CN218487821U

CN218487821U - Multi-station milling machine fixture

Info

Publication number: CN218487821U
Application number: CN202222666422.5U
Authority: CN
Inventors: 王志成; 王其; 季燕青
Original assignee: Jiangsu Baojie Automobile Components And Parts Forging Co ltd
Current assignee: Jiangsu Baojie Automobile Components And Parts Forging Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-02-17
Anticipated expiration: 2032-10-10

Abstract

The utility model relates to a multi-station milling machine fixture, which comprises a base arranged on a milling machine, a driving source, a driving cylinder and a clamping device connected with the driving cylinder, wherein the driving source and the driving cylinder are arranged below the base; the clamping device comprises a mounting seat connected to the base, a tensioning sleeve of which the lower part is connected to the mounting seat, and a mandrel capable of sliding up and down relative to the tensioning sleeve, wherein the mandrel comprises a shaft part of which the bottom is connected with the driving cylinder and a tensioning block positioned at the top of the shaft part, and the tensioning block is provided with a first matching surface; the tensioning sleeve is provided with at least two pressing parts, and the pressing parts are provided with second matching surfaces matched with the first matching surfaces; the clamping device has a working state and a releasing state, when in the working state, the mandrel moves downwards relative to the releasing state, and the pressing parts are more opened relative to each other than when in the releasing state; a valve is arranged on a pipeline connecting the driving source and the driving cylinder. The clamp can clamp a plurality of parts at a time, effectively improves the machining efficiency and the working efficiency of workers, and is high in clamping precision/stability/positioning accuracy.

Description

Multi-station milling machine fixture

Technical Field

The utility model belongs to the technical field of the machine tooling, concretely relates to multistation milling machine fixture.

Background

For conventional milling groove parts, due to the limitation of the existing machining tool structure, the parts can be machined only by single piece, the machining efficiency is extremely low, workers need to continuously perform disassembling and clamping actions, the labor intensity is high, and then the workers are easy to get into a fatigue operation state, so that the parts are scrapped due to the fact that the clamping process is not in place due to human factors.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multistation milling machine fixture.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a multistation milling machine fixture, it is including setting up base, driving source, a plurality of driving cylinder of being connected with the driving source on the milling machine, the clamping device of being connected with a plurality of driving cylinder one-to-ones, and driving source, driving cylinder all set up in the base below, are provided with the valve on the pipeline that driving source and each driving cylinder are connected respectively. The drive source may be a hydraulic, pneumatic or other drive source, and the drive cylinder may be a hydraulic cylinder, or an air cylinder. Through setting up the valve, a plurality of clamping devices can open and close simultaneously, also can open and close alone.

The clamping device comprises a mounting seat fixedly arranged on the base and provided with a through hole, a tensioning sleeve fixedly connected to the lower portion of the base in the through hole, and a mandrel which is arranged on the inner side of the tensioning sleeve and can slide up and down relative to the tensioning sleeve, wherein the mandrel comprises a shaft portion and a tensioning block, the bottom of the shaft portion is fixedly connected with a piston rod of a corresponding driving cylinder, the tensioning block is connected to the top of the shaft portion, the tensioning block is in a circular truncated cone shape, the upper end face of the tensioning block is larger than the lower end face of the tensioning block, and the side face of the circular truncated cone shape is a first matching face. The upper portion of the tensioning sleeve is provided with at least two pressing portions which extend out of the through hole and are arranged at intervals, and the inner side of each pressing portion is provided with a second matching surface which can be matched with the first matching surface and is in sliding contact with the first matching surface. Each clamping device has a working state and a release state, when the clamping device is in the working state, the mandrel moves downwards relative to the release state, and at least two pressing parts are opened relative to each other compared with the release state, wherein the opening not only is the distance between the pressing parts in the circumferential direction of the mandrel increased, but also includes the distance between the pressing parts in the radial direction of the mandrel increased. The directional terms above and below refer to the side facing the direction of the mandrel axis and the term "inner" refers to the side opposite the side facing the direction of the mandrel axis.

The operating principle of the multi-station milling machine fixture is that the mandrel moves along with a piston rod of the driving cylinder, when the mandrel is in a release state, the first matching surface does not apply an outward acting force to the second matching surface, the compressing portion and the compressing portion do not open relatively, the inner hole of a part is sleeved outside the compressing portion, the inner hole of the part is in clearance fit with the compressing portion, the driving cylinder drives the mandrel to move downwards, when the mandrel is in a working state, the first matching surface applies an outward acting force to the second matching surface, the compressing portion and the compressing portion open relatively, the compressing portion is in interference fit with the inner hole of the part, and the rotating friction force of the inner holes of the compressing portion and the part is increased to realize part clamping.

Furthermore, the second matching surface is positioned on the inner wall of the tensioning sleeve, and the second matching surface is an inclined surface which is inclined from top to bottom and gradually towards the central line.

Further, the second matching surfaces of all the pressing parts are on the same conical surface.

Furthermore, all the pressing parts are arranged in an annular array by taking the axial lead of the mandrel as the center.

Further, the tensioning sleeve is integrally formed.

Further, the outer diameter of the shaft part is matched with the inner diameter of the lower part of the tensioning sleeve.

Because above-mentioned technical scheme application, multistation milling machine fixture has following advantage:

a plurality of parts can be clamped at one time, and the machining efficiency is improved; the batch disassembly and assembly of parts replaces single clamping, so that the labor intensity of workers is reduced, the fatigue operation of the workers can be avoided, the working efficiency of the workers is improved, and the labor cost and the scrapping of parts caused by human factors can be reduced; the clamp has the advantages of simple structure, high clamping precision, clamping stability and clamping positioning accuracy, so that part jumping caused by assembly clearance during machining is reduced, and the quality of parts is further improved.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural view of an embodiment of a multi-station milling machine fixture according to the present invention;

fig. 2 is a partially enlarged view of the area a in fig. 1.

Reference numerals are as follows:

1. a base; 2. a mounting seat; 3. a tensioning sleeve; 3a, a pressing part; 3b, a second mating surface; 4. a mandrel; 4a, a shaft portion; 4b, a tensioning block; 4c, a first mating surface; 5. a piston rod.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that terms indicating orientation or positional relationship are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The azimuthal term "inner" refers to the side facing the direction of the mandrel axis, and "outer" refers to the side opposite the "inner"; the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, the multi-station milling machine fixture of the embodiment includes a base 1 disposed on a milling machine, a driving source (not shown in the drawings), a plurality of driving cylinders (not shown in the drawings) connected to the driving source, and a clamping device connected to the plurality of driving cylinders in a one-to-one correspondence manner, wherein the driving source and the driving cylinders are disposed below the base 1, and valves (not shown in the drawings) are disposed on pipelines connecting the driving source and each driving cylinder. The driving source may be a hydraulic, pneumatic or other driving source, and the driving cylinder may be a hydraulic cylinder, or an air cylinder. Through setting up the valve, a plurality of clamping devices can open and close simultaneously, also can open and close alone. The valve, the driving source and the driving cylinder are all of the structures in the prior art, and are not limited in detail here. The number of the clamping devices is set according to actual requirements.

The clamping device comprises a mounting seat 2 fixedly arranged on a base 1 and provided with a through hole, a tensioning sleeve 3 fixedly connected to the lower portion of the base in the through hole, and a mandrel 4 arranged on the inner side of the tensioning sleeve 3 and capable of sliding up and down relative to the tensioning sleeve 3, wherein the mandrel 4 comprises a shaft portion 4a and a tensioning block 4b, the bottom of the shaft portion 4a is fixedly connected with a piston rod 5 of a corresponding driving cylinder, the tensioning block 4b is connected to the top of the shaft portion 4a, the tensioning block 4b is in a circular truncated cone shape, the upper end face of the tensioning block is larger than the lower end face of the tensioning block, and the side face of the circular truncated cone shape is a first matching face 4c. The upper part of the tensioning sleeve 3 is provided with at least two pressing parts 3a which extend out of the through hole and are arranged at intervals, the specific number of the pressing parts 3a can be set according to actual requirements, and the inner side of each pressing part 3a is provided with a second matching surface 3b which can be matched with the first matching surface 4c and is in sliding contact with the first matching surface. The tension sleeve 3 and the pressing portion 3a are integrally formed. The outer diameter of the shaft part 4a is matched with the inner diameter of the lower part of the tensioning sleeve 3. Each clamping device has a working state and a release state, when in the working state, the mandrel 4 moves downwards relative to the release state, and the at least two pressing parts 3a are more opened relative to each other than in the release state.

In a preferred embodiment, the second engagement surface 3b is located on the inner wall of the tensioning sleeve 3, the second engagement surface 3b is an inclined surface which is inclined from top to bottom and gradually toward the center line, and the second engagement surfaces 3b of all the pressing portions 3a are located on the same conical surface. Or all the pressing parts 3a are arranged in a circular array with the axis of the mandrel 4 as the center.

The working principle of the multi-station milling machine fixture is that the mandrel 4 moves along with the piston rod 5 of the driving cylinder, when the multi-station milling machine fixture is in a release state, the first matching surface 4c does not apply an outward acting force to the second matching surface 3b, the pressing portion 3a and the pressing portion 3a are not opened relatively, the inner hole of a part is sleeved on the outer side of the pressing portion 3a, the inner hole of the part is in clearance fit with the pressing portion 3a, after the driving cylinder drives the mandrel 4 to move downwards, when the multi-station milling machine fixture is in a working state, the first matching surface 4c applies an outward acting force to the second matching surface 3b, the pressing portion 3a and the pressing portion 3a are opened relatively, the pressing portion 3a is in interference fit with the inner hole of the part, and the rotating friction force of the pressing portion 3a and the inner hole of the part is increased, so that the part is clamped.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims

1. The multi-station milling machine fixture is characterized by comprising a base (1) arranged on a milling machine, a driving source, a plurality of driving cylinders connected with the driving source and clamping devices connected with the driving cylinders in a one-to-one correspondence manner, wherein the driving source and the driving cylinders are arranged below the base;

the clamping device comprises a mounting seat (2) which is fixedly arranged on the base (1) and is provided with a through hole, a tensioning sleeve (3) of which the lower part is fixedly connected in the through hole, and a mandrel (4) which is arranged on the inner side of the tensioning sleeve (3) and can slide up and down relative to the tensioning sleeve (3), wherein the mandrel (4) comprises a shaft part (4 a) of which the bottom is fixedly connected with a piston rod (5) of a corresponding driving cylinder and a tensioning block (4 b) connected to the top of the shaft part, the tensioning block (4 b) is in a circular truncated cone shape, the upper end surface of the tensioning block is larger than the lower end surface of the tensioning block, and the side surface of the circular truncated cone shape is a first matching surface (4 c);

the upper part of the tensioning sleeve (3) is provided with at least two pressing parts (3 a) which extend out of the through hole and are arranged at intervals, and the inner sides of the pressing parts (3 a) are provided with second matching surfaces (3 b) which can be matched with the first matching surfaces (4 c) and are in sliding contact;

each clamping device has a working state and a release state, when the clamping device is in the working state, the mandrel (4) moves downwards relative to the release state, and the at least two pressing parts (3 a) are more opened relative to each other than in the release state;

and valves are respectively arranged on pipelines connecting the driving source and each driving cylinder.

2. A multi-station milling machine jig according to claim 1, wherein the second mating surface (3 b) is located on the inner wall of the tensioning sleeve (3), and the second mating surface (3 b) is a slope which is inclined from top to bottom and gradually towards the center line.

3. A multiple-station milling machine jig according to claim 1, characterized in that the second mating faces (3 b) of all the pressing portions (3 a) are on the same conical face.

4. A multiple station milling machine jig according to claim 1, wherein all the pressing portions (3 a) are arranged in a circular array centered on the axis of the mandrel (4).

5. A multi-station milling machine jig according to claim 1, wherein the tensioning sleeve (3) is integrally formed.

6. A multiple station milling machine jig according to claim 1, wherein the shaft portion (4 a) has an outer diameter matching an inner diameter of a lower portion of the tensioning sleeve (3).