CN212240040U

CN212240040U - Special milling fixture for weak-rigidity slice part

Info

Publication number: CN212240040U
Application number: CN201922151565.0U
Authority: CN
Inventors: 邵文普; 何静; 许代新; 蒋明; 李云跃; 刘清鹏
Original assignee: Institute of Fluid Physics of CAEP
Current assignee: Institute of Fluid Physics of CAEP
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-12-29
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses a special fixture for milling weak-rigidity slice parts, which mainly comprises a fixture body, a locking device, a fastening bush, a bracket, a workpiece positioning pin, a workpiece, a fixing cover, a bracket positioning pin and an elastic support body, wherein the elastic support is arranged in the fixture body, and the bracket wraps the fastening bush and is fixed in the fixture body through the locking device; the workpiece is positioned and placed on the surface of the bracket through the workpiece positioning pin and is pressed tightly through the fixing cover. The device is suitable for processing holes, grooves and steps on the surface of a weak-rigidity sheet workpiece, and can reliably position the processed weak-rigidity sheet workpiece through a simple structure without damaging the mechanical structure of the workpiece.

Description

Special milling fixture for weak-rigidity slice part

Technical Field

The utility model belongs to the technical field of machining, concretely relates to weak rigidity thin slice parts machining frock clamp.

Background

In machining, some thin sheet parts are often machined with features such as holes, stepped grooves, through grooves and the like, but the parts are low in strength and poor in rigidity, and have high requirements on shape and position tolerance, so that the problem that machining precision of the thin sheet parts is reduced due to deformation of workpieces is often encountered.

At present, for the processing of surface characteristics of thin sheet parts, a tool is generally adopted to be matched with a plurality of pressing plates for clamping processing, a non-metal material is easy to break or crack during disassembly, and a metal material is easy to deform and difficult to meet the precision requirement; particularly, for some thin sheet parts, the wall is thinner after milling, the thickness of the joint is smaller, the clamping and the dismounting of the parts have higher difficulty, the conventional clamping method cannot meet the requirements of the processing technology, and a clamp needs to be innovatively designed so as to effectively finish the processing of the product.

Disclosure of Invention

The utility model aims to solve the technical problem that to thin slice class part surface characteristic's processing, generally adopt a plurality of clamp plates of frock cooperation to carry out clamping processing, non-metallic material breaks easily or crackle during the dismantlement, and metallic material is out of shape easily and is difficult to satisfy the required precision, the utility model provides a special fixture is milled to weak rigidity thin slice part.

The utility model provides a weak rigidity thin slice part mills special fixture, includes the anchor clamps body, fastening bush and bracket, sets up fastening bush in the anchor clamps body, sets up the bracket in the fastening bush, sets up the work piece locating pin on the bracket, and work piece locating pin upper portion sets up fixed lid, fixed lid and bracket swing joint.

The fastening bushing material is H62 and 2A 12.

Furthermore, the clamp body is provided with a locking hole, the locking hole is provided with a locking device, the clamp body is provided with a bracket matching hole, the bracket is arranged in the bracket matching hole, the bracket is provided with a pin hole and a workpiece positioning hole, and the hole and the pin are used in a combined manner, so that the fixing strength of a workpiece can be increased, the workpiece is prevented from rotating or moving to influence the processing quality, and the position of the pin can be adjusted according to the shape of the workpiece.

Furthermore, the base is arranged below the clamp body and can be fixed on a milling machine, so that the firmness is improved, and the clamp is convenient for an operator to use.

Furthermore, the locking device is a locking bolt and is matched with the workpiece positioning device to firmly fix the workpiece.

Furthermore, the elastic supporting body is a spring, the elastic body guide rod on the bracket extends into the spring, and the elastic supporting body ensures the bracket to be fully contacted with a workpiece; the clamp body is provided with air holes, so that the circulation of gas in the processing process is ensured.

Further, the fixed cover is a spiral gland, and the clamp body is provided with threads matched with the spiral gland.

Furthermore, the lower end of the bracket is provided with two bracket positioning pins, the two bracket positioning pins are respectively and vertically and symmetrically fixed in the positioning pin matching holes, and the pin holes in the bracket are in sliding fit with the bracket positioning pins.

Furthermore, the workpiece positioning holes on the upper surface of the bracket are distributed according to the shape of the workpiece, and the shape of the workpiece positioning holes is circular, triangular or polygonal.

The utility model discloses a special fixture for milling weak-rigidity slice parts, after a workpiece is placed on the upper surface of a bracket, the position of the bracket is positioned by a locking device when the workpiece is processed, and the workpiece and the bracket are fastened in a fixture body through a fixing cover; after the machining is finished, the fixing cover is taken down, the locking bolt is loosened, the bracket and the workpiece are slowly supported out of the inner cavity of the clamp body by the elastic supporting body, and the workpiece cannot be broken or deformed.

The utility model discloses a weak rigidity thin slice part mills special fixture, reasonable in design, simple structure, convenient operation, the work piece atress is even, easily dismantles, can prevent that the part from warping or splitting, has the function of dress card, location, dismantlement processing part, and the processing problem of solution thin slice complex construction part that can be fine has effectively improved work piece processingquality and production efficiency, low in production cost, convenient to popularize and use.

Drawings

FIG. 1 is a schematic structural view of a special milling fixture for weak-rigidity thin-sheet parts according to the present invention;

FIG. 2 is a schematic view of the assembly of a bracket and a clamp body of the special milling clamp for weak-rigidity thin-sheet parts of the present invention;

FIG. 3 is a schematic view of clamping a square workpiece by a bracket of the special milling fixture for weak-rigidity thin-sheet parts of the present invention;

FIG. 4 is a schematic view of clamping a round workpiece fixed by a bracket of the special milling fixture for weak-rigidity thin-sheet parts of the present invention;

FIG. 5 is a schematic view of a clamp of the present invention for milling a thin part with weak rigidity;

in the figure: 1. the fixture comprises a fixture body 1a, an air hole 1b, an elastic support body fixing structure 1c, a locking hole 1d, a bushing matching hole 1e, a positioning pin matching hole 1f, a base 2, a locking device 3, a fastening bushing 4, a bracket 4a, a pin hole 4b, a workpiece positioning hole 4c, an elastic support body guide rod 5, a workpiece positioning pin 6, a workpiece 7, a fixing cover 8, a bracket positioning pin 9, an elastic support body 10 and a machine tool chuck.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model provides a weak rigidity thin slice part mills special fixture, includes the anchor clamps body 1, fastening bush 3 and bracket 4, sets up fastening bush 3 in the anchor clamps body 1, sets up bracket 4 in the fastening bush 3, sets up work piece locating pin 5 on the

bracket

4, and 5 upper portions of work piece locating pin set up fixed lid 7, fixed lid 7 and bracket 4 swing joint.

Be provided with locking hole 1c on the anchor clamps body 1, locking hole 1c is equipped with locking device 2, sets up bracket mating holes 1d on the anchor clamps body 1, and inside bracket 4 set up bracket mating holes 1d, be provided with pinhole 4a and work piece locating hole 4b on bracket 4. The hole and the pin are combined for use, so that the fixing strength of a workpiece can be increased, the workpiece is prevented from rotating or moving to influence the processing quality, and the position of the pin can be adjusted according to the shape of the workpiece.

A base 1f is arranged below the clamp body 1. The base can be fixed on the milling machine, so that not only is the firm strength increased, but also the use by an operator is facilitated.

The locking device 2 is a locking bolt and is matched with a workpiece positioning device to firmly fix the workpiece.

The elastic supporting body 9 is a spring, the elastic body guide rod 4c on the bracket extends into the spring 9, and the clamp body 1 is provided with an air hole 1a. The elastic support body ensures the bracket to be in full contact with the workpiece; the clamp body is provided with air holes, so that the circulation of gas in the processing process is ensured.

The fixed cover 7 is a spiral gland, and the clamp body 1 is provided with threads matched with the spiral gland.

Two bracket positioning pins 8 are arranged at the lower end of the bracket 4, the two bracket positioning pins 8 are respectively and symmetrically and vertically fixed in the positioning pin matching holes 1e, and pin holes 4a on the bracket 4 are in sliding fit with the bracket positioning pins 8.

The workpiece positioning holes 4b on the upper surface of the bracket 4 are distributed according to the shape of the workpiece 6, and the shape of the workpiece positioning holes 4b is circular, triangular or polygonal.

Example 1:

as shown in FIGS. 1-5, the utility model discloses a weak rigidity thin slice part mills special fixture mainly includes the anchor clamps body 1, locking device 2, fastening bush 3, bracket 4, work piece locating pin 5, work piece 6, fixed lid 7, bracket locating pin 8, elastic support body 9 and constitutes. The workpiece 6 is preferably polygonal; the fastening bush 3 is preferably made of H62; the locking device 2 is preferably a locking bolt; the fixed cover is preferably a spiral gland; the elastic support is preferably a spring. The clamp body 1 is provided with an air hole 1a, a spring fixing hole 1b, a locking screw hole 1c, a bracket matching hole 1d and a positioning pin matching hole 1e, the air hole 1a and a base 1f are located at the lower end of the clamp body 1, and the clamp body 1 is fixed on a milling machine by arranging an air hole 1a end.

When the clamp is implemented, the clamp body 1 is fixed in a milling machine chuck, the spring 9 is placed in the spring fixing hole 1b, the bracket 4 is placed in the bracket matching hole 1d in a sliding mode after being wrapped by the fastening bush 3, and the pin hole 4a and the positioning pin matching hole 1e are coaxial through the bracket positioning pin 8; (ii) a A certain number of workpiece positioning holes 4b are arranged on the upper surface of the bracket 4 according to the outer contour characteristics of the machined workpiece 6, and the clamping position of the workpiece 6 is fixed through workpiece positioning pins 5 in the workpiece positioning holes 4 b; the bracket 4 is pressed downwards, the spring 9 contracts after being pressed, and the bracket 4 slides downwards along the positioning pin 8 through the positioning pin hole 1e, so that the bracket 4 is tightly attached to the inner cavity platform surface. The two bracket positioning pins 8 can prevent the bracket 4 and the workpiece 6 from rotating and moving relative to the fixture body 1 when the screw gland 7 is screwed into the fixture body 1, so that the positioning accuracy is not affected. Tightening the locking bolt 2 screwed into the locking screw hole 1c to tightly press the fastening bush 3, further locking and fixing the bracket 4, and fixing the bracket 4 in the bracket matching hole 1 d; and placing the workpiece 6 in the position determined by the workpiece positioning pin 5, screwing the screw gland 7, and tightly clamping the workpiece 6 on the surface of the bracket 4 to finish the workpiece installation.

After the machining is finished, the spiral gland 7 is taken down firstly, then the locking bolt 2 is loosened by the spring 9 to restore the free state, and the bracket 4 and the workpiece 6 are slowly supported out of the inner cavity of the clamp body 1 under the action of elasticity, so that the effect of easily taking down the workpiece 6 parts without fracture or deformation is achieved.

Example 2:

the difference from example 1 is:

the workpiece 6 is preferably circular, the fastening bush 3 is preferably 2a12 in material, and the elastic support is preferably a hydraulic device.

Claims

1. The utility model provides a weak rigidity thin slice part mills special fixture, includes the anchor clamps body (1), fastening bush (3) and bracket (4), its characterized in that sets up fastening bush (3) in the anchor clamps body (1), sets up bracket (4) in fastening bush (3), sets up work piece locating pin (5) on bracket (4), and work piece locating pin (5) upper portion sets up fixed lid (7), fixed lid (7) and bracket (4) swing joint.

2. The special fixture for milling the weak-rigidity thin-sheet part according to claim 1, wherein a locking hole (1c) is formed in the fixture body (1), a locking device (2) is arranged in the locking hole (1c), a bracket matching hole (1d) is formed in the fixture body (1), the bracket (4) is arranged inside the bracket matching hole (1d), and a pin hole (4a) and a workpiece positioning hole (4b) are formed in the bracket (4).

3. The special milling fixture for the thin and weak rigid part as claimed in claim 1, wherein a base (1f) is arranged under the fixture body (1).

4. The special fixture for milling the weak-rigidity thin-sheet part as claimed in claim 2, wherein the locking device (2) is a locking bolt.

5. The special milling fixture for the weak-rigidity thin-sheet part as claimed in claim 1, wherein the elastic supporting body (9) is a spring, the elastic body guide rod (4c) on the bracket extends into the elastic supporting body (9), and the fixture body (1) is provided with an air hole (1 a).

6. The special milling fixture for the thin and weak rigid part as claimed in claim 1, wherein the fixed cover (7) is a screw gland, and the fixture body (1) is provided with a thread matched with the screw gland.

7. The special milling fixture for the weak-rigidity thin-sheet part according to claim 1, wherein the lower end of the bracket (4) is provided with two bracket positioning pins (8), the two bracket positioning pins (8) are respectively symmetrically and vertically fixed in the positioning pin matching holes (1e), and pin holes (4a) in the bracket (4) are in sliding fit with the bracket positioning pins (8).

8. The special milling fixture for the thin and weak rigid part as claimed in claim 1, wherein the workpiece positioning holes (4b) on the upper surface of the bracket (4) are distributed according to the shape of the workpiece (6), and the workpiece positioning holes (4b) are circular, triangular or polygonal.