Efficient clamping combination device for small-diameter cylindrical part

Abstract

The invention belongs to the technical field of mechanical manufacturing and cold machining, and particularly relates to a small-diameter cylindrical part efficient clamping combination device which comprises a base, an elastic chuck, a part and a locking nut. The part is a small-diameter cylindrical part to be clamped and is installed in an installation hole in the center of the elastic chuck, and the part and the elastic chuck are installed in an inner taper hole of the base together. The inner conical surface and the inner thread of the locking nut are respectively matched and connected with the outer conical surface of the elastic chuck and the outer thread of the base; the base is fixed, when the locking nut is rotated, the locking nut moves axially, the generated external force enables the mounting hole in the center of the elastic chuck to generate elastic deformation and contract, and a part is clamped; when the part is disassembled, the locking nut is rotated in the opposite direction, the hole diameter of the mounting hole in the center of the elastic chuck is enlarged, and the part can be disassembled. The clamping mode is reliable in positioning, convenient to operate and high in operability.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical manufacturing cold processing technology, and specifically relates to a high-efficiency clamping assembly device for small-diameter cylindrical parts. With this assembly device, it is convenient to realize the following Figure 1 The pin and shaft parts with cylindrical end surface features are clamped efficiently, which is convenient for machining. The clamping device can shorten the auxiliary time of tooling changeover, significantly improve the overall machining efficiency of parts, and has strong operability. The combined device has a simple structure and low manufacturing cost. Background Art

[0002] Usually, when machining the end face features of small-diameter cylindrical pins and shaft parts on milling machines, CNC milling machines or machining centers, the main clamping method used is a universal clamp, a three-jaw self-centering chuck, that is, the three jaws are used to clamp the workpiece from the radial direction at the same time, and the machining of a part is completed in one clamping. However, for the machining of some small-diameter cylindrical end face features, due to the influence of the end face width of the clamping part of the front section of the jaws and the wear and tear of daily use, the use of the above clamping method will result in inaccurate clamping positioning, or even the situation where the cylindrical diameter is too small to be clamped. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is: how to provide a combined device which can realize the circumferential and radial clamping of small-diameter column and pin-like parts.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention provides a small-diameter cylindrical parts high-efficiency clamping assembly device, the assembly device comprises: a base, an elastic chuck, parts and a locking nut;

[0007] The part is a small-diameter cylindrical part to be clamped, which is installed in the mounting hole in the center of the elastic chuck, and the two are installed together in the inner tapered hole of the base;

[0008] The inner conical surface and the inner thread of the locking nut are respectively matched and connected with the outer conical surface of the elastic chuck and the outer thread of the base;

[0009] The base is fixed. When the locking nut is rotated, the locking nut is axially displaced. The external force generated causes the mounting hole in the center of the elastic chuck to deform elastically and shrink, and the part is clamped.

[0010] When disassembling parts, rotate the locking nut in the opposite direction, the diameter of the mounting hole in the center of the elastic collet becomes larger, and the parts can be disassembled. This clamping method has reliable positioning, convenient operation and strong operability.

[0011] The combined device achieves matching connection by using the inner tapered hole and outer thread prefabricated on the base, the outer tapered surface of the elastic chuck, the central mounting hole, the outer cylindrical surface of the part, the inner tapered surface of the locking nut and the inner thread.

[0012] The lower end of the base is made into a clamping part for positioning and clamping, and the clamping part is processed into a cube or a cylinder, and the lower bottom surface is kept flat;

[0013] A transition cylinder, a tool withdrawal groove and a connecting external thread are arranged above the clamping part, and a positioning inner conical surface is processed inside the upper end. The center of the positioning inner conical surface and each part coincides with the center of the part. The positioning inner conical surface is used to cooperate with the outer conical surface of the elastic chuck, and the connecting external thread is used to cooperate and connect with the inner thread of the locking nut.

[0014] The clamping portion of the base is 10-15 mm long, the connecting external thread is M24, the positioning inner cone angle is 16°, and the total length of the base is 50-60 mm.

[0015] Among them, a larger through hole is set in the center of the locking nut to accommodate the installation space of the elastic chuck. An internal thread is processed inside the locking nut to maintain a matching relationship with the external thread of the base. An inner conical surface is processed at the upper end of the locking nut to maintain a matching relationship with the outer conical surface at the upper end of the elastic chuck.

[0016] Among them, the outer surface of the locking nut is processed with six sides or evenly distributed half-open grooves, which are used for installing and removing the locking nut thread using tools.

[0017] Wherein, the internal thread of the locking nut is M24.

[0018] Wherein, the inner conical surface of the locking nut has a conical surface angle of 60°.

[0019] Among them, the elastic chuck is in the shape of a date pit as a whole, with outer conical surfaces on the top and the bottom, and mounting holes of different rules in the center, and the mounting hole in the center is used to install parts; and axial through grooves are evenly distributed on the wall surface of the elastic chuck, so that the elastic chuck can shrink or expand as a whole with external force, thereby realizing the change of the aperture of the mounting hole in the center.

[0020] The device is implemented in the following manner:

[0021] First, a base is made that can match the outer conical surface of the elastic chuck. At the lower end of the base, a clamping part that can be fixedly installed on the machine tool accessories is provided. The outer end of the cylindrical shape of the base is made of an external thread that is compatible with the locking nut, and the inner conical surface that is compatible with the elastic chuck is made inside.

[0022] Secondly, make an elastic chuck in the shape of a date pit, with the top and bottom being outer cones, and a mounting hole in the center that can realize different rules;

[0023] Next, a locking nut is manufactured with an internal thread, an internal cone surface and a center hole adapted to the base;

[0024] In this way, insert the part into the mounting hole in the center of the elastic collet, and then put it into the inner cone of the base, screw on the locking nut clockwise, the conical surface of the locking nut and the conical surface of the elastic collet are squeezed, so that the central mounting hole of the elastic collet shrinks, and the part can be clamped. Rotate the locking nut counterclockwise and the part can be removed.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the clamping method of the present invention has reliable positioning, convenient operation and strong operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The object of the present invention is a three-dimensional structural diagram of a small-diameter cylindrical part.

[0028] Figure 2 It is a three-dimensional structural diagram of the base of the present invention, which is composed of a clamping part at the lower end and an inner conical surface and an outer thread at the upper end.

[0029] Figure 3 It is a three-dimensional structural diagram of the elastic chuck of the combined device of the present invention, which is composed of upper and lower outer cone surfaces and a center hole.

[0030] Figure 4 It is a three-dimensional structural diagram of the locking nut of the combined device of the present invention, which is composed of an external tightening hexagonal body or an open groove and an inner cone surface and an inner thread.

[0031] Figure 5 It is a working schematic diagram of the combined device of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0033] In order to solve the above technical problems, the present invention provides a small-diameter cylindrical parts high-efficiency clamping assembly device, the assembly device comprises: a base, an elastic chuck, parts and a locking nut;

[0034] The part is a small-diameter cylindrical part to be clamped, which is installed in the mounting hole in the center of the elastic chuck, and the two are installed together in the inner tapered hole of the base;

[0035] The inner conical surface and the inner thread of the locking nut are respectively matched and connected with the outer conical surface of the elastic chuck and the outer thread of the base;

[0036] The base is fixed. When the locking nut is rotated, the locking nut is axially displaced. The external force generated causes the mounting hole in the center of the elastic chuck to deform elastically and shrink, and the part is clamped.

[0037] When disassembling parts, rotate the locking nut in the opposite direction, the diameter of the mounting hole in the center of the elastic collet becomes larger, and the parts can be disassembled. This clamping method has reliable positioning, convenient operation and strong operability.

[0038] The combined device achieves matching connection by using the inner tapered hole and outer thread prefabricated on the base, the outer tapered surface of the elastic chuck, the central mounting hole, the outer cylindrical surface of the part, the inner tapered surface of the locking nut and the inner thread.

[0039] The lower end of the base is made into a clamping part for positioning and clamping, and the clamping part is processed into a cube or a cylinder, and the lower bottom surface is kept flat;

[0040] A transition cylinder, a tool withdrawal groove and a connecting external thread are arranged above the clamping part, and a positioning inner conical surface is processed inside the upper end. The center of the positioning inner conical surface and each part coincides with the center of the part. The positioning inner conical surface is used to cooperate with the outer conical surface of the elastic chuck, and the connecting external thread is used to cooperate and connect with the inner thread of the locking nut.

[0041] The clamping portion of the base is 10-15 mm long, the connecting external thread is M24, the positioning inner cone angle is 16°, and the total length of the base is 50-60 mm.

[0042] Among them, a larger through hole is set in the center of the locking nut to accommodate the installation space of the elastic chuck. An internal thread is processed inside the locking nut to maintain a matching relationship with the external thread of the base. An inner conical surface is processed at the upper end of the locking nut to maintain a matching relationship with the outer conical surface at the upper end of the elastic chuck.

[0043] Among them, the outer surface of the locking nut is processed with six sides or evenly distributed half-open grooves, which are used for installing and removing the locking nut thread using tools.

[0044] Wherein, the internal thread of the locking nut is M24.

[0045] Wherein, the inner conical surface of the locking nut has a conical surface angle of 60°.

[0046] Among them, the elastic chuck is in the shape of a date pit as a whole, with outer conical surfaces on the top and the bottom, and mounting holes of different rules in the center, and the mounting hole in the center is used to install parts; and axial through grooves are evenly distributed on the wall surface of the elastic chuck, so that the elastic chuck can shrink or expand as a whole with external force, thereby realizing the change of the aperture of the mounting hole in the center.

[0047] The device is implemented in the following manner:

[0048] First, a base is made that can match the outer conical surface of the elastic chuck. At the lower end of the base, a clamping part that can be fixedly installed on the machine tool accessories is provided. The outer end of the cylindrical shape of the base is made of an external thread that is compatible with the locking nut, and the inner conical surface that is compatible with the elastic chuck is made inside.

[0049] Secondly, make an elastic chuck in the shape of a date pit, with the top and bottom being outer cones, and a mounting hole in the center that can realize different rules;

[0050] Next, a locking nut is manufactured with an internal thread, an internal cone surface and a center hole adapted to the base;

[0051] In this way, insert the part into the mounting hole in the center of the elastic collet, and then put it into the inner cone of the base, screw on the locking nut clockwise, the conical surface of the locking nut and the conical surface of the elastic collet are squeezed, so that the central mounting hole of the elastic collet shrinks, and the part can be clamped. Rotate the locking nut counterclockwise and the part can be removed.

[0052] Example 1

[0053] This embodiment refers to Figure 2 First, a clamping part for positioning and clamping is made at the lower end of the base, which is processed into a cube or a cylinder, and the lower bottom surface is kept flat. Then, a transition cylinder, a back cutter groove and a connecting external thread are made above the clamping part, and a positioning inner cone surface is processed inside the upper end. The center of the positioning inner cone surface and each part coincides with the center of the part. The positioning inner cone surface is used to cooperate with the outer cone surface of the elastic chuck, and the connecting external thread is used to cooperate and connect with the inner thread of the locking nut, such as Figure 2 The specific requirements are: the length of the clamping part is 10-15mm, the connecting external thread is based on the part size, generally M24, the positioning inner cone angle is 16°, and the total length of the base is 50-60mm. Figure 3 , and then make an elastic chuck, the overall shape is a date core shape, the outer cone surface of the lower end is large at the top and small at the bottom, the cone angle is 16°, a middle groove is processed at the large end of the cone, and the groove is connected to the outer cone surface of the upper end, the upper end is small and the lower end is large, the cone angle is 60°, and the center is processed with a central through hole that is adapted to the outer cylindrical diameter of the part, and the diameter is generally 0.2-2mm larger than the diameter of the part. Multiple elastic chucks of different specifications and sizes can be made according to the diameter of the part, such as Etc., there are 1-1.2mm uniformly distributed narrow grooves on the circumference of the elastic chuck, which are used for elastic deformation when squeezed. The center of each part and the center hole are required to coincide to ensure the clamping accuracy, such as Figure 3 The elastic collet is compatible with common ER collets on the market and has good versatility. Figure 4 , and then make a locking nut. A larger through hole is made in the center of the nut to accommodate the installation space of the elastic collet. An internal thread is processed inside, generally M24, to maintain a matching relationship with the external thread of the base. An inner conical surface is processed at the upper end of the interior, and the conical surface angle is 60°, to maintain a matching relationship with the outer conical surface at the upper end of the elastic collet. The outside of the nut is processed with six sides or evenly distributed half-open grooves, which are used to install and remove the locking nut thread using tools.

[0054] The specific working process is as follows: First, fix the lower end of the base to the machine tool accessories such as flat-nose pliers and chucks. Secondly, install the elastic collet into the locking nut so that the inner cone surface at the upper end of the locking nut and the outer cone surface at the upper end of the elastic collet maintain a matching relationship. Adjust the positions of the two and ensure that the centers of the two coincide. Next, install the locking nut together with the elastic collet into the base, adjust the position and rotate the locking nut clockwise so that the outer cone surface at the lower end of the elastic collet maintains a matching relationship with the inner cone surface of the base positioning. At the same time, the inner thread of the locking nut is matched with the outer thread of the base connection. The thread connection is partly sufficient, and the locking nut, the elastic collet and the base are kept in a free and relaxed state. Again, install the part into the center hole of the elastic collet and adjust the upper and lower height positions. Finally, rotate the locking nut clockwise so that the matching cone surfaces of the locking nut and the elastic collet are squeezed by external force, so that the center hole of the elastic collet is elastically deformed and gradually reduced until the part is clamped. After the processing is completed, rotate the locking nut counterclockwise. When the elastic chuck returns to a free state, the workpiece can be disassembled or replaced.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An efficient clamping assembly device for small diameter cylindrical parts, characterized in that: The combined device comprises: a base, an elastic chuck, parts and a locking nut; The part is a small-diameter cylindrical part to be clamped, which is installed in the mounting hole in the center of the elastic chuck, and the two are installed together in the inner tapered hole of the base; The inner conical surface and the inner thread of the locking nut are respectively matched and connected with the outer conical surface of the elastic collet and the outer thread of the base; The base is fixed. When the locking nut is rotated, the locking nut is axially displaced. The external force generated causes the mounting hole in the center of the elastic chuck to deform elastically and shrink, and the part is clamped. When disassembling parts, rotate the locking nut in the opposite direction, the diameter of the mounting hole in the center of the elastic collet will become larger, and the parts can be disassembled.

2. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 1, characterized in that: The combined device realizes matching connection by using the inner tapered hole and outer thread prefabricated on the base, the outer tapered surface of the elastic chuck, the central mounting hole, the outer cylindrical surface of the part, the inner tapered surface of the locking nut and the inner thread.

3. The high-efficiency clamping assembly device for small-diameter cylindrical parts according to claim 1, characterized in that: The lower end of the base is made into a clamping part for positioning and clamping, and the clamping part is processed into a cube or a cylinder, and the lower bottom surface is kept flat; A transition cylinder, a tool withdrawal groove and a connecting external thread are arranged above the clamping part, and a positioning inner conical surface is processed inside the upper end. The positioning inner conical surface coincides with the center of the part, the positioning inner conical surface is used to cooperate with the outer conical surface of the elastic chuck, and the connecting external thread is used to cooperate and connect with the inner thread of the locking nut.

4. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 3, characterized in that: The clamping portion of the base is 10-15 mm long, the connecting external thread is M24, the positioning inner cone angle is 16°, and the total length of the base is 50-60 mm.

5. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 3, characterized in that: A larger through hole is provided at the center of the locking nut to accommodate the installation space of the elastic chuck. An internal thread is processed inside the locking nut to maintain a matching relationship with the external thread of the base. An inner conical surface is processed at the upper end of the locking nut to maintain a matching relationship with the outer conical surface at the upper end of the elastic chuck.

6. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 5, characterized in that: The outer surface of the locking nut is processed with six sides or evenly distributed half-open grooves for installing and removing the locking nut thread using tools.

7. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 5, characterized in that: The internal thread of the locking nut is M24.

8. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 5, characterized in that: The inner conical surface of the locking nut has a conical surface angle of 60°.

9. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 5, characterized in that: The elastic chuck is in the shape of a date pit as a whole, with outer conical surfaces on the top and the bottom, and mounting holes of different rules in the center, and the mounting hole in the center is used to install parts; and axial through grooves are evenly distributed on the wall surface of the elastic chuck, so that the elastic chuck can be contracted or expanded as a whole with external force, thereby realizing the change of the aperture of the mounting hole in the center.

10. The small diameter cylindrical parts high efficiency clamping assembly device as claimed in claim 9, characterized in that: The device is implemented in the following manner: First, a base is made that can match the outer conical surface of the elastic collet. At the lower end of the base, a clamping part that can be fixedly installed on the machine tool accessories is provided. At the upper end of the cylindrical shape of the base, an external thread that is compatible with the locking nut is made on the outside, and an inner conical surface that is compatible with the elastic collet is made on the inside. Secondly, make an elastic chuck in the shape of a date pit, with the top and bottom being outer cones, and a mounting hole in the center that can realize different rules; Next, a locking nut is manufactured with an internal thread, an internal cone surface and a center hole adapted to the base; In this way, insert the part into the mounting hole in the center of the elastic collet, and then put it into the inner cone of the base, screw on the locking nut clockwise, the conical surface of the locking nut and the conical surface of the elastic collet are squeezed, so that the central mounting hole of the elastic collet shrinks, and the part can be clamped. Rotate the locking nut counterclockwise and the part can be removed.

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