CN215659070U

CN215659070U - Special clamp for multi-station secondary box body

Info

Publication number: CN215659070U
Application number: CN202121643425.6U
Authority: CN
Inventors: 梅亚飞; 石凯; 刘平; 梅永兵; 梅朋; 梅和奎
Original assignee: Hangzhou Yafei Machinery Manufacturing Co ltd
Current assignee: Hangzhou Yafei Machinery Manufacturing Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-01-28
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to the technical field of tool fixtures, and aims to stably clamp a secondary box body during machining and ensure machining precision. In particular to a special clamp for a multi-station secondary box body, which comprises a bottom plate, at least one clamping station and at least one positioning station; the clamping station comprises an arc-shaped block, a first positioning block, a second positioning block and a third positioning block, the arc-shaped block, the first positioning block and the arc-shaped block are oppositely arranged along the left and right direction, the second positioning block and the third positioning block are oppositely arranged along the front and back direction, sunken positioning steps are respectively arranged on the inner side of the arc-shaped block and the inner side of each positioning block, the positioning steps of the arc-shaped block are arc-shaped and are adaptive to the radius of a small round end of a boss, each positioning block is provided with a screw hole which penetrates through a vertical surface of the positioning step from the outer side to the inner side, and a threaded positioning pin is screwed into the screw hole from the outer end of the screw hole; the positioning station comprises a first positioning shaft and a second positioning shaft which are vertically fixed on the top surface of the bottom plate, the first positioning shaft is in clearance fit with the first shaft hole, and the second positioning shaft is in fit with the second shaft hole.

Description

Special clamp for multi-station secondary box body

Technical Field

The utility model relates to the technical field of tool fixtures, in particular to a special fixture for a multi-station two-stage box body.

Background

As shown in fig. 1 to 3, after the casting box body is subjected to primary treatment and connection holes, a first connection surface C1 on the inner side of the box body and a second connection surface C2 on the outer side of the box body need to be milled or ground, the second connection surface C2 is the top surface of a protrusion on the outer side of the box body, the protrusion is in a gourd shape and is composed of a large circular part C2.1 and a small circular part C2.2, the large circular part C2.1 is coaxial with a first shaft hole B1 of the second-level box body, and the small circular part is coaxial with a second shaft hole B2 of the second-level box body. Because the second-level box body is large in size and irregular in shape, the universal clamp cannot clamp when a machining center is machined, and a new clamp needs to be designed for the machining center.

Disclosure of Invention

The utility model aims to overcome the defects in the background technology, and provides the special clamp for the multi-station secondary box, which can stably clamp the secondary box during processing to ensure the processing precision and has the technical characteristics of simple structure and convenient use.

The technical purpose of the utility model is realized as follows:

a special clamp for a multi-station secondary box body comprises a bottom plate, at least one clamping station and at least one positioning station;

the bottom plate is fixed on a workbench of the machining center;

the clamping station is used for clamping a boss on the outer side of the box body when a first connecting surface is machined, and comprises an arc-shaped block, a first positioning block, a second positioning block and a third positioning block, wherein the arc-shaped block, the first positioning block, the second positioning block and the third positioning block are fixed on the top surface of the bottom plate;

the positioning station is used for positioning a first shaft hole and a second shaft hole of the box body when the second connecting surface is machined, and comprises a first positioning shaft and a second positioning shaft which are vertically fixed on the top surface of the bottom plate, wherein the first positioning shaft is in clearance fit with the first shaft hole, and the second positioning shaft is in clearance fit with the second shaft hole.

Preferably, the distance between the positioning step of the arc-shaped block and the positioning step of the first positioning block is adapted to the length of the boss in the left-right direction; the distance between the second positioning block and the third positioning block is adapted to the diameter of the big circular end of the boss.

The utility model has the beneficial effects that: according to the structural characteristics of the secondary box body, the boss is stably clamped by the arc-shaped block and the positioning block, the first connecting surface is convenient to process, the two positioning shafts are matched with the shaft holes respectively, the secondary box body is positioned, the second connecting surface is convenient to process, the processing precision is ensured, and the secondary box body has the technical characteristics of simple structure and convenience in use.

Drawings

Fig. 1 is a schematic front view of a secondary box.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Fig. 3 is a rear view structural diagram of the secondary box body.

Fig. 4 is a schematic top view of the present invention.

Fig. 5 is a schematic sectional view along line B-B of fig. 4.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, but the present invention is not limited to the following examples, so that the objects, solutions and advantages of the present invention can be more clearly understood by those skilled in the art.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified and limited, specific meanings of the general terms in the present invention may be specifically understood by those skilled in the art.

As shown in fig. 4 and 5, the special fixture for the multi-station two-stage box provided by the utility model comprises a bottom plate 1, at least one clamping station and at least one positioning station. The number of the stations is set according to the requirement, and eight clamping stations and eight positioning stations are arranged in the figure 4. The bottom plate 1 is fixed on a workbench of a machining center.

The clamping station is used for clamping the boss on the outer side of the box body when the first connecting surface C1 is machined. The clamping station comprises an arc-shaped block 4 fixed on the top surface of the bottom plate 1, a first positioning block 3.1, a second positioning block 3.2 and a third positioning block 3.3. First locating piece 3.1 and arc 4 along left right direction mutual disposition, second locating piece 3.2, third locating piece 3.3 is along the fore-and-aft direction mutual disposition, the inboard of arc 4 and the inboard of each locating piece all have sunken location step 7, the location step 7 of arc 4 is the arc and suits with the radius of the little round end C2.2 of boss, the screw that inwards link up the vertical face of location step 7 from the outside is all seted up to each locating piece, screw thread locating pin 2 is in the screw from screw outer end screw in screw.

The positioning station is used for positioning a first shaft hole B1 and a second shaft hole B2 of the box body when the second connecting surface C2 is machined. The positioning station comprises a first positioning shaft 6 and a second positioning shaft 5 which are vertically fixed on the top surface of the bottom plate 1. The first positioning shaft 6 is in clearance fit with the first shaft hole B1, and the second positioning shaft 5 is in fit with the second shaft hole B2.

The distance between the positioning step 7 of the arc-shaped block 4 and the positioning step 7 of the first positioning block 3.1 is matched with the length of the boss in the left-right direction. The distance between the second positioning block 3.2 and the third positioning block 3.3 is adapted to the diameter of the large round end C2.1 of the boss.

The working principle of the utility model is as follows:

when the first connecting surface C1 is machined, the first connecting surface C1 faces upwards, the small round end C2.2 of the boss is placed on the positioning steps 7 of the arc-shaped block 4, the large round end C2.1 is placed on the positioning steps 7 of the three positioning blocks, then the boss is clamped tightly by screwing the threaded positioning pins 2 of the three positioning blocks, the secondary box body is fixed, and the first connecting surface C1 can be machined;

when processing second connection face C2, second connection face C2 on the boss is up, and first connection face C1 is down, with first axle hole B1 and second axle hole B2 respectively with first location axle 6 and the alignment of second location axle 5, the location axle inserts in the corresponding axle hole to first location axle 6's top must not stretch out from first axle hole B1, and the second grade box is fixed a position this moment, can carry out the processing of second connection face C2.

The above description is only a preferred embodiment of the present invention, and various modifications and changes may be made by those skilled in the art. 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 present invention.

Claims

1. The utility model provides a multistation second grade box special fixture which characterized in that: comprises a bottom plate (1), at least one clamping station and at least one positioning station;

the bottom plate (1) is fixed on a workbench of a machining center;

the clamping station is used for clamping a boss on the outer side of a box body when a first connecting surface (C1) is machined, and comprises an arc-shaped block (4), a first positioning block (3.1), a second positioning block (3.2) and a third positioning block (3.3) which are fixed on the top surface of a bottom plate (1), wherein the first positioning block (3.1) and the arc-shaped block (4) are oppositely arranged along the left-right direction, the second positioning block (3.2) and the third positioning block (3.3) are oppositely arranged along the front-back direction, sunken positioning steps (7) are respectively formed on the inner side of the arc-shaped block (4) and the inner side of each positioning block, the positioning steps (7) of the arc-shaped block (4) are arc-shaped and are matched with the radius of a small round end (C2.2) of the boss, each positioning block is provided with a screw hole which penetrates through the positioning step (7) from the outer side to the inner side, and the threaded positioning pin (2) is screwed into the screw hole from the outer end of the screw hole;

the location station is used for the second to connect face (C2) to process first shaft hole (B1) and second shaft hole (B2) of location box, including vertical first location axle (6) and the second location axle (5) of fixing at bottom plate (1) top surface, first location axle (6) and first shaft hole (B1) clearance fit, second location axle (5) and second shaft hole (B2) cooperation.

2. The special clamp for the multi-station secondary box body as claimed in claim 1, wherein: the distance between the positioning step (7) of the arc-shaped block (4) and the positioning step (7) of the first positioning block (3.1) is matched with the length of the boss in the left-right direction; the distance between the second positioning block (3.2) and the third positioning block (3.3) is adapted to the diameter of the big circular end (C2.1) of the boss.