CN214443180U

CN214443180U - Machine seat finish turning core expansion die

Info

Publication number: CN214443180U
Application number: CN202120587545.2U
Authority: CN
Inventors: 伍新荣; 商伟; 王鹏; 游米兰
Original assignee: Hunan Lince Rolling Stock Equipment Co Ltd
Current assignee: Hunan Lince Rolling Stock Equipment Co Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-10-22
Anticipated expiration: 2031-03-23

Abstract

The utility model discloses a core mould that rises is turned to frame finish, including the center pin, the surface of center pin is provided with a plurality of slider, the both sides of slider surface all are provided with annular spring, a plurality of screw hole has been seted up to the surface of center pin, and the internal surface threaded connection of screw hole has holding screw, in the frame finish turning process, can swiftly fix finish turning mould and work piece on the lathe, find the frame processing benchmark very fast, whole process is high-efficient swift, when improving work efficiency, has guaranteed frame finish turning product quality requirement to this core mould that rises is turned to frame finish turning can be used for the frame finish turning processing of the different size specifications of clamping through the slider of changing different flange external diameters.

Description

Machine seat finish turning core expansion die

Technical Field

The utility model relates to a track traffic technical field, concretely relates to seat finish turning core mould that rises.

Background

In the accessory production process of the electric locomotive fan motor, the finish turning process of the motor base is a key process, and the machining size precision of the finish turning process greatly influences the performance of the motor and the fan. For the finish turning of a small-sized machine base, the traditional method is that the inner hole of the machine base is directly tightened by using three claws of a lathe chuck, the outer circle of the root part of a radiating fin of the machine base is repeatedly corrected to accurately process a datum, and clamping and turning are carried out twice, so that the back-and-forth clamping is time-consuming and labor-consuming, one end of the inner hole of the machine base is tightened by the three claws, the tightening force of a clamping jaw on the inner hole of the inner hole is uneven, stress concentration is easily generated to cause deformation of the machine base, adverse effects are brought to the working efficiency and the yield of machine base processing, and the working efficiency and the product quality of the finish turning of the small-sized machine base are troubled by the series of processing problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a core mould rises in smart car of frame, it is adjustable through smart car mould excircle diameter, reaches the purpose of tightening the frame hole to solve the loaded down with trivial details problem of frame smart car clamping timing, eliminate the jack catch simultaneously and tighten the frame hole and have the deformation hidden danger.

The purpose of the utility model can be realized by the following technical scheme:

a fine turning core expansion die for a machine base comprises a central shaft, wherein a plurality of sliding blocks are arranged on the outer surface of the central shaft, annular springs are arranged on two sides of the outer surface of each sliding block, a plurality of threaded holes are formed in the outer surface of the central shaft, set screws are connected to the inner surfaces of the threaded holes in a threaded mode, the outer surfaces of the set screws are in contact with one sides of the sliding blocks, a first flange is fixedly connected to one side of each sliding block, a second flange is fixedly connected to the other side of each sliding block, arc grooves are formed in the opposite sides of the first flange and the second flange, and the annular springs are located on the inner surfaces of the arc grooves;

the center pin includes the tapering rank pole, the equal fixedly connected with threaded rod in both ends of tapering rank pole, two the equal fixedly connected with transition bar of one end that the threaded rod was kept away from relatively, two the equal threaded connection of surface of threaded rod has the locking swivel nut.

As a further aspect of the present invention: the locking thread inserts are composed of a square component and a round component, and one sides, far away from the first flange and the second flange, of the first flange and the second flange are in surface contact with one sides, opposite to the two locking thread inserts, of the first flange and the second flange respectively.

As a further aspect of the present invention: the inner surface of the first flange is matched with one side of the outer surface of the central shaft, and the inner surface of the second flange is matched with the other side of the outer surface of the central shaft.

As a further aspect of the present invention: the outer diameters of the two first flanges and the second flange are the same.

As a further aspect of the present invention: the central axis of the first flange coincides with the central axis of the central shaft, and the central axis of the central shaft coincides with the central axis of the second flange.

The utility model has the advantages that: the four sliding blocks are connected and combined with the central shaft by conical surfaces, the sliding blocks can slide on the central shaft, the locking screw sleeves at the front end and the rear end of the central shaft have double functions of limiting, fixing, extruding and propelling at the two ends of the sliding blocks, the outer diameters of a first flange and a second flange at the two ends of the sliding blocks are gradually changed, so that the matching of the sliding blocks on the core expansion die and the inner hole of the machine base is switched between interference and clearance, the clamping and unloading of workpieces in the finish turning process of the machine base are realized, the coaxiality requirement of the core expansion die and the inner hole of the machine base is indirectly ensured due to the coaxial centers of the sliding blocks and the central shaft, when the finish turning core expansion die of the machine base is fixed on a lathe chuck, the coaxiality requirement of the finish turning die and the lathe chuck is further met, the requirement of the coaxiality consistency among the lathe chuck, the finish turning die and the machine base is realized, namely the consistency of the workpiece and the rotation center of the lathe chuck is ensured, and the theoretical requirement of rotary processing is met, in the frame finish turning process, can swiftly fix finish turning mould and work piece on the lathe, find the frame machining benchmark very fast, whole process is high-efficient swift, when improving work efficiency, has guaranteed the frame finish turning product quality requirement to this frame finish turning rises the slider of mandrel through changing different flange external diameters, can be used for the frame finish turning processing of the different size specifications of clamping.

Drawings

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

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

FIG. 3 is a schematic view of the interference fit between the core mold and the frame;

FIG. 4 is a schematic view of the clearance fit between the core mold and the frame;

fig. 5 is an enlarged view of a portion of the structure of fig. 3 according to the present invention;

fig. 6 is an enlarged view of a portion B of fig. 4 according to the present invention.

In the figure: 1. a central shaft; 11. a taper step rod; 12. a threaded rod; 13. a transition rod; 2. a slider; 3. an annular spring; 4. tightening the screw; 5. a first flange; 6. a second flange; 7. and locking the threaded sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-6, a fine turning core expansion die for a machine base comprises a central shaft 1, a plurality of sliding blocks 2 are arranged on the outer surface of the central shaft 1, the number of the sliding blocks 2 is four, the sliding blocks 2 are changed along with the position on a taper step rod 11, the middle of the inner side of each sliding block 2 is processed into a concave structure so as to reduce the friction between the sliding block 2 and the central shaft 1, the sliding blocks 2 can freely slide back and forth on the taper step rod 11 of the central shaft 1, the turning die can be used for fine turning of machine bases with various specifications by assembling the sliding blocks 2 with different flange outer diameters, annular springs 3 are arranged on two sides of the outer surface of each sliding block 2, the elastic force of each annular spring 3 meets the requirement of constraining the sliding block 2 on the central shaft 1 so as not to fall off, a plurality of threaded holes are formed in the outer surface of the central shaft 1, and set screws 4 are connected to the inner surfaces of the threaded holes in a threaded manner, the specification of a set screw 4 meets the requirement of the distance between two sliding blocks 2, the outer surface of the set screw 4 is in contact with one side of each sliding block 2, one side of each sliding block 2 is fixedly connected with a first flange 5, the other side of each sliding block 2 is fixedly connected with a second flange 6, arc grooves are formed in the opposite sides of the first flange 5 and the second flange 6, and the annular spring 3 is located on the inner surface of each arc groove;

the central shaft 1 comprises a taper step rod 11, threaded rods 12 are fixedly connected to two ends of the taper step rod 11, two ends of the threaded rods 12, which are close to each other, are fixedly connected with a transition rod 13, one end of each transition rod 13 is a lathe clamping end and plays a role in transmitting the working torque power of a lathe, the other end of each transition rod 13 is a thimble end, a machine base finish turning core expansion die can be fixed on the lathe in a manner of clamping one thimble, the fixing manner has the advantages of improving the mechanical efficiency and the safety operation coefficient, the outer surfaces of the two threaded rods 12 are both in threaded connection with locking screw sleeves 7, one end of inner holes of the locking screw sleeves 7 are threaded, the other end of the inner holes of the locking screw sleeves 7 are through holes, when the locking screw sleeves 7 are tightly attached to one sides of a first flange 5 and a second flange 6, the outer diameter of a sliding block 2 is increased to the maximum, and when the machine base finish turning core expansion die is in interference fit with the machine base inner holes, the purpose of tightening the machine base is achieved, vice versa, can make frame hole and frame finish turning mould excircle change clearance fit into from interference fit, frame finish turning core mould that rises is equipped with the required work piece of frame finish turning process and is tightened and the function of work piece unloading.

The utility model discloses in, locking swivel nut 7 is a square component and circular component constitution, the square spanner operation of being convenient for, one side that first flange 5 and second flange 6 kept away from relatively is parallel and for the face contact with two relative one sides of locking swivel nut 7 respectively.

The utility model discloses in, one side looks adaptation of the internal surface of

first flange

5 and 1 surface of center pin, the internal surface of second flange 6 and the opposite side looks adaptation of 1 surface of center pin.

The utility model discloses in, two first flange 5 is the same with the external diameter of second flange 6.

The utility model discloses in, the central axis of first flange 5 coincides with the central axis of center pin 1 mutually, the central axis of center pin 1 coincides with the central axis of second flange 6 mutually.

The utility model discloses in, this frame finish turning rises mandrel's application method does: firstly, wrapping a central shaft 1 by using a sliding block 2, sleeving an annular spring 3 on the sliding block 2 to enable the annular spring 3 to be positioned in arc grooves on a first flange 5 and a second flange 6, sleeving a locking threaded sleeve 7 on a threaded rod 12 of the central shaft 1, then rotating the sliding block 2 to enable a threaded hole in the central shaft 1 to be leaked out, then inserting a set screw 4 between the two sliding blocks 2, and performing rotating tightening to enable the set screw 4 to be inserted into the threaded hole, thereby completing assembly;

fixing the assembled core expansion die on a lathe chuck, correcting the common central axis of the core expansion die and the chuck to ensure that a machine base inner hole and the core expansion die are in a clearance fit state, wherein the diameter of a first flange 5 and a second flange 6 is smaller than that of the machine base inner hole, penetrating the machine base inner hole through the core expansion die, rotating a rear-end locking screw sleeve 7 to one end with large taper of a taper step rod 11, the rear end of a slide block 2 is under the screwing thrust action of a rear locking screw sleeve 7, the slide block 2 slides along one end with large taper of the taper step rod 11, when the front end of the slide block 2 is tightly attached to the front locking screw sleeve 7, the outer diameter of the slide block 2 reaches the maximum value, the slide block 2 in the core expansion die is in an interference fit state with the machine base inner hole, then locking the slide block 2 through the locking screw sleeve 7, tightening the machine base by the core expansion die, and then centering the common central axis of the core expansion die and the machine base, at the moment, finishing the rabbets and the end faces of the two ends of the base;

after finishing finish turning of the machine base, the rear-end locking threaded sleeve 7 is rotated backwards, meanwhile, the front-end locking threaded sleeve 7 is rotated forwards, the sliding block 2 slides towards one end with small taper of the rear taper step rod 11, so that the outer diameter of the sliding block 2 is gradually reduced, the sliding block 2 gradually releases the tension force on the inner hole of the machine base, at the moment, the inner hole of the machine base and the sliding block 2 are in a clearance fit state, and the machine base can be easily detached from the finish turning mold of the machine base.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. The machine base finish turning core expansion die is characterized by comprising a central shaft (1), wherein the outer surface of the central shaft (1) is provided with a plurality of sliding blocks (2), two sides of the outer surface of each sliding block (2) are respectively provided with an annular spring (3), the outer surface of the central shaft (1) is provided with a plurality of threaded holes, the inner surfaces of the threaded holes are in threaded connection with a set screw (4), the outer surface of the set screw (4) is in contact with one side of each sliding block (2), one side of each sliding block (2) is fixedly connected with a first flange (5), the other side of each sliding block (2) is fixedly connected with a second flange (6), one opposite side of each first flange (5) and one opposite side of each second flange (6) are respectively provided with an arc groove, and the annular springs (3) are positioned on the inner surfaces of the arc grooves;

center pin (1) is including tapering rank pole (11), the equal fixedly connected with threaded rod in both ends (12) of tapering rank pole (11), two the equal fixedly connected with transition bar (13) of one end that threaded rod (12) kept away from relatively, two the equal threaded connection of surface of threaded rod (12) has locking swivel nut (7).

2. The fine turning core expansion die for the machine seat as claimed in claim 1, wherein the locking screw sleeves (7) are composed of a square component and a circular component, and the opposite sides of the first flange (5) and the second flange (6) are respectively parallel to and in surface contact with the opposite sides of the two locking screw sleeves (7).

3. A machine foundation finishing expansion core mould according to claim 1, characterized in that the inner surface of the first flange (5) is adapted to one side of the outer surface of the central shaft (1) and the inner surface of the second flange (6) is adapted to the other side of the outer surface of the central shaft (1).

4. The fine turning expansion core die for the machine base as claimed in claim 1, wherein the two first flanges (5) and the second flange (6) have the same outer diameter.

5. The fine turning core die for the machine base is characterized in that the central axis of the first flange (5) is coincident with the central axis of the central shaft (1), and the central axis of the central shaft (1) is coincident with the central axis of the second flange (6).