CN213496574U - Tool for machining thin-walled cylinder by positive and negative expansion of double taper sleeve - Google Patents

Abstract

A tool for machining a thin-walled cylinder by positive and negative expansion of a double-cone sleeve belongs to the field of machining. The utility model discloses a first taper sleeve, second taper sleeve, dabber and packing ring, the spindle is equipped with first taper sleeve and second taper sleeve respectively, and the packing ring passes through lock nut to be installed at the dabber both ends, waits to process a thin wall section of thick bamboo. The tool cone sleeve is convenient to disassemble, the production efficiency is high, a process route for batch production can be formed, batch production is realized, the production cost is saved, and the benefit is improved.

Description

Tool for machining thin-walled cylinder by positive and negative expansion of double taper sleeve

Technical Field

The utility model relates to a frock of a bipyramid cover positive and negative tight processing thin wall section of thick bamboo belongs to the machining field.

Background

Most of parts on the equipment have certain weight limit requirements on weight, and overweight is not allowed, so the parts generally adopt weight reduction structures such as common thin-wall cylindrical parts in design, but the structures bring certain difficulty to subsequent part processing.

For example, a thin-walled cylinder (as shown in fig. 2) is used in a device, and the thin-walled cylinder has high requirements on the dimensional accuracy, form and position tolerance and surface roughness of inner and outer circles. The total length of the part is 180mm, and the diameter of the inner circle

The tolerance range is 0 ~ 0.06, and final wall thickness is 0.9mm, interior, excircle surface roughness Ra3.2, and the axiality of interior circle and excircle is 0.05mm, and drum inner wall intermediate position has a thickness 1.5mm, and the width is the ring muscle of 3mm (mark 9 department in the attached figure 2) for the rigidity of fixed section of thick bamboo internal equipment and increase section of thick bamboo wall. The thin-wall cylinder part can be machined by turning in addition to gradual drawing forming and powerful spinning forming.

The two processing methods of gradual stretching forming and powerful spinning forming have complex working procedures, higher cost and lower finished product precision, and can only form a thin-wall cylinder part with a simple structure, the two methods cannot form the thin-wall cylinder part and can only adopt a turning process method, in addition, the thin-wall cylinder part has very thin wall thickness which is less than 1mm, although the middle part is provided with the annular rib, the radial rigidity is also very low, and the thin-wall cylinder part is easily subjected to the influence of factors such as cutting force, cutting heat, clamping force and the like in the turning process and is easy to generate processing deformation.

The existing turning method is characterized in that both inner circles and outer circles have allowance, the outer circle of a part is clamped under the condition of ensuring radial rigidity, the inner circle of a cylinder is machined to the size, and the size precision and the roundness of the inner wall of the part are ensured. Then, an ordinary single expansion sleeve and a matching mandrel are adopted to expand the inner circle on one side of the part ring rib, and the outer circle of the expansion side is processed on a lathe to the required size. Then, the expansion sleeve and the mandrel are detached and taken out, the expansion sleeve and the mandrel are installed on the expansion inner circle of the other side of the ring rib, the outer circle of the side is continuously machined to the required size, the processing scheme is that the cylinder is clamped by turning around twice, the outer circle of the cylinder is machined twice, a connecting cutter is arranged in the middle, the coaxiality and the size precision of the outer circle of the cylinder are not easy to guarantee, the production efficiency is low, and the expansion sleeve and the mandrel are not suitable for organizing mass production.

Therefore, it is necessary to provide a tool for forward and backward expanding and processing a thin-walled cylinder by using a double taper sleeve and a tool installation method, so as to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses research and development purpose is in order to solve the preparation one kind and can dodge the tight frock of expanding of waiting to process a thin wall section of thick bamboo inner ring muscle, and a clamping machine takes shape, guarantees to wait to process the easy deformable difficult problem of this kind of thin wall section of thick bamboo clamping of turning, has given about in the following the utility model discloses a brief summary, so that provide about the utility model discloses a certain aspect's basic understanding. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.

The technical scheme of the utility model:

the tool for machining the thin-walled cylinder by positive and negative expansion of the double taper sleeves comprises a first taper sleeve, a second taper sleeve, a mandrel and washers, wherein the first taper sleeve and the second taper sleeve are respectively sleeved on the mandrel, and the washers are installed at two ends of the mandrel through locking nuts to wait for machining the thin-walled cylinder.

Preferably: an oil groove is processed on the outer wall of the second taper sleeve.

Preferably: the dabber includes dabber body and threaded rod, and the threaded rod is installed at both ends about the dabber body.

Preferably: the mandrel body is an olive-shaped double inverted cone.

Preferably: and central holes are processed at two ends of the mandrel. And expansion openings are processed on the first taper sleeve and the second taper sleeve. The utility model provides a frock of double taper sleeves positive and negative tight processing thin wall section of thick bamboo, includes first taper sleeve, second taper sleeve, dabber and dismantlement swivel nut, and the spindle is overlapped respectively and is equipped with first taper sleeve and second taper sleeve, and the processing of dismantlement swivel nut outer cylinder has the screw thread, and first taper sleeve and second taper sleeve are installed to the one end far away from relatively, and the interior hole suit of dismantling the swivel nut is on the dabber threaded rod.

Preferably: an oil groove is processed on the outer wall of the second taper sleeve.

Preferably: the dabber includes dabber body and threaded rod, and the threaded rod is installed at both ends about the dabber body.

Preferably: the mandrel body is an olive-shaped double inverted cone.

Preferably: and central holes are processed at two ends of the mandrel. And expansion openings are processed on the first taper sleeve and the second taper sleeve.

The utility model discloses following beneficial effect has:

1. the utility model discloses a double-cone sleeve positive and negative expansion thin-walled cylinder processing tool, which effectively avoids the ring rib inside the cylinder body and solves the problem that the parts need to be expanded and clamped twice;

2. the utility model discloses a double-cone sleeve positive and negative expansion machining thin-wall cylinder's frock has realized the one-time clamping and has processed the mesh of thin-wall cylinder spare excircle on the lathe, has guaranteed the inside and outside circular dimension precision and the axiality requirement of thin-wall cylinder;

3. the utility model discloses a frock of double taper sleeve positive and negative expansion processing thin-walled cylinder, the frock taper sleeve is dismantled conveniently, and production efficiency is high to can form batch production's process route, realize batch production, practice thrift manufacturing cost, improve the benefit;

4. the utility model discloses a double-cone sleeve positive and negative expansion thin-walled cylinder processing tool, the dismounting method is simple, and the thread ejection structure is easy to realize;

5. the utility model discloses a frock of two taper sleeve positive and negative tight processing thin wall section of thick bamboo, simple structure, design benefit, reasonable and practical, easy dismounting, equipment are firm, low cost, and the replicable popularization nature of structure principle is strong, is suitable for using widely.

Drawings

FIG. 1 is a schematic structural view of a tool for machining a thin-walled cylinder by forward and reverse expansion of a double-cone sleeve;

FIG. 2 is a perspective view of a thin-walled cylinder to be processed;

FIG. 3 is a schematic structural diagram of a second embodiment;

FIG. 4 is a schematic view of the installation of the first taper sleeve, the second taper sleeve and the mandrel;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic view of the removable insert;

FIG. 7 is a perspective view of the removable insert;

FIG. 8 is an enlarged view taken at I of FIG. 1;

in the figure, 1-a thin-wall cylinder to be processed, 2-a first taper sleeve, 3-a second taper sleeve, 4-a mandrel, 5-a disassembly thread sleeve, 6-a gasket, 7-a locking nut, 8-an oil groove, 9-a ring rib, 10-an expansion opening, 31-a taper sleeve internal thread, 41-a mandrel body, 42-a threaded rod, 43-a central hole, 51-an inner hole and 52-an annular oil groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The utility model discloses the connection that mentions divide into fixed connection and can dismantle the connection, fixed connection is for the conventional fixed connection mode such as undetachable connection including but not limited to hem connection, rivet connection, adhesive connection and welded connection, can dismantle the connection including but not limited to conventional dismantlement modes such as threaded connection, buckle connection, pin joint and hinged joint, when not clearly prescribing a limit to concrete connection mode, acquiesces to always can find at least one kind of connected mode in current connected mode and can realize this function, and the technical staff in the art can select by oneself as required. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 7, and the tool for machining the thin-walled cylinder by positive and negative expansion of the double taper sleeve of the embodiment includes a first taper sleeve 2, a second taper sleeve 3, a mandrel 4 and a washer 6, as shown in fig. 1, the mandrel 4 is respectively sleeved with the first taper sleeve 2 and the second taper sleeve 3, the washer 6 is installed at two ends of the mandrel 4 through a lock nut 7, the diameter of the washer 6 is greater than the inner diameter of the outer end of the taper hole of the first taper sleeve 2 and the outer end of the taper hole of the second taper sleeve 3, the first taper sleeve 2 and the second taper sleeve 3 are provided with expansion openings 10, and the expansion structures of the first taper sleeve 2 and the second taper sleeve 3 avoid the limitation of a middle ring rib 9 in the thin-walled cylinder 1 to be machined, and. The coaxiality of the inner circle and the outer circle of the thin-wall cylinder is easy to guarantee in the turning process, the thickness of the cylinder wall is uniform, and the tool is used when the outer circle of the thin-wall cylinder is turned to the required final size;

during installation, the first taper sleeve 2 is firstly sleeved on one side of the mandrel 4 and fixedly installed through the washer 6 and the lock nut 7, the expansion degree between the first taper sleeve 2 and the mandrel 4 is low, the thin-walled cylinder 1 to be processed is installed on the outer side of the first taper sleeve 2, the lock nut 7 is adjusted to enable the inner wall of the thin-walled cylinder 1 to be processed and the outer wall of the first taper sleeve 2 to be expanded and installed, then the second taper sleeve 3 is installed, the second taper sleeve 3 is fixedly installed through the washer 6 and the lock nut 7, the lock nuts 7 on two sides are adjusted to enable the outer walls of the first taper sleeve 2 and the second taper sleeve 3 to be completely expanded and attached to the inner wall of the thin-walled cylinder 1 to be processed, and finally the installed workpiece tool assembly is installed on.

The second embodiment is as follows: the present embodiment is described with reference to fig. 1 to 7, and based on the first embodiment, the tool for machining a thin-walled cylinder by positive and negative expansion of a double-cone sleeve of the present embodiment includes a first cone sleeve 2, a second cone sleeve 3, a mandrel 4 and a dismounting screw sleeve 5, as shown in fig. 3, the mandrel 4 is respectively sleeved with the first cone sleeve 2 and the second cone sleeve 3, an outer cylindrical surface of the dismounting screw sleeve 5 is threaded, the dismounting screw sleeve 5 is installed at a far end of the first cone sleeve 2 and the second cone sleeve 3, an inner hole 51 of the dismounting screw sleeve 5 is sleeved on a threaded post of the mandrel 4, a top pressure surface of the dismounting screw sleeve 5 contacting with an end of the mandrel 4 is provided with an annular oil groove 52, expansion openings 10 are machined on the first cone sleeve 2 and the second cone sleeve 3, and expansion structures of the first cone sleeve 2 and the second cone sleeve 3 avoid the limitation of a middle ring rib 9 in the thin-walled cylinder 1 to be machined, because the tool of the present embodiment is a bidirectional reverse cone sleeve, after the thin-wall cylinder 1 to be processed is processed, the mandrel 4 is not easy to withdraw from one end to enable the diameter of the first taper sleeve 2 and the second taper sleeve 3 to shrink, and then the first taper sleeve 2 and the second taper sleeve 3 are disassembled, therefore, the disassembling screw sleeve 5 for disassembling the second taper sleeve 3 is added to the tool of the embodiment, the external thread of the disassembling screw sleeve 5 is screwed on the second taper sleeve 3 with the internal thread, the taper sleeve 3 at one end is ejected out during disassembling, the task of disassembling the tool is completed, the tool structure of the double taper sleeve and the olive-shaped inverted-cone-shaped mandrel 4 for expanding the thin-wall cylinder in the forward and reverse directions is adopted, the interference limitation of the middle ring rib of the thin-wall cylinder 1 to be processed is avoided, the difficult problem that the cylinder body of the thin-wall cylinder 1 to be processed is not easy to expand by adopting the matching of the single taper sleeve and the mandrel 4 is solved.

The third concrete implementation mode: with reference to fig. 1 to fig. 7, the embodiment is described, based on a first specific embodiment, in the tool for machining the thin-walled cylinder by forward and backward expansion of the double-tapered sleeve of the embodiment, an oil groove 8 is machined on the outer wall of the second tapered sleeve 3 along the direction of the excircle generatrix, and the oil groove 8 is used for reducing friction between the second tapered sleeve 3 and the inner wall of the thin-walled cylinder 1 to be machined when the second tapered sleeve 3 is disassembled; an annular oil groove 52 is formed in the top pressing surface of the dismounting screw sleeve 5, and is used for reducing friction between the top pressing surface of the dismounting screw sleeve 5 and the end surface of the mandrel 4, so that the second taper sleeve 3 can be taken out conveniently, and the dismounting screw sleeve 5 can be pushed and released to apply pressure.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 7, and the tool for processing the thin-walled cylinder by forward and reverse expansion of the double-cone sleeve of the embodiment includes a mandrel body 41 and a threaded rod 42, the threaded rod 42 is installed at the left end and the right end of the mandrel body 41, and the threaded rod 42 facilitates the thread fit installation of the lock nut 7, so that the relative fixing structure is more stable.

The fifth concrete implementation mode: the embodiment is described by combining fig. 1-7, and the tool for processing the thin-walled cylinder by positive and negative expansion of the double taper sleeve of the embodiment is characterized in that the mandrel body 41 is in an inverted cone shape, the olive-shaped inverted cones are two frustum bases arranged in mirror symmetry, the two ends of each frustum base are thin and the middle of each frustum base is thick, the first taper sleeve 2 and the second taper sleeve 3 are sleeved on the two sides of the mandrel body 41, the distance between the first taper sleeve 2 and the second taper sleeve 3 and the maximum center diameter of the mandrel body 41 is adjusted by disassembling the screw sleeves 5 or the lock nuts 7, the expansion opening 10 is opened, the diameter of the outer wall of the cone is increased, and then the inner wall expansion installation of the thin-walled cylinder 1 to be processed is completed, so that the size of the radial cross section of the first taper sleeve 2 and the second taper sleeve 3 is adjusted more flexibly, the expansion degree is higher.

The sixth specific implementation mode: the tool for machining the thin-walled cylinder by forward and reverse expansion of the double-conical sleeve is described with reference to fig. 1 to 7, and central holes 41 are machined at two ends of the mandrel 4, so that the tool is convenient to fixedly mount and align with a lathe.

The seventh embodiment: the embodiment is described with reference to fig. 1 to 7, and the method for installing the tool for forward and reverse expansion machining of the thin-walled cylinder by the double taper sleeves of the embodiment comprises the following installation steps:

step a, before use, firstly processing the excircle of the thin-wall cylinder 1 to be processed on a lathe by using a thick-wall cylindrical blank and reserving the excircle, and ensuring that a three-jaw chuck clamps the excircle of the thin-wall cylinder 1 to be processed when the inner circle of the thin-wall cylinder 1 to be processed is processed, and the cylinder wall of the thin-wall cylinder 1 to be processed is not deformed;

b, processing the inner circle and the middle ring rib of the thin-wall cylinder 1 to be processed to required sizes;

step c, when in use, the first taper sleeve 2 and the olive-shaped inverted cone in the middle of the mandrel 4 are preassembled together;

step d, the first taper sleeve 2 and the mandrel 4 which are preassembled in the step c are arranged in the barrel of the thin-wall barrel 1 to be processed after being processed in the step b, the distance between the ring ribs 9 on the right end face of the first taper sleeve 2 is controlled to be L1, the distance between the ring ribs L1 and the left end face of the ring ribs L1 is 8-12 mm, and when the first taper sleeve 2 is reserved to be expanded, the axial displacement of the first taper sleeve 2 towards the mandrel 4 is reserved;

step e, locking the first taper sleeve 2 by using a washer 6 and a lock nut 7, and ensuring that the distance between the right end face of the first taper sleeve 2 and the left end face of the ring rib 9 after expansion is L3 and L3 is 2-4 mm;

step f, then, a second taper sleeve 3 is arranged at the other end of the barrel body of the thin-wall barrel 1 to be processed and the mandrel 4, the distance between the left end face of the second taper sleeve 3 and the right end face of the ring rib 9 is about L2, L2 is 8-12 mm, and when the second taper sleeve 3 is reserved, the axial displacement of the second taper sleeve 3 towards the mandrel 4 is reserved;

step g, locking and locking the second taper sleeve 3 by using a washer 6 and a locking nut 7, and ensuring that the distance between the left end face of the second taper sleeve 3 and the right end face of the ring rib 9 after expansion is about L4, and L4 is 2-4 mm;

h, clamping the thin-walled cylinder 1 to be machined on a lathe after the thin-walled cylinder is expanded in a two-way mode, clamping one end of a mandrel 4 by three claws of a main shaft, pushing the other end of the mandrel 4 to a central hole 41 of the mandrel 4 by using a tip, aligning the mandrel 4, and machining the outer circle of the thin-walled cylinder 1 to be machined to a required size;

disassembling:

step i, after the thin-walled cylinder 1 to be processed is processed, the thin-walled cylinder 1 is dismounted from a lathe, locking nuts 7 and gaskets 6 at two ends are dismounted, a dismounting threaded sleeve 5 is sleeved into one end of a mandrel 4, an external thread of the dismounting threaded sleeve 5 is firstly screwed with an internal thread of a second taper sleeve 3 at the same side, the dismounting threaded sleeve 5 is screwed until a top pressing surface at the front end of the dismounting threaded sleeve 5 is contacted with the shaft end of the mandrel 4, the dismounting threaded sleeve 5 is pulled continuously, the dismounting threaded sleeve 5 does not move forwards axially at the moment, the second taper sleeve 3 is driven outwards by the external thread of the dismounting threaded sleeve 5 to withdraw for a certain displacement, the second taper sleeve 3 contracts to form a gap with the inner circle of the thin-walled cylinder 1 to be processed, and the taper sleeve 3 and the. Applying axial force to the mandrel 4 from the other end of the thin-walled cylinder 1 to be processed to separate the first taper sleeve 2 from the mandrel 4, enabling the first taper sleeve 2 to contract to form a gap with the inner circle of the thin-walled cylinder 1 to be processed, continuing applying axial force to withdraw the mandrel 4, and detaching the first taper sleeve 2;

and j, checking that the processed thin-walled cylinder 1 to be processed is qualified according to the guarantee requirement.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a frock of thin wall section of thick bamboo of positive and negative expansion processing of bipyramid cover which characterized in that: the novel taper sleeve comprises a first taper sleeve (2), a second taper sleeve (3), a mandrel (4) and gaskets (6), wherein the mandrel (4) is sleeved with the first taper sleeve (2) and the second taper sleeve (3) respectively, and the gaskets (6) are installed at two ends of the mandrel (4) through locking nuts (7).

2. The utility model provides a frock of thin wall section of thick bamboo of positive and negative expansion processing of bipyramid cover which characterized in that: the core shaft dismounting device comprises a first taper sleeve (2), a second taper sleeve (3), a core shaft (4) and a dismounting screw sleeve (5), wherein the core shaft (4) is sleeved with the first taper sleeve (2) and the second taper sleeve (3) respectively, the outer wall of the dismounting screw sleeve (5) is processed with threads, the dismounting screw sleeve (5) is installed at one end, far away from the first taper sleeve (2) and the second taper sleeve (3), and an inner hole (51) of the dismounting screw sleeve (5) is installed on the core shaft (4).

3. The tool for machining the thin-walled cylinder by forward and reverse expansion of the double conical sleeves according to claim 1 or 2, wherein the tool comprises: an oil groove (8) is machined in the outer wall of the second taper sleeve (3).

4. The tool for machining the thin-walled cylinder by forward and reverse expansion of the double conical sleeves according to claim 1 or 2, wherein the tool comprises: the mandrel (4) comprises a mandrel body (41) and a threaded rod (42), and the threaded rod (42) is installed at the left end and the right end of the mandrel body (41).

5. The tool for machining the thin-walled cylinder by forward and reverse expansion of the double-cone sleeve according to claim 4, is characterized in that: the mandrel body (41) is an olive-shaped inverted cone.

6. The tool for machining the thin-walled cylinder by forward and reverse expansion of the double conical sleeves according to claim 1 or 2, wherein the tool comprises: and central holes (43) are processed at two ends of the mandrel (4).

7. The tool for machining the thin-walled cylinder by forward and reverse expansion of the double conical sleeves according to claim 1 or 2, wherein the tool comprises: expansion openings (10) are processed on the first taper sleeve (2) and the second taper sleeve (3).

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