A boring jig

Abstract

The utility model relates to mechanical processing technical field discloses a kind of boring tool jigs, the boring tool jig includes limiting mechanism, clamp cover, locking piece and boring chuck, limiting mechanism is provided with first recess, the side wall of first recess is provided with limiting protrusion, clamp cover and limiting mechanism gap cooperation, the circumferential side of clamp cover is provided with limiting recess, limiting protrusion partially extends into limiting recess, the inside of clamp cover is provided with tapered through-hole, locking piece is arranged in first recess, the upper end surface of locking piece and the lower end surface of clamp cover contact, the lower end surface of locking piece and the groove bottom of first recess contact, boring chuck is arranged in tapered through-hole, the lower end of boring chuck is connected with locking piece, boring chuck is provided with workpiece placement through slot. It can lock workpiece and carry out automatic alignment during boring process, improve the machining accuracy of workpiece, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a boring tool. Background Technology

[0002] After heat treatment, small workpieces often require boring to achieve higher precision in their inner holes. However, for high-precision or high-roughness workpieces, traditional boring can easily lead to inner hole eccentricity, resulting in low workpiece yield, assembly difficulties, and decreased performance. Current technology often uses floating boring tools to improve the machining accuracy and consistency of inner holes. However, for cylindrical workpieces, directly using a floating boring tool with conventional fixtures can lead to either workpiece rotation or displacement relative to the boring bar due to cutting forces, affecting machining accuracy, or excessive clamping affecting the workpiece's shape. Furthermore, the cost of using floating boring tools is relatively high, making it economically unfeasible for mass production. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a boring fixture that can lock the workpiece and automatically guide it during the boring process, thereby improving the machining accuracy of the workpiece and reducing costs.

[0004] A boring fixture according to an embodiment of the present invention includes: The limiting mechanism has a first groove, and the side wall of the first groove is provided with a limiting protrusion; A sleeve is provided, which is in clearance fit with the limiting mechanism. A limiting groove is provided on the periphery of the sleeve, and the limiting protrusion extends partially into the limiting groove. A tapered through hole is provided on the inner side of the sleeve. A locking element is disposed in the first groove, the upper end face of the locking element is in contact with the lower end face of the clamp, and the lower end face of the locking element is in contact with the bottom of the first groove. A boring chuck is inserted into the tapered through hole, and the lower end of the boring chuck is connected to the locking member. The boring chuck has a workpiece placement slot.

[0005] According to some embodiments of the present invention, the tapered through hole includes a first tapered section at the upper part and a first straight cylindrical section at the lower part, the boring chuck includes a second tapered section and a second straight cylindrical section, the first tapered section and the second tapered section are adapted to each other, the second straight cylindrical section passes through the first straight cylindrical section, and the tail end of the second straight cylindrical section is connected to the locking member.

[0006] According to some embodiments of the present invention, at least one second through groove is provided on the periphery of the boring chuck, the second through groove penetrates a partial sidewall of the workpiece placement through groove and extends to the upper end slot of the workpiece placement through groove.

[0007] According to some embodiments of the present invention, the bottom of the second through groove is spherical.

[0008] According to some embodiments of the present invention, the workpiece placement channel includes a placement section and a chip removal section, wherein the placement section is suitable for placing workpieces.

[0009] According to some embodiments of the present invention, the limiting mechanism includes a positioning plate and a pad connected vertically, the positioning plate and the pad forming the first groove.

[0010] According to some embodiments of the present invention, the bottom partial surface of the pad is recessed to form at least one third through groove, the third through groove extending from the first side to the second side of the pad.

[0011] According to some embodiments of this utility model, the pad is provided with a fourth through groove, the locking member is provided with a threaded through hole, the lower end of the boring chuck is connected to the threaded through hole, and the opening of the fourth through groove is opposite to the workpiece placement through groove.

[0012] According to some embodiments of the present invention, a positioning mechanism is also included. The positioning mechanism has a second groove and a first through groove. The second groove is set at an angle to the central axis of the first through groove. The opening of the workpiece placement through groove is opposite to the opening of the first through groove. The opening of the first through groove is smaller than the opening of the workpiece placement through groove.

[0013] According to some embodiments of the present invention, the positioning mechanism includes a left back plate, a right back plate, a positioning back plate, and an upper baffle. The left back plate, the right back plate, the positioning back plate, and the upper baffle form a second groove. The first through groove is disposed on the upper baffle. The left back plate, the right back plate, and the positioning back plate are in contact with the limiting mechanism.

[0014] The embodiments of this utility model have at least the following beneficial effects: By tightening the locking mechanism, the collet is forced upwards. The collet, with its tapered through-hole structure, securely locks the boring chuck and workpiece into a single unit, ensuring that the workpiece will not shift relative to the collet during subsequent machining. This allows the entire fixed unit, consisting of the workpiece, collet, and boring chuck, to make slight floating and adaptive adjustments under the cutting force, thanks to the clearance fit between the collet and the limiting structure, until the axis of the workpiece's inner hole is precisely aligned with the axis of rotation of the boring tool, completing automatic alignment. At this point, the limiting groove and limiting protrusion contact each other, working together with the boring tool to fix the workpiece, enabling precise machining of the workpiece's inner hole without the need for a floating boring tool, thus reducing machining costs.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a front and rear sectional view of the boring fixture according to an embodiment of the present utility model; Figure 2 This is a top view of the limiting mechanism of the boring machine fixture according to an embodiment of the present utility model; Figure 3 This is a top view of the clamping sleeve of the boring tool according to an embodiment of the present utility model; Figure 4 for Figure 1 An exploded cross-sectional view of the front and rear directions of the clamping sleeve and boring chuck of the boring tool is shown. Figure 5 This is a top view of the boring chuck of the boring machine fixture according to an embodiment of the present utility model; Figure 6 This is a left-right sectional view of the boring fixture according to an embodiment of the present utility model.

[0017] Figure label: Limiting mechanism 100, first groove 110, limiting protrusion 111, positioning plate 120, pad 130, third through groove 131, fourth through groove 132. Jacket 200, limiting groove 210, tapered through hole 220, first tapered section 221, first straight section 222 Locking component 300, threaded through hole 310, Boring chuck 400, workpiece placement slot 410, placement section 411, chip removal section 412, second conical section 420, second straight section 430, second through slot 440 Positioning mechanism 500, second groove 510, first through groove 551, left support plate 520, right support plate 530, positioning support plate 540, upper baffle 550. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "bottom," and "inner," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "several" means two or more.

[0020] In the description of this utility model, unless otherwise explicitly defined, the terms "setting", "installing", "connecting", "linking", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0021] The following is as follows Figures 1 to 6 This invention describes a boring tool according to an embodiment of the present invention.

[0022] like Figure 1 , Figure 2 and Figure 3As shown, a boring jig according to an embodiment of the present invention includes a limiting mechanism 100, a sleeve 200, a locking member 300, and a boring chuck 400. The limiting mechanism 100 has a first groove 110, and the side wall of the first groove 110 is provided with a limiting protrusion 111. The sleeve 200 is clearance-fitted with the limiting mechanism 100, and a limiting groove 210 is provided on the periphery of the sleeve 200. The limiting protrusion 111 partially extends into the limiting groove 210. Inside the 10, a tapered through hole 220 is provided on the inner side of the sleeve 200. The locking member 300 is provided in the first groove 110. The upper end face of the locking member 300 is in contact with the lower end face of the sleeve 200, and the lower end face of the locking member 300 is in contact with the bottom of the groove 110. The boring chuck 400 is inserted in the tapered through hole 220. The lower end of the boring chuck 400 is in contact with the locking member 300. The boring chuck 400 has a workpiece placement through groove 410.

[0023] When using the fixture, first rotate the locking member 300 downwards to loosen the clamping state of the sleeve 200 on the boring chuck 400. Then, place the workpiece into the workpiece placement slot 410 in the boring chuck 400. Rotate the locking member 300 upwards so that the locking member 300 can press the sleeve 200 upwards. The sleeve 200 can shrink the tapered through hole 220 towards the central axis, thereby clamping the boring chuck 400. The boring chuck 400 further presses the workpiece in the workpiece placement slot 410 towards the central axis, thereby achieving reliable clamping of the workpiece without damaging the outer surface of the cylindrical workpiece. After the workpiece is stably clamped, place the stable whole formed by the sleeve 200, locking member 300, boring chuck 400 and workpiece into the first groove 110 of the limiting mechanism 100, wherein the limiting groove 210 is located within the limiting protrusion 111. After being placed stably, the boring bar enters the workpiece and contacts the workpiece's machining hole. During the contact between the workpiece and the boring bar, because the central axis of the boring bar's rotation is not aligned with the central axis of the workpiece's machining hole, the boring bar will cause the workpiece, boring chuck 400, locking element 300, and collet 200 to undergo a slight floating displacement in the first groove 110 of the limiting mechanism 100 to achieve automatic centering. Ultimately, the central axis of the boring bar's rotation is aligned with the central axis of the workpiece's machining hole. After alignment, the limiting groove 210 contacts the side wall of the limiting protrusion 111. The side wall of the limiting protrusion 111 and the boring bar (or machine tool spindle) together constrain the movement of the collet 200, locking element 300, boring chuck 400, and workpiece in the horizontal plane, which can effectively improve the machining accuracy.

[0024] It is understandable that when a workpiece is placed in the workpiece placement slot 410, the hole that needs to be machined on the workpiece is exposed. When the workpiece is machined into a through hole, the machined hole on the workpiece is connected to the workpiece placement slot 410.

[0025] It is understandable that the clearance between the limiting mechanism 100 and the collet 200 should be greater than the initial offset distance between the rotation center axis of the boring tool and the center axis of the workpiece machining hole installed in the boring chuck.

[0026] Understandably, the boring chuck 400 and the locking member 300 can be connected by threads. Furthermore, during workpiece machining, the rotation direction of the boring bar is opposite to the threaded connection direction between the locking member 300 and the boring chuck 400. This prevents the locking member 300 and the boring chuck 400 from loosening during machining rotation. Because the rotation direction of the boring bar is opposite to the loosening direction of the locking thread, the machining torque actually makes the connection even tighter, thus achieving better clamping of the workpiece. The boring chuck 400 and the locking member 300 can also be connected by a locking buckle. A protrusion (not shown in the figure) or a groove (not shown in the figure) is provided at the lower end of the boring chuck 400 to match the groove (not shown in the figure) or protrusion (not shown in the figure) provided on the locking member 300. This allows the boring chuck 400 to press the sleeve 200 upward when it is connected to the locking member 300, so that the sleeve 200 can clamp the boring chuck 400 and thus the boring chuck 400 clamps the workpiece.

[0027] It is understandable that a limiting groove can be provided on the sleeve 200, and a limiting protrusion can be provided on the limiting structure 100.

[0028] In some specific embodiments of this utility model, the tapered through hole 220 includes a first tapered section 221 located at the upper part and a first straight cylindrical section 222 located at the lower part. The boring chuck 400 includes a second tapered section 420 and a second straight cylindrical section 430. The first tapered section 221 is adapted to the second tapered section 420. The second straight cylindrical section 430 passes through the first straight cylindrical section 222. The tail end of the second straight cylindrical section 430 is connected to the locking member 300.

[0029] like Figure 4 As shown, in this embodiment, the first conical segment 221 can be adapted to the second conical segment 420, thereby converting the upward extrusion force into pressure perpendicular to the surface of the second conical segment 420, thus achieving the clamping of the workpiece by the second conical segment 420. The second straight cylindrical segment 430 is adapted to the first straight cylindrical segment 222, and the first straight cylindrical segment 222 provides an extension channel for the second straight cylindrical segment 430, so that the second straight cylindrical segment 430 can be connected to the locking member 300 located at the lower end of the clamp 200, and so that the locking member 300 can press the clamp upward.

[0030] It is understandable that the tapered through hole 220 and the boring chuck 400 can also be equipped with multiple tapered sections with different inclination angles, so as to achieve better transmission and control of clamping force on the workpiece.

[0031] In some specific embodiments of this utility model, at least one second through groove 440 is provided on the periphery of the boring chuck 400. The second through groove 440 penetrates a partial sidewall of the workpiece placement through groove 410 and extends to the upper end of the workpiece placement through groove 410.

[0032] like Figure 4 and Figure 5 As shown, in this embodiment, four second through slots 440 are provided. The four second through slots 440 divide the body of the boring chuck 400 into four elastic arms. The second through slots 440 can facilitate the elastic deformation of the boring chuck 400 towards the central axis, thereby better clamping the workpiece.

[0033] Understandably, the number of second through slots 440 should be set according to the overall size of the boring chuck 400, and can be two, three or five.

[0034] In some specific embodiments of this utility model, the bottom of the second through groove 440 is spherical. As shown in Figure 4, in this embodiment, it can be understood that the structural design of the spherical groove can effectively alleviate stress concentration and prevent the boring chuck 400 from breaking due to stress concentration during clamping.

[0035] In some specific embodiments of this utility model, the workpiece placement channel 410 includes a placement section 411 and a chip removal section 412, wherein the placement section 411 is suitable for placing the workpiece. For example... Figure 4 As shown, in this embodiment, the placement section 411 can be adapted to the shape of the workpiece, stably placing and clamping the workpiece. When the machining hole of the workpiece is a through hole, the chip removal section 412 can accommodate the chips generated during machining, avoiding chip accumulation that may affect machining accuracy or progress.

[0036] In some specific embodiments of this utility model, the limiting mechanism 100 includes a positioning plate 120 and a pad 130 connected vertically, and the positioning plate 120 and the pad 130 form a first groove 110. For example... Figure 6 As shown, in this embodiment, the positioning plate 120 and the pad 130 are fixedly connected vertically. This split structure facilitates cost reduction by simply replacing the positioning plate 120 with the corresponding specification for different sizes of the clamp 200. It is understood that the positioning plate 120 and the pad 130 can be connected by bolts, and the pad 130 can be provided with a through hole, making the positioning plate 120 and the pad 130 suitable for direct locking onto the processing platform.

[0037] In some specific embodiments of this utility model, at least one third through groove 131 is formed in the bottom partial surface of the pad 130, and the third through groove 131 extends from the first side to the second side of the pad 130.

[0038] like Figure 6As shown, in this embodiment, the bottom surface of the pad 130 is partially recessed to form four parallel third through grooves 131, which extend from the left side to the right side of the pad 130. The third through grooves 131 facilitate the disassembly and installation of the pad 130, preventing vacuum adsorption of cutting fluid between its bottom surface and the machining table, thus making it easier to place and remove. It can be understood that the first side and the second side can be the left side, right side, front side, and rear side of the pad 130.

[0039] In some specific embodiments of this utility model, the pad 130 is provided with a fourth through groove 132, the locking member 300 is provided with a threaded through hole 310, the lower end of the boring chuck 400 is connected to the threaded through hole 310, and the groove opening of the fourth through groove 132 is opposite to the workpiece placement through groove 410.

[0040] like Figure 6 As shown, in this embodiment, the machining hole of the workpiece, the workpiece placement through slot 410, the threaded through hole 310, and the fourth through slot 132 together form a vertical chip removal channel. This channel ensures that the cutting chips generated during machining are smoothly discharged, preventing chips from accumulating in the machining hole of the workpiece and affecting machining accuracy.

[0041] In some specific embodiments of this utility model, a positioning mechanism 500 is also included. The positioning mechanism 500 has a second groove 510 and a first through groove 551. The second groove 510 and the central axis of the first through groove 551 are set at an angle. The opening of the workpiece placement through groove 410 is opposite to the opening of the first through groove 551. The opening of the first through groove 551 is smaller than the opening of the workpiece placement through groove 410.

[0042] like Figure 6 As shown, in this embodiment, the groove direction of the second groove 510 forms a 90-degree angle with the groove direction of the first through groove 551. The groove direction of the second groove 510 can face the periphery of the positioning mechanism 500, thereby enabling the limiting mechanism 100 to enter the second groove 510 from the side. The boring tool then enters the second groove 510 from above through the first through groove 551, and then moves downward into the machining hole of the workpiece to machine the workpiece. It can be understood that the groove opening of the first through groove 551 is smaller than the groove opening of the workpiece placement through groove 410, that is, the groove opening of the first through groove 551 is smaller than the outer shape of the workpiece, thereby preventing the boring tool from lifting the workpiece when retracting, thus achieving axial limiting of the workpiece.

[0043] In some specific embodiments of this utility model, the positioning mechanism 500 includes a left support plate 520, a right support plate 530, a positioning support plate 540, and an upper baffle 550. The left support plate 520, right support plate 530, positioning support plate 540, and upper baffle 550 form a second groove 510. A first through groove 551 is disposed on the upper baffle 550. The left support plate 520, right support plate 530, and positioning support plate 540 are in contact with the limiting mechanism 100. Figure 1 and Figure 6 As shown, in this embodiment, the left support plate 520, the right support plate 530, the positioning support plate 540 and the upper baffle 550 are adapted to be fixedly mounted on the machining base, so that the limiting mechanism 100 can be accurately placed on the machining base without complex alignment, and achieve preliminary positioning with the rotation center axis of the boring tool.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A boring tool, characterized in that, include: The limiting mechanism (100) has a first groove (110) and a limiting protrusion (111) is provided on the side wall of the first groove (110). A sleeve (200) is provided, which is in clearance fit with the limiting mechanism (100). A limiting groove (210) is provided on the periphery of the sleeve (200). A limiting protrusion (111) extends partially into the limiting groove (210). A tapered through hole (220) is provided on the inner side of the sleeve (200). A locking member (300) is disposed in the first groove (110). The upper end face of the locking member (300) is in contact with the lower end face of the clip (200), and the lower end face of the locking member (300) is in contact with the bottom of the first groove (110). A boring chuck (400) is inserted into the tapered through hole (220). The lower end of the boring chuck (400) is connected to the locking member (300). The boring chuck (400) has a workpiece placement through groove (410).

2. The boring tool according to claim 1, characterized in that, The tapered through hole (220) includes a first tapered section (221) at the upper part and a first straight section (222) at the lower part. The boring chuck (400) includes a second tapered section (420) and a second straight section (430). The first tapered section (221) is adapted to the second tapered section (420). The second straight section (430) passes through the first straight section (222). The tail end of the second straight section (430) is connected to the locking member (300).

3. A boring fixture according to claim 1, characterized in that, The boring chuck (400) has at least one second through groove (440) on its periphery. The second through groove (440) penetrates a portion of the sidewall of the workpiece placement through groove (410) and extends to the upper opening of the workpiece placement through groove (410).

4. A boring fixture according to claim 3, characterized in that, The bottom of the second through groove (440) is spherical.

5. A boring fixture according to claim 1, characterized in that, The workpiece placement channel (410) includes a placement section (411) and a chip removal section (412), wherein the placement section (411) is suitable for placing workpieces.

6. A boring fixture according to claim 1, characterized in that, The limiting mechanism (100) includes a positioning plate (120) and a pad (130) connected vertically, and the positioning plate (120) and the pad (130) form the first groove (110).

7. A boring fixture according to claim 6, characterized in that, The bottom partial surface of the pad (130) is recessed to form at least one third through groove (131), which extends from a first side to a second side of the pad (130).

8. A boring fixture according to claim 6, characterized in that, The pad (130) has a fourth through groove (132), the locking member (300) has a threaded through hole (310), the lower end of the boring chuck (400) is connected to the threaded through hole (310), and the opening of the fourth through groove (132) is opposite to the workpiece placement through groove (410).

9. A boring fixture according to claim 1, characterized in that, It also includes a positioning mechanism (500), which has a second groove (510) and a first through groove (551). The second groove (510) is set at an angle to the central axis of the first through groove (551). The opening of the workpiece placement through groove (410) is opposite to the opening of the first through groove (551). The opening of the first through groove (551) is smaller than the opening of the workpiece placement through groove (410).

10. A boring fixture according to claim 9, characterized in that, The positioning mechanism (500) includes a left back plate (520), a right back plate (530), a positioning back plate (540), and an upper baffle (550). The left back plate (520), the right back plate (530), the positioning back plate (540), and the upper baffle (550) form the second groove (510). The first through groove (551) is disposed on the upper baffle (550). The left back plate (520), the right back plate (530), and the positioning back plate (540) are in contact with the limiting mechanism (100).

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