CN221185627U

CN221185627U - Clamp and machine tool

Info

Publication number: CN221185627U
Application number: CN202323078872.3U
Authority: CN
Inventors: 王小勋; 邓少鹏; 罗天伦
Original assignee: Guangzhou Diesel Engine Factory Co ltd
Current assignee: Guangzhou Diesel Engine Factory Co ltd
Priority date: 2023-11-14
Filing date: 2023-11-14
Publication date: 2024-06-21
Anticipated expiration: 2033-11-14

Abstract

The application discloses a clamp and a machine tool, wherein the clamp comprises a base, a pressing and fixing assembly, an inner wall positioning piece and an end surface positioning piece, and a workpiece is arranged on the base; the pressing and fixing assembly is arranged on the base, and applies pressure towards the base to the workpiece so as to fix the workpiece on the base; the inner wall locating piece is arranged on the base and is used for abutting against and locating the inner wall of the workpiece; the end face positioning piece is arranged on the base and is used for abutting and positioning an end face to be processed of the workpiece; the end face positioning piece is detachable on the base or can be removed from the end face of the workpiece so as to avoid the milling cutter for processing the end face of the workpiece.

Description

Clamp and machine tool

Technical Field

The application relates to the technical field of machining, in particular to a clamp and a machine tool.

Background

The connecting rod of the diesel engine is used for connecting the crankshaft and the piston, and is an important part for realizing the operation of the diesel engine. The connecting rod is provided with an upper cover and a lower cover, the upper cover and the lower cover are assembled and arranged on the connecting rod through bolts, the upper cover and the lower cover of the connecting rod need to be milled on a machine tool by using a milling cutter to form a large end face, and the upper cover or the lower cover is usually fixed on the machine tool by using a clamp. However, the existing common clamps cannot accurately position the upper cover and the lower cover or shift positions during milling, so that the machining of the large end face cannot meet the precision required by the drawing. On the other hand, after the upper cover and the lower cover are fixed on the machine tool, when the milling cutter is used for machining, a region which cannot be machined by the milling cutter may exist on the large end face, and the milling of the whole large end face is affected.

Disclosure of utility model

In order to solve at least one of the technical problems, the application provides a clamp and a machine tool, and the adopted technical scheme is as follows.

The machine tool provided by the application is provided with a clamp.

The fixture provided by the application comprises a base, a pressing and fixing assembly, an inner wall positioning piece and an end surface positioning piece, wherein a workpiece is arranged on the base; the pressing and fixing assembly is arranged on the base, and applies pressure towards the base to the workpiece so as to fix the workpiece on the base; the inner wall locating piece is arranged on the base and is used for abutting against and locating the inner wall of the workpiece; the end face positioning piece is arranged on the base and is used for abutting and positioning an end face to be processed of the workpiece; the end face positioning piece is detachably arranged on the base or can be moved away from the end face of the workpiece so as to avoid a milling cutter for machining the end face of the workpiece.

In some embodiments of the application, the inner wall locating member is provided with an arcuate surface for abutting and locating the inner wall of the workpiece.

In some embodiments of the present application, the inner wall positioning member is configured as a positioning plate, two ends of the positioning plate are respectively provided with the cambered surfaces, and the cambered surfaces at two ends of the positioning plate are in the same circumferential track.

In some embodiments of the present application, the end surface positioning member is provided with a first chute, the end surface positioning member is provided on the base by a locking member penetrating through the first chute, and the end surface positioning member is removable from the end surface of the workpiece with the first chute as a guide.

In some embodiments of the present application, the pressing assembly includes a pressing plate, a push rod, a pull rod and a locking nut, where the push rod and the pull rod are both disposed on the base, the top of the push rod abuts against a lower side surface of one end of the pressing plate, the pull rod penetrates through the pressing plate, the locking nut is in threaded connection with the pull rod, the locking nut presses an upper side surface of the pressing plate, and a lower side surface of the other end of the pressing plate is used for pressing the workpiece.

In some embodiments of the present application, the pressing plate is provided with a second sliding groove, the pull rod penetrates through the second sliding groove, and the pressing plate uses the second sliding groove as a guide to enable the pressing plate to move.

In some embodiments of the application, the clamp comprises a clamping assembly disposed on the base for clamping the workpiece.

In some embodiments of the present application, the clamping assembly includes a mounting base and a set screw, the mounting base is disposed on the base, the set screw is in threaded connection with the mounting base, and one end of the set screw is used for abutting against an outer sidewall of the workpiece.

In some embodiments of the application, the fixture comprises a backing plate, the backing plate is arranged on the base, the inner wall positioning piece is arranged on the upper side surface of the backing plate, and the workpiece is arranged on the upper side surface of the backing plate.

The embodiment of the application has at least the following beneficial effects: the clamp has the advantages that the pressing assembly is used for pressing the outer side of the workpiece to fix the workpiece, the inner wall positioning piece is abutted against the inner side wall of the workpiece, the workpiece is transversely positioned on one hand, and the inner wall positioning piece and the pressing assembly are matched to further prevent the workpiece from being shifted in position during milling; the fixture utilizes the end face positioning piece to determine the position of the end face to be machined of the workpiece, and after the workpiece is fixed, the end face positioning piece is detached or moved away to avoid the milling cutter, so that the milling cutter can machine the whole end face of the workpiece. The application can be widely applied to the field of machining.

Drawings

The described and/or additional aspects and advantages of embodiments of the present application will become apparent and readily appreciated from the following description taken in conjunction with the accompanying drawings. It should be noted that the embodiments shown in the drawings below are exemplary only and are not to be construed as limiting the application.

Fig. 1 is a block diagram of the front face of the jig.

Fig. 2 is a structural view of the clip in plan view.

Fig. 3 is a side view of the clamp.

Reference numerals: 100. a base; 200. a press-fixing assembly; 210. a pressing plate; 211. a second chute; 220. a push rod; 231. a pull rod; 232. a lock nut; 310. an inner wall positioning member; 311. a backing plate; 320. an end face positioning member; 321. a first chute; 400. a clamping assembly; 410. a mounting base; 420. and (5) setting the screw.

Detailed Description

Embodiments of the present application are described in detail below in conjunction with fig. 1-3, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that, if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used as directions or positional relationships based on the directions shown in the drawings, the directions are merely for convenience of description and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application. Features defining "first", "second" are used to distinguish feature names from special meanings, and furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The application relates to a machine tool, which is provided with a clamp, wherein a workpiece clamped by the clamp is a connecting rod upper cover or a connecting rod lower cover, the clamp is used for fixing the workpiece to the machine tool, and a milling cutter of the machine tool is used for milling a large end face and a chamfer of the workpiece.

Other constructions and operations of the machine tool are well known to those skilled in the art and will not be described in detail herein, and the structure of the jig will be described in detail below.

The application relates to a clamp, which comprises a base 100 and a pressing and fixing assembly 200, wherein the base 100 is connected with a machine tool, the base 100 is positioned on a workbench of the machine tool through a positioning pin, the base 100 is provided with a lifting lug, the pressing and fixing assembly 200 is arranged on the base 100, a workpiece is arranged on the base 100, and the pressing and fixing assembly 200 applies pressure towards the base 100 to the workpiece so as to fix the workpiece on the base 100.

Referring to the drawings, the fixture includes an inner wall positioning member 310 and an end surface positioning member 320, the inner wall positioning member 310 is disposed on the base 100, and the end surface positioning member 320 is disposed on the base 100. Specifically, when the workpiece is placed in the fixture, the inner wall positioning member 310 is used for abutting and positioning the inner wall of the workpiece, the end face positioning members 3230 are at least two, the end face positioning members 320 are used for abutting and positioning the end face to be processed of the workpiece, and after the workpiece is positioned, the workpiece is fixed in position by the press fixing assembly 200.

Further, considering that the end face positioning member 320 is abutted against and positioned on the end face of the workpiece to be milled, the end face positioning member 320 is designed to be detachable on the base 100 or removable from the end face of the workpiece so as to avoid the milling cutter for machining the end face of the workpiece.

As one embodiment, the end surface positioning member 320 is provided with a first slide groove 321, the end surface positioning member 320 is provided to the base 100 by a locking member penetrating the first slide groove 321, and the end surface positioning member 320 is removable from the end surface of the workpiece with the first slide groove 321 as a guide.

Referring to the drawings, the end surface positioning member 320 is disposed on an end surface of one end of the base 100, one side wall of the end surface positioning member 320 is used for abutting against an end surface of a workpiece, further, the first chute 321 is disposed along a vertical direction, and after the workpiece is positioned and fixed, the end surface positioning member 320 can move downward to avoid the milling cutter. In some examples, first runner 321 is configured as a kidney-shaped aperture.

In some examples, the locking member is configured as a locking screw. It will be appreciated that, before the workpiece is placed on the fixture, the locking member is screwed on the base 100 to lock and fix the end surface positioning member 320, and after the workpiece is fixed, the locking member is unscrewed, so that the end surface positioning member 320 can move downward under the guidance of the first sliding groove 321.

As an embodiment, the inner wall positioning member 310 is provided with an arc surface, the workpiece is reversely buckled on the base 100, and the arc surface of the inner wall positioning member 310 is used for abutting and positioning the inner wall of the workpiece. Further, the arc of the arc surface is consistent with the arc of the inner wall of the workpiece, so that the arc surface of the inner wall positioning piece 310 can be attached to the inner wall of the workpiece, and the positioning accuracy is improved.

Referring to the drawings, the inner wall positioning member 310 is provided as a positioning plate, both ends of the positioning plate are respectively provided with an arc surface, and the arc surfaces of both ends of the positioning plate are in the same circumferential track.

In some examples, the fixture includes a pad 311, and in combination with the drawings, the pad 311 is disposed on the base 100, the inner wall positioning member 310 is disposed on an upper side of the pad 311, and the workpiece is disposed on an upper side of the pad 311.

In some examples, the inner wall positioning member 310 may be removable from the base 100 to allow for replacement of a different inner wall positioning member 310 to accommodate a different workpiece. Specifically, in the case where the pad 311 is provided on the base 100, the inner wall positioning member 310 is mounted on the pad 311 by a locking screw or a cylindrical pin.

In one embodiment, on the base 100, the end face where the end face positioning member 320 is located is taken as the front end face of the base 100, and after the inner wall positioning member 310 is disposed on the base 100, the front end face of the inner wall positioning member 310 is aligned with the front end face on the base 100 as a reference face.

Further, when the jig is set in the machine tool, the jig is aligned in the machine tool with the front end surface of the inner wall positioning member 310 as a reference.

As one embodiment, the press assembly 200 includes a platen 210, with the underside of the platen 210 being configured to press against a workpiece. It can be understood that the pressing assemblies 200 are respectively arranged at opposite positions on the outer sides of the workpieces, and the pressing plates 210 in the pressing assemblies 200 at opposite positions respectively press the outer sides of the workpieces, so that the workpieces are uniformly stressed, and the stability is improved.

Referring to the drawings, the pressing assembly 200 includes a push rod 220, a pull rod 231 and a locking nut, the push rod 220 is disposed on the base 100, the lower end of the push rod 220 is in threaded connection with the base 100, a corresponding threaded hole is disposed on the upper side of the base 100, the top of the push rod 220 abuts against the lower side of one end of the pressing plate 210, the pull rod 231 is disposed on the base 100, the lower end of the pull rod 231 is in threaded connection with the base 100, and a corresponding threaded hole is disposed on the upper side of the base 100. Further, the pull rod 231 penetrates through the pressing plate 210, the lock nut is arranged at the upper end of the pull rod 231, the lock nut is in threaded connection with the pull rod 231 and presses the upper side face of the pressing plate 210, and the lower side face of the other end of the pressing plate 210 is used for pressing a workpiece.

It will be appreciated that the pull rod 231 is located between the push rod 220 and one end of the pressing plate 210 for pressing the workpiece, and when the lock nut is screwed, the lock nut applies pressure to the pressing plate 210, and one end of the pressing plate 210 uses the top of the push rod 220 as a fulcrum, so that the other end of the pressing plate 210 presses the workpiece.

Further, the lock nut is provided as a shoulder nut to increase the area of the lock nut contacting the pressing plate 210. Or alternatively designed as: the pull rod 231 is sleeved with a washer, and the washer is positioned between the lock nut and the pressing plate 210.

In some examples, the platen 210 is provided with a second slide slot 211, the tie bar 231 penetrates the second slide slot 211, and the platen 210 is guided in a movable position by the second slide slot 211, specifically, the platen 210 is movable laterally to adapt to workpieces of different sizes. In some examples, the second runner 211 is provided as a kidney-shaped aperture.

As one embodiment, the fixture includes a clamping assembly 400, the clamping assembly 400 being disposed on the base 100, the clamping assembly 400 being configured to clamp a workpiece. It will be appreciated that the clamping assemblies 400 are respectively disposed at opposite positions on the outer side of the workpiece, so that both sides of the workpiece can be clamped under stress and the stress is uniform.

Referring to the drawings, the clamping assembly 400 includes a mounting seat 410 and a set screw 420, the mounting seat 410 is disposed on the base 100, the mounting seat 410 is fixed on the upper side surface of the base 100 by a screw, the mounting seat 410 is in an L-shaped structure, the set screw 420 is in threaded connection with the mounting seat 410, and one end of the set screw 420 is used for abutting against the outer side wall of a workpiece. It will be appreciated that by turning set screw 420, set screw 420 may be fed toward the workpiece such that set screw 420 abuts the outer sidewall of the workpiece.

In the description of the present specification, if a description appears that makes reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.

In the description of the present application, the terms "and" if used in the singular are intended to mean "and" as opposed to "or". For example, the patent name "a A, B" describes that what is claimed in the present application is: a technical scheme with a subject name A and a technical scheme with a subject name B.

Claims

1. A fixture, characterized in that: comprising

A base (100) on which a workpiece is disposed;

A press-fixing assembly (200), wherein the press-fixing assembly (200) is arranged on the base (100), and the press-fixing assembly (200) applies pressure to the workpiece towards the base (100) so as to fix the workpiece on the base (100);

an inner wall positioning piece (310), wherein the inner wall positioning piece (310) is arranged on the base (100), and the inner wall positioning piece (310) is used for abutting and positioning the inner wall of the workpiece;

The end face positioning piece (320), the end face positioning piece (320) is arranged on the base (100), and the end face positioning piece (320) is used for abutting and positioning an end face to be processed of the workpiece;

Wherein the end face positioning member (320) is detachable or removable from the end face of the workpiece on the base (100) to avoid a milling cutter for machining the end face of the workpiece.

2. A clamp as claimed in claim 1, wherein: the inner wall locating piece (310) is provided with an arc surface, and the arc surface is used for abutting and locating the inner wall of the workpiece.

3. A clamp as claimed in claim 2, wherein: the inner wall locating piece (310) is arranged as a locating plate, the cambered surfaces are respectively arranged at the two ends of the locating plate, and the cambered surfaces at the two ends of the locating plate are positioned on the same circumferential track.

4. A clamp according to any one of claims 1 to 3, wherein: the end face positioning piece (320) is provided with a first sliding groove (321), the end face positioning piece (320) is arranged on the base (100) through a locking piece penetrating through the first sliding groove (321), and the end face positioning piece (320) can be moved away from the end face of the workpiece by taking the first sliding groove (321) as a guide.

5. A clamp as claimed in claim 1, wherein: the pressing assembly (200) comprises a pressing plate (210), a push rod (220), a pull rod (231) and a locking nut (232), wherein the push rod (220) and the pull rod (231) are both arranged on the base (100), the top of the push rod (220) is abutted to the lower side face of one end of the pressing plate (210), the pull rod (231) penetrates through the pressing plate (210), the locking nut (232) is in threaded connection with the pull rod (231) and the locking nut (232) tightly presses the upper side face of the pressing plate (210), and the lower side face of the other end of the pressing plate (210) is used for tightly pressing a workpiece.

6. The clamp as claimed in claim 5, wherein: the pressing plate (210) is provided with a second sliding groove (211), the pull rod (231) penetrates through the second sliding groove (211), and the pressing plate (210) takes the second sliding groove (211) as a guide to enable the position to move.

7. The clamp according to claim 1 or 5 or 6, characterized in that: the clamp comprises a clamping assembly (400), wherein the clamping assembly (400) is arranged on the base (100), and the clamping assembly (400) is used for clamping the workpiece.

8. The clamp as claimed in claim 7, wherein: the clamping assembly (400) comprises a mounting seat (410) and a set screw (420), wherein the mounting seat (410) is arranged on the base (100), the set screw (420) is in threaded connection with the mounting seat (410), and one end of the set screw (420) is used for being abutted to the outer side wall of the workpiece.

9. A clamp as claimed in claim 1, wherein: the fixture comprises a base plate (311), the base plate (311) is arranged on the base plate (100), the inner wall locating piece (310) is arranged on the upper side face of the base plate (311), and the workpiece is arranged on the upper side face of the base plate (311).

10. A machine tool, characterized in that: the machine tool is provided with a clamp as claimed in any one of claims 1 to 9.