PTFE sealing gasket processing fixture

Abstract

The utility model belongs to the technical field of fixtures, and discloses a polytetrafluoroethylene gasket processing fixture. Its main technical features are: it includes a core expansion frame and an expansion core located on the core expansion frame, a bowl-shaped sleeve is arranged on the core expansion frame outside the expansion core, a limit stop ring is provided at the front of the bowl-shaped sleeve, a top spring is arranged inside the bowl-shaped sleeve, a top ring is arranged at the front end of the top spring, and the top ring includes a sleeve located in the front and a ring located behind the sleeve, the outer diameter of the sleeve is smaller than the inner diameter of the limit stop ring, and the outer diameter of the ring is larger than the inner diameter of the limit stop ring. The direction and distance of the gasket falling off each time are basically the same, which is convenient for the collection of the gasket. During the processing, there is basically no noise and no dust pollution.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a polytetrafluoroethylene sealing gasket processing clamp. Background Art

[0002] When processing polytetrafluoroethylene sealing gaskets, first extrude the polytetrafluoroethylene tube, then cut the polytetrafluoroethylene tube into annular gasket blanks, and then clamp the annular gasket blanks with a fixture, and process the blanks into sealing gaskets with a processing tool. The fixture currently used includes a core expansion frame and an expansion core located on the core expansion frame. A blowing pipe is provided on the core expansion frame. When the blank is processed, the expansion core shrinks, and the blowing pipe blows air to the sealing gasket, so that the sealing gasket falls from the fixture. The above-mentioned fixture has the following defects: First, since dust is generated during the processing of the processing tool, it is easy to blow dust into the air during the process of blowing the sealing gasket down by the blowing pipe, causing pollution to the environment and making the operator always in a harsh environment; second, noise is generated during the blowing process of the blowing pipe, causing noise pollution to the environment; third, the blowing and the core expansion retraction are not synchronized, resulting in an uncertain position of the falling gasket, which is easy to fall on the outside of the collection table. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a polytetrafluoroethylene sealing pad processing fixture with small air pollution, no noise and accurate falling position.

[0004] In order to solve the above problems, the technical solution adopted by the polytetrafluoroethylene sealing gasket processing fixture of the utility model is: it includes a core expansion frame and an expanding core located on the core expansion frame, a bowl-shaped sleeve is arranged on the core expansion frame outside the expanding core, a limit stop ring is provided at the front of the bowl-shaped sleeve, a top spring is arranged inside the bowl-shaped sleeve, and a top ring is arranged at the front end of the top spring, the top ring includes a sleeve located in the front and a ring located behind the sleeve, the outer diameter of the sleeve is smaller than the inner diameter of the limit stop ring, and the outer diameter of the ring is larger than the inner diameter of the limit stop ring.

[0005] Its additional technical features are:

[0006] The middle part of the expansion core is in a truncated cone shape, and the top spring is in a truncated cone shape matching the middle part of the expansion core.

[0007] Compared with the prior art, the polytetrafluoroethylene sealing gasket processing fixture provided by the utility model has the following advantages: first, since it includes a core expansion frame and an expanding core located on the core expansion frame, a bowl-shaped sleeve is arranged on the core expansion frame outside the expanding core, a limit stop ring is provided at the front of the bowl-shaped sleeve, a top spring is arranged inside the bowl-shaped sleeve, and a top ring is arranged at the front end of the top spring, the top ring includes a sleeve located in the front and a sleeve located behind the sleeve, the outer diameter of the sleeve is smaller than the inner diameter of the limit stop ring, and the outer diameter of the sleeve is larger than the inner diameter of the limit stop ring, the blank to be processed is placed in front of the expanding core, the blank is pressed backward, the blank squeezes the front of the sleeve backward, the sleeve is forced to retreat backward to squeeze the top spring, the top spring is shortened under the action of external force, at this time, the front top insert of the expanding core The blank is tightened while being inserted into the core, and the blank is fixed on the expanding core. After the processing of the processing tool is completed, the expanding core retracts, and the ring and the sleeve move forward under the elastic force of the top spring, pushing the processed sealing gasket to fall off the core expanding frame. When the ring reaches the rear end of the limit stop ring, the limit stop ring blocks the top ring to prevent the ring from falling off from the bowl-shaped sleeve. The direction and distance of the sealing gasket falling off each time are basically the same, which is convenient for the collection of the sealing gasket. During the processing, there is basically no noise and no dust pollution. Secondly, since the middle part of the expanding core is a truncated cone, the top spring is a truncated cone matching the middle part of the expanding core, the force of pushing the sleeve forward is basically the same, and the direction of pushing the sleeve forward is consistent with the axial direction of the sleeve, which prevents the direction of the top spring from deviating from the axial direction of the sleeve during the expansion and contraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a structural schematic diagram of a polytetrafluoroethylene sealing gasket processing fixture of the utility model;

[0009] Figure 2 is a cross-sectional view of a bowl-shaped sleeve;

[0010] Figure 3 is a schematic diagram of the structure of the top ring;

[0011] Figure 4 It is a schematic diagram of the structure of the top spring. DETAILED DESCRIPTION

[0012] The structure and use principle of the polytetrafluoroethylene sealing gasket processing fixture of the utility model are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0013] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a schematic diagram of the structure of a polytetrafluoroethylene sealing gasket processing fixture of the utility model, the polytetrafluoroethylene sealing gasket processing fixture of the utility model comprises a core expansion frame 1 and an expansion core 2 located on the core expansion frame 1, a bowl-shaped sleeve 3 is arranged on the core expansion frame 1 outside the expansion core 2, a limit stop ring 4 is provided at the front of the bowl-shaped sleeve, a top spring 5 is arranged inside the bowl-shaped sleeve 3, a top ring 6 is arranged at the front end of the top spring 5, the top ring 6 comprises a sleeve 61 located in the front and a ring 62 located behind the sleeve 61, the outer diameter of the sleeve 61 is smaller than the inner diameter of the limit stop ring 4, and the outer diameter of the ring 62 is larger than the inner diameter of the limit stop ring 4.

[0014] The blank to be processed is placed in front of the expanding core 2 and pressed backward. The blank squeezes the front of the sleeve 61 backward. The sleeve is forced to retreat backward and squeeze the top spring 5. The top spring 5 is shortened under the action of external force. At this time, the front of the expanding core 2 is inserted into the blank and tightened at the same time. The blank is fixed on the expanding core 2. After the processing of the processing tool is completed, the expanding core 2 retracts while the ring 62 and the sleeve 61 move forward under the elastic force of the top spring 5, pushing the processed sealing gasket to fall off from the expanding core frame. When the ring reaches the rear end of the limit stop ring, the limit stop ring blocks the top ring to prevent the ring from falling off from the bowl-shaped sleeve. The direction and distance of the sealing gasket falling off each time are basically the same, which is convenient for the collection of the sealing gasket. During the processing, there is basically no noise and no dust pollution.

[0015] The middle part of the expansion core 2 is truncated cone-shaped, and the top spring 5 is truncated cone-shaped to match the middle part of the expansion core. The force of pushing the sleeve 61 forward is basically the same, and the direction of pushing the sleeve forward is consistent with the axial direction of the sleeve, which avoids the direction of the top spring deviating from the axial direction of the sleeve during the expansion and contraction process.

[0016] The protection scope of the present invention is not limited to the above-mentioned embodiments. As long as the structure is the same or similar to the structure of the polytetrafluoroethylene sealing gasket processing fixture of the present invention, it falls within the protection scope of the present invention.

Claims

1. A polytetrafluoroethylene gasket processing fixture, comprising a core expansion frame and an expansion core located on the core expansion frame, characterized in that: A bowl-shaped sleeve is arranged on the core expansion frame outside the expanding core, a limit stop ring is provided at the front of the bowl-shaped sleeve, a top spring is arranged inside the bowl-shaped sleeve, a top ring is arranged at the front end of the top spring, and the top ring includes a sleeve located in the front and a ring located behind the sleeve, the outer diameter of the sleeve is smaller than the inner diameter of the limit stop ring, and the outer diameter of the ring is larger than the inner diameter of the limit stop ring.

2. The polytetrafluoroethylene gasket processing fixture according to claim 1, characterized in that: The middle part of the expansion core is in a truncated cone shape, and the top spring is in a truncated cone shape matching the middle part of the expansion core.

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