CN203343781U - Eccentric hole machining clamp used for lathe - Google Patents

Abstract

The utility model belongs to a processing jig for a lathe, and discloses an eccentric hole processing jig for a lathe. Its main features are composed of a positioning shaft, a positioning disc, and a workpiece clamping device; the positioning shaft is connected and fixed coaxially with one end of the positioning disc, and the workpiece clamping device is arranged on the other side of the positioning disc. The workpiece clamping device is composed of a half ring and a fixing bolt. One of the connecting parts of the half ring is connected by a hinge, and the other connecting part of the half ring is fixed by a detachable connecting piece. It is symmetrical on the half ring and along the center of the half ring. Set at least two fixing bolts, the ends of the fixing bolts point to the center of the half ring, and the ends of the fixing bolts are connected with anti-off parts, and the half ring is connected and fixed with the end face of the side positioning disc through the connecting plate. The new fixture is suitable for clamping cylindrical workpieces of different diameters of a certain size, has high positioning efficiency, accurate positioning, and convenient loading and unloading of workpieces, and is especially suitable for mass production.

Description

An eccentric hole machining jig for a lathe

technical field

The utility model belongs to a processing jig for a lathe, in particular to an eccentric hole processing jig for a lathe.

Background technique

In the process of mechanical cold working, we often encounter some difficult problems. For example, some have inclined surfaces, inclined holes, eccentricities, curved surfaces, etc., which are usually impossible to complete with ordinary machine tools. Even if they are completed, it is difficult to guarantee the quality. At this time, fixtures are used in production. Fixtures play an extremely important role in the entire cutting processing industry. Production workers can complete the processing of special-shaped parts on ordinary machine tools by using suitable fixtures.

Currently, for turning eccentric holes. In the traditional method, the fitter first draws the position of the eccentric hole according to the drawing, and then the turner turns the eccentric hole after alignment with a four-jaw single chuck or a common fixture such as a bent plate or a face plate on the drawn hole line. The traditional method can process eccentric holes, but the operation process is difficult, the difficulty of adjusting the eccentric distance is high, and the operator experience is high, especially in mass production, it is difficult to guarantee product quality and cannot meet the requirements of mass production.

Utility model content

The technical solution adopted by the utility model for solving the technical problems is to design a fixture for processing eccentric holes for a lathe, which is composed of a positioning shaft, a positioning disc, and a workpiece clamping device; The shaft is connected and fixed, and the workpiece clamping device is arranged on the other side of the positioning disc. The workpiece clamping device is composed of a half ring and a fixing bolt. One of the connecting parts of the half ring is connected in a hinged manner, and the other half ring The first connecting part is fixed by a detachable connecting piece, and at least two fixing bolts are symmetrically arranged on the half ring and along the center of the half ring. , the half ring is connected and fixed with the end face of the side positioning disc through the connecting plate.

Further, the half ring is arranged coaxially with the positioning disc.

Further, the anti-off piece is a V-shaped block.

Further, the hinged way is specifically to use a first pin to hinge, the detachable connecting member is specifically a swing bolt, and the swing bolt and the half ring are hinged through a second pin.

Further, the end of the positioning shaft is conical.

Further, the number of the fixing bolts is two.

Further, an eccentricity scale value is provided on the end face of the positioning disc facing the side of the clamping device.

Further, the V-shaped block is integrally connected with the end of the fixing bolt.

The beneficial effects of the utility model are: the new fixture can be suitable for clamping cylindrical workpieces of different diameters of a certain size, has high eccentric positioning efficiency, accurate positioning, convenient loading and unloading of workpieces, and is especially suitable for mass production.

Description of drawings

Fig. 1 is the structure schematic diagram of a kind of eccentric hole processing jig of lathe of the present invention;

Fig. 2 is a left side view of Fig. 1 .

Detailed ways

Referring to Figures 1 and 2, an eccentric hole machining fixture for a lathe is composed of a positioning shaft 1, a positioning disc 2, and a workpiece clamping device 3; The end of the shaft 1 is conical. The workpiece clamping device 3 is arranged on the other side of the positioning disc 2. The workpiece clamping device 3 is composed of a half ring 31 and a fixing bolt 32. One of the connecting parts of the half ring 31 It is connected in a hinged way, the hinged way is specifically to use the first pin shaft 33 to be hinged, and the other connecting part of the half ring 31 is fixed by a detachable connector, and the detachable connector is specifically a swing bolt 34, a swing bolt 34 Hinged with the half ring 31 by the second pin shaft 35, on the half ring 31, at least two fixing bolts 32 are arranged symmetrically along the center of the half ring 31, the number of the fixing bolts 32 can be two specifically, the number of fixing bolts 32 The end points to the center of the half ring 31, and the anti-off piece is connected at the end of the fixing bolt 32. The anti-off piece is a V-shaped block 36, and the V-shaped block 36 is connected as a whole with the end of the fixing bolt 32, and the half-ring 31 The connecting plate 4 is connected and fixed with the end face of the side positioning disc 2 , the half ring 31 is arranged coaxially with the positioning disc 2 , and the end face of the positioning disc 2 facing the side of the clamping device 3 is provided with an eccentricity scale value.

During use, the positioning shaft 1 is assembled in the main shaft of the lathe, the nut on the joint bolt 34 is loosened, the joint bolt 34 can rotate around the second pin shaft 35, the half ring 31 can rotate around the first pin shaft 33, and put Tighten the nut of the joint bolt 34 after the workpiece, the workpiece can be marked, cooperate with the positioning disc 2 to find the orientation and eccentric point of the workpiece, loosen the fixing bolt 32, adjust the position of the workpiece, and then tighten it, use the V-shaped block 36 After clamping the workpiece, unscrew the joint bolt 34 and the fixing bolt 32 after finishing the work, and the workpiece can be removed.

Claims (8)

1. an eccentric hole processing fixture for lathe, is characterized in that: locating shaft, positioning disc, Workpiece clamping device, consist of; Described locating shaft and positioning disc one end face coaxially are connected and fixed, described Workpiece clamping device is arranged on the opposite side of positioning disc, this Workpiece clamping device is comprised of semi-ring, set bolt, one of them connecting portion of semi-ring adopts articulated manner to be connected, another connecting portion of semi-ring adopts removable connector to fix, on semi-ring, along at least two set bolts of Central Symmetry setting of semi-ring, the center of semi-ring is pointed in the termination of set bolt, and connecting anti-falling piece in the termination of set bolt, semi-ring is connected and fixed by connecting plate and this side positioning disc end face.

2. a kind of eccentric hole processing fixture for lathe as claimed in claim 1, it is characterized in that: described semi-ring and positioning disc coaxially arrange.

3. a kind of eccentric hole processing fixture for lathe as claimed in claim 1, it is characterized in that: described anti-falling piece is vee-block.

4. a kind of eccentric hole processing fixture for lathe as claimed in claim 1, it is characterized in that: described articulated manner specifically adopts the first bearing pin hinged, and described removable connector is eyelet bolt specifically, and eyelet bolt and semi-ring are hinged by the second bearing pin.

5. a kind of eccentric hole processing fixture for lathe as claimed in claim 1 is characterized in that: described locating shaft end is conical.

6. a kind of eccentric hole processing fixture for lathe as claimed in claim 1, it is characterized in that: the number of described set bolt is two.

7. a kind of eccentric hole processing fixture for lathe as claimed in claim 1, it is characterized in that: described positioning disc is provided with the eccentric throw scale value towards the end face of clamping device one side.

8. a kind of eccentric hole processing fixture for lathe as claimed in claim 3, it is characterized in that: the termination of described vee-block and set bolt links into an integrated entity.

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