CN112338574A - Self-centering lathe center frame - Google Patents
Self-centering lathe center frame Download PDFInfo
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- CN112338574A CN112338574A CN202011493418.2A CN202011493418A CN112338574A CN 112338574 A CN112338574 A CN 112338574A CN 202011493418 A CN202011493418 A CN 202011493418A CN 112338574 A CN112338574 A CN 112338574A
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- arm
- support
- central arm
- shaft
- roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
- B23Q1/76—Steadies; Rests
- B23Q1/763—Rotating steadies or rests
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- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention discloses a self-centering lathe center frame which comprises a shell, a center arm and two support arms, wherein the center arm is arranged on the shell; the front ends of the central arm and the two support arms are respectively provided with a support wheel set; the central arm is a cylinder body of an oil cylinder hidden in the shell, the end of a piston rod of the oil cylinder is provided with a safety valve, and the safety valve is arranged on the rear end face of the shell; the upper and lower side surfaces of the central arm are symmetrically provided with roller groups, and the rear section of the support arm is formed with an outward convex arc-shaped rolling surface which is in rolling contact fit with the roller groups; the central arm advances under the action of hydraulic pressure, simultaneously pushes the two support arms to synchronously move and fold through the rolling force application of the roller group so as to control the workpiece in a circle formed by the support points of the three support wheel groups, and the central arm is hinged with a return plate which is used for driving the support arms to open and reset when the central arm retreats. The invention adopts the design of the built-in oil cylinder, reduces the overall dimension of the center frame, enlarges the clamping range, has high reliability and good use performance, and is suitable for machine tools with small installation space and large clamping range.
Description
Technical Field
The invention relates to the technical field of machining equipment, in particular to a center frame applied to a lathe, and particularly relates to a self-centering lathe center frame.
Background
The center frame is an auxiliary supporting device used in the turning or grinding process of slender shaft parts, so that the high-precision processing of parts such as superfine optical shafts, precision lead screws, ball screws and the like becomes possible. In the prior art, a mechanical three-jaw transfer center frame is generally adopted on a lathe, the center frame is troublesome in workpiece center adjustment, and is difficult to mount on a machine tool with small space and large clamping range due to the problems of large overall dimension and small clamping range.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a self-centering lathe center rest which adopts a built-in oil cylinder design, has small volume and large clamping range and can automatically adjust the center position of a workpiece.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a self-centering lathe center frame comprises a housing with a corner-wiping flat cuboid structure, a center arm arranged at the center position in the housing in a front-back sliding manner and two support arms hinged on the housing in a lever manner; the front ends of the central arm and the two support arms are respectively provided with a support wheel set which is used for rolling and supporting the processed workpiece; the central arm is a cylinder body of an oil cylinder which is hidden in the shell, the end of a piston rod of the oil cylinder is provided with a manual-automatic integrated safety valve, and the safety valve is fixedly arranged on the rear end surface of the shell through a connecting bolt and also serves as a fixed fulcrum of the oil cylinder; the two support arms are arranged up and down symmetrically by taking the axial lead of the central arm as a symmetrical axis, the upper side surface and the lower side surface of the central arm are symmetrically provided with roller groups which are used for applying torque to the support arm at the corresponding side in a rolling way when the central arm extends forwards, and the rear section of each support arm is formed with an outer convex arc-shaped rolling surface which is in rolling contact with and matched with the roller groups; the central arm advances under the action of hydraulic pressure, simultaneously pushes the two support arms to synchronously move and fold through the rolling force application of the roller group so as to control the workpiece in a circle formed by the support points of the three support wheel groups, and the central arm is hinged with a return plate which is used for driving the support arms to open and reset when the central arm retreats.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the shell consists of a main shell body formed with an assembly cavity and a cover plate matched with the main shell body in a covering way; the safety valve is fixed on the rear end face of the main shell body, a rear notch enabling the piston rod to penetrate through to be connected with the safety valve is formed in the rear end face of the main shell body, a guide sliding opening used for providing a guide effect for front and rear sliding of the central arm is formed in the front end face of the main shell body, a right supporting lug protruding forwards is formed in the upper end and the lower end of the guide sliding opening in the front end face of the main shell body respectively, two left supporting lugs are correspondingly formed on the cover plate, and supporting shaft holes are formed in the left supporting lug and the right supporting lug.
The supporting arm is of an S-shaped structure, a rotating shaft serving as a lever fulcrum is rotatably arranged in the middle section of the supporting arm in a penetrating manner, the right end of the rotating shaft is positioned and arranged in a supporting shaft hole of a right supporting lug of the main shell, and the left end of the rotating shaft is positioned and arranged in a supporting shaft hole of a left supporting lug of the cover plate; the rear section of the support arm is located in the assembly cavity of the main housing, and the front section of the support arm is located outside the main housing.
The roller group consists of a roller seat, a roller shaft and a roller; the roller is rotationally sleeved on the roller shaft and is in rolling and pressing contact with the convex arc-shaped rolling surface at the rear section of the support arm; the roller shaft positioning support is arranged on the roller seat, and the roller seat is welded and fixed at the rear end of the central arm.
The return plate is a triangular steel plate with an arc apex angle, a hinge hole which is rotatably sleeved at the left end of the roller shaft is formed in the return plate, a first strip-shaped slide way and a first pin hole are further formed in the return plate, and a first pin shaft is fixedly installed in the first pin hole; a second bent slideway and a second pin hole are formed in the left end face of the rear section of the support arm, and a second pin shaft is fixedly installed in the second pin hole; the first pin shaft on the return plate is matched with the second slideway on the support arm in a sliding manner, and the second pin shaft on the support arm is matched with the first slideway on the return plate in a sliding manner.
The supporting wheel set comprises a supporting wheel shaft and a supporting wheel which is rotatably sleeved on the supporting wheel shaft and is used for being in rolling contact with and matched with a workpiece; the front end angle of the support arm is adjustably provided with an iron scrap protection fan housing, and a support wheel set arranged on the support arm is positioned and arranged in the iron scrap protection fan housing; the front end surface of the central arm is formed with a concave slot cavity, and a support wheel set arranged on the central arm is positioned and installed in the slot cavity formed on the central arm.
The iron scrap protection fan housing and the groove cavity of the central arm are respectively provided with a positioning groove for positioning and supporting the supporting wheel shaft, the iron scrap protection fan housing is provided with a locking block for pressing the fixed supporting wheel shaft, and the central arm is provided with a pressing plate for pressing the fixed supporting wheel shaft.
The scrap iron protection fan cover is provided with a connecting hole for connecting the water curtain system, and a cover opening of the scrap iron protection fan cover is provided with a spray hole; the safety valve is provided with an oil inlet and an oil outlet.
Compared with the prior art, the central arm is a cylinder body of an oil cylinder hidden in the shell, the central arm is provided with a roller group which can push the two support arms to synchronously move and close when the central arm moves forwards, and the central arm is also hinged with a returning plate which drives the support arms to open and reset when the central arm moves backwards. The invention utilizes the hydraulic drive center arm and the support wheel sets on the two support arms to move, and can always control the workpiece in a circle formed by the support points of the three support wheel sets, thereby realizing the self-centering function of the center frame. Under the same condition, compared with the mechanical three-jaw transfer center frame commonly adopted on the current lathe, the invention can greatly save the time for loading and unloading the workpiece and can reduce the trouble for adjusting the center of the workpiece. The invention adopts the design of the built-in oil cylinder, reduces the overall dimension of the center frame, enlarges the clamping range, has high reliability and good use performance, and is suitable for machine tools with small installation space and large clamping range.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a front view structural view of the present invention (the dotted line in the figure indicates a circle made up of support points of three support wheels);
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a schematic view of the mounting structure of the support arm and the main housing of the present invention;
FIG. 6 is a schematic view of the mounting structure of the oil cylinder and the safety valve according to the present invention;
FIG. 7 is a schematic perspective view of a regression plate according to the present invention;
FIG. 8 is a schematic view of the present invention with the center arm retracted and the support arm extended;
FIG. 9 is a schematic view of the present invention with the center arm advanced and the arms closed.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 to 9 are schematic views of construction and wall piles according to the present invention.
Wherein the reference numerals are: the device comprises a rotating shaft L, a connecting bolt T, a first pin shaft Z1, a second pin shaft Z2, a shell 1, an assembly cavity 1a, a rear notch 1b, a main shell 11, a cover plate 12, a right supporting lug 13, a left supporting lug 14, an oil cylinder 2, a central arm 21, a support arm 3, an arc rolling surface 3a, a second slide way 31, a second pin hole 32, a supporting wheel set 4, a supporting wheel 41, a safety valve 5, an oil inlet 5a, an oil outlet 5b, a roller set 6, a roller seat 61, a roller shaft 62, a roller 63, a return plate 7, a hinge hole 7a, a first slide way 7b, a first pin hole 7c, a scrap iron protection fan cover 8, a connecting hole 8a, a spray hole 8b, a locking block 81 and a pressure plate 9.
As shown in fig. 1 to 9, the present invention provides a center rest of a self-centering lathe, which uses hydraulic power, and comprises a housing 1 with four corners removed and a flat rectangular structure, a center arm 21 which is slidably arranged at the center position in the housing 1 in a front-back manner, and two support arms 3 which are hinged on the housing 1 in a lever manner. The front end of the central arm 21 and the front ends of the two support arms 3 are respectively provided with a support wheel set 4, and the three support wheel sets 4 are used for being matched with a processed workpiece in a rolling support mode and clamping the workpiece in a circle formed by the support wheel sets 4. The greatest contribution of the present invention is that the center arm 21 is the cylinder body of the cylinder 2 built in the housing 1, that is, the present invention directly utilizes the cylinder body of the cylinder 2 as the center arm 21. The end of the piston rod of the oil cylinder 2 is provided with an integrated manual-automatic safety valve 5. The safety valve 5 is provided with an oil inlet 5a and an oil outlet 5b for providing hydraulic oil for the oil cylinder 2. Four mounting holes are formed in the safety valve 5, the safety valve 5 penetrates through the mounting holes of the safety valve 5 through four connecting bolts T, the safety valve 5 is fixed on the rear end face of the outer shell 1, and the safety valve 5 and the outer shell 1 are fixed into a whole, so that the safety valve 5 can serve as a fixing fulcrum of the oil cylinder 1, and a cylinder body of the oil cylinder 2, namely the central arm 21, can slide back and forth. The two arms 3 are disposed vertically symmetrically about the axis of the center arm 21, and the arm 3 located above the center arm 21 is referred to as an upper arm, and the arm 3 located below the center arm 21 is referred to as a lower arm. As shown in fig. 6 and 5, the upper side and the lower side of the central arm 21 are symmetrically provided with a roller set 6, the roller sets 6 are fixed at the rear end of the central arm 21 and can move synchronously with the central arm 21, when the central arm 21 extends forwards under the hydraulic action, the roller set 6 arranged on the upper side of the central arm 21 can roll the rear section of the upper arm to apply a moment, and the roller set 6 arranged on the lower side of the central arm 21 can roll the rear section of the lower arm to apply a moment, so that the front ends of the two support arms 3 are forced to move together. As is apparent from fig. 5, the rear end of the arm 3 is formed with an outwardly convex curved rolling surface 3a which is in rolling contact with the roller group 6. The central arm 21 of the invention can advance under the action of hydraulic pressure and push the two support arms 3 to synchronously move and fold through the rolling force application of the roller group 6, thereby controlling the workpiece in a circle formed by the support points of the three support wheel groups 4 and realizing the self-centering adjustment of the central frame. The center of a circle formed by the fulcrums of the three support wheel sets 4 falls on the central axis of the central arm 21. The center arm 21 of the present invention is further hinged with a returning plate 7, and the returning plate 7 is used for driving the support arm 3 to open and reset when the center arm 21 retreats, such as the position shown in fig. 8.
The invention adopts a hydraulic oil cylinder to push the middle central arm and simultaneously drive the three supporting wheel sets to move. Under the same condition, compared with the mechanical three-jaw transfer center frame commonly adopted on the current lathe, the time for loading and unloading the workpiece can be greatly saved, and the trouble for adjusting the center of the workpiece can be reduced. The center frame adopts the design of the built-in oil cylinder, reduces the appearance size of the center frame, enlarges the clamping range and is suitable for a machine tool with small installation space and large clamping range.
In the embodiment, as shown in fig. 1, the housing 1 of the present invention is composed of a main housing 11 and a cover plate 12 covering and matching with the main housing 11, the main housing 11 is formed with an assembly cavity 1a for mounting components such as an oil cylinder 2, and the like, the center of the front end surface of the main housing 11 is provided with a guide sliding opening, so that the front end of the center arm 21 can penetrate through the assembly cavity 1a of the main housing 11, and the guide sliding opening has a guiding function, so as to provide a guide for the front and back sliding of the center arm 21 and ensure the running stability of the center arm 21. The safety valve 5 is fixed on the rear end face of the main shell 11, a rear notch 1b is formed in the center of the rear end face of the main shell 11, and the rear notch 1b can facilitate a piston rod of the cylinder body 2 to penetrate through to be connected with the safety valve 5. In the invention, a right supporting lug 13 protruding forwards is respectively formed at the upper end and the lower end of the guide sliding opening on the front end surface of the main shell 11, two left supporting lugs 14 are correspondingly formed on the cover plate 12, and supporting shaft holes are respectively formed on the left supporting lug 14 and the right supporting lug 13.
As shown in FIG. 5, the arm 3 of the present invention is S-shaped, a rotation shaft L as a fulcrum of the lever is rotatably inserted into the middle position of the arm 3, the right end of the rotation shaft L is positioned and installed in the supporting shaft hole of the right supporting ear 13 of the main housing 11, the left end of the rotation shaft L is positioned and installed in the supporting shaft hole of the left supporting ear 14 of the cover 12, and the arm 3 is installed on the housing 1 by the supporting shaft hole and the supporting of the rotation shaft L in a matching lever type. After the arm 3 is assembled, the rear section of the arm 3 is located in the assembly cavity 1a of the main housing 11, and the front section of the arm 3 is located outside the main housing 11.
In the embodiment shown in fig. 6, the roller assembly 6 of the present invention is assembled by a roller base 61, a roller shaft 62 and a roller 63; the roller 63 is rotatably sleeved on the roller shaft 62 and can prevent axial movement, and the roller 63 is in rolling, pressing and contact with the convex arc rolling surface 3a at the rear section of the support arm 3. The roller shaft 62 is positioned and supported on the roller seat 61, and the roller seat 61 is fixed at the rear end of the central arm 21 by welding.
In the embodiment, as shown in fig. 7, the regression plate 7 of the present invention is a triangular steel plate with a circular arc apex, and the regression plate 7 is respectively provided with a hinge hole 7a, a first slide 7b and a first pin hole 7 c. The hinge hole 7a is used for rotatably sleeving the return plate 7 at the left end of the roller shaft 62, so that the central arm 21 can drive the return plate 7 to move when moving. The first slide way 7b is a strip-shaped slide hole, and the first pin hole 7c is used for inserting and mounting the first pin shaft Z1. As can be seen from fig. 5 of the present invention, the left end surface of the rear section of the support arm 3 is provided with a curved second slideway 31 and a second pin hole 32, and the second pin hole 32 is used for inserting and installing a second pin shaft Z2. The first pin shaft Z1 and the second pin shaft Z2 are cylinders with the same diameter and length, and the width of the first slide way 7b and the width of the second slide way 31 are the same and are slightly larger than the diameter of the pin shafts. After assembly, the first pin Z1 on the return plate 7 is inserted into the second slide way 31 on the support arm 3 and can slide along the second slide way 31, and the second pin Z2 on the support arm 3 is inserted into the first slide way 7b on the return plate 7 and can slide along the first slide way 7 b. Thus, when the central arm 21 moves forwards, the return plate 7 can move to a dead point through the sliding motion of the pin and the slideway, and when the central arm 21 moves backwards, the return plate 7 can pull the support arm 3 to reset and open through the matching of the pin and the rear end of the slideway.
In an embodiment, the support wheel set 4 of the present invention comprises a support wheel shaft and a support wheel 41 rotatably sleeved on the support wheel shaft for rolling contact engagement with a workpiece. The support hub is a cylindrical shaft, not shown in the figures of the present invention. The front end angle of the support arm 3 is adjustably provided with an iron chip protection fan housing 8, and the support wheel set 4 arranged on the support arm 3 is positioned and installed in the iron chip protection fan housing 8. The angle of the iron scrap protective air cover 8 can be properly adjusted so as to enable the supporting wheel 41 to be abutted against the workpiece. The front end surface of the central arm 21 is formed with a concave slot cavity, the depth of the slot cavity is less than the diameter of the supporting wheel 41, and the supporting wheel set 4 arranged on the central arm 21 is positioned and installed in the slot cavity formed on the central arm 21.
In order to facilitate the positioning and installation of the supporting wheel set 4, positioning grooves are formed in the iron scrap protective fan housing 8 and the groove cavity of the central arm 21, and the positioning grooves are used for enabling the shaft ends of the supporting wheel shafts to be clamped into the positioning grooves so as to provide support for the supporting wheel shafts. The iron chip protective wind cover 8 is provided with a locking block 81 for pressing and fixing the supporting wheel shaft, and the central arm 21 is provided with a pressing plate 9 for pressing and fixing the supporting wheel shaft. The invention can prevent the supporting wheel set 4 from falling off from the iron scrap protective air cover 8 through the locking block 81, and the pressure plate 9 can prevent the supporting wheel set 4 from falling off from the central arm 21.
In the embodiment of the invention, the iron chip protection fan housing 8 is provided with a connecting hole 8a for connecting a water curtain system, and the opening of the iron chip protection fan housing 8 is provided with a spray hole 8 b.
The invention can automatically adjust the center position of the workpiece according to the conditions of excircle of the workpiece or axial swing of a rotating shaft and the like in the rotating process of the workpiece, prevent additional deformation and oscillation of the whole system caused by additional deformation caused by interaction between internal forces caused by rigid support, and ensure constant support force, thereby ensuring more stable support.
The working principle of the invention is as follows: under the action of hydraulic pressure, the central arm 21 is forced by the oil cylinder 2 to drive the two roller sets 6 to move back and forth, so that the central arm 21 simultaneously drives the upper and lower support arms 3 to move synchronously, and a workpiece is always controlled in a circle formed by the support points of the three support wheels 41.
When the centre frame does not work, the centre frame is in a state of not contacting with the workpiece (as the case may be), the oil cylinder 2 is in an oil discharge state, and the two support arms 3 are controlled in a retraction state by the return plate 7. When the centre frame is required to work (the workpiece is clamped on the machine tool), the oil cylinder 2 is filled into the rodless cavity of the oil cylinder 2 by a hydraulic system, and the centre arm 21 extends out to enable the supporting wheel 41 of the centre frame to move to the part of the workpiece to be supported. The upper and lower support arms 3 support the shaft workpiece to be processed, and the middle central arm supports the workpiece to prevent the workpiece from moving transversely. When the process is carried out, as the diameter of the workpiece is continuously reduced, the angle between the support wheel sets 4 of the two support arms 3 is reduced, and the support wheel set 4 of the central arm moves forwards to always support the workpiece.
While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by one skilled in the art without departing from the scope of the invention.
Claims (8)
1. A self-centering lathe center frame comprises a housing (1) with a corner-wiping flat cuboid structure, a center arm (21) which is arranged at the center position in the housing (1) in a front-back sliding manner, and two support arms (3) which are hinged on the housing (1) in a lever manner; the front ends of the central arm (21) and the two support arms (3) are respectively provided with a support wheel set (4) which is used for rolling, supporting and matching with a processing workpiece; the method is characterized in that: the central arm (21) is a cylinder body of an oil cylinder (2) which is hidden in the shell (1), the end of a piston rod of the oil cylinder (2) is provided with a manual-automatic integrated safety valve (5), and the safety valve (5) is fixedly arranged on the rear end surface of the shell (1) through a connecting bolt (T) and also serves as a fixed fulcrum of the oil cylinder (1); the two support arms (3) are arranged in an up-and-down symmetrical mode by taking the axial lead of the central arm (21) as a symmetrical axis, roller groups (6) which are used for applying torque to the support arms (3) on the corresponding sides in a rolling mode when the central arm (21) extends forwards are symmetrically arranged on the upper side face and the lower side face of the central arm (21), and convex arc-shaped rolling surfaces (3a) matched with the roller groups (6) in a rolling contact mode are formed in the rear section of each support arm (3); the central arm (21) advances under the action of hydraulic pressure, simultaneously pushes the two support arms (3) to synchronously move and fold through the rolling force application of the roller group (6) so as to control a workpiece in a circle formed by the support points of the three support wheel groups (4), and the central arm (21) is hinged with a return plate (7) which is used for driving the support arms (3) to open and reset when the central arm (21) retreats.
2. The self-centering lathe center rest of claim 1, wherein: the shell (1) consists of a main shell (11) formed with an assembly cavity (1a) and a cover plate (12) matched with the main shell (11) in a covering manner; the safety valve (5) fix on the rear end face of the main casing body (11), the rear end face of the main casing body (11) is opened and is had the back breach (1b) that enable the piston rod to pass in order to connect safety valve (5), the preceding terminal surface shaping of the main casing body (11) have and be used for providing the direction gliding slide opening of guide effect for the front and back slip of central arm (21), and the preceding terminal surface of the main casing body (11) is located the upper end and the lower extreme of direction gliding slide opening and respectively is shaped and has a right branch of jutting forward ear (13), apron (12) on correspondingly the shaping have two left branch to prop ear (14), left branch prop ear (14) and right branch and prop the ear (13) on all open and to have the support shaft hole.
3. The self-centering lathe center rest of claim 2, wherein: the support arm (3) is of an S-shaped structure, a rotating shaft (L) serving as a lever fulcrum is rotatably arranged in the middle section of the support arm (3) in a penetrating manner, the right end of the rotating shaft (L) is positioned and installed in a supporting shaft hole of a right supporting lug (13) of the main shell (11), and the left end of the rotating shaft (L) is positioned and installed in a supporting shaft hole of a left supporting lug (14) of the cover plate (12); the rear section of the support arm (3) is positioned in the assembly cavity (1a) of the main shell (11), and the front section of the support arm (3) is positioned outside the main shell (11).
4. The self-centering lathe center rest of claim 3, wherein: the roller group (6) consists of a roller seat (61), a roller shaft (62) and a roller (63); the roller (63) is rotationally sleeved on the roller shaft (62), and the roller (63) is in rolling and pressing contact with the convex arc rolling surface (3a) at the rear section of the support arm (3); the roller shaft (62) is positioned and supported on the roller seat (61), and the roller seat (61) is welded and fixed at the rear end of the central arm (21).
5. The self-centering lathe center rest of claim 4, wherein: the return plate (7) is a triangular steel plate with an arc vertex angle, a hinge hole (7a) which is rotatably sleeved at the left end of the roller shaft (62) is formed in the return plate (7), a first strip-shaped slide way (7b) and a first pin hole (7c) are further formed in the return plate (7), and a first pin shaft (Z1) is fixedly installed in the first pin hole (7 c); a second bent slide way (31) and a second bent pin hole (32) are formed in the left end face of the rear section of the support arm (3), and a second pin shaft (Z2) is fixedly mounted in the second pin hole (32); the first pin shaft (Z1) on the return plate (7) is in sliding fit with the second slide way (31) on the support arm (3), and the second pin shaft (Z2) on the support arm (3) is in sliding fit with the first slide way (7b) on the return plate (7).
6. The self-centering lathe center rest of claim 5, wherein: the supporting wheel set (4) comprises a supporting wheel shaft and a supporting wheel (41) which is rotatably sleeved on the supporting wheel shaft and is used for being in rolling contact with and matched with a workpiece; the front end angle of the support arm (3) is adjustably provided with an iron scrap protection fan housing (8), and a support wheel set (4) arranged on the support arm (3) is positioned and arranged in the iron scrap protection fan housing (8); the front end surface of the central arm (21) is formed with a concave slot cavity, and the support wheel set (4) arranged on the central arm (21) is positioned and installed in the slot cavity formed by the central arm (21).
7. The self-centering lathe center rest of claim 6, wherein: the iron chip protection wind cover (8) and the groove cavity of the central arm (21) are both formed with positioning grooves for positioning and supporting the supporting wheel shaft, the iron chip protection wind cover (8) is provided with a locking block (81) for pressing the fixed supporting wheel shaft, and the central arm (21) is provided with a pressing plate (9) for pressing the fixed supporting wheel shaft.
8. The self-centering lathe center rest of claim 7, wherein: the scrap iron protection fan cover (8) is provided with a connecting hole (8a) for connecting a water curtain system, and a cover opening of the scrap iron protection fan cover (8) is provided with a spray hole (8 b); the safety valve (5) is provided with an oil inlet (5a) and an oil outlet (5 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493418.2A CN112338574A (en) | 2020-12-17 | 2020-12-17 | Self-centering lathe center frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011493418.2A CN112338574A (en) | 2020-12-17 | 2020-12-17 | Self-centering lathe center frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112338574A true CN112338574A (en) | 2021-02-09 |
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ID=74427460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011493418.2A Pending CN112338574A (en) | 2020-12-17 | 2020-12-17 | Self-centering lathe center frame |
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| CN (1) | CN112338574A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369918A (en) * | 2021-07-06 | 2021-09-10 | 章敬远 | Self-aligning support frame of common lathe |
-
2020
- 2020-12-17 CN CN202011493418.2A patent/CN112338574A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369918A (en) * | 2021-07-06 | 2021-09-10 | 章敬远 | Self-aligning support frame of common lathe |
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