CN210080757U - Special internal expanding clamp replacing excircle spring clamp means - Google Patents

Abstract

A special internal expansion clamp for replacing an excircle spring clamp means comprises a connecting sleeve, a flange plate, an internal expansion chuck and a pull rod, wherein a through hole is arranged at the axis of a machine tool spindle, the connecting sleeve is sleeved in the through hole inside the machine tool spindle, the connecting sleeve is coaxial with the machine tool spindle, a threaded through hole is arranged in the center of the end face of the connecting sleeve, which is close to the end part of the machine tool spindle, threaded holes are arranged around the threaded through hole in the center of the connecting sleeve, a flange plate is sleeved on the outer side of the end part of the machine tool spindle, the center of the flange plate is provided with a threaded through hole, the flange plate is fixedly connected with an inner expansion chuck through the threaded through hole, the side face of one end, far away from the flange plate, of the inner expansion chuck is provided with a positioning pin, the pull rod penetrates through the through hole in the centers of the inner expansion chuck and the connecting sleeve, one end, penetrating through the connecting sleeve, of the pull rod is fixedly connected with the connecting sleeve through threads, and one end, far away from the flange plate, of the inner expansion chuck is connected with the large end face of a workpiece. The beneficial effects of the utility model are that improve product quality and precision, reduce anchor clamps preparation cycle, the cost is low, makes things convenient for the part to change.

Description

A special internal expansion clamp that replaces the external spring clamp

technical field

The utility model belongs to the field of machinery, in particular to a special internal expansion clamp which replaces the means of an external spring clamp.

Background technique

Now the market demand for unidirectional products is increasing, which leads to more stringent requirements for product quality, and more stringent requirements for the coaxiality accuracy of the motor slide six splines and splines, but the ordinary clamping method, if you want to process It is very cumbersome to produce high precision, and it requires a high level of operation for workers. For the time being, there is no new type of clamping tool on the market.

The old-fashioned fixture is based on the small end face of the product, and the small outer diameter is the clamping surface. It works through the hydraulic system and its connecting parts to clamp, but the life of the fixture is low. Due to the limitation of the machine tool, the fixture wall is too thin. The clamping force is unstable, which can easily lead to unstable product dimensions and affect the accuracy of the workpiece. Using the end face of the spline as a reference to clamp the outer diameter of the machined hole, the coaxial accuracy of the hole and the six flowers is unstable, which will lead to poor product quality. According to the customer's request, the defective rate of the product is high.

Utility model content

The purpose of the utility model is to provide a special internal expansion clamp which is simple in structure and easy to operate, replacing the means of the external spring clamp, and is especially suitable for processing the six splines and the splines of the motor sliding seat.

The technical scheme of the utility model is as follows: a special internal expansion clamp which replaces the external spring clamp means, comprising a connecting sleeve, a flange, an internal expansion chuck and a tie rod, a through hole is arranged at the axis of the machine tool main shaft, A connecting sleeve is sleeved through the through hole, and the connecting sleeve is coaxial with the machine tool spindle. The center of the end face of the connecting sleeve close to the end of the machine tool spindle is provided with a threaded through hole, and the threaded through hole in the center of the connecting sleeve is surrounded by threaded holes. A flange is sleeved on the outer side of the end of the main shaft, a threaded through hole is arranged in the center of the flange, and the flange is fixedly connected to the internal expansion chuck through the threaded through hole. A positioning pin is arranged on the side of one end of the collet away from the flange, the pull rod passes through the through hole in the center of the internal expansion collet and the connecting sleeve, and one end of the pull rod passes through the connecting sleeve to fix the connecting sleeve through threads, and the internal expansion collet is far away from the connecting sleeve. One end of the flange is connected to the large end face of the workpiece.

Further, the end face of the connecting sleeve close to one end of the tie rod is provided with a threaded hole, and the end of the tie rod close to the connecting sleeve is provided with a thread.

Further, the flange is fixedly connected to the frame by bolts.

The advantages and positive effects that the utility model has are:

1. When machining the workpiece, change the original machining datum plane, take the six-flower bottom surface as the datum plane, and perform clamping work through the hydraulic system and other connecting parts, which can stably control the accuracy and improve the product quality.

2. The easily worn parts of the clamping device are the flange, the internal expansion chuck and the locating pin, which are all common and easy to replace parts. When excessive wear occurs, the parts can be easily replaced at any time to improve the processing speed of the product.

3. The accuracy of the fixture tooling is higher than that of the old-fashioned tooling, and the manufacturing cost of the replaceable parts is low, which effectively saves costs, improves the machining accuracy of the workpiece, and achieves low cost and high quality. Common internal expansion hydraulic chucks cost less, have a longer life, and are easy to install, replace and maintain.

Description of drawings

Fig. 1 is the sectional view of the present utility model;

In the picture:

1. Machine tool spindle 2. Connecting sleeve 3. Flange

4. Internal expansion chuck 5. Pull rod 6. Positioning pin

Detailed ways

The present utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1:

A special internal expansion clamp that replaces the external spring clamp means, including a connecting sleeve 2, a flange 3, an internal expansion chuck 4 and a tie rod 5, a through hole is provided at the axis of the machine tool spindle 1, and a through hole inside the machine tool spindle 1 is provided. A connecting sleeve 2 is sleeved, and the connecting sleeve 2 is coaxial with the machine tool spindle 1. The center of the end face of the connecting sleeve 2 close to the end of the machine tool spindle 1 is provided with a threaded through hole, and the threaded through hole in the center of the connecting sleeve 2 is surrounded by surrounding settings. A threaded hole, a flange 3 is sleeved outside the end of the machine tool spindle 1, a threaded through hole is arranged in the center of the flange 3, and the flange 3 is fixedly connected to the internal expansion chuck 4 through the threaded through hole, and the internal expansion chuck 4 Coaxial with the main shaft 1 of the machine tool, a positioning pin 6 is provided on the side of one end of the inner expansion chuck 4 away from the flange 3, the pull rod 5 passes through the through hole in the center of the inner expansion chuck 4 and the connecting sleeve 2, and the pull rod 5 passes through the center of the connecting sleeve 2. One end of the connecting sleeve 2 is fixedly connected to the connecting sleeve 2 by means of threads.

The end face of the connecting sleeve 2 close to one end of the pull rod 5 is provided with a threaded hole, and the end of the pull rod 5 close to the connecting sleeve 2 is provided with a thread.

The flange 3 is fixedly connected to the frame by bolts.

The working process of this example: when the old tooling is clamping the workpiece, the small end face of the product is clamped on the main shaft of the machine tool through the fixture, and the coaxiality of the product cannot be accurately controlled during processing, which increases the difficulty of processing. And equipment wears out too fast.

In the process of using the tooling of the utility model, the machine tool spindle 1, the connecting sleeve 2, the flange 3, the internal expansion chuck 4 and the tie rod 5 are connected to ensure the coaxial connection of the connecting sleeve 2 and the internal expansion chuck 4. After the positioning pin 6 is fixed to the designated position, finally the large end face of the processed product is connected to the end of the positioning pin 6 of the internal expansion chuck 4, and the positioning pin 6 is used for positioning, open the hydraulic device to drive the pull rod 5 to move, the pull rod 5. The end of the positioning pin 6 of the internal expansion collet 4 is opened by the movement. After the internal expansion collet 4 is opened, the workpiece is clamped. The new clamping method is to pass the internal expansion collet 4 from the inside of the large end face of the processed product. Clamping, because the machining datum is replaced, the coaxiality of the machined product can be controlled more precisely, and the accuracy of the machined product can be improved, because each structure can be flexibly and conveniently replaced, and the cost of clamping parts is low, reducing equipment loss. , and reduce processing costs.

An embodiment of the present invention has been described in detail above, but the content is only a preferred embodiment of the present invention, and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present utility model should still belong to the scope of the patent of the present utility model.

Claims (3)

1. The utility model provides a replace special interior anchor clamps that expand of excircle spring clamp means, includes connecting sleeve (2), ring flange (3), interior bloated chuck (4) and pull rod (5), its characterized in that: a through hole is arranged at the axis of the machine tool main shaft (1), a connecting sleeve (2) is sleeved on the through hole in the machine tool main shaft (1), the connecting sleeve (2) is coaxial with the machine tool spindle (1), a threaded through hole is formed in the center of the end face, close to the end of the machine tool spindle (1), of the connecting sleeve (2), threaded holes are formed in the periphery of the threaded through hole in the center of the connecting sleeve (2) in a surrounding mode, a flange plate (3) is sleeved on the outer side of the end of the machine tool spindle (1), the center of the flange plate (3) is provided with a threaded through hole, the flange plate (3) is fixedly connected with an inner expansion chuck (4) through the threaded through hole, the inner expansion chuck (4) is coaxial with the machine tool spindle (1), a positioning pin (6) is arranged on the side surface of one end of the inner expansion chuck (4) far away from the flange plate (3), the pull rod (5) penetrates through a through hole in the center of the inner expansion chuck (4) and the center of the connecting sleeve (2), and the pull rod (5) penetrates through one end of the connecting sleeve (2) and is fixedly connected with the connecting sleeve (2) through threads.

2. The special internal expanding clamp replacing the external round spring clamp means as claimed in claim 1, wherein: the end face of one end, close to the pull rod (5), of the connecting sleeve (2) is provided with a threaded hole, and one end, close to the connecting sleeve (2), of the pull rod (5) is provided with threads.

3. The special internal expanding clamp replacing the external round spring clamp means as claimed in claim 1, wherein: the flange plate (3) is fixedly connected to the rack through bolts.

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