CN207534448U - A kind of convex arc pressure-bearing Machining Arc fixture - Google Patents

Abstract

The utility model discloses a fixture for processing arcs of convex arc pressure bearing strips, which belongs to the field of fixtures and aims to provide a fixture for processing the arc surface of pressure bearing strips. The technical scheme is as follows, including a fixture body, the fixture body is A hollow cylinder inside, one end of the cylinder communicates with the inside of the clamp body, and at least one groove is provided on the outside of the clamp body along its axial direction, the groove runs through both ends of the clamp body, and the groove There are several threaded holes for the bolts to pass through on the bottom of the groove. The fixture body and grooves are adopted, and several grooves are arranged on the fixture body, and the pressure-bearing strips are fixed in the grooves, and multiple pressure-bearing strips can be processed at one time during processing, which improves the processing efficiency of the pressure-bearing strips.

Description

A fixture for processing arcs of convex arc pressure bearing strips

technical field

The utility model relates to a fixture, in particular to a fixture for processing arcs of convex arc pressure-bearing strips.

Background technique

The convex-arc pressure-bearing strip is a water-stopping part in the middle seam of a miter valve, and the working surface on one side is a circular arc surface. Therefore, the curved pressure-bearing strip is troublesome when processing the convex arc. The existing arc is processed by a numerical control machining center, and only one convex arc can be processed at a time, and the processing efficiency is low.

Utility model content

The purpose of the utility model is to provide a fixture for processing arcs of convex arc pressure bearing strips, which has the effect of improving the processing efficiency of the arc surface of pressure bearing strips.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A fixture for processing arcs of convex-arc pressure-bearing strips, including a fixture body, the fixture body is a hollow cylinder, one end of the cylinder communicates with the inside of the fixture body, and the outside of the fixture body extends upward along its axial direction. At least one groove is provided, and the groove runs through both ends of the fixture body, and a plurality of threaded holes for bolts to pass through are arranged on the groove bottom of the groove.

By adopting the above-mentioned technical scheme, in order to improve the processing efficiency of the arc surface of the pressure-bearing strip, the clamp for processing the pressure-bearing strip is set as a cylinder, and there are a number of grooves arrayed on the outer circumference of the cylinder, and the grooves run through Both ends of the clamp body. By setting the groove, not only the pressure-bearing strip can be fixed in the groove by bolts, but also the two side walls of the groove can reduce the displacement of the pressure-bearing strip during the rotation of the fixture body, making the processing arc smoother. The disassembly between the fixture body and the pressure-bearing strip is convenient, and each group can process multiple pressure-bearing strips, which reduces the processing time and improves the processing efficiency.

Further, there are protrusions extending upwards on both side walls of the groove, and the protrusions are arranged symmetrically along the vertical axis of the groove.

By adopting the above technical solution, during the machining and cutting of the arc surface of the pressure-bearing strip, the pressure-bearing strip is prone to vibration displacement due to the rotation of the fixture body, thereby affecting the machining of the arc surface. The provided bumps are in direct contact with both sides of the pressure-bearing strip, limiting the displacement of the pressure-bearing strip, and together with the bolts, play a role of fixing and positioning the pressure-bearing strip.

Further, the transverse cross-sectional shape of the protrusion is triangular, and the upper surface of the protrusion is provided with a first arc surface, and the first arc surface is integrally connected with the outside of the clamp body.

By adopting the above technical solution, during the processing of the pressure-bearing strip, the tool is turned from the outside of the fixture body along the direction of the first arc surface, which reduces the wear of the tool head caused by the collision between the tool and the bump, thereby affecting the processing of the pressure-bearing strip. In addition, the triangular bump uses less material and can reduce the weight of the jig body.

Further, sliding grooves are provided on the opposite side walls of the protrusion, and a connecting block is slidably connected in the sliding groove, and the upper surface of the connecting block is provided with second arc.

By adopting the above technical solution, due to the large size of the fixture body, it is difficult to move, resulting in a lot of waste of manpower and material resources. In order to make the fixture body move smoothly, a connecting block is slidably connected to the two side walls of the convex block, and the groove is filled up, and the upper surface of the connecting block and the first arc surface have the same center and same radius, so that the connecting block and the convex The blocks are connected smoothly, forming a semicircle. When the fixture body moves, it can be rolled directly, which is convenient, quick and labor-saving. In addition, the connection block is disassembled and connected with the protruding block, so that the connection block can be disassembled conveniently without affecting the fixing of the pressure-bearing strip.

Further, a plane is provided at the connection between the two ends of the groove and the outside of the clamp body.

By adopting the above technical solution, when processing the arc surface of the pressure-bearing strip, the fixture body is directly fixed in the jaws of the lathe. Due to the large size of the fixture body, the claws tend to slide on the fixture body during the rotation process, causing the fixture body to deviate from the cross centerline of the claws, thereby affecting the processing of the pressure-bearing strip. In order to reduce the sliding of the clamp body in the claw, a plane is provided at the connection between the groove and the outside of the clamp body, which increases the contact area between the claw and the clamp body, making the clamp body more stable and improving work efficiency. At the same time, the weight of the fixture body can be reduced.

Further, a plurality of reinforcing ribs are arrayed in the circumferential direction inside the clamp body, and the reinforcing ribs are arranged along the axial direction of the clamp body.

By adopting the above technical solution, one end of the fixture body is clamped in the claw on the lathe, and the other end is abutted by the tailstock of the lathe. When the pressure-bearing strip is processed, the fixture body not only bears the weight of the pressure-bearing strip, but also bears the downward pressure during the cutting process of the tool. In order to prolong the service life of the fixture body, reinforcing ribs are provided inside to improve the strength and rigidity of the fixture body.

Further, the reinforcing rib is connected to the inner wall of the clamp body in an arc transition.

By adopting the above technical scheme, the connection between the reinforcement rib and the inner wall of the fixture body adopts a circular arc transition, which reduces the stress concentration at the connection and prolongs the service life of the reinforcement rib.

Further, a lightening hole is provided in the middle of the outer side of the clamp body along its axial direction, and the lightening hole is located between the two grooves.

By adopting the above technical solution, due to the large size of the fixture body, the jaws need to clamp the fixture body firmly and bear most of the weight of the fixture body during clamping. After working for a long time, the jaws will be damaged. In order to reduce the weight of the fixture body, there is a weight-reducing hole between the grooves, which can not only reduce the use of materials, but also facilitate the workers to twist the nut from the weight-reducing hole. Fasten the pressure strip.

In summary, the utility model has the following beneficial effects:

1. The fixture body and grooves are adopted. There are several grooves on the fixture body, and the pressure-bearing strips are fixed in the grooves. During processing, multiple pressure-bearing strips can be processed at one time, which improves the processing efficiency of the pressure-bearing strips;

2. The convex block is used to make the vibration displacement not easy to occur during the turning and cutting, and it plays a role in positioning the pressure strip;

3. The connecting block is adopted, and the second arc surface on the upper surface of the connecting block has the same center and radius as the first arc surface on the bump, so that the transition between the two bumps through the connecting block is convenient for rolling the fixture body, which is faster Save effort.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of this embodiment.

In the figure, 1, clamp body; 11, groove; 111, threaded hole; 112, bolt; 12, bump; 121, first arc surface; 122, chute; 1221, connecting block; 1222, second arc ; 13, plane; 14, lightening hole; 15, reinforcing rib.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Face", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

A fixture for machining arcs of convex-arc pressure-bearing strips, as shown in FIG. 1 , includes a fixture body 1, which is a hollow cylinder inside. In order to facilitate clamping of the clamp body 1 on the lathe, the cylindrical body communicates with the inside of the clamp body 1 and is fixed by the jaws of the lathe, and the other end is supported by the tailstock of the lathe.

As shown in FIG. 1 , grooves 11 are provided axially on the outer side of the clamp body 1 , the grooves 11 run through both ends of the clamp body 1 , and there are four grooves 11 arrayed along the circumferential direction of the clamp body 1 . The groove bottom of the groove 11 is provided with several threaded holes 111, and the pressure-bearing strip is placed in the groove 11 and fixed by bolts. In order to reduce the vibration displacement generated during the processing of the pressure-bearing strip, on the opposite side walls of the groove 11 , there are protrusions 12 with a triangular cross-sectional shape extending upwards, and the protrusions 12 are located in the middle of the groove 11 . The upper surface of the bump 12 is provided with a first arc surface 121, and the first arc surface 121 is connected with the outside of the fixture body 1 as a whole, and the tool is turned along the first arc surface 121 to reduce the collision between the tool and the bump 12, resulting in Tool is broken.

As shown in Figure 1, in order to facilitate the movement of the fixture body 1, a sliding groove 122 is provided on the opposite side walls of the protrusion 12, and a connecting block 1221 is slidably connected in the sliding groove 122, and a first connecting block 1221 is provided on the upper surface of the connecting block 1221. The two arc surfaces 1222, the second arc surface 1222 and the first arc surface 121 have the same center and the same radius, so that the clamp body 1 can be rolled, so that the movement of the clamp body 1 saves time and effort.

As shown in FIG. 1 , a lightening hole 14 is provided between the grooves 11 , and the lightening hole 14 is arranged axially along the clamp body 1 . The lightening hole 14 can not only reduce the weight of the fixture body 1, but also make it convenient to reach in and twist the bolt.

As shown in Figure 1, due to the large size of the clamp body 1, the claws tend to slide on the clamp body 1 during rotation, causing the clamp body 1 to deviate from the cross centerline of the claws, thereby affecting the processing of the pressure-bearing strip. In order to reduce the sliding of the clamp body 1 in the jaws, a flat surface 13 is provided at the connection between the groove 11 and the outside of the clamp body 1, which increases the contact area between the jaws and the clamp body 1, so that the clamp body 1 clamps more. Stablize.

As shown in FIG. 1 , in order to improve the strength and rigidity of the fixture body 1 , a reinforcing rib 15 is arranged inside the fixture body 1 along its axial direction, and several reinforcing ribs 15 are arrayed along the axial direction of the fixture body 1 . The circular arc transition connection between the reinforcing rib 15 and the inner wall of the fixture body 1 reduces the stress concentration at the joint between the reinforcing rib 15 and the inner wall of the fixture body 1 and prolongs the service life of the reinforcing rib 15 .

Specific implementation method: the pressure-bearing strip is placed in the groove 11, and the bolt is screwed into the threaded hole 111 from the weight-reducing hole 14, thereby fixing the pressure-bearing strip. Put the fixture body 1 on the lathe, one end is fixed by the jaw of the lathe, and the other end is supported by the tailstock of the lathe. Start the lathe to process the arc surface of the pressure strip, and four pieces can be processed at a time, which improves the processing efficiency of the arc surface of the pressure strip.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (8)

1. a kind of convex arc pressure-bearing Machining Arc fixture, including chuck body (1), it is characterized in that：The chuck body (1) is The cylinder of inner hollow, one end of the cylinder and chuck body (1) inside connect, edge on the outside of the chuck body (1) Its axial direction is equipped at least one groove (11), the groove (11) through the both ends of chuck body (1), the groove (11) Slot bottom is equipped with several threaded holes (111) being pierced by for bolt.

2. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 1, it is characterized in that：The groove (11) Two side has upwardly extended convex block (12), and the convex block (12) is erected central axes along groove (11) and is symmetrical arranged.

3. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 2, it is characterized in that：The convex block (12) Lateral cross section shape is triangle, and the upper surface of the convex block (12) is equipped with the first cambered surface (121), first cambered surface (121) With being connected as one on the outside of chuck body (1).

4. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 3, it is characterized in that：Convex block (12) phase To two side be equipped with sliding slot (122), in the sliding slot (122) sliding be connected with link block (1221), the link block (1221) upper surface is equipped with second cambered surface (1222) identical with the center of circle of the first cambered surface (121) and radius.

5. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 1, it is characterized in that：The groove (11) two End is equipped with plane (13) with the junction on the outside of chuck body (1).

6. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 5, it is characterized in that：The chuck body (1) internal circumferential, which is gone into battle, shows several reinforcing ribs (15), and the reinforcing rib (15) is axially set along chuck body (1).

7. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 6, it is characterized in that：The reinforcing rib (15) It is connect with chuck body (1) inner wall arc transition.

8. a kind of convex arc pressure-bearing Machining Arc fixture according to claim 1, it is characterized in that：The chuck body (1) outer middle side part is equipped with lightening hole (14) along its axial direction, and the lightening hole (14) is between two grooves (11).