Silicon nitride ceramic ball production roundness detection device

Abstract

The utility model relates to the field of silicon nitride ceramic ball production, and discloses a roundness detection device for silicon nitride ceramic ball production, which comprises a three-jaw chuck, three jaws of the three-jaw chuck are respectively provided with a vertically upward mounting shaft, each mounting shaft is rotatably provided with a positioning roller, and the positioning rollers are arranged on the three jaws of the three-jaw chuck. A mounting top plate is arranged above the base in a suspended mode through a support, the upper portion of the mounting top plate is sleeved with an abutting rod in an up-down sliding mode, the bottom end of the abutting rod is provided with an abutting head, the top end of the abutting rod is provided with a contact disc, and the contact disc makes contact with an extrusion head of a pressure sensor. The pressure sensor is installed above the installation top plate in an up-down sliding mode, the three positioning rollers are arranged above clamping jaws of the three-jaw chuck, and the three positioning rollers are matched with the pressure sensor capable of moving up and down, so that balls of various different sizes can be detected, and practicability is improved; and the convex or concave degree of the pressure sensor is judged according to the change degree of the numerical value of the pressure sensor.

Description

Technical Field

[0001] The utility model relates to the field of silicon nitride ceramic ball production, in particular to a roundness detection device for silicon nitride ceramic ball production. Background Art

[0002] Silicon nitride ceramic balls are precision ceramics sintered at high temperature in a non-oxidizing atmosphere. They can be used in environments with no lubricating media and high pollution, and have become the preferred material for ceramic bearings and hybrid ceramic ball bearings. After production, they need to be sampled and inspected to ensure that they meet the requirements, and their roundness needs to be tested. A steel ball roundness detector is disclosed in the Chinese utility model patent with announcement number CN219390888U. The steel ball can simultaneously rotate and rotate to facilitate the measurement of roundness parameters of different parts. The position adjustment operation is simple and the measurement value is accurate.

[0003] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects: silicon nitride ceramic balls have a variety of different sizes. In the above structure, the roundness disk is fixed above the support seat, and the probe below the roundness disk can be extended and retracted up and down but its moving distance is limited. This makes it difficult for the probe below the roundness disk to contact the ball when testing a ball with a large size difference (i.e., the ball used in the figure). For this reason, we designed a roundness detection device for silicon nitride ceramic ball production. Utility Model Content

[0004] In order to solve the technical problem that spheres of various sizes cannot be detected, the utility model provides a roundness detection device for production of silicon nitride ceramic balls.

[0005] The utility model is implemented by the following technical scheme: a roundness detection device for the production of silicon nitride ceramic balls, including a three-jaw chuck, the three-jaw chuck is installed above a base, and the three jaws of the three-jaw chuck are respectively provided with a vertical upward mounting shaft, each of the mounting shafts is rotatably mounted with a positioning roller, a mounting top plate is suspended above the base through a bracket, an abutment rod is slidably sleeved up and down above the mounting top plate, an abutment head is provided at the bottom end of the abutment rod, a contact disk is provided at the top end of the abutment rod, the contact disk is in contact with the extrusion head of a pressure sensor, and the pressure sensor is slidably installed up and down above the mounting top plate.

[0006] As a further improvement of the above scheme, a threaded end is provided above the abutment rod, and an adjusting screw plate is threadedly connected to the threaded end. The contact plate is fixed above the abutment rod by screws, which facilitates the rapid installation and disassembly of the adjusting screw plate and the contact plate, and further facilitates the replacement of the reset spring.

[0007] As a further improvement of the above scheme, a return spring is sleeved on the abutment rod, and the upper end of the return spring abuts against the lower end of the adjusting screw plate. The adjusting screw plate can change the compression amount of the return spring, and then can compress the return spring when the elastic force of the return spring becomes smaller, so that it still has a certain rebound effect.

[0008] As a further improvement of the above scheme, the bottom end of the abutment joint is in an arc-shaped structure, and the bottom end surface of the abutment joint is designed to be smooth. The abutment joint is in point contact with the surface of the sphere, and the smooth design prevents it from scratching the surface of the sphere, thereby improving the detection accuracy.

[0009] As a further improvement of the above scheme, the three positioning rollers are arranged in a ring array above the three-jaw chuck, and the abutment head is placed at the center of the circular structure formed by the three positioning rollers. The three positioning rollers move synchronously, and the center of the circle formed by them is always collinear, ensuring that the center of the sphere is collinear with the center of the circle. The abutment head is located directly above the sphere, which is convenient for detecting it.

[0010] As a further improvement of the above scheme, a lifting seat is vertically arranged above the mounting top plate, the front side surface of the lifting seat is recessed backward to form a lifting groove, a lifting screw rod is rotatably installed in the lifting groove, a lifting screw plate is threadedly connected to the lifting screw rod, the pressure sensor is installed on the front side surface of the lifting screw plate, the height of the pressure sensor can be adjusted as needed, so that the height of the abutment head can be changed accordingly, which is suitable for detecting balls of various sizes;

[0011] The top end of the lifting screw rod passes through the lifting seat and is placed above the lifting seat, and the top end of the lifting screw rod is plugged with a pull rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model sets three positioning rollers above the claws of the three-claw chuck and cooperates with a pressure sensor that can move up and down, so that it can detect spheres of various sizes, thereby improving practicality. The degree of convexity or concavity can be judged according to the degree of change of the value of the pressure sensor, which is intuitive;

[0014] 2. A reset spring is arranged above the abutment rod so that it can always be in contact with the pressure sensor, thereby facilitating subsequent detection. In addition, the adjusting screw plate arranged in cooperation ensures the elastic force of the reset spring and improves the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a roundness detection device for silicon nitride ceramic ball production provided by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure without sphere;

[0017] Figure 3 for Figure 1 Front view diagram of .

[0018] Description of main symbols:

[0019] 1. Base; 2. Three-jaw chuck; 3. Positioning roller; 31. Mounting shaft; 4. Mounting top plate; 41. Lifting seat; 42. Lifting slot; 5. Abutment rod; 51. Abutment head; 52. Contact plate; 53. Adjusting screw plate; 6. Lifting screw rod; 61. Lifting screw plate; 7. Pressure sensor; 8. Reset spring. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0021] Example:

[0022] Please combine Figure 1-Figure 3 A silicon nitride ceramic ball production roundness detection device of the present embodiment includes a three-jaw chuck 2, which is installed above a base 1, and the three jaws of the three-jaw chuck 2 are respectively provided with a vertically upward mounting shaft 31, and a positioning roller 3 is rotatably installed on each mounting shaft 31, and a mounting top plate 4 is suspended above the base 1 through a bracket, and an abutment rod 5 is slidably sleeved above the mounting top plate 4, and an abutment head 51 is provided at the bottom end of the abutment rod 5, and a contact plate 52 is provided at the top end of the abutment rod 5, and the contact plate 52 is in contact with the extrusion head of the pressure sensor 7, and the pressure sensor 7 is slidably installed above the mounting top plate 4.

[0023] A threaded end is provided above the abutment rod 5, and an adjusting screw plate 53 is threadedly connected to the threaded end. The contact plate 52 is fixed above the abutment rod 5 by screws, which facilitates the quick installation and disassembly of the adjusting screw plate 53 and the contact plate 52, and further facilitates the replacement of the reset spring 8.

[0024] A return spring 8 is sleeved on the abutment rod 5, and the upper end of the return spring 8 abuts against the lower end of the adjusting screw plate 53. The adjusting screw plate 53 can change the compression amount of the return spring 8, and then can compress the return spring 8 when the elastic force becomes smaller, so that it still has a certain rebound effect.

[0025] The bottom end of the abutment joint 51 is in an arc-shaped structure, and the bottom end surface of the abutment joint 51 is designed to be smooth. The abutment joint 51 is in point contact with the surface of the sphere, and the smooth design prevents it from scratching the surface of the sphere, thereby improving the detection accuracy.

[0026] The three positioning rollers 3 are arranged in a circular array above the three-jaw chuck 2, and the abutment head 51 is placed at the center of the circular structure formed by the three positioning rollers 3. The three positioning rollers 3 move synchronously, and the center of the circle formed by them is always collinear, ensuring that the center of the sphere is collinear with the center of the circle. The abutment head 51 is located directly above the sphere, which is convenient for detection.

[0027] A lifting seat 41 is vertically arranged above the installation top plate 4, and the front side surface of the lifting seat 41 is recessed backward to form a lifting groove 42, and a lifting screw rod 6 is rotatably installed in the lifting groove 42, and a lifting screw plate 61 is threadedly connected to the lifting screw rod 6. A pressure sensor 7 is installed on the front side surface of the lifting screw plate 61. The height of the pressure sensor 7 can be adjusted as needed, so that the height of the abutment head 51 can be changed accordingly, which is suitable for detecting balls of various sizes;

[0028] The top end of the lifting screw rod 6 passes through the lifting seat 41 and is placed above the lifting seat 41 , and a lever is inserted into the top end of the lifting screw rod 6 .

[0029] The implementation principle of a roundness detection device for silicon nitride ceramic ball production in the embodiment of the present application is as follows: in actual use, first adjust the spacing between the three positioning rollers 3 and the height of the pressure sensor 7 according to the size of the ball to be detected. Specifically, use the three-jaw chuck 2 tool to move the three claws inward or outward so that the ball can be placed between the three positioning rollers 3, and then rotate the lifting screw 6 counterclockwise. The lifting screw 6 can raise the pressure sensor 7 through the lifting screw plate 61, and the abutment rod 5 will also rise under the action of the reset spring 8. At this time, the abutment head 51 is above the ball, placing the ball in the circular shape formed by the three positioning rollers 3. The three jaws are moved inwards in the space, and then the three jaws are moved inwards by using the tool of the three-jaw chuck 2, so that the positioning roller 3 can be in rolling contact with the surface of the ball. Then the lever is turned clockwise, and the lifting screw 6 can move the pressure sensor 7 downwards through the lifting screw plate 61. The abutment rod 5 will also move downwards under the action of the pressure sensor 7, so that the abutment head 51 is in contact with the top of the ball. At this time, the pressure sensor 7 has a pressure, and then the ball is manually rotated in any direction. If the value of the pressure sensor 7 changes, it indicates that the ball has a convex or concave position, and the degree of convexity or concaveness is judged according to the degree of pressure change.

[0030] By arranging three positioning rollers 3 above the claws of the three-claw chuck 2 and cooperating with a pressure sensor 7 that can move up and down, it is possible to detect balls of various sizes, thereby improving practicality, and judging the degree of convexity or concavity according to the degree of change in the value of the pressure sensor 7 is intuitive;

[0031] A reset spring 8 is arranged above the abutment rod 5 so that it can always be in contact with the pressure sensor 7, thereby facilitating subsequent detection. The adjusting screw plate 53 is arranged in cooperation with the reset spring 8 to ensure the elastic force of the reset spring 8 and improve the detection accuracy.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A device for detecting roundness of silicon nitride ceramic balls in production, comprising a three-jaw chuck (2), characterized in that: The three-jaw chuck (2) is mounted above the base (1), and each of the three jaws of the three-jaw chuck (2) is provided with a mounting shaft (31) facing upward vertically, and each mounting shaft (31) is rotatably mounted with a positioning roller (3). A mounting top plate (4) is suspended above the base (1) through a bracket, and an abutment rod (5) is slidably sleeved above the mounting top plate (4). An abutment head (51) is provided at the bottom end of the abutment rod (5), and a contact plate (52) is provided at the top end of the abutment rod (5), and the contact plate (52) contacts the extrusion head of the pressure sensor (7). The pressure sensor (7) is slidably mounted above the mounting top plate (4).

2. A silicon nitride ceramic ball production roundness detection device as claimed in claim 1, characterized in that: A threaded end is provided above the abutment rod (5), an adjusting screw plate (53) is threadedly connected to the threaded end, and the contact plate (52) is fixed above the abutment rod (5) by means of screws.

3. A silicon nitride ceramic ball production roundness detection device as claimed in claim 2, characterized in that: A return spring (8) is sleeved on the abutment rod (5), and the upper end of the return spring (8) abuts against the lower end of the adjusting screw plate (53).

4. A silicon nitride ceramic ball production roundness detection device as claimed in claim 1, characterized in that: The bottom end of the abutment head (51) is in an arc-shaped structure, and the bottom end surface of the abutment head (51) is designed to be smooth.

5. A silicon nitride ceramic ball production roundness detection device as claimed in claim 4, characterized in that: The three positioning rollers (3) are arranged in a circular array above the three-jaw chuck (2), and the abutment head (51) is placed at the center of the circular structure formed by the three positioning rollers (3).

6. A silicon nitride ceramic ball production roundness detection device as claimed in claim 1, characterized in that: A lifting seat (41) is vertically arranged above the mounting top plate (4), the front side surface of the lifting seat (41) is recessed toward the rear to form a lifting groove (42), a lifting screw rod (6) is rotatably installed in the lifting groove (42), a lifting screw plate (61) is threadedly connected to the lifting screw rod (6), and the pressure sensor (7) is installed on the front side surface of the lifting screw plate (61); The top end of the lifting screw rod (6) passes through the lifting seat (41) and is placed above the lifting seat (41), and a lever is inserted into the top end of the lifting screw rod (6).

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