CN205324771U - Interior positioner with adjustable high accuracy lathe collet chuck - Google Patents

Abstract

The utility model relates to an adjustable internal positioning device for a spring chuck of a high-precision lathe, which comprises a taper screw sleeve, an opening taper sleeve, a locking nut, a positioning screw, and an adjusting nut. An adjusting nut is screwed between the rear end and the rear end face of the taper screw sleeve. The internal thread of the adjusting nut cooperates with the external thread of the positioning screw. The upper part is threaded to connect the lock nut, which is used to push the open taper sleeve that matches the outer cone of the taper sleeve to move, and change the diameter of the small outer circle of the open taper sleeve, so as to produce a tight fit with the inner hole of the tail of the spring chuck. , the axial position is locked. Compared with the ordinary fixture, the utility model has a great difference in weight. The former has little influence on the rotation speed of the main shaft, that is, it does not affect the cutting speed of the workpiece, and at the same time, the noise generated at the same rotating speed is small.

Description

Adjustable inner positioning device for collet chuck of high precision lathe

technical field

The utility model relates to a processing limit technology equipment, in particular to an adjustable internal positioning device for a spring chuck of a high-precision lathe

Background technique

At present, in the field of mechanical processing, it is the most economical and affordable measure to select ordinary equipment and use collets in the mass production process of small and medium-sized shaft parts. Its advantages are: accurate and convenient clamping and centering, high clamping efficiency, large adjustment range of processing speed, low cost of quick purchase, stable operation of equipment, low noise, low operating cost, safety, and low labor intensity. and the environment are improved.

The biggest disadvantage of using collet chucks to process shaft parts is that there are defects in axial positioning. For the subsequent processing process after the blanking process, the axial positioning control cannot be effectively implemented, so it is difficult to stabilize the processing quality and improve the efficiency. Parts that require high axial dimensional accuracy are more difficult to adapt, the scope of application of the collet is limited, and the advantages cannot be fully utilized.

Contents of the invention

The utility model is to provide an adjustable internal positioning device for a high-precision lathe collet, and an "adjustable internal positioning device" is designed inside the collet, and the device is installed at the center of the tail of the collet. The spring collet equipped with the positioning device can control the axial size of the workpiece conveniently, effectively and reliably. The form and function of the workpiece clamped by the spring collet can effectively and reliably implement the axial positioning.

In order to achieve the above purpose, the technical solution of the utility model is: an adjustable internal positioning device for a high-precision lathe collet, including a taper screw sleeve, an opening taper sleeve, a lock nut, a positioning screw, and an adjusting nut. The taper The screw sleeve is connected to the positioning screw through threads, and an adjusting nut is screwed between the rear end of the positioning screw and the rear end surface of the tapered screw sleeve, and the internal thread of the adjusting nut cooperates with the external thread of the positioning screw; the outer tapered surface of the tapered screw sleeve Cooperate with the open taper sleeve, the rear end of the taper sleeve is threaded with a lock nut, which is used to push the open taper sleeve that matches the outer cone of the taper sleeve to move, and change the small outer circle of the open taper sleeve The diameter is dimensioned so as to produce a tight fit with the rear bore of the collet and lock the axial position.

The shape of the tapered screw sleeve is cylindrical, the axial center of the tapered screw sleeve is provided with a threaded through hole, and the outside is provided with a tapered section and a cylindrical section, the cylindrical section is located on the small end side of the tapered section, and the cylindrical section With external thread.

The shape of the open taper sleeve is a cylindrical step shape, and the inner cavity is a tapered hole, and its internal taper value is consistent with the external taper value of the taper screw sleeve; the axial length of the small outer circle of the cylindrical step of the open taper sleeve is at least The axial length of the large outer circle. The open taper sleeve has a milling groove on one side of the pipe wall in the axial direction to form a radial non-closed tube shape. The diameter of the small outer circle of the open taper sleeve in the free state is less than The tail inner hole of the spring collet and the step height drop between the large and small outer circles are smaller than the wall thickness of the tail of the spring collet.

The beneficial effects of the utility model:

The device of the utility model has simple structure, compactness, practicality and low production cost, and in production practice, it shows convenient clamping, flexible operation, can adapt to various shaft parts, has high precision, and can effectively ensure the accuracy of the required processing parts. length size requirements. The device solves the defect of difficult axial positioning of the spring collet by configuring a limit mechanism for the spring collet, and improves the quality and efficiency of batch processing of parts.

Description of drawings

Fig. 1 is the structural sectional view of the adjustable internal positioning device of the high-precision lathe collet of the utility model;

Fig. 2 is a structural schematic diagram of the device of the present invention installed in the collet.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 1 and 2, an adjustable internal positioning device for a high-precision lathe collet, including a taper sleeve 1, an open taper sleeve 2, a lock nut 3, a positioning screw 4, and an adjustment nut 5.

The taper screw sleeve 1 is threadedly connected to the positioning screw 4, an adjusting nut 5 is screwed between the rear end of the positioning screw 4 and the rear end face of the taper screw sleeve 1, and the internal thread of the adjusting nut 5 cooperates with the external thread of the positioning screw 4 for Adjust the length of the position where the positioning screw 4 is unscrewed from the lock nut 3; the outer tapered surface of the taper screw sleeve 1 is matched with the open taper sleeve 2, and the rear end of the taper screw sleeve 1 is threaded to connect the lock nut 3.

The shape of the tapered screw sleeve 1 is cylindrical, the axial center of the tapered screw sleeve 1 is provided with a threaded through hole, and the outside is provided with a tapered section and a cylindrical section, and the cylindrical section is located at the small end side of the tapered section, and the cylindrical section With external thread.

The shape of the open taper sleeve 2 is cylindrical and stepped, and the inner cavity is a tapered hole, and its internal taper value is consistent with the external taper value of the taper sleeve 1; the axial length of the small outer circle of the cylindrical step of the open taper sleeve 2 is greater than that The axial length of the outer circle. The open taper sleeve 2 has a milling groove on one side of the pipe wall in the axial direction to form a radial non-closed tube shape. The diameter of the small outer circle of the open taper sleeve 2 in a free state is smaller than the tail inner hole of the collet 8, which is larger 1. The step height drop between the small outer circles is smaller than the wall thickness of the tail of the collet 8 .

The lock nut 3 is a matching part of the taper sleeve, which cooperates with the external thread of the taper sleeve 1. Its function is to push the opening taper sleeve 2 that is matched with the outer cone of the taper sleeve 1 to move, and change the size of the opening taper sleeve 2. The diameter of the outer circle is such that it is tightly fitted with the inner hole at the rear of the collet 7, that is, the axial position is locked.

The positioning screw 4 is similar to a special long screw in shape, and its external thread cooperates with the internal thread of the adjusting nut 5 .

The internal thread of the adjustment nut 5 cooperates with the external thread of the positioning screw 4 to adjust the length of the position where the positioning screw 4 is unscrewed from the locking nut 3 .

As shown in Figure 2, the assembly and installation methods of the adjustable internal setting device are as follows:

Step 1: fit the inner cone of the open taper sleeve 2 into the outer cone of the taper sleeve 1;

Step 2: match the internal thread of the lock nut 3 with the external thread of the taper sleeve 1;

Step 3: Select the collet 8 according to the outer diameter of the workpiece;

Step 4: Push the components completed in steps 1 and 2 into the tail hole of the collet 8 to the limit, adjust the lock nut 3 to push the open taper sleeve 2 to move until the open taper sleeve 2 is locked in the spring In chuck 8 tail holes. Step 5: Rotate the adjusting screw 4 according to the axial dimension requirements of the processed workpiece 6, and lock the adjusting screw 4 with the adjusting nut 5;

Step 6: Fix the spring collet 8 installed with the adjustable internal fixing device in place on the main shaft 7 of the processing equipment, adjust the clamping force of the spring collet 8 and start the processing operation;

Step 7: Check the processing size of the first piece, repeat steps 4 to 7 according to the test results, and implement corrections.

Claims (3)

1. An adjustable internal positioning device for a high-precision lathe collet, including a taper sleeve (1), an open taper sleeve (2), a lock nut (3), a positioning screw (4), and an adjustment nut (5) , it is characterized in that: the inside of the tapered screw sleeve (1) is threadedly connected to the positioning screw (4), and an adjusting nut (5) is screwed between the rear end of the positioning screw (4) and the rear end surface of the tapered screw sleeve (1), The internal thread of the adjusting nut (5) cooperates with the external thread of the positioning screw (4), and the outer tapered surface of the taper screw sleeve (1) is matched with the open taper sleeve (2), and the taper screw sleeve (1) The rear end of the rear end is threadedly connected with a lock nut (3), which is used to push the open taper sleeve (2) that matches the outer cone of the taper sleeve (1) to move, and change the small outer circle of the open taper sleeve (2) The diameter is dimensioned so as to produce a tight fit with the tail inner hole of the collet (8), and the axial position is locked. 2. The adjustable internal positioning device for the collet chuck of a high-precision lathe according to claim 1, characterized in that: the shape of the tapered screw sleeve (1) is cylindrical, and the axial center of the tapered screw sleeve (1) is set There is a threaded through hole, and the outside is provided with a cone section and a cylinder section, the cylinder section is located at the small end side of the cone section, and the cylinder section is provided with an external thread. 3. The adjustable internal positioning device for high-precision lathe collets according to claim 1, characterized in that: the shape of the opening taper sleeve (2) is a cylindrical step shape, the inner cavity is a tapered hole, and the inner taper The value is consistent with the external taper value of the taper screw sleeve (1); the axial length of the small outer circle of the cylindrical step of the open taper sleeve (2) is greater than the axial length of the large outer circle, and the open taper sleeve (2) ) is axially opened with a pipe wall milling groove on one side to form a radial non-closed pipe type, and the diameter of the small outer circle of the open taper sleeve (2) in a free state is smaller than the tail inner hole of the collet (8) , the step height drop between the large and small outer circles is less than the tail wall thickness of the collet (8).