A new chamfering fixture

Abstract

The utility model discloses a novel chamfering clamp belongs to chamfering technical field, a novel chamfering clamp, including elastic cover, mandrel, pull rod and base, the base is fixed on lathe frock table through screw, and the base top is fixed mandrel through the internal hexagonal cylindrical head screw, the mandrel top is the conical frustum shape, the elastic cover inner surface is the taper surface, is used for the cooperation mandrel's conical outer surface, and the elastic cover peripheral wall is distributed and is equipped with the opening groove of mutual interval, the pull rod top end penetrates mandrel, and the top is equipped with the flange and is pasted the elastic cover inner top, and the top is equipped with internal thread and compression screw fixed connection, and the lower part is equipped with external thread and the tension cylinder joint connection of lathe, the elastic cover is fixed in the pull rod top end through compression screw. This novel chamfering clamp structure is reasonable, and the machining precision is high, and the operation is simple, convenient, high production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chamfering technology, specifically to a novel chamfering clamp. Background Technology

[0002] In the current workpiece processing process, the workpiece needs to be fixed on a chamfering machine tool, and the end face of the workpiece is chamfered and deburred by the cutting tool on the machine tool. When processing the workpiece on the existing chamfering machine tool, the inner hole of the workpiece and the fixture are positioned by clearance fit, and the end face is tightened by manual tightening of the clamping nut. Because the workpiece and the fixture are in clearance fit and the parts are tightened by manual tightening, the positioning is inaccurate, the accuracy does not meet the drawing requirements, and the production efficiency is low. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of chamfering fixture. This new chamfering fixture has a reasonable structure, high processing accuracy, simple and convenient operation, and high production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A novel chamfered clamp includes an elastic sleeve, a mandrel, a pull rod, and a base. The base is fixed to the machine tool fixture by screws. The top of the base is fixed to the mandrel by an internal hexagonal head screw. The top of the mandrel is frustoconical. The inner surface of the elastic sleeve is conical to fit the conical outer surface of the mandrel. The peripheral wall of the elastic sleeve is provided with mutually spaced, axially spaced openings. The top of the pull rod passes through the mandrel. A flange is provided above the pull rod to fit the top of the elastic sleeve. An internal thread and a clamping screw are provided above the pull rod for fixing. An external thread is provided below the pull rod for connecting to the tensioning cylinder connector of the machine tool. The elastic sleeve is fixed to the top of the pull rod by the clamping screw.

[0005] Preferably, the elastic sleeve is made of 65Mn spring steel to give it sufficient contractility, and its conical surface is ground to match the outer conical surface of the mandrel, with a contact area greater than 80%.

[0006] Preferably, a limiting sleeve is provided on the mandrel, and the limiting sleeve is locked to the outer circle of the mandrel by an internal hexagon set screw.

[0007] Compared with the prior art, the present invention has the following advantages: During chamfering, the workpiece body is fitted onto the elastic sleeve, and the countersunk surface of the workpiece body fits against the limiting sleeve. After the machine tool is started, the tightening cylinder connector drives the pull rod and the clamping screw, thereby causing the elastic sleeve to slide downward on the mandrel and expand, thus clamping the workpiece body and achieving gapless operation. The design structure of this utility model improves the chamfering accuracy, is simple and convenient to operate, and can be combined with a robot to form a production line, greatly improving production efficiency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the novel chamfered clamp of this utility model; In the diagram: 1. Clamping screw, 2. Elastic sleeve, 3. Limiting sleeve, 4. Socket head cap screw, 5. Mandrel, 6. Pull rod, 7. Socket head cap screw, 8. Base, 9. Tensioning cylinder connector. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0011] This utility model provides, for example Figure 1 A novel chamfered fixture is shown, comprising: an elastic sleeve (2), a mandrel (5), a pull rod (6), and a base (8). The base (8) is fixed to the machine tool fixture by screws. The top of the base (8) is fixed to the mandrel (5) by an internal hexagonal head screw (7). The top of the mandrel (5) is frustoconical. The inner surface of the elastic sleeve (2) is conical and is used to match the conical outer surface of the mandrel. The peripheral wall of the elastic sleeve (2) is provided with mutually spaced, axially spaced opening slots. The top of the pull rod (6) passes through the mandrel (5). A flange is provided above to fit the top of the elastic sleeve (2). An internal thread and a clamping screw (1) are provided above to fix it. An external thread is provided below to connect with the tensioning cylinder connector (9) of the machine tool. The elastic sleeve (2) is fixed to the top of the pull rod (5) by the clamping screw (1).

[0012] Specifically, the elastic sleeve (2) is made of 65Mn spring steel to give it sufficient shrinkage. Its conical surface is ground with the outer conical surface of the mandrel (5) and the contact area is greater than 80%.

[0013] Specifically, a limiting sleeve (3) is provided on the mandrel (5), and the limiting sleeve (3) is locked on the outer circle of the mandrel (5) by an internal hexagon set screw (4).

[0014] The manufacturing process of this new chamfered fixture is as follows: First, fix the base (8) to the machine tool worktable with screws. Then, fix the mandrel (5) to the base (8) with 6 hexagon socket head cap screws. Use a dial indicator to check that the runout of the outer circle of the mandrel (5) relative to the center of the machine tool worktable is no more than 0.005mm. Then, put the limiting sleeve (3) onto the outer circle of the mandrel (5) and lock the limiting sleeve (3) onto the outer circle of the mandrel (5) with 4 hexagon socket set screws (4). Next, insert the pull rod (6) from the middle of the mandrel (5) and fix it to the tension cylinder connector (9). Then, put the elastic sleeve (2) onto the mandrel (5) and fix it to the tension cylinder connector (9) with the clamping screw (1). Lock the elastic sleeve (2). The process of processing parts using the new type of elastic tension chamfered fixture is as follows: The workpiece body is placed on the elastic sleeve (2), and the countersunk surface of the workpiece body is in contact with the limiting sleeve (3). After the machine tool is started, the tension cylinder connector (9) drives the pull rod (6) and the clamping screw (1), so that the elastic sleeve (2) slides down on the spindle (5) and expands, thereby clamping the workpiece body and achieving gapless operation. After the workpiece body is processed, the tension cylinder connector (9) is reset upward, and finally the elastic sleeve (2) is reset, so that the workpiece body can be released and a new workpiece can be replaced for processing.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel chamfered clamp, comprising an elastic sleeve (2), a mandrel (5), a pull rod (6), and a base (8), characterized in that: The base (8) is fixed to the machine tool fixture by screws. The top of the base (8) is fixed to the spindle (5) by the internal hexagonal head screw (7). The top of the spindle (5) is truncated cone-shaped. The inner surface of the elastic sleeve (2) is conical and is used to match the conical outer surface of the spindle. The elastic sleeve (2) has axially spaced slots distributed on its peripheral wall. The top of the pull rod (6) passes through the spindle (5). The upper part has a flange that fits the top of the elastic sleeve (2). The upper part has an internal thread and a clamping screw (1) for fixing. The lower part has an external thread that connects to the tensioning cylinder connector (9) of the machine tool. The elastic sleeve (2) is fixed to the top of the pull rod (5) by the clamping screw (1).

2. The novel chamfered clamp according to claim 1, characterized in that: The elastic sleeve (2) is made of 65Mn spring steel, which gives it sufficient shrinkage. Its conical surface is ground with the outer conical surface of the mandrel (5), and the contact area is greater than 80%.

3. The novel chamfered clamp according to claim 1, characterized in that: A limiting sleeve (3) is provided on the mandrel (5), and the limiting sleeve (3) is locked on the outer circle of the mandrel (5) by an internal hexagon set screw (4).

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