CN113319602A

CN113319602A - Lathe fixture

Info

Publication number: CN113319602A
Application number: CN202110746608.9A
Authority: CN
Inventors: 魏将华
Original assignee: Shunking Precision Casting Shenzhen Co ltd
Current assignee: Shunking Precision Casting Shenzhen Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-08-31

Abstract

The invention is suitable for the field of tool fixtures, and provides a lathe fixture, which comprises: a fixed part connected to the lathe; the positioning assembly is arranged on the fixing part and used for positioning the workpiece; the tensioning unit is arranged in the fixing part and connected to a rotary oil cylinder on the lathe, and the rotary oil cylinder drives the tensioning unit to move in the fixing part when rotating; a workpiece fixing unit detachably connected to the tightening unit, the workpiece fixing unit pressing the workpiece against the fixing portion under the pulling of the tightening unit: the lathe fixture provided by the invention can be used for disassembling the workpiece only through the rotation of the rotary oil cylinder, so that the workpiece can be clamped simply and quickly.

Description

Lathe fixture

Technical Field

The invention belongs to the field of tool fixtures, and particularly relates to a lathe fixture.

Background

According to the principle of processing parts by a conventional numerical control lathe, a rotary oil cylinder of the lathe generates tensile force to drive a helical gear assembly in a chuck to rotate, and a gear set transmits the force to a clamping jaw to clamp the parts for processing.

When the outer circle of the part is machined by a desktop lathe, the inner hole of the part is tensioned by a lock nozzle and the part is tensioned, but the process has certain limitations that the part is small in thickness, small in inner hole bearing surface and low in machining precision, and the part is easy to machine and scrap. When the common lathe is used for machining the outer circle of the part, the screw penetrates through the inner hole of the part and is locked to be machined. The process needs to manually assemble and disassemble the screws during processing, and cannot realize automatic production. Accordingly, the present application provides a lathe fixture.

Disclosure of Invention

The invention provides a lathe fixture, and aims to solve the problem that the disassembly and assembly process is complicated when parts are machined by a lathe.

The present invention is achieved in that a turning attachment, which is mounted on a turning machine, for clamping a workpiece, includes:

a fixed part connected to the lathe;

the positioning assembly is arranged on the fixing part and used for positioning the workpiece;

the tensioning unit is arranged in the fixing part and connected to a rotary oil cylinder on the lathe, and the rotary oil cylinder drives the tensioning unit to move in the fixing part when rotating;

and the workpiece fixing unit is detachably connected with the tensioning unit and used for pressing the workpiece on the fixing part under the pulling of the tensioning unit.

Preferably, the workpiece fixing unit includes:

the pull rod is arranged at one end in the tensioning unit and is provided with a tensioning groove;

and the compression ring is arranged on the pull rod and is used for compressing the workpiece on the fixing part.

Preferably, the workpiece fixing unit further includes:

and the compression cover is fixedly connected to the compression ring and used for fixing the compression ring to the pull rod.

Preferably, the tightening unit includes:

the connecting flange is connected with the fixing part in a sliding manner and is connected with the rotary oil cylinder through threads;

and the clamping assembly is fixedly connected to the connecting flange and is used for clamping the pull rod.

Preferably, the clamping assembly comprises:

the tensioning connecting block is fixedly connected to the connecting flange;

the two groups of pull buckles are hinged to one end, far away from the connecting flange, of the tensioning connecting block, are arranged in a mirror image mode, stepped grooves penetrating through the pull buckles along the axis of the connecting flange are formed in the pull buckles, and first conical surfaces are arranged on the outer sides of the pull buckles and used for clamping the pull rod;

the braking flange is arranged in the fixing part, is in a cylindrical shape with openings at two ends and is used for tightly pressing the pull buckle on the pull rod;

the first spring is fixedly connected in the fixing part and used for pressing the braking flange on the pull buckle.

Preferably, a second spring is arranged between the two groups of the pulling buckles and used for opening the pulling buckles.

Preferably, the jig further comprises:

and the limiting component is arranged in the fixing part and is used for limiting the clamping component.

Preferably, the limiting assembly is a limiting sleeve fixedly connected in the fixing portion, and the limiting sleeve is in a cylindrical shape with openings at two ends.

Preferably, the positioning unit is a positioning flange fixedly connected to the housing, the positioning flange is provided with open-ended cylinders at two ends, a threaded head is arranged at one end of the positioning flange, a positioning cylinder is arranged at one end, away from the threaded head, of the positioning flange, and the positioning flange is detachably mounted on the housing.

Preferably, the jig further comprises:

and the error-proof pin is detachably connected to the fixed part and is used for placing the workpieces to be installed in a staggered mode.

Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:

compared with the prior art, the lathe clamp provided by the invention can be used for disassembling the workpiece only through the rotation of the rotary oil cylinder, so that the workpiece clamping work is simple and rapid, and the workpiece clamping efficiency is improved.

Drawings

FIG. 1 is an exploded view of a lathe fixture provided by the present invention;

FIG. 2 is a full sectional view of a lathe fixture provided by the present invention along its axis;

FIG. 3 is a schematic structural view of a lathe fixture provided by the present invention;

FIG. 4 is a schematic structural view of a tension link block in a lathe fixture according to the present invention;

FIG. 5 is a schematic structural view of a tab in a lathe fixture according to the present invention;

FIG. 6 is a schematic structural view of a stopping flange of a lathe fixture according to the present invention;

FIG. 7 is a schematic structural view of a positioning flange in a lathe fixture according to the present invention;

FIG. 8 is a schematic structural view of a fixing portion of a lathe fixture according to the present invention;

FIG. 9 is a schematic structural view of a workpiece fixing unit in a lathe fixture according to the present invention;

FIG. 10 is a schematic view of the installation of the tab and tensioning unit in a lathe fixture according to the present invention.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the present invention provides a lathe fixture, which is mounted on a lathe and used for clamping a workpiece 13, as shown in fig. 1 to 3, the fixture includes:

a fixed part connected to the lathe;

the positioning assembly is arranged on the fixing part and is used for positioning the workpiece 13;

a workpiece fixing unit detachably connected to the tightening unit, the workpiece fixing unit pressing the workpiece 13 against the fixing portion under the pulling of the tightening unit;

in this embodiment, when a workpiece 13 is installed, the workpiece fixing unit penetrates through the workpiece 13, one end of the workpiece fixing unit, which is far away from the workpiece 13, is inserted into the tensioning unit located in the fixing part, when the lathe rotating cylinder works, the lathe rotating cylinder pulls the tensioning unit to move in a direction far away from the workpiece 13, the tensioning unit holds the workpiece 13 fixing unit and drives the workpiece fixing unit to move in a direction far away from the workpiece 13, and the workpiece fixing unit presses the workpiece 13 against the fixing part when moving, wherein the positioning component positions the workpiece 13 during the process that the workpiece fixing unit presses the workpiece 13;

when the workpiece 13 is disassembled, the lathe rotating oil cylinder rotates reversely, the lathe rotating oil cylinder drives the tensioning unit to move towards the direction close to the workpiece 13, when the tensioning unit moves to a preset position, the tensioning unit loosens the workpiece fixing unit, the workpiece 13 and the workpiece fixing unit are disassembled from the fixing part, and the workpiece fixing unit is disassembled from the workpiece 13 so as to process the next workpiece 13.

In a further preferred embodiment of the present invention, as shown in fig. 1-3, the fixing portion further includes:

a housing 1 provided outside the tightening unit for connecting the fixing portion to a lathe;

in this embodiment, the housing 1 is provided with first fixing holes uniformly distributed circumferentially around the axis of the housing 1, and when the fixing portion is mounted on a lathe, bolts are inserted through the first fixing holes and fixed to the lathe, and the bolts fix the housing 1 to the lathe.

In a further preferred embodiment of the present invention, as shown in fig. 8, the workpiece fixing unit includes:

a tension groove is formed in one end, arranged in the tension unit, of the pull rod 6;

the compression ring 7 is arranged on the pull rod 6 and is used for compressing a workpiece 13 on the fixed part;

in this embodiment, the tie rod 6 is a round rod, and one end of the tie rod 6 away from the tensioning slot is provided with a ball head, and the ball head is used for preventing the clamp ring 7 from being separated from the tie rod 6 when the tensioning unit tensions the tie rod 6; the compression ring 7 is disc-shaped, and the tension rod 6 is sleeved with the compression ring 7, so that the compression ring 7 can be replaced and is used for adapting to workpieces 13 with different sizes;

as a preferable mode in this embodiment, the workpiece fixing unit further includes:

a clamp cover 16 fixedly connected to the clamp ring 7 for fixing the clamp ring 7 to the tie rod 6;

the compression ring 7 is disc-shaped, a second fixing hole is formed in the compression cover 16, the compression cover 16 is fixedly connected to the compression ring 7 through a screw, and the compression ring 7 and the compression cover 16 clamp the ball head, so that the pull rod 6 is fixed to the compression ring 7 and the compression cover 16;

in some examples, the drawing-in groove is annular, and one end of the pull rod 6 provided with the tensioning groove is provided with a chamfer so as to facilitate the insertion of the pull rod 6 into the fixing part;

when the workpiece 13 is installed, the pull rod 6 passes through the installation hole on the workpiece 13, the pull rod 6 is inserted into the fixing part, when the workpiece fixing unit is tensioned by the tensioning unit, the tensioning unit clamps the tensioning groove, when the tensioning unit moves, the compression ring 7 is tensioned by the pull rod 6, and the workpiece 13 is compressed on the fixing part by the compression ring 7.

In a further preferred embodiment of the present invention, as shown in fig. 1 to 3, the tension unit comprises:

the connecting flange 2 is connected with the fixing part in a sliding mode, and the connecting flange 2 is connected with the rotary oil cylinder through threads;

the clamping assembly is fixedly connected to the connecting flange 2 and is used for clamping the pull rod 6;

in this embodiment, when the rotary cylinder rotates, because the rotary cylinder is connected with the connecting flange 2 through threads, the rotary cylinder drives the connecting flange 2 to move along the axis of the rotary cylinder in the rotating process, for example, when the rotary cylinder rotates forward, the connecting flange 2 moves away from the workpiece 13 under the driving of the rotary cylinder, and when the rotary cylinder rotates reversely, the connecting flange 2 moves close to the workpiece 13 under the driving of the rotary cylinder;

in some examples, the connecting flange 2 is a cylinder with an opening at one end, and the connecting flange 2 is provided with an internal thread matched with the rotary cylinder.

In a further preferred embodiment of the present invention, as shown in fig. 1-3, the clamping assembly comprises:

the tensioning connecting block 3 is fixedly connected to the connecting flange 2;

the two groups of pull buckles 4 are hinged to one end, far away from the connecting flange 2, of the tensioning connecting block 3, the pull buckles 4 are arranged in a mirror mode, stepped grooves penetrating through the pull buckles 4 along the axis of the connecting flange 2 are formed in the pull buckles 4, and first conical surfaces are arranged on the outer sides of the pull buckles 4 and used for clamping the pull rod 6;

the braking flange 8 is arranged in the fixing part, the braking flange 8 is in a cylindrical shape with openings at two ends, and a second conical surface is arranged at the opening part of one end, close to the pull buckle 4, of the braking flange 8 and is used for pressing the pull buckle 4 on the pull rod 6;

the first spring 11 is fixedly connected in the fixed part and is used for pressing the brake flange 8 on the pull buckle 4;

referring to fig. 10, in this embodiment, when the pull rod 6 is inserted into the fixing portion, the pull rod 6 is disposed in the stepped groove, when the connecting flange 2 is driven by the rotary cylinder to move in a direction away from the workpiece 13, the connecting flange 2 pulls the pull buckle 4 to move in a direction away from the workpiece 13 through the tightening connection block 3, when the first conical surface on the pull buckle 4 contacts the second conical surface on the braking flange 8, the braking flange 8 presses the pull buckle 4, so that the two sets of pull buckles 4 approach each other, the two sets of pull buckles 4 are clamped in the pull-in grooves on the pull rod 6, and when the connecting flange 2 continues to move, the connecting flange 2 pulls the pull rod 6 to move in the fixing portion through the tightening connection block 3 and the pull buckle 4, so as to drive the clamp ring 7 to press the workpiece 13 on the fixing portion, under the action of the first spring 11, the braking flange 8 is pressed against the tab 4 all the time, and as the distance between the connecting flange 2 and the workpiece 13 increases, the pressure of the first spring 11 increases gradually, the pressure between the braking flange 8 and the tab 4 increases gradually, and the clamping force component of the tab 4 on the pull rod 6 increases, so that the pull rod 6 can be prevented from being disengaged from the tab 4;

when the rotary oil cylinder rotates reversely, the connecting flange 2 moves towards the direction close to the workpiece 13, the connecting flange 2 pushes the braking flange 8 to move towards the direction close to the workpiece 13, when the braking flange 8 moves to a preset distance, the pull buckle 4 is separated from the braking flange 8, the pressure between the pull buckle 4 and the pull rod 6 disappears, and the pull rod 6 can be separated from the two groups of pull buckles 4, so that the pull rod 6 can be taken out;

referring to fig. 4, the tensioning connecting block 3 is cylindrical, the tensioning connecting block 3 is fixedly connected to the connecting flange 2 through a bolt, a U-shaped hinge groove is formed in one end of the tensioning connecting block 3 away from the connecting flange 2, and the pull buckle 4 is hinged in the hinge groove through a pin 14;

referring to fig. 5, the stepped groove of the tab 4 is semicircular, the tab 4 is provided with a pin hole, and two groups of tabs 4 form a vertebral body structure when being attached;

as a preferable mode in this embodiment, a second spring 15 is further disposed between the two sets of the tabs 4, and is used for expanding the tabs 4;

when the pull buckle 4 is attached to the braking flange 8, the pull buckle 4 compresses the second spring 15, and when the pull buckle 4 is separated from the braking flange 8, the two groups of pull buckles 4 are opened under the action of the elastic force of the second spring 15, so that the pull rod 6 can be conveniently taken out of the pull buckle 4;

referring to fig. 6, the braking flange 8 is a cylinder with openings at two ends, and an outer retaining ring is arranged at one end of the braking flange 8 away from the second inclined plane;

in this embodiment, a stepped hole is formed in the housing 1, a spring seat 10 is fixedly connected to the housing 1, and the spring seat 10 is disposed at an end of the first spring 11 away from the braking flange 8, and is used for preventing the first spring 11 from being separated from the housing 1; when the braking flange 8 moves to a preset position, the stepped hole in the spring seat 10 can block the braking flange 8, so that the tab 4 can be separated from the braking flange 8 under the driving of the connecting flange 2;

in some examples, the spring seat 10 is fixedly attached to the inside of the housing 1 by screws.

In a further preferred embodiment of the present invention, as shown in fig. 1 to 3, the jig further comprises:

the limiting component is arranged in the fixing part and used for limiting the clamping component and preventing the clamping component from being separated from the fixing part;

in this embodiment, the limiting assembly is a limiting sleeve 9 fixedly connected in the fixing portion, the limiting sleeve 9 is in a cylindrical shape with openings at two ends, and the limiting sleeve 9 is fixedly connected in the housing 1 through interference fit;

when the brake flange 8 is driven by the connecting flange 2 to move in a direction away from the workpiece 13, the limiting sleeve 9 can block the brake flange 8, so that the brake flange 8 moves to a preset position, and as the spring seat 10 is fixed in the shell 1, the spring seat 10 can block the limiting sleeve 9 to move in the shell 1, so that the limiting sleeve 9 can play a limiting role.

In a further preferred embodiment of the present invention, as shown in fig. 7 and 8, the positioning unit is a positioning flange 5 fixedly connected to the housing 1, the positioning flange 5 is a cylinder with openings at two ends, a screw head is arranged at one end of the positioning flange 5, a positioning cylinder is arranged at one end of the positioning flange 5 away from the screw head, and the positioning flange 5 is detachably mounted on the housing 1 through screw connection, so that the positioning flange 5 is convenient to replace, and the fixture provided by the present invention can be adapted to workpieces 13 of different models.

In a further preferred embodiment of the present invention, as shown in fig. 8, the clamp further comprises:

a mistake-proofing pin 12 detachably connected to the fixing part for placing the workpiece 13 for installation in a wrong position;

in this embodiment, an external thread is disposed at one end of the error-proof pin 12, and the error-proof pin 12 is installed on the housing 1 through a threaded connection;

in some examples, the error-proofing pin 12 may also be mounted on the housing 1 by interference fit.

In summary, the present invention provides a lathe fixture, comprising:

a fixed part connected to the lathe;

compared with the prior art, the lathe fixture provided by the invention can be used for dismounting the workpiece 13 only by rotating the rotary oil cylinder, so that the workpiece 13 can be simply and quickly clamped, and the clamping efficiency of the workpiece 13 is improved.

It should be noted that, for simplicity of description, the above-mentioned embodiments are described as a series of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above examples are only used to illustrate the technical solutions of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, fall within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.

Claims

1. The utility model provides a lathe fixture, installs on the lathe for press from both sides tight work piece, its characterized in that includes:

a fixed part connected to the lathe;

2. The lathe jig of claim 1, wherein the workpiece holding unit comprises:

3. The lathe jig of claim 2, wherein the workpiece holding unit further comprises:

4. The lathe jig of claim 2, wherein the tightening unit comprises:

5. The lathe fixture of claim 4, wherein the clamping assembly comprises:

the tensioning connecting block is fixedly connected to the connecting flange;

6. The lathe fixture of claim 5, wherein a second spring is disposed between the two sets of the tabs for expanding the tabs.

7. The lathe fixture of claim 4, wherein the fixture further comprises:

8. The turning attachment of claim 7, wherein the stop member is a stop collar fixedly attached to the fixed portion, the stop collar having a cylindrical shape with openings at opposite ends thereof.

9. The turning attachment as claimed in any one of claims 1 to 8, wherein the positioning unit is a positioning flange fixedly attached to the housing, the positioning flange is cylindrical with openings at both ends, a threaded head is provided at one end of the positioning flange, a positioning cylinder is provided at an end of the positioning flange remote from the threaded head, and the positioning flange is detachably attached to the housing.

10. A lathe fixture according to any one of claims 1 to 8, wherein the fixture further comprises: