and z directions through operation of a hand wheel, and the workpiece can be accurately positioned by observing the position change of the herringbone plate on an indicating scale line. The position relation between the centering rod and the workpiece can be visually judged only by rotating the centering rod, then an operator can easily adjust a machine tool spindle to the position over the highest point of the rod, deviation caused by judgment only depending on hand feeling is avoided, and the positioning accuracy is improved; dependence on experience of operators is reduced, even green hands can master the using method quickly, positioning time is shortened, and machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining auxiliary tools, in particular to a milling and drilling centering rod. BACKGROUND

[0002] In the field of machining, especially in the process of drilling and milling machines, accurately determining the center position of the workpiece (centering) is the basic link to ensure the machining accuracy. Currently, there are three common centering methods. The first is the scratch centering method: the center position is marked on the surface of the workpiece by scratching, and the milling cutter is aligned with the scratch mark for processing. This method is simple to operate but has low precision, and is suitable for single-piece processing or scenarios with low precision requirements. The second is the trial cutting method: the workpiece surface is slightly cut, the cutting mark is observed to adjust the position, and the position is gradually positioned through multiple trial cutting. This method is flexible but has low efficiency, and is suitable for rough machining or equipment debugging stage. The third is the dial gauge centering method: the relative position of the workpiece axis and the milling cutter is measured by using the dial gauge, and the readings on both sides are made consistent by adjusting the workbench. This method has high precision but is complicated to operate, and is suitable for high-precision part processing.

[0003] For the machining of rod parts, the traditional centering method is complicated to operate and has low precision. It mainly relies on the contact of the tool symmetric structure with the high point of the workpiece to find the center. The finding process depends on manual visual sense and feeling, and the precision is greatly affected by the operation experience. Therefore, it is easy to have a deviation of more than ±0.1mm, and thus there is an urgent need to innovate the structure to improve the precision, efficiency and scene adaptability of the centering and finding. SUMMARY

[0004] The present application aims to provide a milling and drilling centering rod to solve the centering and positioning problem of rod workpieces in drilling and milling machines and other machining equipment.

[0005] In order to achieve the above purpose, the present application provides a milling and drilling centering rod, which comprises a clamping rod and an inverted V-shaped positioning plate. The inverted V-shaped positioning plate is rotatably installed at the non-clamping end of the clamping rod. The surface of the clamping rod is provided with an indicating scale line parallel to the axis thereof. The inverted V-shaped positioning plate has a left-right symmetrical structure.

[0006] Further, the inverted V-shaped positioning plate comprises a first fork plate, a second fork plate and a third fork plate. The included angle between the second fork plate and the first fork plate is the same as the included angle between the third fork plate and the first fork plate.

[0007] Further, the second fork plate and the third fork plate have the same length.

[0008] Further, the outer end portions of the first fork plate, the second fork plate and the third fork plate are all in the form of triangular pointer structures.

[0009] Further, the inverted V-shaped positioning plate and the clamping rod are both provided with connecting holes, and the inverted V-shaped positioning plate and the clamping rod are connected by bolts at the connecting holes.

[0010] Further, the herringbone positioning plate is slidably installed on the clamping rod through a rotating shaft.

[0011] Further, a waist-shaped adjusting hole is formed on the clamping rod, and the rotating shaft of the herringbone positioning plate is slidably installed in the waist-shaped adjusting hole.

[0012] Further, an abutting block abutting against the rotating shaft of the herringbone positioning plate is slidably installed in the waist-shaped adjusting hole, and a return spring is installed between the abutting block and the waist-shaped adjusting hole.

[0013] Further, the diameter of the rotating shaft of the herringbone positioning plate is the same as the width of the waist-shaped adjusting hole.

[0014] Further, the abutting block is provided with a circular-arc-shaped groove close to the side of the rotating shaft of the herringbone positioning plate.

[0015] The technical scheme of the present application is that the herringbone positioning plate in left-right symmetrical structure is rotatably installed on the clamping rod, the end of the clamping rod is clamped on the chuck of a milling machine or a drilling machine when used, the herringbone template is moved on the workpiece in x, y and z directions by operating a hand wheel, the positional relationship between the clamping rod and the workpiece can be directly judged by observing the position change of the herringbone template on the indicating scale line, and then the operator can easily adjust the main shaft of the machine tool to be directly above the highest point of the rod material, so as to avoid the deviation caused by relying on hand feeling for judgment, improve the positioning accuracy, reduce the dependence on the experience of the operator, even a novice can quickly master the use method, shorten the positioning time and improve the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a structural schematic diagram of the embodiment 1 of the present application.

[0018] Figure 2 It is a structural schematic diagram of the embodiment 2 of the present application.

[0019] Explanation of reference numerals: 1-clamping rod, 101-indicating scale line, 102-waist-shaped adjusting hole, 2-herringbone positioning plate, 201-first fork plate, 202-second fork plate, 203-third fork plate, 204-rotating shaft, 3-abutting block, 4-spring; DETAILED DESCRIPTION The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment 1 As Figure 1 shown, the present application provides a milling and drilling machine centering rod, which comprises a clamping rod and a herringbone positioning plate, the end of the clamping rod for cooperating with the chuck is in a cylindrical structure, the herringbone positioning plate is rotatably installed at the non-clamping end of the clamping rod, and the surface of the clamping rod is provided with an indicating scale line parallel to its axis, wherein: the herringbone positioning plate is a left-right symmetrical structure, comprising a first fork plate, a second fork plate and a third fork plate, the lengths of the second fork plate and the third fork plate are the same, and the included angle between the second fork plate and the first fork plate is the same as the included angle between the third fork plate and the first fork plate, the outer end of each of the first fork plate, the second fork plate and the third fork plate is a triangular pointer structure, so that the end points of the second fork plate and the third fork plate are in the same horizontal plane in the clamped state of the centering rod.

[0023] The connecting holes are arranged on the herringbone positioning plate and the clamping rod, the herringbone positioning plate and the clamping rod are connected through bolts at the connecting holes, the bolts are screwed into the rotating shaft of the herringbone positioning plate, and a certain gap should be reserved between the herringbone positioning plate and the clamping rod during connection, so that the herringbone positioning plate can rotate freely.

[0024] When the center positioning of the rod workpiece is performed by using the centering rod, the centering rod is installed on the spindle of the machine tool, the herringbone positioning plate is moved on the workpiece in the x, y and z directions by operating the hand wheel, and the position relationship between the centering rod and the workpiece can be intuitively judged by observing the position change of the first fork plate on the indicating scale on the herringbone positioning plate. When the pointer of the first fork plate moves to coincide with the indicating scale, it is indicated that the centering rod has been accurately positioned to the top end of the rod material, and the position coordinates can be recorded at this time.

[0025] Embodiment 2 As shown in Figure 2 Compared with embodiment 1, the difference of the present embodiment is that, in order to avoid rigid contact between the centering rod and the workpiece to be machined when the centering rod is adjusted in the x, y and z directions, causing damage to the centering rod and affecting the positioning effect in the later period, the herringbone positioning plate is slidably installed on the clamping rod through the rotating shaft, the clamping rod is provided with a waist-shaped adjusting hole, the rotating shaft of the herringbone positioning plate is slidably installed in the waist-shaped adjusting hole, and the diameter of the rotating shaft of the herringbone positioning plate is the same as the width of the waist-shaped adjusting hole, so that the herringbone positioning plate cannot move in the radial direction of the clamping rod.

[0026] In order to better fit the sliding herringbone positioning plate with the rod material during positioning, a abutting block abutting against the rotating shaft of the herringbone positioning plate is slidably installed in the waist-shaped adjusting hole, a return spring is installed between the abutting block and the waist-shaped adjusting hole, and an arc-shaped groove is arranged on the side of the abutting block close to the rotating shaft of the herringbone positioning plate.

[0027] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A centering bar for a milling and drilling machine, characterized in that, It includes a clamping rod and a herringbone positioning plate. The herringbone positioning plate is rotatably mounted on the non-clamping end of the clamping rod. The surface of the clamping rod is provided with indicator scale lines parallel to its axis. The herringbone positioning plate has a left-right symmetrical structure.

2. The centering bar for milling and drilling machines according to claim 1, characterized in that, The herringbone positioning plate includes a first fork plate, a second fork plate, and a third fork plate, wherein the angle between the second fork plate and the first fork plate and the angle between the third fork plate and the first fork plate are the same.

3. The centering bar for milling and drilling machines according to claim 2, characterized in that, The second fork plate has the same length as the third fork plate.

4. The centering bar for milling and drilling machines according to claim 2, characterized in that, The outer ends of the first fork, the second fork, and the third fork are all triangular pointer structures.

5. The centering bar for milling and drilling machines according to claim 1, characterized in that, Both the herringbone positioning plate and the clamping rod have connection holes, and the herringbone positioning plate and the clamping rod are connected at the connection holes by bolts.

6. The centering bar for milling and drilling machines according to claim 1, characterized in that, The herringbone positioning plate is slidably mounted on the clamping bar via a pivot.

7. The centering bar for milling and drilling machines according to claim 6, characterized in that, The clamping rod has a waist-shaped adjustment hole, and the rotating shaft of the herringbone positioning plate is slidably installed in the waist-shaped adjustment hole.

8. The centering bar for milling and drilling machines according to claim 7, characterized in that, An abutment block is slidably installed inside the waist-shaped adjustment hole, which abuts against the rotating shaft of the herringbone positioning plate, and a return spring is installed between the abutment block and the waist-shaped adjustment hole.

9. The centering bar for milling and drilling machines according to claim 7, characterized in that, The diameter of the pivot of the herringbone positioning plate is the same as the width of the waist-shaped adjustment hole.

10. The centering bar for milling and drilling machines according to claim 8, characterized in that, The abutment block has an arc-shaped groove on the side near the pivot of the herringbone positioning plate.

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