CN214816843U

CN214816843U - Slender shaft turning clamp with precise special-shaped handle

Info

Publication number: CN214816843U
Application number: CN202120696494.7U
Authority: CN
Inventors: 徐海昆; 兰超; 杨安帅; 舒飞
Original assignee: Kunming Honggu Machinery Manufacturing Co ltd
Current assignee: Kunming Honggu Machinery Manufacturing Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-11-23
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses an accurate dysmorphism handle slender axles turning anchor clamps, including the location base, the latch segment, locking screw, support the cover, the connecting portion of location base and lathe main shaft or chuck are connected and one end are equipped with the location portion of half-cylinder structure, the half-cylinder medial surface of location portion is equipped with the dysmorphism chamber and one side of fixing a position special-shaped handle and is equipped with the connection screw, the latch segment passes through locking screw and is connected with location portion, be equipped with the connecting thread section on the excircle of location portion, support the cover and establish first screw hole for cylindricality step pore structure and both ends branch, the supported hole, first screw hole is connected with the connecting thread section of location portion, the supported hole is coaxial with the location base and with the cooperation shaft section sliding fit of special-shaped slender axles handle. The utility model discloses a set up the location base of fixed special-shaped handle and support the support cover of slender axles, can strengthen the rigidity of slender axles, avoid cutter relieving or bullet to become and take place to guarantee the machining precision after the turning, have simple structure, the dismouting is simple and convenient, the support nature is good, the characteristics that the turning precision is high.

Description

Slender shaft turning clamp with precise special-shaped handle

Technical Field

The utility model belongs to the technical field of mechanical fixture, concretely relates to accurate dysmorphism handle slender axles turning anchor clamps that simple structure, dismouting are simple and convenient, the support nature is good, the turning precision is high.

Background

In the mechanical processing process, the length-diameter ratio L/d of a plurality of shaft parts is more than 20. The long diameter of the slender shaft is large, so that the slender shaft is poor in thermal diffusivity and large in linear expansion during turning, and under the multiple actions of centrifugal force, cutting force and tip jacking force during high-speed rotation, the transversely arranged slender shaft is easy to bend, vibrate and even lose stability, and satisfactory surface roughness and geometric accuracy cannot be obtained after processing. Therefore, when turning slender shafts, strict requirements are put on adjustment of a machine tool, application of auxiliary tools, cutters, cutting amount and the like.

For turning of slender shafts, two clamping methods are mainly adopted in the prior art: one uses one tip clamp and the other uses two tip clamps. Although the clamping mode of clamping one top is simple and convenient, if the top of the top tip is too tight, the slender shaft can be bent, and the heating elongation of the slender shaft during turning can be prevented, so that the slender shaft is axially extruded to generate bending deformation; and the clamping surfaces of the clamping jaws and the center hole are possibly not coaxial, and the clamping jaws are positioned excessively after clamping, so that the slender shaft is bent and deformed. In addition, although the workpiece is accurately positioned and the coaxiality is easily ensured in the two-center clamping mode, the slender shaft is clamped because the rigidity is poor after the clamping, the bending deformation of the slender shaft is large, and the vibration is easily generated, so that the two-center clamping mode is only suitable for clamping the workpiece with small length-diameter ratio, small machining allowance and high coaxiality requirement.

In order to solve the above problems, in the prior art, in the above technical solution or in the case of clamping the headstock, the tracking center frame is added in the middle to form a rigid support for the slender shaft, so as to counteract the cutting force acting on the slender shaft and suppress the vibration of the workpiece during high-speed rotation, thereby reducing or even eliminating the adverse effect of the cutting force on the shaft rod, and realizing precise machining. However, the tracking center frame is complex in structure and time-consuming to install and adjust, so that the turning efficiency is low, and the tracking center frame is only suitable for single-piece and small-batch machining. In addition, for clamping the slender shaft with the special-shaped handle, on the basis of the technical scheme, a plurality of parallel sizing blocks or special sizing blocks are adopted for assistance, and then a dial indicator is used for 'striking a meter and aligning' parts; due to the fact that the special-shaped handle is irregular in structure, the supporting surface in contact with the sizing block is small, the sizing block is not easy to place correctly, and clamping deflection is easy to cause. Therefore, in the prior art, the plate-type clamp is also provided with special-shaped notches correspondingly, the special-shaped notches are utilized to wrap and position the different-shaped handles so as to replace the use of cushion blocks with different heights and sizes for independent supporting, and then clamping and aligning are carried out; although the clamping efficiency and the machining precision are improved, the package positioning still needs to be adjusted and aligned for many times, the mass production efficiency is still low, and the expected effect can be achieved only by matching the auxiliary tracking center frame and the spire, so that the defects of the auxiliary tracking center frame and the spire can be inherited, and the turning efficiency and the precision of the auxiliary tracking center frame and the spire are still improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, dismouting are simple and convenient, the support nature is good, the accurate dysmorphism handle slender axles turning anchor clamps that the turning precision is high.

The purpose of the utility model is realized like this: including location base, latch segment, locking screw, support cover, the location base includes connecting portion, location portion, connecting portion are connected with lathe main shaft or chuck, location portion is the semi-cylindrical structure and sets up in the one end of connecting portion, the semi-cylindrical medial surface of location portion is provided with the dysmorphism chamber and one side of fixing a position dysmorphism handle and is provided with the connection screw, the latch segment is connected with location portion through the locking screw who passes the connection screw, be provided with connecting thread section on the semi-cylindrical structure excircle of location portion, support the cover and be provided with first screw hole, the other end for cylindricality stepped hole structure and one end and be provided with the brace hole, the first screw hole of support cover and the connecting thread section threaded connection of location portion, the brace hole is coaxial with the location base and with the slender axles of the cooperation shaft section sliding fit of dysmorphism handle.

The utility model has the advantages that:

1. the utility model has the advantages that the positioning base for fixing the special-shaped handle and the supporting sleeve for supporting the slender shaft are arranged, so that the slender shaft with the special-shaped handle can be turned only by being clamped by the utility model, and the defect of top clamping is avoided; the clamping and the supporting are integrated into a whole, so that the special-shaped handle slender shaft can be quickly and accurately fixed on a jaw of a machine tool, and the later alignment work is reduced or even avoided; the support sleeve is used for extending and supporting the slender shaft, so that the cutting force acting on the slender shaft is counteracted, the vibration of a workpiece during high-speed rotation is inhibited, the rigidity of the slender shaft is enhanced, the cutter back-off or elastic deformation is avoided, and the machining precision after turning is ensured.

2. The utility model can rapidly clamp and fix the opposite handle and the positioning base through the locking block and the locking screw; the supporting sleeve is connected to the positioning base through threads, so that the slender shaft can be effectively and rigidly supported, and the supporting position of the slender shaft can be flexibly adjusted according to needs, so that quick clamping and high-precision supporting are realized.

To sum up, the utility model has the characteristics of simple structure, dismouting are simple and convenient, the support nature is good, the turning precision is high.

Drawings

FIG. 1 is a schematic view of a structure of an elongate shaft with a special handle;

FIG. 2 is a schematic view of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a second schematic structural view of the present invention;

FIG. 5 is an exploded view of FIG. 4;

in the figure: 1-a positioning base, 11-a connecting part, 12-a positioning part, 12A-a special-shaped cavity, 12B-a connecting screw hole, 12C-a connecting screw thread section, 12D-a positioning groove, 12E-a replacement groove, 13-a flange plate, 2-a locking block, 3-a locking screw, 4-a support sleeve, 42-a support hole, 43-a second threaded hole, 44-a conical hole, 5-a positioning body, 6-a cylindrical support sleeve, 7-a conical support sleeve, 8-a special-shaped handle slender shaft and 81-an opposite handle.

Detailed Description

The present invention is further described with reference to the following drawings and examples, but the present invention is not limited thereto in any way, and any modification or improvement based on the teaching of the present invention is within the protection scope of the present invention.

As shown in fig. 1, 2 and 3, the utility model comprises a positioning base 1, a locking block 2, a locking screw 3 and a supporting sleeve 4, wherein the positioning base 1 comprises a connecting part 11 and a positioning part 12, the connecting part 11 is connected with a machine tool spindle or a chuck, the positioning part 12 is of a semi-cylindrical structure and is arranged at one end of the connecting part 11, the semi-cylindrical inner side surface of the positioning part 12 is provided with a special-shaped cavity 12A of a positioning special-shaped handle and one side is provided with a connecting screw hole 12B, the locking block 2 is connected with the positioning part 12 through the locking screw 3 passing through the connecting screw hole 12B, the excircle of the semi-cylindrical structure of the positioning part 12 is provided with a connecting screw thread section 12C, the supporting sleeve 4 is of a cylindrical step hole structure and one end is provided with a first screw hole, the other end is provided with a supporting hole 42, the first screw hole of the supporting sleeve 4 is in threaded connection with the connecting screw thread section 12C of the positioning part 12, the supporting hole 42 is coaxial with the positioning base 1 and is in sliding fit with a matching shaft section of the slender shaft with the special-shaped handle.

As shown in fig. 4 and 5, a positioning groove 12D extending axially and being recessed is provided on the inner side surface of the semi-cylinder of the positioning portion 12, a positioning body 5 is embedded or fixed by a bolt in the positioning groove 12D, a special-shaped cavity 12A for positioning a special-shaped handle is provided at an opening end of the inner side surface of the semi-cylinder of the positioning body 5 facing the positioning portion 12, and a connection screw hole 12B is provided on one side of the positioning groove 12D or one side of the special-shaped cavity 12A on the inner side surface of the semi-cylinder of the positioning portion 12.

The bottom of constant head tank 12D is square or arc, one side of constant head tank 12D is provided with to connecting portion 11 sunken just be less than the change recess 12E of whole width.

The bottom and the two sides of the positioning groove 12D are respectively provided with an adjusting screw hole communicated with the excircle of the positioning part 12, and an adjusting screw with an end part abutting against the positioning body 5 is arranged in the adjusting screw hole in a matching manner. The vertical and horizontal positions of the positioning body 5 in the positioning groove 12D can be finely adjusted by adjusting the adjusting screw, so that the slender shaft with the special-shaped handle can be conveniently aligned.

The connecting part 11 and the positioning part 12 are fixedly connected through a flange 13 at the end part.

A tapered hole 44 or a second threaded hole 43 is formed in one end of the first threaded hole of the support sleeve 4, a tapered support sleeve 7 is connected in the tapered hole 44 in a matching manner, and a support hole 42 is coaxially formed in the center of the tapered support sleeve 7; a cylindrical support sleeve 6 with threads arranged on the outer circle is fixedly connected in the second threaded hole 43, and a support hole 42 is coaxially arranged in the center of the cylindrical support sleeve 6.

And a lubricating coating of polytetrafluoroethylene, polyformaldehyde, polycarbonate, polyamide, chlorinated polyether, polyphenylene sulfide or polyterephthalate is arranged in the support hole 42.

The sum of the length of the shaped cavity 12A and the length of the first threaded hole is greater than the total length from one end of the shaped shank elongated shaft to the shaft segment in sliding fit with the support hole 42.

The utility model discloses the working process is as follows:

as shown in fig. 1, 2 and 3, according to the structure of the special handle 81 of the slender shaft 8 with special handle and the size of the slender shaft, the special-shaped cavity 12A and the support sleeve 4 of the positioning portion 12 corresponding to the positioning base 1 are designed and manufactured, and the corresponding pair of locking blocks 2 are designed and manufactured at the same time, and threads are correspondingly processed on the excircle of the positioning portion 12 and the inner hole of the support sleeve 4. When the special-shaped handle long shaft clamping device is used, the connecting portion 11 of the positioning base 1 is connected and fixed with a chuck of a lathe or a milling machine, then the special-shaped handle 81 of the special-shaped handle long shaft 8 is placed in the special-shaped cavity 12A of the positioning portion 12, the supporting surface of the special-shaped handle 81 is pressed by the locking block 2, then the locking screw 3 is screwed into the connecting screw hole 12B of the positioning base 1 to enable the locking block 2 to press the supporting surface of the special-shaped handle 81, finally the first screw hole of the supporting sleeve 4 is aligned and screwed into the connecting screw thread section 12C of the positioning portion 12, so that the matched shaft section of the special-shaped handle long shaft 8 slides through the supporting hole 42 of the supporting sleeve 4, and clamping of the special-shaped handle long shaft 8 is completed. And starting a lathe or a milling machine to process the corresponding shaft section of the special-shaped handle slender shaft 8 near the support hole 42. After the machining is finished, the whole turning process can be finished by disassembling according to the process.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a precision dysmorphism handle slender axles turning anchor clamps, its characterized in that includes location base (1), latch segment (2), locking screw (3), supports cover (4), location base (1) includes connecting portion (11), location portion (12), connecting portion (11) are connected with lathe main shaft or chuck, location portion (12) are the semi-cylindrical structure and set up in the one end of connecting portion (11), the semi-cylindrical medial surface of location portion (12) is provided with heterotypic chamber (12A) and one side of location dysmorphism handle and is provided with connection screw (12B), latch segment (2) are connected with location portion (12) through passing locking screw (3) of connecting screw (12B), be provided with connecting thread section (12C) on the semi-cylindrical structure excircle of location portion (12), support cover (4) are cylindricality step hole structure and one end and are provided with first screw hole, screw hole, The other end of the positioning base is provided with a supporting hole (42), a first threaded hole of the supporting sleeve (4) is in threaded connection with a connecting threaded section (12C) of the positioning part (12), and the supporting hole (42) is coaxial with the positioning base (1) and is in sliding fit with a matching shaft section of the special-shaped handle slender shaft.

2. The slender shaft turning clamp with the precise special-shaped handle as claimed in claim 1, wherein a positioning groove (12D) extending axially and being concave is formed in the inner side face of the semi-cylinder of the positioning portion (12), a positioning body (5) is embedded or fixed through a bolt in the positioning groove (12D), a special-shaped cavity (12A) for positioning the special-shaped handle is formed in the opening end of the inner side face of the semi-cylinder of the positioning body (5) facing the positioning portion (12), and a connecting screw hole (12B) is formed in one side of the positioning groove (12D) or one side of the special-shaped cavity (12A) of the positioning body (5) on the inner side of the semi-cylinder of the positioning portion (12).

3. The slender shaft turning clamp with the precise special-shaped handle as claimed in claim 2, wherein the bottom of the positioning groove (12D) is square or arc-shaped, and a replacement groove (12E) which is recessed towards the connecting part (11) and is smaller than the whole width is arranged on one side of the positioning groove (12D).

4. The slender shaft turning clamp with the precise special-shaped handle as claimed in claim 2, wherein the bottom and two sides of the positioning groove (12D) are respectively provided with an adjusting screw hole communicated with the excircle of the positioning part (12), and an adjusting screw with an end part abutting against the positioning body (5) is arranged in the adjusting screw hole in a matched manner.

5. The slender shaft turning clamp with the precise special-shaped handle as claimed in claim 1, wherein the connecting part (11) and the positioning part (12) are fixedly connected through a flange (13) at the end part.

6. The precise special-shaped handle slender shaft turning clamp as claimed in any one of claims 1 to 5, wherein the support sleeve (4) is provided with a tapered hole (44) or a second threaded hole (43) at one end of a first threaded hole, a tapered support sleeve (7) is connected in the tapered hole (44) in a matching manner, and a support hole (42) is coaxially arranged at the center of the tapered support sleeve (7); and a cylindrical support sleeve (6) with threads arranged on the outer circle is fixedly connected in the second threaded hole (43), and a support hole (42) is coaxially arranged in the center of the cylindrical support sleeve (6).

7. A turning clamp for slender shaft with precise shaped handle as claimed in claim 6, characterized in that said supporting hole (42) is provided with a lubricating coating of PTFE, POM, polycarbonate, polyamide, chlorinated polyether, polyphenylene sulfide or polyterephthalate.

8. The precise shaped shank elongated shaft turning fixture of claim 6 wherein the sum of the length of the shaped cavity (12A) and the length of the first threaded hole is greater than the total length of the shaped shank end of the shaped shank elongated shaft to the shaft section which is in sliding fit with the support hole (42).