Cylinder end forming die

Abstract

The utility model relates to a barrel end forming die which is technically characterized by comprising an inner centering die, a front supporting die, a sliding gland, a horizontal pull rod, a forming tailstock, a spring clamping sleeve and a positioning block. The sliding gland is composed of an annular guide part connected with the horizontal pull rod and an annular acting part arranged on the outer edge of the front portion of the annular guide part. The inner centering die is provided with an inner cavity matched with the annular guiding part, the front supporting die is annular, the rear end face of the front supporting die is provided with a plurality of distance columns connected with the inner centering die, the annular acting part of the sliding gland is provided with receding holes corresponding to the distance columns, and bulging conical surfaces are arranged at the roots of the front end and the rear end of the outer circumferential face of the inner centering die respectively. The front end and the rear end of the spring clamping sleeve are respectively provided with a bulging conical surface matched with the bulging conical surface of the inner centering die, and the front end of the spring clamping sleeve is further provided with an annular groove corresponding to the top face of the annular acting part. The die solves the problem that the machining difficulty of the end of a thin-walled cylinder part is large, the forming precision is remarkably improved, and the machining stability of a product is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cylindrical part machining mould, specifically relates to a cylindrical end forming die, and is suitable for the processing of the end complex profile of thin-walled cylindrical part. BACKGROUND

[0002] The commonly used mould on numerical control equipment is three-jaw self-centering chuck and four-jaw single-action chuck, when the end of cylindrical part is processed, it is fixed on the mould through manual / hydraulic mode, so that the part can rotate with the equipment main shaft, thereby completing the processing of the part. By using this clamping mode, the contact surface of the part and the mould is relatively small, and the part needs to have high strength and hardness. However, for the thin-walled cylindrical part, due to the low strength of the part itself, it is difficult to process by using the common mould, and the processing precision and stability are low. SUMMARY

[0003] The utility model discloses a kind of cylindrical end forming die with reasonable structure, reliable use, solve the problem of the processing difficulty of thin-walled cylindrical part end, significantly improve forming precision, greatly reduce part deformation, ensure product consistency, realize the production of part fast, efficient, effectively guarantee the stability of product processing.

[0004] The technical scheme of the utility model is:

[0005] A cylindrical end forming die, and its technical key points are: including inner centering mould, front support mould connected with the front end of inner centering mould and concentric with inner centering mould, sliding gland located between inner centering mould and front support mould, horizontal pull rod connected with the center of sliding gland, forming tailstock for cooperating with the front end surface of front support mould, spring collet sleeve sleeved on the outer side of inner centering mould, positioning block arranged at the rear end of inner centering mould, the sliding gland is composed of annular guide portion connected with horizontal pull rod and annular working portion arranged at the outer edge of front part of annular guide portion, the inner centering mould is provided with inner cavity matched with annular guide portion, the front support mould is annular, and the rear end surface of front support mould is provided with a plurality of distance columns connected with inner centering mould, the annular working portion of sliding gland is provided with avoiding hole corresponding to distance column, the front end and rear end of the outer circumferential surface of inner centering mould are respectively provided with bulging conical surface, the front end and rear end of spring collet sleeve are respectively provided with bulging conical surface matched with the bulging conical surface of inner centering mould, the front end of spring collet sleeve is additionally provided with annular groove corresponding to the top surface of annular working portion, and the outer circumferential surface of front support mould and forming tailstock is matched to form annular forming groove adapted to the end of to-be-formed cylindrical part.

[0006] The cylindrical end forming die, the front end of the spring collet sleeve is uniformly provided with a plurality of front breaks extending to the rear end, the rear end of the spring collet sleeve is uniformly provided with a plurality of rear breaks extending to the front end, and the front breaks and rear breaks are staggered.

[0007] The end forming die for cylinder parts, the rear end of the inner centering die is provided with an expanding surface, and the plurality of positioning blocks are uniformly fixed on the expanding surface to increase the limiting height for the cylinder parts.

[0008] The end forming die for cylinder parts, the rear end surface of the inner centering die is provided with a rear guide through hole corresponding to the horizontal pull rod.

[0009] The end forming die for cylinder parts, the front end surface of the front support die is provided with a positioning groove, and the rear end surface of the forming tail seat is provided with a positioning boss matched with the positioning groove.

[0010] The end forming die for cylinder parts, the inner distance column of the front support die is provided with a stepped through hole, and the tip of the bolt is connected and fixed with the inner centering die through the stepped through hole.

[0011] The end forming die for cylinder parts, the outer surface of the spring clamp sleeve is provided with a rubber coating to increase the friction and avoid scratches on the surface of the parts.

[0012] The end forming die for cylinder parts has the beneficial effects that:

[0013] 1. When in use, the cylinder to be formed is sleeved on the outside of the spring clamp sleeve, the horizontal pull rod is pulled to drive the sliding gland to produce horizontal displacement, the annular working part of the sliding gland pushes the spring clamp sleeve to move along the inner centering die, the bulging taper surface of the spring clamp sleeve climbs along the bulging taper surface of the inner centering die, the bulging taper surface of the spring clamp sleeve produces radial expansion, thereby realizing the bulging positioning of the cylinder part, the contact area of the bulging part is large, the part will not displace during forming processing, the part is uniformly stressed in the circumferential direction, the deformation of the part is greatly reduced, the forming precision of the end part of the cylinder is improved, the problem of high machining difficulty of the end part of the thin-walled cylinder part is solved, the product consistency is ensured, and the stability of product processing is effectively ensured.

[0014] 2. The die can be used in cooperation with numerical control equipment, the physical limiting structure on the die can realize the rapid clamping of the part, and the machining forming efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the utility model.

[0016] In the drawing: 1. horizontal pull rod, 2. inner centering die, 201. bulging taper surface, 202. bulging taper surface, 3. positioning block, 4. spring clamp sleeve, 401. bulging taper surface, 402. bulging taper surface, 403. annular groove, 404. front breaking point, 405. rear breaking point, 5. front support die, 501. annular forming groove, 502. distance column, 6. forming tail seat, 601. positioning boss, 7. sliding gland, 701. annular guide part, 702. annular working part. DETAILED DESCRIPTION

[0017] The utility model will be described in detail according to the description of the drawings.

[0018] As Figure 1 The barrel end forming die includes an inner centering die 2, a front support die 5 connected to the front end of the inner centering die 2 and concentric with the inner centering die, a sliding gland 7 located between the inner centering die 2 and the front support die 5, a horizontal pull rod 1 connected to the center of the sliding gland 7, a forming tail seat 6 used for cooperating with the front end face of the front support die 5, a spring sleeve 4 sleeved on the outer side of the inner centering die 2, and a positioning block 3 arranged at the rear end of the inner centering die 2.

[0019] The sliding gland 7 is composed of an annular guide part 701 connected to the horizontal pull rod 1 and an annular working part 702 arranged at the front outer edge of the annular guide part 701, and the inner centering die 2 is provided with an inner cavity matched with the annular guide part 701. The front support die 5 is annular, and the rear end face thereof is provided with a plurality of distance columns 502 connected to the inner centering die 2, and the annular working part 702 of the sliding gland 7 is provided with avoiding holes corresponding to the distance columns 502. The front end and the rear end of the outer peripheral surface of the inner centering die 2 are respectively provided with bulging conical surfaces 202 and 201, the front end and the rear end of the spring sleeve 4 are respectively provided with bulging conical surfaces 402 and 401 matched with the bulging conical surfaces 202 and 201 of the inner centering die 2, and the front end of the spring sleeve 4 is further provided with an annular groove 403 corresponding to the top surface of the annular working part 702.

[0020] The outer peripheral surfaces of the front support die 5 and the forming tail seat 6 cooperatively form an annular forming groove 501 adapted to the barrel end to be formed.

[0021] In the embodiment, the front end of the spring sleeve 4 is uniformly provided with a plurality of front breaking parts 404 extending to the rear end, the rear end of the spring sleeve 4 is uniformly provided with a plurality of rear breaking parts 405 extending to the front end, and the front breaking parts 404 and the rear breaking parts 405 are arranged alternately. The outer surface of the spring sleeve 4 is provided with a rubber coating to increase the friction and avoid scratches on the surface of the part.

[0022] The rear end of the inner centering die 2 is provided with an expanding surface, and the positioning block 3 is provided in a plurality of numbers and is fixed uniformly on the expanding surface to increase the limiting height of the barrel part. The rear end face of the inner centering die 2 is provided with a rear guide through hole corresponding to the horizontal pull rod 1. The front end face of the front support die 5 is provided with a positioning groove, and the rear end face of the forming tail seat 6 is provided with a positioning boss 601 matched with the positioning groove. The distance column 502 of the front support die 5 is provided with a stepped through hole in the inside, and the tip of a bolt passes through the stepped through hole and is connected and fixed with the inner centering die 2.

[0023] Working principle:

[0024] ReferenceFigure 1 The left end of the horizontal pull rod 1 is connected with the equipment hydraulic station through screw connection, and the right end is connected with the annular guide part 701 of the sliding gland 7. The inner centering die 2 is fixed on the equipment main shaft, and the forming tail seat 6 is connected with the equipment hydraulic station through bolts.

[0025] When clamping, the thin-walled cylinder blank is sleeved on the spring clamp sleeve 4 from the right side, and the end is close to the left positioning block 3. The equipment hydraulic station drives the horizontal pull rod 1 to move left, and the sliding gland 7 moves left with the horizontal pull rod 1. The annular working part 702 of the sliding gland 7 drives the spring clamp sleeve 4 to move left relative to the inner centering die 2. The bulging conical surface 402, 401 of the spring clamp sleeve 4 climbs along the bulging conical surface 202, 201 of the inner centering die 2, and the bulging conical surface 402, 401 of the spring clamp sleeve 4 generates radial expansion, so as to realize the bulging positioning of the thin-walled cylinder blank. The forming tail seat 6 moves left under the action of the equipment hydraulic station, and the front end of the outer peripheral surface cooperates with the front support die 5 to form the annular forming groove 501.

[0026] When processing, the thin-walled cylinder blank and the mold are rotated synchronously with the equipment main shaft, and the relative rolling of the spinning wheel (omitted in the figure) arranged around the part and the thin-walled cylinder blank is utilized to gradually process the end of the part to be attached to the annular forming groove 501, and the forming operation is completed.

[0027] After processing, the forming tail seat 6 and the horizontal pull rod 1 are reset under the action of the equipment hydraulic station, and the formed cylinder part can be taken out.

[0028] The above embodiment of the utility model is described in detail, but the content described can only be the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent change and improvement within the scope of the utility model can still belong to the scope of the patent.

Claims

1. A barrel end forming die characterized by: The device comprises an inner centering die, a front support die connected with the front end of the inner centering die and concentric with the inner centering die, a sliding gland between the inner centering die and the front support die, a horizontal pull rod connected with the center of the sliding gland, a forming tailstock matched with the front end surface of the front support die, a spring sleeve jacketed outside the inner centering die, and a positioning block arranged at the rear end of the inner centering die.

2. The barrel end-forming die of claim 1, wherein: The sliding gland is composed of an annular guide part connected with the horizontal pull rod and an annular working part arranged at the front outer edge of the annular guide part.

3. The barrel end-forming die of claim 1, wherein: The inner centering die is provided with an inner cavity matched with the annular guide part.

4. The barrel end-forming die of claim 1, wherein: The front support die is annular and its rear end surface is provided with a plurality of distance columns connected with the inner centering die.

5. The barrel end-forming die of claim 1, wherein: The outer surface of the spring sleeve is provided with a rubber coating.

6. The barrel end-forming die of claim 1, wherein: The rear end of the inner centering die is provided with an expanding taper surface.

7. The barrel end-forming die of claim 1, wherein: The front and rear ends of the spring sleeve are respectively provided with expanding taper surfaces matched with the expanding taper surfaces of the inner centering die. The front end of the spring sleeve is additionally provided with an annular groove corresponding to the top surface of the annular working part. The outer surface of the spring sleeve is provided with a rubber coating. The rear end of the inner centering die is provided with an expanding taper surface. The front and rear ends of the spring sleeve are respectively provided with expanding taper surfaces matched with the expanding taper surfaces of the inner centering die. The front end of the spring sleeve is additionally provided with an annular groove corresponding to the top surface of the annular working part. The outer surface of the spring sleeve is provided with a rubber coating. The rear end of the inner centering die is provided with an expanding taper surface. The front and rear ends of the spring sleeve are respectively provided with expanding taper surfaces matched with the expanding taper surfaces of the inner centering die. The front end of the spring sleeve is additionally provided with an annular groove corresponding to the top surface of the annular working part. The outer surface of the spring sleeve is provided with a rubber coating.

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