CN209919339U - Clamp for machining inner diameter of graphite ring - Google Patents

Abstract

The utility model discloses an anchor clamps for processing graphite ring internal diameter, including screw rod and nut to and wait to process the work piece, the front end and the nut threaded connection of screw rod, set up on the terminal surface of screw rod front end and wait to process work piece shape assorted draw-in groove, wait to process the work piece and be fixed in the draw-in groove through nut and screw rod centre gripping, the processing hole of the cutter advance and retreat of being convenient for is seted up at screw rod and nut central point, mesa is smooth surface with the interior mesa of nut in the draw-in groove, leaves the air knife groove at the root of draw-in groove and nut. Compared with the prior art, the utility model is suitable for the mechanical processing of graphite products which have the parallelism requirement on two end faces and the verticality requirement (the shape and position tolerance value is smaller, such as within 0.02 mm) on the inner diameter of the end faces. The requirements of small size tolerance value and small form and position tolerance value can be met on common equipment, the method is suitable for large-batch product production, the manufacturability can be effectively improved, the procedures are reduced, and the production period is shortened.

Description

A jig for machining the inner diameter of a graphite ring

technical field

The utility model relates to the field of fine machining of graphite products, in particular to a fixture for machining the inner diameter of a graphite ring.

Background technique

In the inner diameter finishing process of graphite ring products, there are parallelism requirements for both ends of the product, and at the same time, the inner diameter of the end faces has verticality requirements (the size and shape tolerance requirements are higher, such as within 0.02mm). At this time Product processing often needs to be guaranteed by a variety of equipment and processing methods, requiring high equipment precision, many product processing procedures, and relatively long production cycles. Moreover, the surface of graphite products is easy to wear, which seriously affects the machining accuracy.

Utility model content

The purpose of this utility model is to provide a fixture that solves the above problems and realizes high-precision machining of the inner diameter of the graphite ring.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a fixture for processing the inner diameter of a graphite ring, comprising a screw rod, a nut, and a workpiece to be processed, the front end of the screw rod is threadedly connected with the nut, and the The end face of the front end of the screw is provided with a slot that matches the shape of the workpiece to be processed. The workpiece to be processed is clamped and fixed in the slot by the nut and the screw. The slot structure can support the graphite ring well. For protection, the central part of the screw and the nut is provided with a machining hole for the advance and retreat of the tool, the inner table of the slot and the inner table of the nut are flat and smooth surfaces, and there is space at the root of the slot and the nut. Slots.

Preferably, the diameter of the machining hole is larger than the actual size of the inner diameter of the workpiece to be machined, and the inner diameter differs by 1 mm.

Preferably, the inner wall of the clamping groove is the same as the outer diameter of the workpiece to be machined, but the depth of the clamping groove is smaller than the thickness of the workpiece to be machined.

Preferably, the clamping groove and the machining hole are located on the same central axis.

Preferably, the rear end of the screw is clamped on a three-jaw chuck.

Compared with the prior art, the utility model has the advantages that it is suitable for graphite products that have parallelism requirements on both end faces and verticality requirements on the inner diameter of the end faces (small tolerances in shape and position, such as within 0.02mm). of machining. Advantages: simple, convenient, easy to clamp, can also meet the requirements of small dimensional tolerance and small geometric tolerance on ordinary equipment, suitable for large-scale production of products, can effectively improve craftsmanship, reduce processes, shorten Production cycle.

Description of drawings

Fig. 1 is the sectional schematic diagram of the utility model;

Fig. 2 is the structural representation of the utility model screw;

Fig. 3 is the structural representation of the screw end face of the utility model;

FIG. 4 is a schematic structural diagram of the end face of the nut of the present invention.

In the figure: 1. Screw; 2. Nut; 3. Workpiece to be processed; 4. Slot; 5. Inner table; 6. Empty tool slot; 7. Processing hole; 8. Three-jaw chuck.

Detailed ways

The utility model will be further described below.

Embodiment 1: Referring to Figures 1 to 4, a fixture for processing the inner diameter of a graphite ring includes a screw 1, a nut 2, and a workpiece 3 to be processed. The front end of the screw 1 is threadedly connected to the nut 2, The end surface of the front end of the screw 1 is provided with a slot 4 that matches the shape of the workpiece 3 to be processed. The workpiece 3 to be processed is clamped and fixed in the slot 4 by the nut 2 and the screw 1. The screw 1 and The central part of the nut 2 is provided with a machining hole 7 which is convenient for the advance and retreat of the tool. The inner table 5 of the slot 4 and the inner table 5 of the nut 2 are both flat and smooth surfaces. Empty knife groove 6, in order to meet the requirements of parallelism on both ends of the product and the verticality of the inner diameter of the end face, the front end of the screw 1 and the nut 2 are processed first, and the inner table 5 of the slot 4 and the nut 2 are processed. The inner table surface 5 is a flat and smooth surface, which is one of the key points to ensure the accuracy of the workpiece 3 to be processed. The slot 4 and the root of the nut 2 are left with an empty tool slot 6, which can mainly accommodate the cutting tool without cutting force. The tool is retracted in the state of , which is convenient for processing the table 5 in the screw 1 and the nut 2.

The diameter of the machining hole 7 is larger than the machining inner diameter of the workpiece 3 to be machined, and the inner diameter differs by 1 mm, which is suitable for finishing the inner diameter of the graphite ring.

The inner wall of the clamping groove 4 is the same as the outer diameter of the workpiece 3 to be processed, but the depth of the clamping groove 4 is less than the thickness of the workpiece 3 to be processed. After the cap 2, the workpiece 3 to be processed can be clamped between the screw 1 and the nut 2. If the graphite ring is thinner, it can be exposed less, and if the graphite ring is thicker, it can be exposed more.

The clamping groove 4 and the machining hole 7 are located on the same central axis line to ensure a uniform axis line, in order to ensure the machining accuracy of the inner diameter of the graphite ring.

When working: through the fine processing of the machining hole 7 and the table 5 in the slot 4, the parallelism requirements of the workpiece 3 to be processed after clamping are ensured, and the end face has the verticality requirement on the inner diameter, and the parallelism of the two end faces of the product is guaranteed. After ensuring, install it into the fixture slot 4, and press it with the nut 2 to process the inner diameter. After the three-jaw chuck 8 clamps one end of the screw 1 of the main body of the fixture, it is turned according to the product placed on the other end. After the product is placed in the slot 4, the two ends are pressed with the nut 2, and the inner diameter is turned or ground by the machine tool to the required size. .

The main body of the clamp of the utility model is in the form of a screw, the structure is simple, the clamping is convenient, the processing steps are reduced, the production cost is effectively reduced, and the production cycle is shortened, and the verticality requirement of the product end face to the inner diameter can be realized on a common lathe or an internal grinding machine. .

A fixture for processing the inner diameter of a graphite ring provided by the present invention has been described in detail above. Specific examples are used in this paper to illustrate the principles and implementations of the present invention. The descriptions of the above examples are only for the purpose of Help to understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiment and application scope, and changes to the present invention and Modifications will be possible without going beyond the spirit and scope of the appended claims, and in conclusion, the contents of this specification should not be construed as limiting the invention.

Claims (5)

1. The utility model provides a anchor clamps for processing graphite ring internal diameter which characterized in that: including screw rod and nut to and treat the processing work piece, the front end and the nut threaded connection of screw rod, set up on the terminal surface of screw rod front end and treat processing work piece shape assorted draw-in groove, treat that the processing work piece is fixed in the draw-in groove through nut and screw rod centre gripping, screw rod and nut central point are seted up the process hole of the cutter advance and retreat of being convenient for, mesa is smooth surface with the interior mesa of nut in the draw-in groove, leaves the dead eye groove at the root of draw-in groove and nut.

2. The clamp for machining the inner diameter of the graphite ring as claimed in claim 1, wherein: the aperture of the processing hole is larger than the actual size of the inner diameter of the workpiece to be processed, and the difference of the inner diameters is 1 mm.

3. The clamp for machining the inner diameter of the graphite ring as claimed in claim 1, wherein: the inner wall of the clamping groove is the same as the outer diameter of the workpiece to be processed, but the depth of the clamping groove is smaller than the thickness of the workpiece to be processed.

4. The clamp for machining the inner diameter of the graphite ring as claimed in claim 1, wherein: the clamping groove and the processing hole are located on the same central axis.

5. The clamp for machining the inner diameter of the graphite ring as claimed in claim 1, wherein: the rear end of the screw is clamped on the three-jaw chuck.

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