CN215879955U

CN215879955U - Bearing ring rear chip removal internal expansion type lathe fixture

Info

Publication number: CN215879955U
Application number: CN202121708309.8U
Authority: CN
Inventors: 曾祥光
Original assignee: Hangzhou Junma Bearing Co ltd
Current assignee: Hangzhou Junma Bearing Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-02-22
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a rear chip removal and internal expansion type lathe fixture for a bearing ring, which comprises a fixture shell and a collet chuck, wherein the fixture shell is of a cylindrical structure, chip leakage holes are formed in the cylinder wall of the fixture shell, an inner conical surface is arranged at the front end of the fixture shell, a pull rod through hole is formed in the rear end surface of the fixture shell, the fixture shell is fixedly connected with a machine tool flange, the collet chuck is embedded in an inner cavity of the fixture shell and is fixedly connected with a machine tool pull rod, the front end part of the collet chuck is of a split structure and is provided with an outer conical surface structure, and clamping jaws are arranged on the inner wall of the front end part of the collet chuck. The influence of the scrap iron on the surface quality of the workpiece is eliminated.

Description

Bearing ring rear chip removal internal expansion type lathe fixture

Technical Field

The utility model relates to the technical field of bearing manufacturing, in particular to a rear chip removal internal expansion type lathe tool clamp for a bearing ring, which is simple in structure, convenient to clamp and not easy to scratch on the surface of a workpiece.

Background

The inner expansion type outer diameter spring chuck is widely used in the bearing manufacturing industry at present, generally, the clamping and the loosening of the inner expansion type outer diameter spring chuck are completed by the movement of a rear pull rod, along with the popularization of a turning automatic line, the clamping requirement on a workpiece is higher and higher, under the ordinary condition, the clamping requirement on the chuck is convenient, the positioning is accurate and reliable, the chip removal is easy, the spring chuck widely used at present is an integral type turning chuck with chip removal at the front end, the chuck is convenient to use, but has the chip breaking requirement on the machining process, the chip removal is difficult to clean, the surface of the workpiece is easy to scratch, or the machining quality is poor due to the fact that the clamping positioning is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at the defects of the technology and provides the rear chip removal internal expansion type lathe tool clamp for the bearing ring, which has the advantages of simple structure, convenience in clamping and difficulty in scratching the surface of a workpiece.

In order to solve the technical problems, the utility model mainly adopts the following technical scheme:

the utility model relates to a rear chip removal internal expansion type lathe fixture for a bearing ring, which is fixedly arranged on a flange of a machine tool and used for clamping the bearing ring during the turning process, the lathe fixture comprises a fixture shell and a spring chuck, the fixture shell is of a cylindrical structure with an opening at the front end, an internal conical surface structure is arranged at the front end of the fixture shell, a plurality of chip leakage holes are arranged on the cylinder wall of the fixture shell, a pull rod through hole is arranged in the center of the rear end surface of the fixture shell, a plurality of mounting holes are arranged on the periphery of the pull rod through hole, the fixture shell is fixedly connected with the flange of the machine tool through the mounting holes, the spring chuck is embedded in the inner cavity of the fixture shell, the spring chuck comprises a front end part and a rear end part, the outer surface of the front end part of the spring chuck is provided with an outer conical surface structure matched with the inner conical surface structure of the fixture shell, clamping jaws are arranged on the inner wall of the front end part of the spring chuck for clamping the bearing ring, and a pull rod screw hole is arranged in the center of the rear end part of the spring chuck, the machine tool pull rod penetrates through the pull rod through hole and is fixedly connected into the pull rod screw hole in a threaded mode, the machine tool pull rod drives the spring chuck to axially slide along the inner cavity of the clamp shell, the machine tool pull rod is used for controlling the spring chuck to move in the clamp shell, clamping jaws arranged at the front end of the spring chuck can radially move and expand and contract through the matching of the inner conical surface structure of the clamp shell and the outer conical surface structure of the spring chuck, a bearing ring to be machined is clamped or loosened, and the machine tool pull rod clamping fixture is simple in structure and convenient and reliable in clamping.

As preferred, collet chuck's preceding tip is split structure, clamping jaw and above-mentioned collet chuck's split structure one-to-one and swing joint are structural in above-mentioned split, collet chuck's split structure, and the breathing deformation of collet chuck preceding tip of being convenient for improves collet chuck's clamping capacity, and the detachable construction of clamping jaw is convenient for again change, maintenance and the preparation of clamping jaw.

As preferred, lathe work anchor clamps still include positioning ring seat and holding ring, be equipped with a plurality of location screws on the rear end face of anchor clamps casing, be equipped with the locating post hole with above-mentioned location screw one-to-one on the rear end bottom surface of collet chuck, the downthehole reference column that is equipped with of reference column, the afterbody of reference column is equipped with the internal screw hole and is fixed in on the positioning ring seat through the fixed screw, the terminal surface supports and leans on and fix a position before the holding ring bearing ring utilizes to set up the holding ring in the anchor clamps casing and treats the bearing ring axial positioning who processes, makes bearing ring can not squint or slope in the course of working, improves bearing ring's turning quality.

Preferably, the locating ring center is equipped with tubaeform chip removal through-hole, and the major diameter drill way of above-mentioned chip removal through-hole is towards the front end of locating ring, and the front end terminal surface of locating ring supports and leans on and fixes a position the bearing ring, the chip removal through-hole of tubaeform can discharge the scrap iron bits that produce to the barrel inner chamber of anchor clamps casing fast in the bearing ring turning process to discharge through the hourglass bits hole on the section of thick bamboo wall, the scrap iron bits is discharged to the work piece rear end, can not cause the scotch to bearing ring machined surface.

Preferably, the rear end surface of the positioning ring is provided with a positioning stage, the diameter of the positioning stage is matched with the inner diameter of the positioning ring seat, the positioning ring is embedded on the positioning ring seat through the positioning stage, the positioning ring can be accurately and quickly embedded and positioned in the positioning ring seat by utilizing the positioning stage, and the assembly is convenient.

The utility model has the beneficial effects that: anchor clamps pass through lathe pull rod pulling collet and remove in the anchor clamps casing, utilize the split type structure of tip before collet chuck and the mutually supporting of collet chuck outer conical surface and the inner conical surface of anchor clamps casing, make collet chuck front end breathing and press from both sides tightly or loosen the bearing ring of treating processing, moreover, the steam generator is simple in structure, the clamping is convenient, compare integral chuck structure, the manufacturing cost of anchor clamps has been reduced, the scrap iron bits that produce in the course of working simultaneously can directly be discharged from the work piece rear end under high-pressure cutting fluid or atmospheric pressure scour, easily rinse, and the influence of scrap iron bits to work piece surface quality has been eliminated, ensure the processingquality of product.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the clamp housing in fig. 1.

Fig. 3 is a schematic view of the collet chuck of fig. 1.

Figure 4 is a schematic view of the jaw configuration of figure 1.

Fig. 5 is a schematic view of the retainer ring seat of fig. 1.

Fig. 6 is a schematic view of the retaining ring of fig. 1.

In the figure: the clamp comprises a bearing ring 1, a bearing ring 2, a clamp shell 21, a chip leakage hole 22, a pull rod through hole 23, a mounting hole 24, a positioning screw hole 3, a spring chuck 31, a front end part 32, a rear end part 33, a pull rod screw hole 34, a positioning column hole 4, a clamping jaw 5, a machine tool pull rod 6, a positioning ring seat 7, a positioning ring 7, a chip removal through hole 71, a positioning stage 72 and a positioning column 8.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example (b): the bearing ring rear chip removal internal expansion type lathe clamp of the embodiment is fixedly arranged on a flange of a machine tool and is used for clamping a bearing ring 1 during lathe machining, as shown in figure 1, the lathe clamp comprises a clamp shell 2, a spring chuck 3, a positioning ring seat 6 and a positioning ring 7, as shown in figure 2, the clamp shell is of a cylindrical structure with an opening at the front end, an inner conical surface structure is arranged at the opening at the front end of the clamp shell, the half angle alpha of the conical surface of the clamp shell is 20-22 degrees, three chip leakage holes 21 which are uniformly distributed and annularly are designed on the cylindrical wall of the clamp shell, a pull rod through hole 22 matched with a pull rod of the machine tool is designed in the center of the rear end surface of the clamp shell, four mounting holes 23 and three positioning screw holes 24 are uniformly distributed on the periphery of the pull rod through hole, the clamp shell is connected with the flange of the machine tool through the mounting holes, the spring chuck is embedded in the inner cavity of the clamp shell, the spring chuck is made of 65Mn spring steel, as shown in figure 3, the collet chuck comprises a front end part 31 and a rear end part 32, the rear end part has a designed hardness of HRC 55-60 and has better wear resistance, the front end part has a designed hardness of HRC 40-45 and has better elasticity and expansion and contraction performance so as to be convenient for clamping a workpiece, a pull rod screw hole 33 is designed in the center of the rear end part, four positioning column holes 34 are arranged at the periphery of the screw hole, a machine tool pull rod 5 passes through the pull rod through hole and is fixedly connected with the pull rod screw hole of the collet chuck, the front end part of the collet chuck has a six-piece split structure, an outer conical surface structure matched with the inner conical surface structure of the clamp shell is designed on the outer surface of the split structure, the half angle beta of the conical surface of the outer conical surface of the collet chuck is slightly larger than the half angle alpha of the conical surface of the clamp shell so as to ensure that the outer conical surface of the collet chuck contacts with the front part of the split structure after tensioning, movable clamping jaws 4 corresponding to the split structure one by one are designed on the inner wall surface of the split structure of the collet chuck split structure, as shown in fig. 4, six clamping jaws enclose the bearing ring and clamp the bearing ring, a machine tool pull rod passes through a pull rod through hole to drive the spring chuck to axially slide along the inner cavity of the clamp shell and correspondingly drive the split structure at the front end part of the spring chuck to expand and contract, so that the clamping jaws press downwards to clamp or lift upwards to loosen the bearing ring; as shown in fig. 5, the positioning ring seat is of an annular structure, four counter bores are uniformly distributed on the positioning ring seat, fastening bolts are arranged in the counter bores, the counter bores correspond to positioning column holes on the spring chuck one by one, positioning columns 8 are embedded in the positioning column holes at the rear end part of the spring chuck, the tail parts of the positioning columns are fixedly connected with positioning screw holes of the clamp shell in a threaded manner, inner screw holes are arranged at the head parts of the positioning columns and are fixed with the positioning ring seat through the fastening bolts, as shown in fig. 6, a horn-shaped chip removal through hole 71 is designed at the center of the positioning ring, the large-diameter hole opening of the chip removal through hole faces to the front end of the positioning ring and is aligned with a bearing ring to be processed, scrap iron falls into a cylindrical inner cavity of the clamp shell at the rear end of a workpiece through the washing of high-pressure cutting fluid or high-pressure gas and is discharged through three chip leakage holes without affecting the surface chip removal quality of the bearing ring, and a positioning stage 72 concentric with the chip removal through hole is arranged on the rear end surface of the positioning ring, the diameter of the positioning stage is identical to the inner diameter of the positioning ring seat and is embedded on the positioning ring seat, the positioning ring is connected with the positioning ring seat through a fixing screw, the end face of the front end of the positioning ring is abutted against the end face of the bearing ring, the axial positioning effect of the bearing ring is achieved, and the bearing ring is prevented from deflecting.

In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "longitudinal", "lateral", "inner", "outer", etc. indicate the direction or positional relationship based on the directions or positional relationships shown in the drawings, which are only for convenience of description and understanding of the technical solutions of the present invention, and the above description is not intended to limit the present invention, and the present invention is not limited to the examples described above, and changes, modifications, additions or substitutions made by those skilled in the art within the spirit and scope of the present invention should be considered as the protection scope of the present invention.

Claims

1. The utility model provides an expanding lathe work anchor clamps in chip removal behind bearing ring sets firmly on the lathe flange for the centre gripping of bearing ring (1) lathe work in man-hour, its characterized in that: the turning fixture comprises a fixture shell (2) and a collet chuck (3), wherein the fixture shell is of a tubular structure with an opening at the front end, the front end of the fixture shell is provided with an inner conical surface structure, the cylinder wall of the fixture shell is provided with a plurality of chip leakage holes (21), the center of the rear end face of the fixture shell is provided with a pull rod through hole (22), the periphery of the pull rod through hole is provided with a plurality of mounting holes (23), the fixture shell is fixedly connected with a machine tool flange through the mounting holes, the collet chuck is embedded in an inner cavity of the fixture shell and comprises a front end part (31) and a rear end part (32), the outer surface of the front end part of the collet chuck is provided with an outer conical surface structure matched with the inner conical surface structure of the fixture shell, the inner wall of the front end part of the collet chuck is provided with a clamping jaw (4), the clamping jaw clamps the bearing ring, and the center of the rear end part of the collet chuck is provided with a pull rod screw hole (33), and a machine tool pull rod (5) penetrates through the pull rod through hole and is fixedly connected in the pull rod screw hole in a threaded manner, and the machine tool pull rod drives the spring chuck to axially slide along the inner cavity of the clamp shell.

2. The rear chip removal internal expansion type lathe clamp of the bearing ring according to claim 1, which is characterized in that: the front end of collet chuck (3) is the split structure, clamping jaw (4) and above-mentioned collet chuck's split structure one-to-one and swing joint are structural in above-mentioned split.

3. The rear chip removal internal expansion type lathe clamp of the bearing ring according to claim 1 or 2, which is characterized in that: the lathe fixture further comprises a positioning ring seat (6) and a positioning ring (7), a plurality of positioning screw holes (24) are formed in the rear end face of the fixture shell (2), positioning column holes (34) corresponding to the positioning screw holes one to one are formed in the bottom face of the rear end portion of the spring chuck (3), positioning columns (8) are embedded in the positioning column holes, inner screw holes are formed in the tail portions of the positioning columns and fixed on the positioning ring seat through fixing screws, and the front end face of the positioning ring abuts against and is positioned on the bearing ring (1).

4. The rear chip removal internal expansion type lathe clamp of the bearing ring according to claim 3, characterized in that: the center of the positioning ring (7) is provided with a horn-shaped chip removal through hole (71), a large-diameter hole of the chip removal through hole faces to the front end of the positioning ring, and the end face of the front end of the positioning ring abuts against and is positioned on the bearing ring (1).

5. The rear chip removal internal expansion type lathe clamp of the bearing ring according to claim 4, which is characterized in that: the rear end surface of the positioning ring (7) is provided with a positioning stage (72), the diameter of the positioning stage is matched with the inner diameter of the positioning ring seat (6), and the positioning ring is embedded on the positioning ring seat through the positioning stage.