Three-dimensional clamp for drill tip coating

Abstract

The utility model discloses a drill point coating three-dimensional clamp which comprises a rotary table, sleeves and a clamp assembly, a circle of clamping holes are formed in the rotary table, one sleeve is correspondingly installed in each clamping hole, the sleeves can rotate relative to the rotary table, the tops of the sleeves are open, the clamp assembly can be correspondingly inserted into the sleeves, and drill point workpieces are clamped at the tops of the clamp assembly. The turntable drives the sleeve and the clamp assembly to rotate around the center of the turntable, and the sleeve drives the clamp assembly and the drill tip workpiece to rotate around a sleeve center shaft; the clamp assembly comprises a supporting rod, a top column and a gasket, the supporting rod is of a cylinder structure, the top column is arranged in the center of the top of the supporting rod, a round hole is formed in the center of the gasket, the gasket is arranged on the outer side of the top column in a sleeving mode, a blind hole corresponding to the top column is formed in the core portion of the bottom face of a drill tip workpiece to be clamped, the blind hole is inserted into the top column, and the bottom face of the drill tip workpiece is tightly attached to the surface of the gasket. According to the clamp, a drill tip workpiece can rotate around the center of the furnace and rotate at the same time when being subjected to coating operation in the coating furnace, and the thickness of a coating on the surface of the drill tip is uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of tool coating fixtures, and particularly relates to a three-dimensional fixture for drill tip coating. Background Art

[0002] Coating technology is widely used in the manufacture of drill bits. It can endow drill bits with multiple properties such as hardness, rapid penetration, and thermal stability, making drill bits more effective during the machining process. Currently, for the coating operation of the drill tip part, a two-dimensional fixture is generally used for clamping. The drill tip workpiece is attached to the surface of the two-dimensional fixture by hanging or magnetic attraction, and then placed in a coating furnace for coating operation. The two-dimensional fixture can increase the number of workpieces loaded into the furnace. However, the drill tip coating obtained through two-dimensional clamping operation is prone to coating micro-peeling. This is because the surface of the drill tip is not a flat surface but an uneven structure. During the coating operation, the drill tip and the two-dimensional fixture are relatively stationary, the coating is not uniform enough, and there is an easy problem of a large coating thickness difference between the top surface and the chip flutes of the drill tip. When the surface coating is uneven in thickness, micro-peeling is likely to occur, resulting in poor coating quality and significant economic losses. Content of the Utility Model

[0003] In view of the above problems and technical requirements, the utility model provides a three-dimensional fixture for drill tip coating. This fixture can perform three-dimensional clamping on the drill tip workpiece, enabling the drill tip workpiece to rotate around the furnace center and also rotate self-revolvingly during the coating operation in the coating furnace, with a uniform coating thickness on the surface of the drill tip and no peeling occurring.

[0004] The technical solution of the utility model is as follows: A three-dimensional fixture for drill tip coating includes a turntable, a sleeve, and a fixture assembly. A circle of clamping holes is provided on the turntable, and a sleeve is correspondingly installed in each clamping hole. The sleeve can rotate self-revolvingly relative to the turntable. The top of the sleeve is open, and the fixture assembly can be correspondingly inserted into the sleeve. The top of the fixture assembly clamps a drill tip workpiece. The turntable drives the sleeve and the fixture assembly to rotate around the center of the turntable, and the sleeve drives the fixture assembly and the drill tip workpiece to rotate around the central axis of the sleeve; the fixture assembly includes a support rod, a top column, and a gasket. The support rod is a cylindrical structure, a top column is provided at the center of the top of the support rod, a circular hole is provided at the center of the gasket, the gasket is sleeved outside the top column, and a blind hole corresponding to the top column is provided at the core of the bottom surface of the drill tip workpiece to be clamped. The blind hole is inserted on the top column, and the bottom surface of the drill tip workpiece is closely attached to the surface of the gasket. In the above solution, the turntable and the sleeve are used to clamp the fixture assembly, and the drill tip workpiece is clamped on the top of the fixture assembly. The turntable drives the sleeve to revolve, and the sleeve drives the fixture assembly and the drill tip workpiece to rotate self-revolvingly. In this way, the drill tip workpiece that rotates in two dimensions can obtain a more uniform coating effect, avoiding a large thickness difference between the surface and the chip flutes, having good coating quality, and being able to avoid the occurrence of peeling after the coating cools.

[0005] Further, the support rod and the top column are integrally formed. Chamfers are provided at the edges of the bottom end surface and the top end surface of the support rod, a chamfer is provided between the bottom of the top column and the top end surface of the support rod, and a chamfer is also provided at the edge of the top surface of the top column. The chamfers protect both the top column and the support rod, can reduce the damage during clamping, and extend the service life.

[0006] Further, the diameter of the support rod is 8 mm, and the diameter of the top column is 2 mm.

[0007] Further, the diameter of the gasket is 20 mm, and the diameter of the circular hole in the center of the gasket is 4 mm.

[0008] Further, the length of the support rod is greater than the accommodation height of the sleeve.

[0009] Further, the bottom of the sleeve is provided with positioning serrations.

[0010] Further, the turntable includes multiple disks fixedly connected. The clamping holes on each disk correspond one by one. The sleeve vertically penetrates into multiple clamping holes, and the sleeve remains in a vertical state.

[0011] The beneficial effects of the present utility model are as follows: 1) A cylindrical support rod is used as a fixture. The top column at the top of the support rod can clamp the drill tip workpiece, and the support rod body can cooperate with a general sleeve for clamping. Without the need to additionally set a rotating mechanism, this fixture assembly can cooperate with a general turntable fixture for placing rod-shaped tools to coat the drill tip workpiece. The drill tip workpiece can rotate both around its own axis and around the axis of the turntable during the coating process, resulting in uniform coating, effectively reducing the coating thickness difference between the top surface and the chip flutes of the drill tip, and improving the coating quality; 2) The gasket not only has a better supporting effect on the drill tip workpiece, but also can block the bottom surface of the drill tip, preventing the bottom surface of the drill tip from being coated during the coating process, and protecting the bottom surface of the drill tip. Description of the Drawings

[0012] Figure 1 It is the overall clamping structure diagram of the three-dimensional fixture for drill tip coating of the present utility model;

[0013] Figure 2 It is the schematic diagram of the cooperation between the fixture assembly and the sleeve in the three-dimensional fixture for drill tip coating of the present utility model;

[0014] Figure 3 It is the clamping diagram of the fixture assembly and the drill tip workpiece in the three-dimensional fixture for drill tip coating of the present utility model;

[0015] The reference signs in the figure are: turntable 1, clamping hole 11, sleeve 2, positioning serrations 21, fixture assembly 3, support rod 31, top column 32, gasket 33, circular hole 331, drill tip workpiece 4. Detailed Embodiments

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figures 1-3 The figure shows a three-dimensional fixture for drill tip coating of the utility model, comprising a turntable 1, a sleeve 2 and a fixture assembly 3. The turntable 1 is provided with a circle of clamping holes 11, and a sleeve 2 is correspondingly installed in each clamping hole 11. The sleeve 2 can rotate relative to the turntable 1. The top of the sleeve 2 is open, and the fixture assembly 3 can be correspondingly inserted into the sleeve 2. A drill tip workpiece 4 is clamped on the top of the fixture assembly 3. The turntable 1 drives the sleeve 2 and the fixture assembly 3 to rotate around the center of the turntable, and the sleeve 2 drives the fixture assembly 3 and the drill tip workpiece 4 to rotate around the central axis of the sleeve.

[0018] The turntable 1 comprises multiple layers of fixedly connected discs, each of which has a corresponding clamping hole 11, and the sleeve 2 vertically penetrates into the multiple clamping holes 11, and the sleeve 2 remains in a vertical state. The bottom of the sleeve 2 is provided with a positioning tooth 21, and the length of the support rod 31 is greater than the accommodation height of the sleeve 2.

[0019] The clamp assembly 3 includes a support rod 31, a top column 32 and a gasket 33. The support rod 31 is a cylindrical structure. The top center of the support rod 31 is provided with a top column 32. The center of the gasket 33 is provided with a round hole 331. The gasket 33 is sleeved on the outside of the top column 32. The core of the bottom surface of the drill tip workpiece 4 to be clamped is provided with a blind hole (not shown in the figure) corresponding to the top column 32. The blind hole is plugged into the top column 32, and the bottom surface of the drill tip workpiece 4 is tightly attached to the surface of the gasket 33. The support rod 31 and the top column 32 are integrally formed parts. The edges of the bottom end face and the top end face of the support rod 31 are both provided with round chamfers. A round chamfer is provided between the bottom of the top column and the top end face of the support rod, and a round chamfer is also provided on the top surface edge of the top column. The round chamfer has a protective effect on the top column and the support rod, which can reduce damage during the clamping process and extend the service life.

[0020] The diameter of the support rod 31 is 8 mm, the diameter of the top column 32 is 2 mm; the diameter of the gasket 33 is 20 mm, and the diameter of the circular hole 331 in the center of the gasket is 4 mm.

[0021] The clamping process of the utility model is as follows: the circular hole 331 of the gasket is sleeved on the outside of the top column 32, the blind hole at the bottom of the drill tip workpiece 4 is correspondingly plugged into the top column 32, and the bottom surface of the drill tip workpiece 4 is tightly attached to the upper surface of the gasket 33; the clamped fixture assembly 3 is correspondingly inserted into the sleeve 2, the bottom of the support rod 31 is inserted into the inner bottom surface of the sleeve 2, and the turntable 1 is pushed into the coating furnace. During the coating process, the turntable 1 drives the sleeve 2 to rotate, and the sleeve 2 is driven by the transmission mechanism at the bottom to rotate. The drill tip workpiece 4 rotates and revolves simultaneously in the furnace, and the coating is evenly applied to various parts of the drill tip surface. The overall structure of the coating is stable and it is not easy to peel off after cooling.

[0022] As described above, only several preferred embodiments of the present utility model are provided, but the protection scope of the present utility model is not limited thereto. Any changes and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A three-dimensional fixture for drill tip coating, characterized in that: It includes a turntable, a sleeve and a fixture assembly. There is a circle of clamping holes on the turntable, and a sleeve is correspondingly installed in each clamping hole. The sleeve can rotate relative to the turntable. The top of the sleeve is open, and the fixture assembly can be correspondingly inserted into the sleeve. The top of the fixture assembly clamps a drill tip workpiece. The turntable drives the sleeve and the fixture assembly to rotate around the center of the turntable, and the sleeve drives the fixture assembly and the drill tip workpiece to rotate around the central axis of the sleeve; the fixture assembly includes a support rod, a top column and a gasket. The support rod is of a cylindrical structure. There is a top column at the center of the top of the support rod. The gasket is provided with a round hole at the center. The gasket is sleeved outside the top column. There is a blind hole corresponding to the top column at the core of the bottom surface of the drill tip workpiece to be clamped. The blind hole is inserted on the top column, and the bottom surface of the drill tip workpiece is closely attached to the surface of the gasket.

2. The three-dimensional fixture for drill tip coating according to claim 1, characterized in that: The support rod and the top column are integrally formed. There are round chamfers at the edges of the bottom end surface and the top end surface of the support rod. There is a round chamfer between the bottom of the top column and the top end surface of the support rod, and there is also a round chamfer at the edge of the top surface of the top column.

3. A three-dimensional fixture for drill tip coating according to claim 2, characterized in that: The diameter of the support rod is 8 mm, and the diameter of the top column is 2 mm.

4. The three-dimensional fixture for drill tip coating according to claim 3, characterized in that: The diameter of the gasket is 20 mm, and the diameter of the round hole at the center of the gasket is 4 mm.

5. The three-dimensional fixture for drill tip coating according to claim 4, characterized in that: The length of the support rod is greater than the accommodation height of the sleeve.

6. The three-dimensional fixture for drill tip coating according to claim 5, wherein: The bottom of the sleeve is provided with positioning splines.

7. A three-dimensional fixture for drill tip coating according to claim 6, characterized in that: The turntable includes multiple disks fixedly connected. The clamping holes on each disk correspond one by one. The sleeve vertically penetrates into multiple clamping holes, and the sleeve remains in a vertical state.

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