A device for spinning thin-walled tube bosses on a common lathe

Abstract

The invention discloses a device for spinning a thin-walled tube boss on a common lathe, comprising a rolling seat body, a sliding wedge block and a rolling slider, wherein the sliding wedge block is placed in a hole on one side of the end face of the rolling seat body, and is fixed to the rolling seat body through a step hole in the sliding wedge block via an M5 screw rod passing through a compression spring, the sliding wedge block can achieve a certain length of movement, and the compression spring can achieve the resetting of the sliding wedge block after the work is completed; the rolling slider is placed in a transverse through groove in the rolling seat body, and directional sliding is achieved through two guide pillars, an M8 internal thread is arranged on an outer cylindrical surface on one side of the rolling seat body, and a resetting spring controls the compression amount through a hexagon socket screw through a threaded hole, thereby improving special rolling equipment into common lathe equipment for processing, with low cost, high efficiency, reasonable technical design, and convenient use and replacement, thereby improving the rolling quality of the boss, providing a new solution for the rolling processing of the bent tube boss, and having good promotion and popularization.

Description

Technical Field

[0001] The invention belongs to the field of mechanical processing and relates to a device for spinning a thin-walled tube boss on a common lathe. Background Art

[0002] At present, the thin-walled tube bosses are processed by spinning. The short tube boss can generally be clamped on the lathe chuck with an arc mandrel, and the short thin-walled tube is sleeved on the mandrel. The position of the special mandrel boss is pressed into the tube wall using a spinning tool to center the special mandrel boss. During spinning, the tube is processed as the mandrel rotates. However, due to the large size of the bend, the long elbow cannot achieve rotation during spinning, and special equipment is required for rolling. During rolling, the elbow is first placed in two semicircular blocks and clamped. The rolling point uses multiple hardened steel balls. By pulling the tapered mandrel in the equipment, the steel balls are expanded for processing. The diameter of the rolled tube of the boss spinning equipment we currently use is between 28 and 70 mm, and the thickness is 2±0.5 mm. During the rolling process, the problem of steel balls scratching the raceway occurs, the surface quality does not meet the technical requirements, the scrap rate is high, and there is also the problem of high cost of special equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a device for spinning a thin-walled tube boss on a common lathe, thereby solving the above-mentioned problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A device for spinning a thin-walled tube boss on an ordinary lathe comprises a rolling seat body, a sliding wedge block and a rolling slider block. The sliding wedge block is placed in a hole on one side of the end face of the rolling seat body, and is fixed to the rolling seat body through a compression spring with an M5 screw rod through a step hole in the sliding wedge block. The sliding wedge block can achieve a certain length of movement, and the compression spring can achieve the reset of the sliding wedge block after the work is completed; the rolling slider block is placed in a transverse through groove in the rolling seat body, and directional sliding is achieved through two guide pillars. An M8 internal thread is arranged on the outer cylindrical surface of one side of the rolling seat body, and the reset spring controls the compression amount through a hexagon socket screw through a threaded hole to achieve adjustable elastic force, and its function is to reset the rolling slider block 7 and fit its inclined surface with the inclined surface of the sliding wedge block 13; after the spinning nut is screwed on the rolling seat body, the rolling seat body is installed on the lathe chuck;

[0006] It also includes a bent pipe clamping device and an eccentric fork device installed on a lathe tool holder. The bent pipe is installed in the bent pipe clamping device, and a shift rod is inserted into a cylindrical sleeve of a spinning nut.

[0007] Furthermore, the rolling slider is a trapezoidal structure, with a threaded positioning hole for installing the roller on the bottom surface to ensure the rigidity of the roller installation and the accuracy of positioning; two parallel cylindrical holes with high accuracy are arranged on the plane perpendicular to the bottom surface, and the other side is set as a slope with a fixed angle, so that it can move along the guide rod in a directional and stable manner under the push of the sliding wedge block, generating a sufficient rolling force.

[0008] Furthermore, the guide rod is a threaded pin-like structure, whose cylindrical surface matches the two sets of parallel holes corresponding to the rolling seat body and passes through the guide hole on the rolling slider. This ensures the smooth movement of the rolling slider during operation and increases the rigidity of the opening end of the rolling seat body during the connection with the eccentric nut.

[0009] Furthermore, it also includes a support screw with a step screw structure, whose threaded end is positioned and connected to the rolling slider; the roller is installed on the cylindrical surface of the support screw, and after the support screw is tightened, the roller rotates smoothly in a set space.

[0010] Furthermore, the sliding wedge block is a cylindrical inclined surface structure, and a needle roller is arranged on the end surface of the cylindrical rod. During the screwing process of the spun nut and the rolling seat body, rolling friction is generated between the needle roller and the bottom surface of the threaded hole of the spun nut, thereby preventing the end surface of the sliding wedge block and the bottom surface of the threaded hole of the spun nut from sliding and biting; the two sides of the inclined surface end are parallel planes, thereby limiting the rotation of the sliding wedge block during the transmission force process; the middle part is set as a stepped through hole, on which a compression spring is installed, and the compression amount is adjusted by a long screw rod, which is used for resetting the sliding wedge block after extrusion is completed; its inclined surface fits with the inclined surface of the rolling slider 7, so that the axial movement is converted into radial movement of the rolling slider 7.

[0011] Furthermore, the interior of the spun nut is a stepped hole structure; its thread rotation direction is left-handed, and the movement direction of the spun nut is controlled to be in the working state when the lathe rotates forward; its inner hole forms a matching relationship with the outer cylindrical surface of the rolling seat body to prevent tilting during the force application process; the stepped hole can limit the needle roller from slipping out of the sliding wedge during the spinning process; a cylindrical sleeve is welded on the outer cylindrical surface, and its function is to insert a lever to limit the spun nut from rotating and only move axially.

[0012] Furthermore, one end of the lever is processed with a groove and equipped with an O-ring. When inserted into the cylindrical sleeve on the spin-on nut, the compression of the O-ring generates tension to ensure that the lever does not fall off during operation and can be quickly removed; the other end is a hemispherical structure; by using it in conjunction with the eccentric fork device, it can be separated from the eccentric fork in the case of rolling overload, thereby playing a safety protection role.

[0013] Furthermore, the fork lever of the eccentric fork device is installed on the tool holder of the lathe, an eccentric hole is set in the fork lever, and two clamping screws are arranged on the side of the hole to press the eccentric fork placed in the hole. When the force is too large, the eccentric fork rotates and separates from the lever to protect the safety of the mechanism.

[0014] Furthermore, the bent tube clamping device is installed on the lathe tool holder, clamps the thin-walled tube and positions it on the axis of the lathe spindle, and keeps the thin-walled tube stable under the rolling force of the roller; it is a flip hinge structure. There is enough space when installing and removing the thin-walled tube, which is convenient for operation; its clamping method uses a rocker screw, which is easy and quick to operate and has a large clamping force.

[0015] Furthermore, it also includes a semicircular clamping block installed in the flip clamping slot of the bent pipe clamping device

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The semicircular clamping block of the present invention is of standard serialized size, installed in the flip card slot of the elbow clamping device, and used in conjunction with thin-walled tubes of different outer diameters; it has a large contact area and a large clamping force, and can effectively prevent the thin-walled tube from deforming.

[0018] 2. The device for spinning thin-walled tube bosses on a common lathe of the present invention is composed of a rolling device, a pipe bending clamping device, an eccentric fork device, etc. designed by us. The present invention improves the special rolling equipment into common lathe equipment processing, which has low cost, high efficiency, reasonable technical design, convenient use and replacement, improves the rolling quality of the boss, provides a new solution for the rolling processing of the pipe bending boss, and has good promotion and popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is an assembly diagram of the spinning device of the present invention;

[0021] Figure 2 It is the guide rod assembly diagram of the present invention;

[0022] Figure 3 It is a front schematic diagram of the boss of the spinning tube of the present invention;

[0023] Figure 4 This is a schematic diagram of the rear end of the spinning tube boss of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the rolling seat body of the present invention;

[0025] Figure 6 It is a schematic diagram of a rolling slider of the present invention;

[0026] Figure 7 It is a schematic diagram of the sliding wedge of the present invention;

[0027] Figure 8 It is a schematic diagram of opening the bent pipe clamping device of the present invention;

[0028] Fig. 9 The closed schematic diagram of the bending pipe clamping device of the present invention is

[0029] Fig.10 It is a schematic diagram of the eccentric fork device of the present invention;

[0030] Fig.11 Schematic diagram of the pipe bend.

[0031] Description of the drawings: 1- lever, 2- cylindrical sleeve, 3- spin-on nut, 4- rolling seat, 5- screw, 6- reset spring, 7- rolling slider, 8- roller, 9- support screw, 10- bent pipe, 11- compression spring, 12- screw, 13- sliding wedge, 1301- roller, 1302- wedge slider, 14- guide rod, 15- eccentric nut, 16- eccentric fork device, 1601- eccentric fork, 1602- fork knife rod, 17- bent pipe clamping device, 1701- locking handle, 1702- anti-falling sheet, 1703- replaceable semicircular sleeve, 1704- fixing sleeve, 1705- fixing pin. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0034] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] Embodiment 1

[0037] A preferred embodiment of the present invention provides a device for spinning a thin-walled tube boss on a common lathe, such as Figure 1 The present invention mainly includes: 1 lever, 2 cylindrical sleeve, 3 spin nut, 4 rolling seat, 5 screw, 6 compression spring, 7 rolling slider, 8 roller, 9 support screw, 10 bent pipe, 11 compression spring, 12 screw, 13 sliding wedge, 14 guide rod, 15 eccentric nut, 16 eccentric fork device, 17 bent pipe clamping device, etc. Among them: bent pipe clamping device 17 and eccentric fork device 16 are installed on the lathe tool holder, the position is adjusted, the slide in the lathe is fastened, and the bent pipe 10 is installed in the bent pipe clamping device 17. After installing the sliding wedge 13, rolling slider 7, guide rod 14, spinning nut 3, roller 8, support screw 9 and other fixture components on the rolling seat body 4, install it on the lathe chuck, insert the shift rod 1 into the cylindrical sleeve 2 and contact with the eccentric shift fork, start the lathe spindle at low speed, because the shift rod 1 limits the rotation of the spinning nut 3, the spinning nut 3 moves to the right on the rolling seat body 4, and pushes the roller 8 on the rolling slider 7 to spin the bending boss.

[0038] Specific operation: The present invention is a device for spinning a thin-walled tube boss on an ordinary lathe. During the spinning process of the spinning device, the relative positions of two fixed-angle inclined surfaces in the device change, and the movement direction and speed change according to the set proportional relationship between the inclined side and the right angle side. That is, during the process of the active element pushing the driven element to move, the driven element feeds along the guide rod, so that the roller deviates from the main shaft axis while rotating, rolling the bent tube fixed in the bent tube clamping device, so that the bent tube is gradually plastically deformed locally, thereby forming the required shape and size.

[0039] Embodiment 2

[0040] In this embodiment, on the basis of the first embodiment, the bent pipe clamping device includes a locking handle 1701, an anti-dropping / 1702, a replaceable semicircular sleeve 1703, a fixing sleeve 1704, and a fixing pin 1705; the eccentric fork device 16 includes an eccentric fork 1601 and a fork knife rod 1602;

[0041] Start the lathe spindle, the rolling seat body 4 rotates, and the eccentric fork device prevents the spinning nut 3 from rotating through the shift rod 1, but generates axial movement with the rolling seat body 4 during the relative screwing process, pushing the rolling slider 7 to deviate from the central axis, so that the roller 8 on the rolling slider 7 makes an eccentric rotation, rolling the inner side of the thin-walled tube installed in the bending tube clamping device 17, so that the thin-walled tube is partially expanded outward to form an arc-shaped boss.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for spinning a thin-walled tube boss on a common lathe, characterized in that: It comprises a rolling seat body (4), a sliding wedge (13) and a rolling slider (7), wherein the sliding wedge (13) is placed in a hole on one side of the end face of the rolling seat body (4), and the screw rod (12) passes through the compression spring (11) and is fixed to the rolling seat body (4) through the step hole in the sliding wedge (13); the rolling slider (7) is placed in a transverse through groove in the rolling seat body (4) and realizes directional sliding through two guide pillars, an internal thread is arranged on the outer cylindrical surface of one side of the rolling seat body (4), and the reset spring (6) is controlled by a hexagon socket screw through the threaded hole, and its inclined surface is in contact with the inclined surface of the sliding wedge (13); after the spinning nut (3) is screwed on the rolling seat body (4), the rolling seat body (4) is installed on the lathe chuck; It also includes a bent pipe clamping device (17) and an eccentric shift fork device (16) mounted on a lathe tool holder, wherein the bent pipe (10) is mounted in the bent pipe clamping device (17), and the shift rod (1) is inserted into a cylindrical sleeve (2) of a spin-on nut (3); The rolling slider (7) is a trapezoidal structure, with a threaded positioning hole for mounting the roller (8) on the bottom surface, two parallel cylindrical holes on a plane perpendicular to the bottom surface, and a fixed-angle inclined surface on the other side, so that it can move in a directional and stable manner along the guide rod (14) under the push of the sliding wedge block (13); The sliding wedge (13) is a cylindrical inclined surface structure, and a needle roller is arranged on the end surface of the cylindrical rod. During the process of screwing the nut (3) and the rolling seat (4), rolling friction is generated between the needle roller and the bottom surface of the threaded hole of the nut (3). The two sides of the inclined surface end are parallel planes, which limit the rotation of the sliding wedge (13) during the transmission force process. The middle part is set as a stepped through hole, and a compression spring (11) is installed. The compression amount is adjusted by a long screw rod, which is used for resetting the sliding wedge (13) after the extrusion is completed. Its inclined surface is in contact with the inclined surface of the rolling slider (7), so that the axial movement is converted into the radial movement of the rolling slider (7).

2. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: The guide rod (14) is a threaded pin-like structure, the cylindrical surface of which matches the two sets of parallel holes corresponding to the rolling seat body (4) and passes through the guide hole on the rolling slider (7).

3. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: It also includes a support screw (9) of a step screw structure, the threaded end of which is positioned and connected to the rolling slider (7); the roller (8) is mounted on the cylindrical surface of the support screw (9), and after the support screw (9) is tightened, the roller (8) can rotate smoothly in a set space.

4. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: The interior of the spun nut (3) is a stepped hole structure; the thread rotation direction is left-handed, and the movement direction of the spun nut (3) is controlled to be in a working state when the lathe rotates forward; the inner hole forms a matching relationship with the outer cylindrical surface of the rolling seat body (4), and the stepped hole can limit the needle roller from sliding out of the sliding wedge block (13) during the spinning process; a cylindrical sleeve (2) is welded on the outer cylindrical surface, and its function is to insert the lever (1) to limit the spun nut (3) from rotating and only move axially.

5. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: One end of the lever (1) is processed with a groove and equipped with an O-ring, and the other end is a hemispherical structure.

6. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: The fork lever (1602) of the eccentric fork device (16) is mounted on a lathe tool holder, an eccentric hole is provided in the fork lever (1602), and two clamping screws are arranged on the side of the hole to press the eccentric fork (1601) placed in the hole.

7. The device for spinning a thin-walled tube boss on a common lathe according to claim 1, characterized in that: The bent tube clamping device (17) is installed on the lathe tool holder, clamps the thin-walled tube and positions it on the axis of the lathe spindle, and keeps the thin-walled tube stable under the rolling pressure of the roller (8); it is a flip hinge structure.

8. The device for spinning a thin-walled tube boss on a common lathe according to claim 7, characterized in that: It also includes a semicircular clamping block installed in the flipping slot of the bent pipe clamping device (17).

Images