Positioning fixture for grinding PCBN tools

Abstract

The utility model discloses a kind of PCBN cutter grinding positioning fixtures, it is related to positioning fixture technical field, solve the problem that existing fixture does not have posture adjustment ability for clamped cutter.The utility model includes base, rotatable rotary table is equipped on base, pitch adjusting assembly is equipped on rotary table, and it is connected with clamping structure by pitch adjusting assembly, clamping structure is used to clamp PCBN cutter;Angle adjusting assembly for adjusting the angle of rotary table is equipped on base.PCBN cutter can be clamped by setting clamping structure, so that it is stably connected on fixture;Pitch adjusting assembly is set, the pitch of clamped PCBN cutter can be adjusted;By setting angle adjusting assembly, the angle of rotary table can be adjusted in horizontal direction, and then the horizontal angle of cutter is adjusted, by pitch adjusting assembly and angle adjusting assembly collaborative adjustment, so that cutter edge can better satisfy and polish surface of polishing equipment cooperation condition, improve polishing quality.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, and in particular to a positioning fixture for grinding PCBN tools. Background Technology

[0002] Cubic boron nitride (PCBN) is a superhard tool material with superior cutting performance in machining difficult-to-machine materials such as high-hardness materials and high-temperature alloys. PCBN tools require sharpening before use or after prolonged use to meet the requirements for turning operations.

[0003] Chinese utility model patent CN222222261U discloses a positioning fixture for grinding PCBN tools, including a base plate. The upper surface of the base plate has a first guide groove, and a grinding component is arranged inside the first guide groove. By pulling the drive rod, when the locking block disengages from the locking groove, the tool body or the placement table can be rotated. Subsequently, the locking block will be locked back into the locking groove by the elastic force of the first spring, ensuring the horizontal rotation of the tool body. Then, the other end of the tool body can be ground again through the cooperation of the positioning component, the drive component, and the grinding component. This solves the problem that some existing positioning fixtures for grinding PCBN tools are not convenient for grinding both ends of the tool. It eliminates the need for operators to unlock the tool body, greatly reducing the number of operation steps for operators, thereby reducing the complexity of the grinding work and improving the adjustment efficiency of the tool body.

[0004] In this solution, since the PCBN cutting tools are mostly rhomboid or triangular in shape, grinding equipment such as a grinding wheel is needed to grind the two inclined edges during grinding. Therefore, the posture of the cutting tool needs to be adjusted during the grinding process. However, the existing fixtures do not have the ability to adjust the cutting tool. Therefore, the grinding process of the cutting tool is difficult to achieve by using a fixed grinding wheel or other grinding equipment in conjunction with conventional fixtures. Utility Model Content

[0005] To address the shortcomings in the aforementioned background technology, this utility model proposes a positioning fixture for grinding PCBN tools, which solves the problem that existing fixtures lack the ability to adjust the posture of the clamped tool.

[0006] The technical solution of this utility model is implemented as follows: a positioning fixture for grinding PCBN tools includes a base, a rotatable turntable on the base, a pitch adjustment component on the turntable, and a clamping structure connected to the pitch adjustment component. The clamping structure is used to clamp PCBN tools. An angle adjustment component for adjusting the angle of the turntable is provided on the base.

[0007] Preferably, the pitch adjustment assembly includes a support housing fixedly mounted on the turntable, an arc-shaped slide groove on the support housing, an arc-shaped slide rail slidably mounted on the arc-shaped slide groove, the arc-shaped slide rail being fixedly connected to the support platform, and a worm gear transmission mechanism for adjusting the pitch angle of the support platform being provided between the support platform and the arc-shaped slide rail.

[0008] Preferably, the worm gear transmission mechanism includes a worm I rotatably mounted on a support housing, which engages with a worm wheel I rotatably mounted on the support housing. The worm wheel I is coaxially and fixedly connected to a transmission gear. An arc-shaped rack is fixedly mounted on the bottom surface of the support platform, and the transmission gear engages with the arc-shaped rack. A knob I is fixedly mounted on the shaft end of the worm I.

[0009] Preferably, a central shaft is provided at the axis of the turntable, and the central shaft is rotatably engaged with the base. The angle adjustment assembly includes a worm gear II coaxially fixed on the central shaft, and a worm II rotatably mounted on the base, which engages with the worm gear II. A knob II is fixedly provided at the end of the worm II shaft. A connecting hole is provided on the base.

[0010] Preferably, the clamping structure includes a receiving groove formed on the support platform, the receiving groove being used to mate with the tail end of the PCBN tool, and a locking bolt detachably provided on the receiving groove for mates with the mounting hole of the PCBN tool. The mating surface between the support platform and the support housing is an arc-shaped surface, and the curvature of the arc-shaped surface is consistent with the curvature of the arc-shaped slide rail.

[0011] The beneficial effects of this utility model are as follows: By setting a base, the connection between the entire fixture and the grinding equipment is facilitated, while providing a stable support foundation for the entire fixture; by setting a clamping structure, the PCBN tool can be clamped and stably connected to the fixture; by setting a pitch adjustment component, the pitch direction of the clamped PCBN tool can be adjusted; by setting an angle adjustment component, the angle of the turntable can be adjusted in the horizontal direction, thereby adjusting the horizontal angle of the tool. Through the coordinated adjustment of the pitch adjustment component and the angle adjustment component, the tool edges can better meet the grinding surface conditions of the grinding equipment, thus improving the grinding quality. Attached Figure Description

[0012] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the angle adjustment mechanism of this utility model; Figure 3 This is a schematic diagram of the supporting shell structure of this utility model; Figure 4 This is a schematic diagram of the support platform structure of this utility model; In the diagram: 1: Base, 2: Turntable, 21: Central shaft, 3: Pitch adjustment assembly, 31: Support housing, 32: Arc-shaped slide groove, 33: Arc-shaped slide rail, 34: Bearing platform, 35: Worm gear I, 36: Worm wheel I, 37: Transmission gear, 38: Arc-shaped rack, 39: Knob I, 4: Clamping structure, 41: Receiving groove, 42: Locking bolt, 6: PCBN tool, 5: Angle adjustment mechanism, 51: Worm wheel II, 52: Worm gear II, 53: Knob II, 11: Connecting hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1 As shown in Embodiment 1, a positioning fixture for grinding PCBN tools includes a base 1. The base facilitates the connection between the fixture and the grinding equipment, and provides a stable support foundation for the fixture. A rotatable turntable 2 is mounted on the base 1. A pitch adjustment component 3 is mounted on the turntable 2 and connected to a clamping structure 4 via the pitch adjustment component 3. The clamping structure 4 clamps the PCBN tool 6, securing it stably to the fixture. An angle adjustment component 5 is also mounted on the base 1 to adjust the angle of the turntable 2. The angle adjustment component allows adjustment of the turntable angle in the horizontal direction, thereby adjusting the horizontal angle of the tool. The pitch adjustment component adjusts the pitch direction of the clamped PCBN tool. The coordinated adjustment of the pitch and angle adjustment components ensures that the tool edges better meet the grinding surface requirements of the grinding equipment, improving grinding quality.

[0016] Example 2, based on Example 1, such as Figure 3 , 4As shown, the pitch adjustment assembly 3 includes a support housing 31 fixedly mounted on the turntable 2. In this embodiment, the support housing 31 is a cylindrical shell, coaxially mounted with the turntable 2 and connected by bolts. The support housing 31 has an arc-shaped groove 32, on which an arc-shaped slide rail 33 slides, and the arc-shaped slide rail 33 is fixedly connected to the support platform 34. Specifically, in this embodiment, two arc-shaped grooves are provided on the support housing, and two corresponding arc-shaped slide rails are provided at the bottom of the support platform, thus forming a more stable sliding connection structure. The mating surface between the support platform 34 and the support housing 31 is an arc-shaped surface, and the curvature of the arc-shaped surface is consistent with the curvature of the arc-shaped slide rail 33, ensuring that the two can move relative to each other during pitch adjustment and avoiding interference affecting movement.

[0017] In addition, a worm gear transmission mechanism for adjusting the pitch angle of the support platform 34 is provided between the support platform 34 and the arc-shaped slide rail 33. A central groove is provided in the middle of the support housing, and the worm gear transmission mechanism is located in the central groove.

[0018] Specifically, in this embodiment, the worm gear transmission mechanism includes a worm I 35 rotatably disposed in the central groove of the support housing 31. The worm I 35 cooperates with a worm wheel I 36 rotatably disposed on the support housing 31. The worm wheel I 36 is coaxially and fixedly connected to a transmission gear 37. An arc-shaped rack 38 is fixedly disposed on the bottom surface of the support platform 34, and the transmission gear 37 cooperates with the arc-shaped rack 38. In addition, a knob I 39 is fixedly disposed at the shaft end of the worm I 35. In this embodiment, the arc-shaped rack is arranged parallel to the arc-shaped slide rail, thereby avoiding motion interference.

[0019] When pitch adjustment is required in actual use, rotate knob I 39. Knob I drives worm gear I 35 to rotate, worm gear I 35 drives worm wheel I 36 to rotate, which in turn drives transmission gear 37 to rotate. Through the meshing of transmission gear 37 and arc rack, the support platform 34 is driven to make pitch movement along arc slide rail 33, so as to achieve precise adjustment of the pitch angle of PCBN tool 6.

[0020] Example 3, based on Example 2, such as Figure 2As shown, a central shaft 21 is provided at the axis of the turntable 2. The central shaft 21 is rotatably engaged with the base 1. In this embodiment, the base includes an upper seat and a lower seat, which are connected by a connecting block. A bearing is provided at the center of the upper seat, which is rotatably engaged with the central shaft. The lower end of the central shaft is connected to a bearing seat on the lower seat, thereby providing rotational support for the central shaft. The upper end of the central shaft is coaxially and fixedly connected to the turntable. The angle adjustment assembly 5 includes a worm gear II 51 coaxially fixedly mounted on the central shaft 21. The worm gear II is located between the upper and lower seats. A worm II 52 is rotatably mounted on the base 1, and the worm II 52 engages with the worm gear II 51. Specifically, in this embodiment, a bearing seat is fixedly connected between the lower and upper seats, and the worm shaft of the worm II is rotatably engaged with the bearing seat, thereby satisfying the rotation of the worm II.

[0021] In addition, a knob II 53 is fixedly installed at the end of the worm gear II 52 shaft. Rotating the knob II can drive the worm gear II to rotate, which in turn drives the worm wheel II to rotate, ultimately achieving the purpose of driving the turntable to rotate. Connection holes 11 are provided at all four corners of the base 1 for connecting to the worktable of conventional grinding equipment by bolts, ensuring the overall stability of the fixture.

[0022] In practical applications, this fixture can be mounted as a whole on the worktable of a CNC grinding machine or a manual grinding equipment and secured with bolts through connecting hole 11. Operators can fine-tune the pitch and horizontal angles using knobs I39 and II53, respectively, according to the grinding requirements, gradually aligning the tool edges with the grinding wheel surface to achieve precision grinding at multiple angles and with multiple edges. This utility model features a compact structure, high adjustment precision, and simple operation, making it suitable for various shapes of PCBN tools, especially those with complex structures such as rhombuses and triangles, and has broad industrial application prospects.

[0023] In addition, through the cooperation of worm gear I and worm I, and worm gear II and worm II, rotation adjustment can be achieved while also having a self-locking characteristic, maintaining the adjusted posture and preventing changes in the clamping posture during processing.

[0024] In Example 4, based on Example 3, the clamping structure 4 includes a receiving groove 41 formed on the support platform 34. The receiving groove 41 is used to mate with the tail end of the PCBN tool 6. A locking bolt 42 is detachably provided on the receiving groove 41 for mates with the mounting hole of the PCBN tool 6. Specifically, in this embodiment, the receiving groove is a triangular groove for supporting a rhomboid or triangular PCBN tool. A threaded hole is provided in the receiving groove. The bolt passes through the mounting hole in the center of the PCBN tool and the rear end connects to the threaded hole, thereby fixing the PCBN tool on the support platform.

[0025] As a further alternative, to reduce the interference of the fixture itself on the grinding of PCBN tools, such as Figure 4 As shown, a support block is fixedly installed on the bearing platform on one side of the receiving groove. Threaded holes are opened on the support block. During installation, the center of the rhomboid PCBN tool is fixed on the support block using locking bolts. One end of the tool is placed in the receiving groove, which can play a certain positioning role. The size of the support block is smaller than the PCBN tool, so that the outer edge of the PCBN tool is exposed for grinding.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for grinding PCBN tools, comprising a base (1), characterized in that: The base (1) is provided with a rotatable turntable (2), and the turntable (2) is provided with a pitch adjustment component (3), which is connected to a clamping structure (4) through the pitch adjustment component (3). The clamping structure (4) is used to clamp PCBN tools (6). The base (1) is provided with an angle adjustment component (5) for adjusting the angle of the turntable (2). The pitch adjustment component (3) includes a support housing (31) fixedly mounted on the turntable (2). The support housing (31) is provided with an arc-shaped slide groove (32), and an arc-shaped slide rail (33) is slidably mounted on the arc-shaped slide groove (32). 3) Fixedly connected to the support platform (34), a worm gear transmission mechanism for adjusting the pitch angle of the support platform (34) is provided between the support platform (34) and the arc-shaped slide rail (33); the worm gear transmission mechanism includes a worm I (35) rotatably mounted on the support housing (31), the worm I (35) cooperating with the worm wheel I (36) rotatably mounted on the support housing (31), the worm wheel I (36) coaxially and fixedly connected with the transmission gear (37), and an arc-shaped rack (38) fixedly mounted on the bottom surface of the support platform (34), the transmission gear (37) cooperating with the arc-shaped rack (38).

2. The positioning fixture for PCBN tool grinding according to claim 1, characterized in that: A knob I (39) is fixedly provided at the shaft end of the worm gear I (35).

3. The positioning fixture for PCBN tool grinding according to claim 1 or 2, characterized in that: The turntable (2) has a central shaft (21) at its axis, and the central shaft (21) is rotatably coupled with the base (1).

4. The positioning fixture for PCBN tool grinding according to claim 3, characterized in that: The angle adjustment assembly (5) includes a worm gear II (51) coaxially fixed on the central shaft (21), and a worm II (52) rotatably mounted on the base (1), with the worm II (52) cooperating with the worm gear II (51).

5. The positioning fixture for PCBN tool grinding according to claim 4, characterized in that: A knob II (53) is fixedly provided at the shaft end of the worm gear II (52).

6. The positioning fixture for PCBN tool grinding according to claim 5, characterized in that: The base (1) has a connection hole (11).

7. The positioning fixture for grinding PCBN tools according to any one of claims 1, 2, 4 to 6, characterized in that: The clamping structure (4) includes a receiving groove (41) opened on the support platform (34), the receiving groove (41) is used to cooperate with the tail end of the PCBN tool (6), and the receiving groove (41) is detachably provided with a locking bolt (42) for cooperating with the mounting hole of the PCBN tool (6).

8. The positioning fixture for PCBN tool grinding according to claim 1, characterized in that: The mating surface between the bearing platform (34) and the support shell (31) is an arc-shaped surface, and the curvature of the arc-shaped surface is consistent with the curvature of the arc-shaped slide rail (33).

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