CN217290471U

CN217290471U - Clamp for lathe

Info

Publication number: CN217290471U
Application number: CN202123434958.6U
Authority: CN
Inventors: 李丹; 陈刚; 何超; 只洁
Original assignee: Dongfeng Shiyan Auto Forging Steel Parts Co ltd
Current assignee: Dongfeng Shiyan Auto Forging Steel Parts Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-26
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a clamp for a lathe, belonging to the technical field of machine tool machining; it includes: the upper clamping assembly and the lower clamping assembly are arranged on the chuck; the lower clamping assembly comprises a lower limiting block, side limiting blocks and positioning blocks, the lower limiting block and the side limiting blocks are respectively fixedly connected with the chuck, a space for fixing the positioning blocks is formed between the lower limiting block and the side limiting blocks, the positioning blocks are respectively connected with the lower limiting block and the side limiting blocks through bolts, replaceable gaskets are arranged between the lower limiting block and the positioning blocks, the positioning blocks are provided with pin holes used for being connected with a workpiece, and the number of the pin holes is at least two; go up the centre gripping subassembly and include briquetting and connecting block, go up the jack catch of briquetting and chuck and be connected by the connecting block, the jack catch of chuck can drive the central removal of the relative chuck of briquetting to supply briquetting cooperation locating piece centre gripping work piece. The utility model discloses can conveniently be to the centre gripping of work piece.

Description

Clamp for lathe

Technical Field

The utility model relates to a machine tool machining technical field especially relates to an anchor clamps for lathe.

Background

When the cam bearing seat assembly is machined on a numerical control lathe, the first-choice problem to be solved is how to position and clamp a part, and because the cam bearing seat assembly is irregular in shape, the existing three-jaw chuck of the lathe cannot be used for clamping, and the cam bearing seat assembly has to be positioned and clamped by a special clamp. The cam bearing seat assembly shown in fig. 5 is an important part on an engine cylinder cover, a middle hole is machined after the upper cover and the lower seat are assembled through the positioning pins, the part is produced in large batch, and the boring efficiency of a numerically controlled lathe selected as a machining process is the highest.

The existing clamping tool cannot clamp the cam bearing seat assembly, and the requirement on the position degree of an inner hole is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a lathe fixture that solves the problem of the conventional cam bearing assembly being difficult to clamp.

The utility model provides an anchor clamps for lathe, include: the upper clamping assembly and the lower clamping assembly are arranged on the chuck;

the lower clamping assembly comprises a lower limiting block, side limiting blocks and positioning blocks, the lower limiting block and the side limiting blocks are fixedly connected with a chuck respectively, a space for fixing the positioning blocks is formed between the lower limiting block and the side limiting blocks, the positioning blocks are connected with the lower limiting block and the side limiting blocks respectively through bolts, replaceable gaskets are arranged between the lower limiting block and the positioning blocks and between the side limiting blocks and the positioning blocks, the positioning blocks are provided with pin holes for connecting with a workpiece, and the number of the pin holes is at least two;

go up the centre gripping subassembly and include briquetting and connecting block, the jack catch quilt of going up briquetting and chuck the connecting block is connected, and the jack catch of chuck can drive the center of going up the relative chuck of briquetting removes, in order to supply go up the briquetting cooperation locating piece centre gripping work piece.

Furthermore, the side limiting block is arranged on one side of the lower limiting block and is connected with the lower limiting block through a bolt.

Furthermore, the bottom and the lateral part of the positioning block are provided with screw holes used for being connected with the lower limiting block and the side limiting block, and the pin holes penetrate through the positioning block.

Furthermore, the pin holes are arranged at intervals, and the cross sections of the pin holes can be circular, rectangular or rhombic.

Further, the gasket is a hard gasket, and the thickness of the gasket is 0.1mm, 0.2mm, 0.5mm, 1mm or 2 mm.

Furthermore, the distance between the side limiting block and the upper pressing block is greater than the distance between the positioning block and the upper pressing block.

Furthermore, the connecting block is connected with the clamping jaw of the chuck through a bolt, and a clamping groove used for being connected with the upper pressing block is formed in the connecting block.

Furthermore, a clamping plate is arranged on one side of the upper pressing block and inserted into the clamping groove, the clamping plate is connected with the connecting block through a bolt, and the bolt is connected with the connecting block through the clamping plate.

Furthermore, one side of the upper pressing block is provided with a butting part, the butting part is arranged opposite to the positioning block, and the butting part can be butted with the side part of the workpiece.

Further, still be equipped with the balancing weight on the chuck, the balancing weight is connected with the chuck is detachable.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

(1) the utility model discloses an anchor clamps for lathe sets up spacing piece, side spacing piece and locating piece down on the chuck, down form the space of fixed positioning piece between spacing piece and the side spacing piece, it is spacing to the motion of locating piece in the chuck plane to accomplish spacing piece and side spacing piece down, be equipped with the pinhole that is used for being connected with the work piece on the locating piece, the pinhole is two at least, the both ends difference cartridge of pin is in pinhole and work piece, accomplish the location and the spacing of work piece, prevent that the work piece from removing.

(2) The utility model discloses an anchor clamps for lathe is equipped with removable gasket between spacing piece and the side spacing piece and the locating piece down, can adjust the position of locating piece through the thickness that changes the gasket for install the work piece on the locating piece and chuck to the heart setting, make things convenient for the turning operation of lathe.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic overall structure diagram of the present invention;

fig. 2 is a schematic structural view of the upper clamping assembly of the present invention;

FIG. 3 is a schematic structural view of the lower and middle clamping assemblies of the present invention;

FIG. 4 is a schematic structural view of the mounting workpiece of the present invention;

FIG. 5 is a schematic view of the structure of a workpiece held by the present invention;

in the figure, the lower clamping assembly 100, the lower limiting block 110, the side limiting block 120, the positioning block 130, the pin hole 131, the gasket 140, the upper clamping assembly 200, the upper pressing block 210, the clamping plate 211, the abutting portion 212, the connecting block 220, the clamping groove 221, the clamping chuck 300, the clamping jaws 310 and the balancing weight 400.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1 to 5, a clamp for a lathe according to the present embodiment includes: the upper clamping assembly 200 and the lower clamping assembly 100 are arranged on the chuck 300, and the upper clamping assembly 200 and the lower clamping assembly 100 work together to clamp and position a workpiece.

The lower clamping assembly 100 comprises a lower limiting block 110, a side limiting block 120 and a positioning block 130, wherein the lower limiting block 110 and the side limiting block 120 are fixedly connected with the chuck 300 through bolts, and the bolts respectively penetrate through the lower limiting block 110 and the side limiting block 120 and are screwed in the chuck 300. A space for fixing the positioning block 130 is formed between the lower limiting block 110 and the side limiting block 120, the positioning block 130 is respectively connected with the lower limiting block 110 and the side limiting block 120 through bolts, and the lower limiting block 110 and the side limiting block 120 complete the motion limiting of the positioning block 130 in the plane of the chuck 300. Replaceable gaskets 140 are arranged between the lower limiting block 110, the side limiting block 120 and the positioning block 130, and the position of the positioning block 130 can be adjusted by changing the thickness of the gaskets 140, so that a workpiece arranged on the positioning block 130 and the chuck 300 are arranged in a centering manner, and the turning operation of a lathe is facilitated. The positioning block 130 is provided with at least two pin holes 131 for connecting with a workpiece, and two ends of the pin are respectively inserted into the pin holes 131 and the workpiece to complete positioning and limiting of the workpiece.

The upper clamping assembly 200 comprises an upper pressing block 210 and a connecting block 220, the clamping jaws 310 of the upper pressing block 210 and the chuck 300 are connected through the connecting block 220, the clamping jaws 310 of the chuck 300 can drive the upper pressing block 210 to move relative to the center of the chuck 300, the lower pressing block presses against a workpiece, the workpiece is pressed against the positioning block 130, clamping force is applied to the workpiece, and the workpiece is stably fixed.

Referring to fig. 1 and 2, the side limiting block 120 is disposed at one side of the lower limiting block 110, the side limiting block 120 is connected to the lower limiting block 110 by a bolt, and the side limiting block 120 and the lower limiting block 110 form a T-shaped limiting space to limit the movement of the positioning block 130 in the plane of the chuck 300 and prevent the movement of the positioning block 130.

The bottom and the side of the positioning block 130 are provided with screw holes for connecting with the lower limiting block 110 and the side limiting block 120, and bolts penetrate through the lower limiting block 110 and the side limiting block 120 to be screwed with the positioning block 130 to fix the positioning block 130. The pin hole 131 penetrates through the positioning block 130, the pin can be inserted into the pin hole 131, the end of the pin penetrates through the pin to be abutted against the lower limiting block 110, the end of the pin is limited, and the other end of the pin can be inserted into a workpiece to position the workpiece.

Referring to fig. 1 and 4, the pin holes 131 are spaced, and the larger the spacing between the pin holes 131 is, the better the pin positioning effect is, and the positioning accuracy and stability of the pin to the workpiece can be improved by increasing the number of the pin holes 131. The cross-section of the pin hole 131 may be circular, rectangular or diamond-shaped, and a pin of a corresponding cross-section is used to mate with the pin hole 131.

The shim 140 is a hard shim 140, the shim 140 is an iron plate or a copper plate, the thickness of the shim 140 is 0.1mm, 0.2mm, 0.5mm, 1mm or 2mm, the shim 140 can change the distance between the positioning block 130 and the lower and

side limiting blocks

110 and 120, the distance can be precisely adjusted by stacking the shim 140, and thus the position of the pin hole 131 can be changed, and the axis of the inner hole of the workpiece positioned by the pin hole 131 and the pin is collinear with the central axis of the chuck 300.

The distance between the side limiting block 120 and the upper pressing block 210 is greater than the distance between the positioning block 130 and the upper pressing block 210. In the process of clamping the workpiece, the side limiting block 120 does not interfere with the bottom of the workpiece, so that the workpiece is not clamped stably.

Referring to fig. 3, the connecting block 220 is connected to the jaws 310 of the chuck 300 through bolts, the connecting block 220 can be driven to move by adjusting the positions of the jaws 310, and the connecting block 220 is provided with a slot 221 for connecting with the upper pressing block 210. As a further implementation manner, one side of the upper pressing block 210 is provided with a clamping plate 211, the clamping plate 211 is inserted into the clamping groove 221, the clamping plate 211 and the connecting block 220 are connected through a bolt, and the bolt penetrates through the clamping plate 211 and is connected with the connecting block 220.

Referring to fig. 3, an abutting portion 212 is disposed on one side of the upper pressing block 210, the abutting portion 212 is disposed opposite to the positioning block 130, and the abutting portion 212 can abut against a side portion of the workpiece. The bottom of the upper pressing block 210 is abutted against the middle of the workpiece, and an abutting part 212 is additionally abutted against the side part of the workpiece, so that the pressing force can be enhanced, and the workpiece can be prevented from being extruded and ejected.

Referring to fig. 1 and 4, the chuck 300 is further provided with a weight 400, the weight 400 is detachably connected to the chuck 300, and the dynamic balance of the chuck 300 can be adjusted by adjusting the weight 400, so that the chuck 300 can rotate more stably and smoothly.

The working process is as follows: firstly, the positioning block 130 is placed in a space formed between the lower limiting block 110 and the side limiting block 120, the workpiece is connected with the positioning block 130 through a pin, and the position of the positioning block 130 is adjusted by increasing or decreasing the thickness of the gasket 140, so that the center of the inner hole of the workpiece coincides with the center of the chuck 300. The positioning block 130 is fixedly connected to the lower limit block 110 and the side limit block 120 by bolts. The chuck 300 is adjusted to move the clamping jaws 310, and the clamping jaws 310 drive the upper pressing block 210 to move relative to the positioning block 130, so that the workpiece is clamped between the positioning block 130 and the upper pressing block 210.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A jig for a lathe, comprising: the upper clamping assembly and the lower clamping assembly are arranged on the chuck;

the lower clamping assembly comprises a lower limiting block, side limiting blocks and positioning blocks, the lower limiting block and the side limiting blocks are respectively fixedly connected with a chuck, a space for fixing the positioning blocks is formed between the lower limiting block and the side limiting blocks, the positioning blocks are respectively connected with the lower limiting block and the side limiting blocks through bolts, replaceable gaskets are arranged between the lower limiting block and the positioning blocks, the positioning blocks are provided with pin holes for connecting with a workpiece, and the number of the pin holes is at least two;

2. The jig for a lathe according to claim 1, wherein the side stopper is provided on one side of the lower stopper, and the side stopper is connected to the lower stopper by a bolt.

3. The jig for a lathe according to claim 2, wherein the bottom and the side of the positioning block are provided with screw holes for connecting the lower stopper and the side stopper, and the pin holes are provided through the positioning block.

4. The jig for lathe according to claim 1, wherein the pin holes are spaced apart from each other, and the cross section of the pin holes may be circular, rectangular or diamond-shaped.

5. The jig for lathe according to claim 1, wherein the shim is a hard shim and has a thickness of 0.1mm, 0.2mm, 0.5mm, 1mm or 2 mm.

6. The jig for lathe according to claim 1, wherein a distance of the side stopper with respect to the upper press block is larger than a distance of the positioning block with respect to the upper press block.

7. The lathe fixture according to claim 1, wherein the connecting block is connected with the jaws of the chuck through bolts, and a clamping groove for connecting with the upper pressing block is formed in the connecting block.

8. The clamp for lathe according to claim 7, wherein a clamping plate is provided on one side of the upper pressing block, the clamping plate is inserted into the clamping groove, the clamping plate and the connecting block are connected by a bolt, and the bolt is connected with the connecting block through the clamping plate.

9. The jig for a lathe according to claim 1, wherein an abutting portion is provided on one side of the upper press block, the abutting portion is provided opposite to the positioning block, and the abutting portion can abut against a side portion of the workpiece.

10. The lathe fixture of claim 1, wherein the chuck further comprises a weight block, and the weight block is detachably connected to the chuck.