Milling jig

Abstract

The utility model discloses a milling machine fixture. The milling machine fixture comprises a clamping sleeve and a positioning pin. When the square shaft section of the rod piece is machined, the first end of the rod piece is sleeved with the clamping sleeve, the clamping sleeve is rotated so that the positioning hole of the installation cylinder of the clamping sleeve can be aligned with the unthreaded hole of the first end of the rod piece, the positioning pin is inserted into the unthreaded hole of the rod piece through the positioning hole, the clamping sleeve and the rod piece are connected together at the moment, and the end, provided with the clamping sleeve, of the rod piece is clamped into a chuck of a milling machine; due to the fact that the first datum plane is arranged on the datum cylinder of the clamping sleeve and is perpendicular to the central axis of the positioning hole, the square shaft section can be accurately machined at the second end of the rod piece with the first datum plane as a reference. After the square shaft section is machined, the rod piece with the clamping sleeve is detached from the chuck of the milling machine, the positioning pin is detached, the clamping sleeve is removed, and rod piece machining can be completed. The milling jig is simple in structure, low in manufacturing cost, high in universality and capable of saving materials, shortening machining time, reducing cost and improving efficiency.

Description

Technical Field

[0001] This application relates to the field of machining tooling angle technology, and in particular to a milling machine fixture. Background Technology

[0002] In machining, there is a type of part called a rotating part, see reference. Figure 1 As shown, the rotating part is a rod 1, which has a first end and a second end. The first end of the rod 1 has an annular flange 101, and a rectangular groove 102 perpendicular to the central axis of the rod 1 is located on the side of the annular flange 101 away from the center of the rod 1. The middle part of the rectangular groove 102 has a light hole 103 perpendicular to the bottom of the groove. The second end of the rod 1 has a square shaft section 104 that shares the same central axis as the first end, and one side of the square shaft section 104 forms an angle of 45 degrees with the bottom of the rectangular groove 102. This part has machining requirements at both ends, as well as directional requirements. During machining, one end of the rod protrudes outside the three-jaw chuck, while the other end is mounted inside the three-jaw chuck of a four-axis machine tool, making its direction invisible. To ensure the machining direction requirements at both ends, the existing machining method involves leaving a process extension at the end of the rod that is mounted in the chuck, clamping the process extension with the three-jaw chuck, and exposing the directional and machining parts inside the three-jaw chuck. After machining, the process extension is then removed. This not only extends the machining process but also wastes materials, especially when the parts are produced in large batches and raw materials are expensive. The disadvantages of this machining method are particularly prominent. Utility Model Content

[0003] This application provides a milling machine fixture that can solve the technical problems of material waste and process extension caused by the need for process lengthening when machining some rotating parts in the prior art. The technical solution is as follows:

[0004] A milling machine fixture for assisting in the machining of the first and second ends of a rod.

[0005] The first end of the rod has an annular flange, and a rectangular groove perpendicular to the central axis of the rod is located on the side of the annular flange away from the center of the rod. The middle part of the rectangular groove has a light hole perpendicular to the bottom of the groove. The second end of the rod has a square shaft segment that shares the same central axis as the first end, and one side of the square shaft segment forms an angle of 45 degrees with the bottom of the rectangular groove.

[0006] The milling machine fixture includes a collet and a locating pin. The collet includes a reference cylinder and a mounting cylinder integrally connected and sharing a central axis. The outer surface of the reference cylinder has a first reference plane. The inner diameter of the mounting cylinder matches the diameter of the first end of the rod and has a radial locating hole. The central axis of the locating hole is perpendicular to the first reference plane. The locating pin includes an anti-rotation rod and a locating rod connected to one end of the anti-rotation rod. The outer diameter of the locating rod matches the aperture, and the diameter of the anti-rotation rod is larger than the diameter of the locating rod. When the mounting cylinder is fitted onto the first end of the rod, the locating rod is inserted into the aperture, and the anti-rotation rod is positioned in the locating hole.

[0007] Optionally, the reference cylinder has a first deformation groove extending axially, and the mounting cylinder has a second deformation groove extending axially, wherein the center plane of the first deformation groove and the center plane of the second deformation groove are coplanar.

[0008] Optionally, the inner diameter of the reference cylinder is larger than the outer diameter of the annular flange, the inner wall of the reference cylinder and the inner wall of the mounting cylinder form an inner step, and the distance between the stepped surface of the inner step and the central axis of the positioning hole is greater than the distance between the side of the annular flange near the optical hole and the central axis of the optical hole.

[0009] Optionally, the outer surface of the reference cylinder also has a second reference plane, and the second reference plane is parallel to the first reference plane.

[0010] Optionally, the outer surface of the reference cylinder also has a third reference plane and a fourth reference plane that are parallel to each other, and the third reference plane is perpendicular to the first reference plane.

[0011] Optionally, the anti-rotation rod and the positioning hole are fitted with a clearance, and the single-sided clearance between the anti-rotation rod and the positioning hole is 0.1-0.2mm.

[0012] Optionally, the outer surface of the anti-rotation rod has a taper that gradually decreases towards the diameter of the positioning rod.

[0013] Optionally, the mounting cylinder and the first end are clearance-fitted, and the single-sided clearance between the mounting cylinder and the first end is 0.1-0.2 mm.

[0014] Optionally, the width of the first deformation groove and the width of the second deformation groove are equal, and the width of both the first deformation groove and the width of the second deformation groove are ≥0.4mm.

[0015] The beneficial effects of the technical solutions provided in this application include at least the following:

[0016] A milling machine fixture for assisting in the machining of the aforementioned rods includes a collet and a locating pin. When machining the square shaft section of the rod, the collet is first placed on the first end of the rod. The collet is rotated so that the locating hole of the collet's mounting sleeve aligns with the open hole at the first end of the rod. The locating pin is then inserted into the open hole of the rod through the locating hole. At this point, the collet and the rod are connected. The end of the rod with the collet is clamped into the chuck of the milling machine. Since a first reference plane is provided on the reference sleeve, and this first reference plane is perpendicular to the central axis of the locating hole, the square shaft section can be accurately machined at the second end of the rod using the first reference plane as a reference. After the square shaft section is machined, the rod with the collet is removed from the chuck of the milling machine, the locating pin is removed, and the collet is removed, thus completing the machining of the square shaft section of the rod. The milling machine fixture of this application has a simple structure, low manufacturing cost, and strong versatility. It can also save materials, shorten machining time, reduce costs, and improve efficiency.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the finished rod;

[0020] Figure 2 This is a three-dimensional schematic diagram of the first perspective of the clamping sleeve in the milling machine fixture provided in the embodiments of this application;

[0021] Figure 3 This is a three-dimensional schematic diagram of the second perspective of the clamping sleeve in the milling machine fixture provided in the embodiments of this application;

[0022] Figure 4 This is a three-dimensional schematic diagram of the locating pin in the milling machine fixture provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the clamping of the milling machine fixture and the rod in the working state provided in the embodiments of this application;

[0024] Figure 6 yes Figure 5 A longitudinal sectional view.

[0025] Explanation of reference numerals in the attached figures

[0026] 1-Ring; 101-Annular flange; 102-Rectangular groove; 103-Smooth hole; 104-Square shaft section; 2-Cladle; 201-Reference cylinder; 2011-First reference plane; 2012-First deformation groove; 2013-Second reference plane; 2014-Third reference plane; 2015-Fourth reference plane; 202-Mounting cylinder; 2021-Positioning hole; 2022-Second deformation groove; 3-Positioning pin; 301-Anti-rotation rod; 302-Positioning rod. Detailed Implementation

[0027] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0028] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0029] refer to Figure 1 As shown, the rod 1 has a first end and a second end. The first end of the rod 1 has an annular flange 101, and a rectangular groove 102 perpendicular to the central axis of the rod 1 is located on the side of the annular flange 101 away from the center of the rod 1. The middle part of the rectangular groove 102 has a light hole 103 perpendicular to the bottom of the groove 102. The second end of the rod 1 has a square shaft section 104 that shares the same central axis as the first end, and one side of the square shaft section 104 forms an angle of 45 degrees with the bottom of the rectangular groove 102.

[0030] The aforementioned rod 1 is a rotating part. It has machining requirements at both ends and also directional requirements. During machining, one end of the part protrudes outside the three-jaw chuck, while the other end is mounted inside the three-jaw chuck of a four-axis machine tool, obscuring its direction. To ensure the directional requirements at both ends, the existing machining method involves leaving a process extension at the end of the part mounted in the chuck, clamping this extension with the three-jaw chuck, thus exposing the directional and machining areas to the chuck. After machining, the process extension is removed. This not only extends the machining process but also wastes materials, especially when parts are produced in large batches and raw materials are expensive. The disadvantages of this machining method are particularly prominent.

[0031] According to the embodiments of this application, refer to Figures 2 to 6As shown, a milling machine fixture for assisting in the machining of the aforementioned rod 1 is provided, the milling machine fixture comprising: a sleeve 2 and a locating pin 3.

[0032] refer to Figure 2 and Figure 3 As shown, the jacket 2 includes a reference cylinder 201 and a mounting cylinder 202 that are integrally connected and share a central axis. The outer surface of the reference cylinder 201 has a first reference plane 2011. The inner diameter of the mounting cylinder 202 matches the first end diameter of the rod 1 and has a radial positioning hole 2021. The central axis of the positioning hole 2021 is perpendicular to the first reference plane.

[0033] refer to Figure 4 As shown, the positioning pin 3 includes an anti-rotation rod 301 and a positioning rod 302 connected to one end of the anti-rotation rod 301. The outer diameter of the positioning rod 302 matches the light hole 103, and the diameter of the anti-rotation rod 301 is larger than the diameter of the positioning rod 302.

[0034] When the mounting cylinder 202 is fitted onto the first end of the rod 1, the positioning rod 302 is inserted into the light hole 103, and the anti-rotation rod 301 is located in the positioning hole 2021.

[0035] In the above embodiment, when machining the square shaft segment 104 of the rod 1, the clamping sleeve 2 is first placed on the first end of the rod 1. The clamping sleeve 2 is rotated so that the positioning hole 2021 of the mounting cylinder 202 of the clamping sleeve 2 is aligned with the light hole 103 at the first end of the rod 1. The positioning pin 3 is inserted into the light hole 103 of the rod 1 through the positioning hole 2021. At this time, the clamping sleeve 2 is connected to the rod 1. The end of the rod 1 with the clamping sleeve 2 is clamped in the chuck of the milling machine. Since the reference cylinder 201 of the clamping sleeve 2 is provided with a first reference plane 2011, and the first reference plane 2011 is perpendicular to the central axis of the positioning hole 2021, the square shaft segment 104 can be accurately machined at the second end of the rod 1 with the first reference plane 2011 as a reference. After the square shaft segment 104 is machined, the rod 1 with the clamping sleeve 2 is removed from the chuck of the milling machine, the positioning pin 3 is removed, and the clamping sleeve 2 is removed, thus completing the machining of the square shaft segment 104 of the rod 1. The milling machine fixture of this application has a simple structure, low manufacturing cost, and strong versatility. It can also save materials, shorten processing time, reduce costs, and improve efficiency.

[0036] According to the embodiments of this application, refer to Figure 3As shown, the reference cylinder 201 has a first deformation groove 2012 extending axially, and the mounting cylinder 202 has a second deformation groove 2022 extending axially, with the center surfaces of the first deformation groove 2012 and the second deformation groove 2022 being coplanar. By providing the first deformation groove 2012 in the reference cylinder 201 and the second deformation groove 2022 in the mounting cylinder 202, a certain deviation in the outer diameter of the rod 1 can be allowed, thereby facilitating the clamping of the rod 1. For rods 1 with a slightly larger first-end diameter, the reference cylinder 201 and the mounting cylinder 202 can slightly expand and deform to clamp the rod 1 due to the deformation grooves. For rods 1 with a slightly smaller first-end diameter, the rod 1 can also be clamped by compression deformation after the clamping sleeve 2 is clamped onto the three-jaw chuck.

[0037] According to the embodiments of this application, refer to Figure 3 and Figure 6 As shown, the inner diameter of the reference cylinder 201 is larger than the outer diameter of the annular flange 101. The inner wall of the reference cylinder 201 and the inner wall of the mounting cylinder 202 form an inner step, and the distance between the stepped surface of the inner step and the central axis of the positioning hole 2021 is greater than the distance between the side of the annular flange 101 near the light hole 103 and the central axis of the light hole 103. In this case, the inner step can serve as a coarse positioning for the clamp 2 to be fitted onto the first end of the rod 1. The design can satisfy the following: when the clamp 2 is installed, when the annular flange 101 at the first end of the rod 1 contacts the inner step of the clamp 2, the positioning hole 2021 of the clamp 2 is approximately aligned with the light hole 103 of the rod 1, which facilitates the insertion of the positioning pin 3 into the positioning hole 2021 and the light hole 103.

[0038] According to the embodiments of this application, refer to Figure 3 As shown, for ease of processing, the outer surface of the reference cylinder 201 also has a second reference plane 2013, and the second reference plane 2013 is parallel to the first reference plane 2011.

[0039] According to the embodiments of this application, refer to Figure 3 As shown, for ease of processing, the outer surface of the reference cylinder 201 also has a third reference plane 2014 and a fourth reference plane 2015 that are parallel to each other. The third reference plane 2014 is perpendicular to the first reference plane 2011.

[0040] According to the embodiments of this application, refer to Figures 1 to 5 As shown, the anti-rotation rod 301 and the positioning hole 2021 are fitted with a clearance, and the single-sided clearance between the anti-rotation rod 301 and the positioning hole 2021 is 0.1-0.2mm.

[0041] According to the embodiments of this application, refer to Figure 4 and Figure 6As shown, since the positioning pin 3 serves both to fix the clamp 2 and the rod 1, and to provide positioning, the mounting cylinder 202 is clearance-fitted with the first end, and the single-sided clearance between the mounting cylinder 202 and the first end is 0.1-0.2 mm. In other embodiments, to further improve positioning accuracy, the single-sided clearance between the mounting cylinder 202 and the first end can be even smaller.

[0042] According to one embodiment of this application, the outer surface of the anti-rotation rod 301 has a taper that gradually decreases towards the diameter of the positioning rod 302. Thus, when the positioning pin 3 is inserted into the optical hole 103, the anti-rotation rod 301 is pressed against the wall of the positioning hole 2021, and the anti-rotation rod 301 can adaptively position itself at the center of the positioning hole 2021, thereby improving positioning accuracy.

[0043] According to the embodiments of this application, refer to Figure 3 As shown, the width of the first deformation groove 2012 and the width of the second deformation groove 2022 are equal, and both the width of the first deformation groove 2012 and the width of the second deformation groove 2022 are ≥0.4mm. In the above embodiment, the width of the first deformation groove 2012 and the width of the second deformation groove 2022 cannot be too small. If they are too small, the groove walls of the deformation grooves will contact each other first during the clamping process of the rod 1, thus failing to clamp the rod 1.

[0044] refer to Figures 1 to 6 As shown below, the implementation principle of this application is explained through a specific processing procedure:

[0045] Step 1: First, process the rectangular groove 102 and the light hole 103 at the first end of the rod 1. Then, insert the first end of the rod 1 into the sleeve 2 so that the annular flange 101 of the rod 1 contacts the inner step of the sleeve 2. Rotate the sleeve 2 so that the positioning hole 2021 of the sleeve 2 and the light hole 103 of the rod 1 are aligned. Insert the positioning rod 302 of the positioning pin 3 into the light hole 103 of the rod 1.

[0046] Step 2: Install the sleeve 2 on the rod 1 into the three-jaw chuck of the four-axis machine tool, and use the first reference plane 2011, the second reference plane 2013, the third reference plane 2014 and the fourth reference plane 2015 on the sleeve 2 as positioning references for subsequent machining of the part.

[0047] Step 3: Clamp the three-jaw chuck and process the square shaft section 104 at the second end of the rod 1 by rotating the three-jaw chuck of the four-axis machine tool.

[0048] The milling machine fixture of this application has a simple structure, low manufacturing cost, and strong versatility, providing a strong guarantee for production and manufacturing. Moreover, it can save materials, shorten processing time, reduce costs, and improve efficiency for mass production of parts.

[0049] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0050] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0051] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A milling machine fixture for assisting in the machining of a first end and a second end of a rod (1), wherein the first end of the rod (1) has an annular flange (101), and a rectangular groove (102) perpendicular to the central axis of the rod (1) is located on the side of the annular flange (101) away from the center of the rod (1), the middle part of the rectangular groove (102) has a light hole (103) perpendicular to the bottom of the groove (102), and the second end of the rod (1) has a square shaft segment (104) sharing a central axis with the first end, and one side of the square shaft segment (104) forms an angle of 45 degrees with the bottom of the rectangular groove (102), characterized in that, The milling machine fixture includes: a collet (2) and a locating pin (3); The sleeve (2) includes a reference cylinder (201) and a mounting cylinder (202) that are integrally connected and share a central axis. The outer side of the reference cylinder (201) has a first reference plane (2011). The inner diameter of the mounting cylinder (202) matches the first end diameter of the rod (1) and has a radial positioning hole (2021). The central axis of the positioning hole (2021) is perpendicular to the first reference plane. The positioning pin (3) includes an anti-rotation rod (301) and a positioning rod (302) connected to one end of the anti-rotation rod (301). The outer diameter of the positioning rod (302) matches the light hole (103), and the diameter of the anti-rotation rod (301) is greater than the diameter of the positioning rod (302). When the mounting cylinder (202) is fitted onto the first end of the rod (1), the positioning rod (302) is inserted into the light hole (103), and the anti-rotation rod (301) is in the positioning hole (2021).

2. The milling machine fixture according to claim 1, characterized in that, The reference cylinder (201) has a first deformation groove (2012) extending along the axial direction, and the mounting cylinder (202) has a second deformation groove (2022) extending along the axial direction, and the center surface of the first deformation groove (2012) and the center surface of the second deformation groove (2022) are coplanar.

3. The milling machine fixture according to claim 2, characterized in that, The inner diameter of the reference cylinder (201) is larger than the outer diameter of the annular flange (101). The inner wall of the reference cylinder (201) and the inner wall of the mounting cylinder (202) form an inner step. The distance between the stepped surface of the inner step and the central axis of the positioning hole (2021) is greater than the distance between the side of the annular flange (101) near the light hole (103) and the central axis of the light hole (103).

4. The milling machine fixture according to claim 3, characterized in that, The outer surface of the reference cylinder (201) also has a second reference plane (2013), and the second reference plane (2013) is parallel to the first reference plane (2011).

5. The milling machine fixture according to claim 4, characterized in that, The outer surface of the reference cylinder (201) also has a third reference plane (2014) and a fourth reference plane (2015) that are parallel to each other, and the third reference plane (2014) is perpendicular to the first reference plane (2011).

6. The milling machine fixture according to claim 1, characterized in that, The anti-rotation rod (301) and the positioning hole (2021) are fitted with a clearance, and the single-sided clearance between the anti-rotation rod (301) and the positioning hole (2021) is 0.1-0.2mm.

7. The milling machine fixture according to claim 1, characterized in that, The outer surface of the anti-rotation rod (301) has a taper that gradually decreases in diameter toward the positioning rod (302).

8. The milling machine fixture according to claim 1, characterized in that, The mounting cylinder (202) is clearance-fitted with the first end, and the single-sided clearance between the mounting cylinder (202) and the first end is 0.1-0.2mm.

9. The milling machine fixture according to claim 2, characterized in that, The width of the first deformation groove (2012) is equal to the width of the second deformation groove (2022), and the width of both the first deformation groove (2012) and the second deformation groove (2022) is ≥0.4mm.

Images