A fixture for processing green nozzles

Abstract

This utility model discloses a fixture for processing a nozzle green blank, including a fixed base; an arc-shaped sliding base that can slide along the arc-shaped fixed base in a first direction under the drive of a first driving component, the arc-shaped sliding base including a first plane abutting against the lower end face of the arc-shaped nozzle green blank. Two arc-shaped clamping bases are provided and respectively connected to corresponding second driving components. The arc-shaped clamping bases can slide along a second direction under the drive of the corresponding second driving components and can move synchronously with each arc-shaped sliding base. Each arc-shaped clamping base includes an arc surface located above the first plane of the arc surface and abutting against the side wall of the arc-shaped nozzle green blank. The arc surface and the first plane of the arc surface form a clamping cavity for clamping the arc-shaped nozzle green blank. The fixture satisfies the clamping force while reducing damage to the nozzle green blank and facilitating concentricity adjustment.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a fixture for processing nozzle green blanks. Background Technology

[0002] Green body processing is an indispensable step in the production of special ceramics. In current technology, a CNC engraving and milling machine is used to process the surface of the pressed green body. During processing, the green body needs to be fixed to the CNC engraving and milling machine using a clamp. Currently, the clamps used are mostly three-jaw chucks. However, because the three-jaw chuck only has three clamping points, the green body is prone to uneven stress during clamping, which can easily lead to micro-cracks. Furthermore, adjusting concentricity using a three-jaw chuck is quite cumbersome. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a fixture for processing nozzle green blanks, which can reduce damage to nozzle green blanks while meeting the clamping force requirements and facilitate the adjustment of concentricity.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a fixture for processing nozzle green blanks, comprising:

[0005] Fixed base;

[0006] A sliding seat, which is slidable along the fixed seat in a first direction under the drive of a first driving assembly, the sliding seat including a first plane that abuts against the lower end face of the nozzle green body;

[0007] The clamping seat has two clamping seats, each connected to a corresponding second driving component. The clamping seat can slide along a second direction under the drive of the corresponding second driving component and can move synchronously with the sliding seat. The clamping seat includes an arc surface located above the first plane and abutting against the side wall of the nozzle green. The arc surface and the first plane form a clamping cavity for clamping the nozzle green.

[0008] The beneficial effects of this utility model are as follows: A cross-shaped moving device is formed by the clamping seat and the sliding seat. With the fixed seat in place, the concentricity of the clamped nozzle green and the equipment can be adjusted by controlling the movement of the clamping seat and the sliding seat, solving the problem of difficulty in adjusting concentricity with previous three-jaw chucks. Simultaneously, the clamping seat and the nozzle green are in surface contact, increasing the clamping area and reducing micro-cracks caused by localized stress on the nozzle green.

[0009] Furthermore, the clamping seat includes a clamping part and a connecting part. The clamping part is located above the first plane, the arc surface is the opposite surface of the two clamping seats, and the connecting part is located outside the clamping part and connected to the second driving component.

[0010] Furthermore, the second drive assembly includes a second lead screw extending along a second direction, the second lead screw being rotatably connected to the sliding seat via a bearing housing, and the connecting portion having a threaded hole for threaded connection with the second lead screw.

[0011] Furthermore, the second drive assembly also includes a guide member, which is fixed on the sliding seat, and the connecting portion has a guide hole for the guide member to pass through.

[0012] Furthermore, the two arc surfaces are concentrically arranged, and the sum of the arc lengths of the two arc surfaces is greater than half the circumference of the concentric circles of the arc surfaces.

[0013] Furthermore, the first drive assembly includes a first lead screw extending along a first direction, the first lead screw being rotatably connected to the fixed seat, and a nut seat that is threadedly connected to the first lead screw being fixed to the lower end face of the sliding seat.

[0014] Furthermore, the fixed base is provided with a guide groove to guide the nut seat. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a top view of an embodiment of the present utility model;

[0017] Figure 3 for Figure 2 Sectional view along line AA;

[0018] Figure 4 This is a schematic diagram of the sliding seat in an embodiment of the present invention.

[0019] In the picture:

[0020] 1. Fixed base;

[0021] 2. Sliding seat; 21. First plane;

[0022] 3. First drive assembly; 31. First lead screw; 32. Nut seat;

[0023] 4. Clamping base; 41. Clamping part; 411. Arc surface; 42. Connecting part; 421. Threaded hole; 422. Guide hole;

[0024] 5. Second drive assembly; 51. Second lead screw; 52. Guide component. Detailed Implementation

[0025] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In the diagrams below, the first direction is the X direction, the second direction is the Y direction, and the vertical direction is the Z direction.

[0029] This utility model discloses a fixture for processing nozzle blanks, which is used to hold nozzle blanks. The nozzle blanks are cylindrical in structure, and the fixture can be fixed on a lathe to process the nozzle blanks.

[0030] See appendix Figure 1 and attached Figure 2 As shown, the fixture includes a fixed seat 1, a sliding seat 2, and a clamping seat 4. The fixed seat 1 is fixed on the lathe, the sliding seat 2 can slide along the fixed seat 1 to adjust the position of the sliding work and the clamping seat 4, and the clamping seat 4 is used to clamp the nozzle green.

[0031] The sliding seat 2 can slide along the fixed seat 1 in a first direction under the drive of the first drive assembly 3. The sliding seat 2 includes a first plane 21 that abuts against the lower end face of the nozzle green. There are two clamping seats 4, which are respectively connected to the corresponding second drive assembly 5. The clamping seats 4 can slide along the second direction under the drive of the corresponding second drive assembly 5 and can move synchronously with the sliding seats 2. The clamping seat 4 includes an arc surface 411 located above the first plane 21 and abutting against the side wall of the nozzle green. The arc surface 411 and the first plane 21 form a clamping cavity for clamping the nozzle green.

[0032] In this embodiment, a cross-shaped moving device is formed by the clamping seat 4 and the sliding seat 2. With the fixed seat 1 fixed, the concentricity of the clamped nozzle green and the equipment can be adjusted by controlling the movement of the clamping seat 4 and the sliding seat 2, which solves the problem of difficulty in adjusting the concentricity of the previous three-jaw chuck. At the same time, the clamping seat 4 and the nozzle green are in surface contact, which increases the clamping area and reduces the micro-cracks caused by local stress on the nozzle green.

[0033] See appendix Figure 1 and attached Figure 4 As shown, the clamping base 4 includes a clamping part 41 and a connecting part 42 arranged vertically. The clamping part 41 is located above the first plane 21, and the arc surface 411 is the opposite surface of the two clamping bases 4. The connecting part 42 is located outside the clamping part 41 and is connected to the second drive assembly 5. The connecting part 42 and the clamping part 41 form a stepped structure, ensuring that the clamping part 41 can move directly above the first plane 21, while the connecting part 42 is located outside the sliding base 2 and is connected to the second drive assembly 5.

[0034] The second drive assembly 5 includes a second lead screw 51 extending along a second direction. The second lead screw 51 is rotatably connected to a bearing seat and a sliding seat 2. A threaded hole 421 is provided on the connecting part 42 for threaded connection with the second lead screw 51. When the second lead screw 51 rotates, it can drive the clamping part 41 to move linearly back and forth along the second direction through the connecting part 42. The two clamping seats 4 can move separately to clamp and release the nozzle green. At the same time, the separate movement of the two clamping seats 4 can adjust the center of the nozzle green.

[0035] The second lead screw 51 can be rotated manually or driven by a motor or other rotary drive components.

[0036] If the sliding seat 2 deviates during movement, it will affect the clamping of the nozzle preform and the concentricity of the clamping. Therefore, the second drive assembly 5 also includes a guide member 52, which guides the movement of the clamping seat 4. The guide member 52 is fixed on the sliding seat 2, and the connecting part 42 has a guide hole 422 for the guide member 52 to pass through. The connecting part 42 slides along the guide member 52.

[0037] Two guide members 52 are provided, and the two guide members 52 are symmetrically arranged on both sides of the second lead screw 51.

[0038] See appendix Figure 3 As shown, the first drive assembly 3 includes a first lead screw 31 extending along a first direction. The first lead screw 31 is rotatably connected to the fixed seat 1, and a nut seat 32 threadedly connected to the first lead screw 31 is fixed to the lower end face of the sliding seat 2. The first lead screw 31 can be rotated manually or under the drive of a rotary drive component. When the first lead screw 31 rotates, the nut seat 32 reciprocates along the first lead screw 31, thereby driving the sliding seat 2 to move.

[0039] The sliding seat 2 and the nut seat 32 are detachably connected by bolts, which facilitates the replacement of the sliding seat 2.

[0040] To improve the stability of the sliding seat 2 during movement, a guide groove is provided on the fixed seat 1 to guide the nut seat 32. The nut seat 32 will not deviate when sliding in the guide groove, thus preventing the sliding seat 2 from deviating during movement.

[0041] Two concentric arc surfaces 411 are arranged. In order to stably hold the nozzle blank, the sum of the arc lengths of the two arc surfaces 411 is greater than half the circumference of the concentric circles of the arc surfaces 411. At this time, when the nozzle blank is held by the clamping seat 4, the area of ​​the nozzle blank abutting against the arc surface 411 is larger, and the nozzle blank can be held more stably.

[0042] When the nozzle blank is fixed by the fixture, after the nozzle blank is placed on the first plane 21, the two clamping seats 4 are driven to move closer to each other until the arc surface 411 abuts against the side wall of the nozzle blank to clamp it. At this time, the sliding seat 2 is adjusted according to the processing position requirements. The clamping seat 4 with the arc surface 411 avoids micro-cracks caused by local stress on the nozzle blank, and the clamping seat 4 and the sliding seat 2 form a centering base that can move in a cross direction, which can quickly correct concentricity and facilitate processing.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A fixture for processing nozzle green blanks, characterized in that: include: Fixed base; A sliding seat, which is slidable along the fixed seat in a first direction under the drive of a first driving assembly, the sliding seat including a first plane that abuts against the lower end face of the nozzle green body; The clamping seat has two clamping seats, each connected to a corresponding second driving component. The clamping seat can slide along a second direction under the drive of the corresponding second driving component and can move synchronously with the sliding seat. The clamping seat includes an arc surface located above the first plane and abutting against the side wall of the nozzle green. The arc surface and the first plane form a clamping cavity for clamping the nozzle green.

2. The fixture for processing nozzle green blanks according to claim 1, characterized in that: The clamping seat includes a clamping part and a connecting part. The clamping part is located above the first plane, and the arc surface is the opposite surface of the two clamping seats. The connecting part is located outside the clamping part and is connected to the second driving component.

3. The fixture for processing nozzle green blanks according to claim 2, characterized in that: The second drive assembly includes a second lead screw extending along a second direction. The second lead screw is rotatably connected to the sliding seat via a bearing housing. The connecting portion has a threaded hole that is threadedly connected to the second lead screw.

4. The fixture for processing nozzle green blanks according to claim 3, characterized in that: The second drive assembly also includes a guide member, which is fixed on the sliding seat, and the connecting part has a guide hole for the guide member to pass through.

5. The fixture for processing green nozzles according to any one of claims 1-4, characterized in that: The two arc surfaces are concentrically arranged, and the sum of the arc lengths of the two arc surfaces is greater than half the circumference of the concentric circles of the arc surfaces.

6. The fixture for processing nozzle green blanks according to claim 1, characterized in that: The first drive assembly includes a first lead screw extending along a first direction, the first lead screw being rotatably connected to the fixed seat, and a nut seat that is threadedly connected to the first lead screw being fixed to the lower end face of the sliding seat.

7. The fixture for processing nozzle green blanks according to claim 6, characterized in that: The fixed base is provided with a guide groove to guide the nut seat.

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