CN218575014U

CN218575014U - Clamping device of machine tool

Info

Publication number: CN218575014U
Application number: CN202123149792.3U
Authority: CN
Inventors: 杨文明; 钱力
Original assignee: Shanghai Keyontechs Co Ltd
Current assignee: Shanghai Keyontechs Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-03-07
Anticipated expiration: 2031-12-15

Abstract

The utility model belongs to the technical field of anchor clamps, a clamping device of lathe is disclosed. The clamping device of the machine tool is used for clamping a workpiece, the workpiece comprises a clamped part and a supported part, the clamped part is arranged on the periphery of the supported part, the clamped part protrudes out of the supported part along the axial direction of the workpiece, and the clamping device of the machine tool comprises a chuck and a clamping jaw; the jack catch is used for the centre gripping work piece, and the jack catch is provided with a plurality ofly, and a plurality of jack catches set up along the circumference interval of chuck, and the jack catch includes draw-in groove and holding surface, and the draw-in groove can the joint have different length along the axis direction of chuck and/or along the radial direction of chuck by the clamping part, and the holding surface sets up between the axis of draw-in groove and chuck for support by the supporting part. The utility model provides a clamping device of lathe can be in the centre gripping work piece during the turning, to the work piece by the supporting part play the supporting role, and be applicable to the processing of the work piece of different specifications.

Description

Clamping device of machine tool

Technical Field

The utility model relates to an anchor clamps technical field especially relates to a clamping device of lathe.

Background

The machine tool can process a workpiece by cutting and the like, and is generally provided with a chuck and a clamping jaw, and the clamping jaw is used for clamping the workpiece.

The differential pressure type flowmeter is used for measuring flow in a closed pipeline, and is wide in application and various in structure. One of the flange ring sealing surfaces applied to the high-pressure working condition is formed by clamping a throttling piece by two flanges. To maintain the strength of the orifice, the orifice is typically designed as one piece with an octagonal seal.

In actual processing production, when a workpiece which is easy to deform during clamping, such as the throttling element, is clamped by a clamping jaw of a common machine tool for processing, the common clamping jaw can only clamp the outer surface of the workpiece, so that the middle part of the workpiece is in a suspended state, the workpiece is easy to deform during turning, and the processing precision of the workpiece is influenced. In the prior art, a clamp capable of supporting the middle part of a workpiece while clamping the workpiece can only process the workpiece of one specification, and when processing workpieces of other specifications, the clamp needs to be replaced, so that the universality is poor, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a clamping device of lathe can be in the centre gripping work piece during the turning, to the work piece by the supporting part play the supporting role, and be applicable to the processing of the work piece of different specifications.

To achieve the purpose, the utility model adopts the following technical proposal:

a clamping device of a machine tool for clamping a workpiece, the workpiece including a clamped portion and a supported portion, the clamped portion being provided at an outer periphery of the supported portion, and the clamped portion being provided to protrude from the supported portion in an axial direction of the workpiece, the clamping device of the machine tool comprising:

a chuck;

the jack catch, the jack catch is used for the centre gripping work piece, the jack catch is provided with a plurality ofly, and is a plurality of the jack catch is followed the circumference interval of chuck sets up, the jack catch includes draw-in groove and holding surface, the draw-in groove can the joint be followed the axis direction of chuck and/or follow the chuck radial direction has different length by the clamping part, the holding surface set up in the draw-in groove with between the axis of chuck, be used for supporting by the supporting part.

Optionally, the clamping groove has a plurality of lengths in the chuck axial direction and/or in the radial direction of the chuck, for clamping clamped portions having different lengths in the chuck axial direction and/or in the radial direction of the chuck.

Optionally, a side of the supported portion abutting against the supporting surface is a supported surface, and a distance between the supported surface and an end of the clamped portion on the side close to the supported surface is smaller than or equal to a distance that the engaging groove extends from a surface of the claw away from the chuck in the direction of the chuck along the axis of the chuck.

Optionally, the jaws are made of 45 gauge steel.

Optionally, the support surface is provided with a copper pad.

Optionally, the clamping device of the machine tool further includes a base jaw, the base jaw is slidably connected to the chuck, and the clamping jaw is fixed to the base jaw and can move with the base jaw.

Optionally, a rotating part is arranged in the chuck, a planar thread groove spirally and gradually extending outwards from the center is arranged on one of the surface of the rotating part close to one side of the base jaw and the surface of the base jaw close to one side of the chuck, a planar thread matched with the planar thread groove is arranged on the other surface, and the planar thread is meshed in the planar thread groove, so that the rotation of the rotating part is converted into the radial sliding of the chuck along the base jaw.

Optionally, one side of the base jaw, which is far away from the chuck, is provided with a positioning block, one side of the jaw, which is close to the chuck, is provided with a positioning groove, and the positioning block is matched with the positioning groove so as to position the jaw relative to the base jaw.

Optionally, a limiting groove is formed in the chuck, the base jaw is arranged in the limiting groove, and the base jaw can move in the limiting groove.

Optionally, a countersunk hole is formed in the supporting surface, a threaded hole is formed in the base jaw, and a bolt penetrates through the countersunk hole and is screwed with the threaded hole.

Has the beneficial effects that:

the utility model provides a clamping device of a machine tool, which is used for clamping a workpiece, wherein the clamped part at the periphery of the workpiece protrudes out of a supported part along the axis direction of the workpiece, a plurality of clamping jaws are arranged at intervals along the circumferential direction of a chuck, and the workpiece is uniformly stressed when the workpiece is clamped; the clamping grooves are formed in the clamping jaws, so that workpieces with clamped parts of different lengths in the axial direction of the chuck and/or in the radial direction of the chuck can be clamped; the supported part of the workpiece is supported by the supporting surface, so that the deformation of the workpiece during machining caused by the suspension of the supported part of the workpiece is avoided. The clamping device of the machine tool is simple in structure and convenient to use, and can be used for clamping a workpiece and supporting a supported part of the workpiece during turning, so that the machining precision is improved; and the universality is good, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic view of a workpiece and a jaw assembly according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic view of the structure of section A-A in FIG. 1;

fig. 3 is a front view of a jaw provided by an embodiment of the present invention;

fig. 4 is a cross-sectional view of a jaw provided by an embodiment of the present invention.

In the figure:

1. a chuck;

2. a claw; 21. a card slot; 22. a support surface; 23. positioning a groove;

3. a workpiece; 31. a supported portion; 32. a clamped portion;

4. a bolt; 5. a base jaw.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a clamping device of lathe for the centre gripping work piece 3, work piece 3 includes by clamping part 32 and supported part 31, by clamping part 32 set up in by the periphery of supported part 31, and by clamping part 32 along the axis direction protrusion of work piece 3 by the setting of supported part 31, as shown in fig. 1-4, clamping device of lathe includes chuck 1 and jack catch 2; the clamping jaw 2 is used for clamping a workpiece 3, the clamping jaw 2 is provided with a plurality of clamping jaws 2, the plurality of clamping jaws 2 are arranged along the circumferential direction of the chuck 1 at intervals, each clamping jaw 2 comprises a clamping groove 21 and a supporting surface 22, the clamping grooves 21 can be clamped with clamped parts 32 which are clamped along the axial direction of the chuck 1 and/or have different lengths along the radial direction of the chuck 1, and the supporting surfaces 22 are arranged between the clamping grooves 21 and the axial line of the chuck 1 and used for supporting the supported parts 31.

The clamping device of the machine tool is used for clamping a workpiece 3, the chuck 1 is connected with the machine tool body, and the chuck 1 can rotate by taking the axis of the chuck 1 as a center. The circumference of chuck 1 is provided with a plurality of jack catchs 2 at the interval, and a plurality of jack catchs 2 combined action can realize fixed to the centre gripping of work piece 3. The clamped part 32 is arranged on the periphery of the supported part 31, the clamped part 32 protrudes out of the supported part 31 along the axial direction of the workpiece 3, and the clamping of the clamped part 32 by the plurality of clamping jaws 2 is arranged at intervals in the circumferential direction of the chuck 1, so that the stress is more uniform when the workpiece 3 is clamped.

The catching grooves 21 are located on the side of the jaws 2 remote from the chuck 1. The axis of the chuck 1 is used as the center, one side surface of the clamping groove 21, which is far away from the axis of the chuck 1, is used for abutting against the end surface of the clamped part 32, and different clamping jaws 2 realize multi-point abutting against the clamped part 32, so that the position of the workpiece 3 is fixed. The clamping groove 21 can be used for clamping clamped parts 32 with different lengths along the axial direction of the chuck 1 and/or along the radial direction of the chuck 1, so that the clamping device of the machine tool has stronger applicability. The support surface 22 is located on the side of the jaws 2 remote from the chuck 1 in the axial direction of the chuck 1. The support surface 22 is located radially between the pockets 21 and the axis of the chuck 1, along the chuck 1. After the workpiece 3 is fixed using the clamping device of the machine tool, the support surface 22 abuts against the supported portion 31, thereby providing a support force to the workpiece 3.

Optionally, the clamping device of the machine tool further comprises a base jaw 5, the base jaw 5 is connected with the chuck 1 in a sliding mode, and the clamping jaws 2 are fixed on the base jaw 5 and can move along with the base jaw 5.

The base jaw 5 can realize radial movement relative to the chuck 1, and drives the jaw 2 to move along the radial direction of the chuck 1, so as to clamp and loosen the workpiece 3.

Optionally, a rotating member is arranged in the chuck 1, a planar thread groove spirally and gradually opened and extended from the center to the outside is arranged on one of the surface of the rotating member close to the base jaw 5 and the surface of the base jaw 5 close to the chuck 1, a planar thread matched with the planar thread groove is arranged on the other surface, and the planar thread is engaged in the planar thread groove, so that the rotation of the rotating member is converted into the radial sliding of the base jaw 5 along the chuck 1.

The rotary member is provided inside the chuck 1, and controls the movement of the base jaw 5 by rotation. The rotor rotates out of synchronism with the chuck 1. The base jaw 5 and a rotating piece in the chuck 1 are matched with each other through a plane thread and a plane thread groove to realize the radial sliding of the base jaw 5 along the chuck 1. The base jaws 5 are provided in plural, and the flat threads or flat thread grooves provided on the rotary member are centered on the axis of the chuck 1, so that the radial sliding distances of the different base jaws 5 are the same. Preferably, a flat thread or a flat thread groove may be provided on a side surface of the rotary member adjacent to the base jaw 5. The base claws 5 correspond to the clamping claws 2 one by one, and when the rotating piece rotates, the plurality of base claws 5 move towards the direction close to or far away from the axis of the chuck 1 at equal intervals under the matching of the plane threads and the plane thread grooves, so that the clamping claws 2 clamp or loosen the workpiece 3.

Optionally, a limiting groove is formed in the chuck 1, the base jaw 5 is arranged in the limiting groove, and the base jaw 5 can move in the limiting groove.

The spacing groove sets up in chuck 1 and is close to one side of base claw 5, provides direction and limiting displacement for base claw 5 slides along chuck 1's radial.

Optionally, one side of the base jaw 5, which is away from the chuck 1, is provided with a positioning block, one side of the jaw 2, which is close to the chuck 1, is provided with a positioning groove 23, and the positioning block is matched with the positioning groove 23 to position the jaw 2 relative to the base jaw 5.

Through the cooperation of positioning groove 23 and the locating piece, realize jack catch 2 and base jaw 5 location, make the two convenient for confirm relative position when the installation.

Preferably, the jaw 2 is fixed to the base jaw 5 by means of a bolt 4. The clamping jaw 2 and the base jaw 5 are relatively fixed, so that the clamping jaw 2 can slide along the base jaw 5 along the radial direction of the chuck 1, and further the workpiece 3 can be clamped and loosened. The bolt 4 is fixed in position on the support surface 22 of the jaw 2. Preferably, the number of bolts 4 is two.

Optionally, a countersunk hole is formed in the supporting surface 22, a threaded hole is formed in the base jaw 5, and the bolt 4 passes through the countersunk hole and is in threaded connection with the threaded hole.

The bolt 4 is installed in a counter bore mode, so that the head of the bolt 4 is sunk into the claw 2, the supporting surface 22 is kept flat, and the situation that the bolt 4 protrudes out of the surface of the supporting surface 22 to damage the surface of the supported part 31 of the workpiece 3 and influence the use is avoided. Preferably, bolt 4 chooses for use hexagon socket head cap screw, and the fastening of being convenient for has reduced the dismantlement degree of difficulty.

With continued reference to fig. 1-4, the clamping grooves 21 optionally have a plurality of lengths in the axial direction of the chuck 1 and/or in the radial direction of the chuck 1 for clamping clamped portions 32 having different lengths in the axial direction of the chuck 1 and/or in the radial direction of the chuck 1.

When the clamped part 32 is longer along the axial direction of the chuck 1, the clamped part can be matched with the longer part of the clamping groove 21 along the axial direction of the chuck 1; when the held portion 32 is short in the axial direction of the chuck 1 and long in the radial direction of the chuck 1, it can be engaged with the short portion of the card slot 21 in the axial direction of the chuck 1. The clamping groove 21 is provided with a plurality of lengths along the axial direction of the chuck 1 and/or along the radial direction of the chuck 1, and is suitable for clamped parts 32 with different lengths along the axial direction of the chuck 1 and/or along the radial direction of the chuck 1, so that the applicability of the clamping groove 21 is improved. Because the draw-in groove 21 adopts the mode of setting of different length along 1 axial direction of chuck, compare in setting up a mode of setting up the equal great groove of edge 1 axial direction of chuck and radial direction length, effectively alleviated the problem that 2 intensity of jack catch reduce owing to set up draw-in groove 21 and bring.

Alternatively, the side of the supported portion 31 abutting against the supporting surface 22 is a supported surface, and the distance between the supported surface and the end of the clamped portion 32 on the side close to the supported surface in the axial direction of the chuck 1 is smaller than or equal to the distance that the engaging groove 21 extends from the surface of the jaw 2 away from the chuck 1 in the direction of the chuck 1.

Because the distance between the supported surface and the end part of the clamped part 32 close to the supported surface is less than or equal to the distance between the clamping grooves 21 and the chuck 1 from the surface of the clamping jaws 2 far away from the chuck 1 along the axial direction of the chuck 1, when clamping the workpiece 3, the supported surface can contact the clamping jaws 2 before the clamped part 32 is close to the clamping jaws 2 along the axial direction of the chuck 1, thereby ensuring that the supported surface can contact the supporting surface 22. The situation that the distance between the clamped part 32 and the end part close to the supported surface is too long in the axial direction of the chuck 1, so that the end part of the clamped part 32 close to the clamping jaws 2 is firstly abutted against the clamping jaws 2, and the supported surface is not contacted with the supporting surface 22 and cannot play a supporting role is avoided.

Illustratively, the workpiece 3 is an integral machining of the throttle and the octagonal seal. The octagonal sealing gasket is sleeved on the outer circumference of the throttling element and protrudes out of the throttling element along the axial direction, the throttling element is supported by the supporting part 31, and the octagonal sealing gasket is clamped by the clamping part 32. Because the length of the octagonal sealing gasket along the axial direction of the chuck 1 is longer than that of the throttling element, the clamping groove 21 of the clamping device of the machine tool can clamp the workpiece 3, and the workpiece 3 is fixed.

Alternatively, the jaw 2 is made of 45 steel.

The claw 2 is made of No. 45 steel, so that the strength can be guaranteed, and meanwhile, the processing and the manufacturing are convenient. Meanwhile, the No. 45 steel is convenient to purchase and has low cost. Preferably, a modulated steel 45 is used.

Optionally, the surface of the support surface 22 is provided with a copper pad.

In actual operation, the positions of the jaws 2 relative to the chuck 1 are adjusted, so that the jaws 2 clamp the workpiece 3, and the jaws 2 and the workpiece 3 are respectively contacted with the supporting surface 22 on one side surface of the clamping groove 21 away from the axis of the chuck 1. Because the contact area between the supporting surface 22 and the workpiece 3 is large, in order to prevent the supporting surface 22 from damaging the surface of the supported part 31 of the workpiece 3, a copper pad is additionally arranged between the supporting surface 22 and the supported part 31 during assembly, and the surface of the supported part 31 is directly contacted through the copper pad.

The utility model provides a clamping device of lathe installation is simple, convenient to use, can be in fixed work piece 3 during the turning, to work piece 3 by supporting part 31 play the supporting role, prevent because the machining precision reduction problem that work piece 3 warp and cause, simultaneously applicable in the processing of different specification work pieces 3, the commonality is good.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. 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 claims of the present invention.

Claims

1. A clamping device of a machine tool for clamping a workpiece (3), the workpiece (3) including a clamped portion (32) and a supported portion (31), the clamped portion (32) being provided on an outer periphery of the supported portion (31), and the clamped portion (32) being provided to protrude from the supported portion (31) in an axial direction of the workpiece (3), characterized by comprising:

a chuck (1);

jack catch (2), jack catch (2) are used for the centre gripping work piece (3), jack catch (2) are provided with a plurality ofly, and are a plurality of jack catch (2) are followed the circumference interval of chuck (1) sets up, jack catch (2) include draw-in groove (21) and holding surface (22), draw-in groove (21) can the joint be followed the axis direction of chuck (1) and/or follow chuck (1) radial direction has different length by clamping part (32), holding surface (22) set up in draw-in groove (21) with between the axis of chuck (1), be used for supporting by supporting part (31).

2. Clamping device of a machine tool according to claim 1, characterized in that the clamping groove (21) has a plurality of lengths in the axial direction of the chuck (1) and/or in the radial direction of the chuck (1) for clamping clamped portions (32) having different lengths in the axial direction of the chuck (1) and/or in the radial direction of the chuck (1).

3. The clamping device of the machine tool according to claim 2, wherein a side of the supported portion (31) abutting against the supporting surface (22) is a supported surface, and a distance between the supported surface and an end of the clamped portion (32) on a side close to the supported surface in an axial direction of the chuck (1) is smaller than or equal to a distance of the clamping groove (21) extending from a surface of the jaw (2) away from the chuck (1) in a direction of the chuck (1).

4. Clamping device of a machine tool according to claim 1, characterized in that the jaws (2) are made of steel No. 45.

5. Clamping device for a machine tool according to claim 1, characterized in that the surface of the support surface (22) is provided with a copper pad.

6. Clamping device for a machine tool according to claim 1, characterized in that it further comprises a base jaw (5), said base jaw (5) being slidingly associated with said chuck (1), said jaws (2) being fixed to said base jaw (5) so as to be movable with said base jaw (5).

7. The clamping device of the machine tool according to claim 6, wherein a rotating member is provided in the chuck (1), and a surface of the rotating member on a side close to the base jaw (5) and a surface of the base jaw (5) on a side close to the chuck (1) are provided with a flat thread groove spirally and gradually opened from the center to the outside on one surface, and a flat thread matching with the flat thread groove is provided on the other surface, and the flat thread is engaged in the flat thread groove, so that the rotation of the rotating member is converted into the sliding of the base jaw (5) in the radial direction of the chuck (1).

8. Clamping device for a machine tool according to claim 7, characterized in that the side of the base jaw (5) remote from the chuck (1) is provided with a positioning block, and the side of the jaw (2) close to the chuck (1) is provided with a positioning slot (23), said positioning block cooperating with said positioning slot (23) to position the jaw (2) with respect to the base jaw (5).

9. Clamping device of a machine tool according to claim 7, characterized in that the chuck (1) is provided with a limit groove, the base jaw (5) is arranged in the limit groove, and the base jaw (5) is movable in the limit groove.

10. Clamping device for a machine tool according to claim 9, characterized in that said support surface (22) is provided with a counter bore and said base jaw (5) is provided with a threaded hole through which a bolt (4) is threaded.