CN219005309U - Multi-station clamp for machining small cylinder molded surface - Google Patents

Abstract

The utility model provides a multi-station clamp for machining a small cylinder profile. The side surface of the positioning plate is provided with a plurality of V-shaped structures, and each V-shaped structure can guide the cylindrical surface of the small cylinder to be aligned in a centering way; the end structure shape of the positioning block is matched with the end surface shape of the small cylinder, and the direction and the axial position of the small cylinder are limited. The end structure of the positioning block and the V-shaped structure of the positioning plate act together to ensure that the small cylinder is positioned on the fixture station quickly and accurately without repeated alignment. A plurality of positioning blocks are arranged on the clamp base and matched with a plurality of V-shaped structures on the side edges of the positioning plates to provide a plurality of stations. When the positioning profile of the clamp is worn, the clamp can be repaired and used continuously only by replacing the positioning block. The positioning blocks with different end shapes are replaced, and the positioning processing of small cylinders with different end surface shapes can be met.

Description

Multi-station clamp for machining small cylinder molded surface

Technical Field

The utility model belongs to the field of machine tool fixtures, and particularly relates to a multi-station fixture for machining a small cylinder profile.

Background

The production is usually in need of machining the molded surfaces at the two ends of the small cylinder part, and the molded surfaces at the two ends have the position requirements, so that the molded surfaces of the dress clamps are small and are not easy to align during the machining of the parts. As shown in fig. 14, the stop body is a small cylindrical part widely applied to a trigger switch in a product, the total length of the part is 18.8mm, and the two ends of the cylinder are provided with multi-surface structures: the end A is provided with an inclined plane and a step profile, the end B is provided with a groove and an arc-shaped rotary protrusion profile, and the mutual position accuracy requirements of the surfaces are higher.

The existing method for processing the end surface profiles of the two ends of the small cylindrical part comprises the following steps: firstly, machining a multi-surface structure at one end of a small cylinder, and when the other end is machined, aligning by taking the machined one-end molded surface as a reference, usually marking out the molded line at the other end by using a scribing ruler, and machining the molded surface at the other end by using a line alignment clamping part; or after one end profile of the part is processed, turning around and clamping the part, aligning a cutting board by taking the direction of the processed one end profile as a reference, and processing the other end profile. The processing method has the following defects: when the molded surface at the other end is processed by using the processed molded surface at one end as a reference, the alignment is difficult, time-consuming, large in error, low in production efficiency and poor in mutual position accuracy of the molded surfaces at the two ends of the processed cylinder.

Disclosure of Invention

The utility model provides a multi-station clamp for machining a small cylinder profile, which aims to solve the problems of difficult alignment, large error and low production efficiency in the prior art.

The technical scheme of the utility model is as follows: a multi-station fixture for machining a small cylinder profile comprises a base 1, a positioning plate 2 and a positioning block 5;

the top surface of the base 1 is a concave surface, two ends of the concave surface are symmetrically provided with first through grooves 9, and the width of each through groove ensures that small cylindrical parts to be processed can be placed; a plurality of second through grooves 10 which are not contacted with each other are formed on the concave surface, and the slotting direction of the second through grooves 10 and the slotting direction of the first through grooves 9 are mutually perpendicular; the concave surface is also provided with a plurality of mounting holes and pin holes; a plurality of locking mounting holes are symmetrically formed on the side surface of the base 1;

the plurality of positioning blocks 5 are respectively inserted into the plurality of second through grooves 10; the top surface is a multi-step special-shaped surface, and the middle part is provided with a pin hole;

the two symmetrical sides of the positioning plate 2 are provided with a plurality of V-shaped notches, the plate surface is provided with mounting holes, and the mounting holes are coaxial with the mounting holes at the corresponding positions on the concave surface of the base 1; the positioning plate 2 is fixedly connected with the concave surface after being arranged above the base 1;

the V-shaped notch is attached to the side wall surface of the small cylindrical part to be processed, and the cylindrical surface of the part is guided to be aligned in a centering way;

when one end of a small cylindrical part to be processed is arranged on the positioning block 5, the multi-step special-shaped surface on the positioning block 5 can be embedded into a groove at one end of the small cylindrical part, and the two structures are matched and matched; the positioning block 5 limits the position and the axial position of the small cylinder part around the rotation direction of the axle center.

The utility model further adopts the technical scheme that: the two ends of the bottom surface of the base 1 are symmetrically provided with L-shaped notches, and the notches are provided with U-shaped grooves which are convenient to connect on the working table of the machine tool through bolts and nuts; the mounting holes are used for mounting pin bolts; the hole opening position of the locking mounting hole formed in the side face ensures that the small cylindrical part to be processed can be further tightly propped and fixed when the locking nail is screwed in.

The utility model further adopts the technical scheme that: two long grooves are formed in the bottom surface of the base 1, the groove width of each long groove is in clearance fit with the hexagonal opposite sides of the nut 7, the nut 7 matched with the pin bolt 6 is arranged in the groove along the opposite sides, and the pin bolt 6 cannot rotate when screwed.

The utility model further adopts the technical scheme that: the bottom surface of the positioning plate 2 is provided with a groove at the position corresponding to the V-shaped notch, and the width of the groove ensures that the convex part of the positioning block 5 can be avoided, so that the positioning plate 2 is tightly attached to the bottom surface of the through groove in the middle of the base 1.

The utility model further adopts the technical scheme that: the material of locking nail needs to guarantee that locking nail can not crush the face of cylinder lateral wall of little cylinder part.

The utility model further adopts the technical scheme that: the locking nail is made of brass or zinc-copper alloy, aluminum-magnesium alloy and the like, has moderate hardness, is reliable in acting force during compaction, and can not crush the cylindrical surface of the small cylindrical part.

The utility model further adopts the technical scheme that: after the positioning block 5 is placed in the second through groove 10, the positioning block is positioned and connected through the positioning pin 8.

The utility model further adopts the technical scheme that: the width of the locating plate 2 is the same as the width of the concave surface of the base 1 after the first through groove 9 is formed.

Effects of the utility model

The utility model has the technical effects that:

1. the fixture base is arranged on the working table surface of the machine tool, and the positioning plate and the positioning block are fixedly connected to the base. The positioning block is positionedSmall cylinderThe positioning plate is positioned at the middle part of the small cylindrical part, a plurality of V-shaped structures are arranged on the side surface of the positioning plate, and each V-shaped structure can guide the cylindrical surface of the small cylindrical part to be aligned in a centering way; the end structure shape of the positioning block is matched with the processed end surface shape of the small cylinder part, and the position and the axial position of the small cylinder part around the rotation direction of the axle center are limited. The end structure of the positioning block and the V-shaped structure of the positioning plate act together to ensure that the small cylinder part is positioned on the fixture station quickly and accurately without repeated alignment.

2. A plurality of positioning blocks are arranged on the clamp base and matched with a plurality of V-shaped structures on the side edges of the positioning plates to provide a plurality of stations. After the fixture is fixed on the working table of the machine tool, the position of each station on the fixture in the coordinate system of the machine tool is fixed, and when the small cylindrical part is detached and then is loaded with a new workpiece after the molded surface of the small cylindrical part is machined, repeated alignment is not needed.

3. The locking nail is moderate in hardness, the acting force is reliable in compaction, the cylindrical surface of the small cylindrical part cannot be crushed, and the locking nail is made of copper alloy in the embodiment.

4. When the positioning profile of the clamp is worn, the clamp can be repaired and used continuously only by replacing the positioning block. The positioning blocks with different end shapes are replaced, and the positioning processing of small cylinder parts with different end surface shapes can be met.

Drawings

FIG. 1 is a perspective view of a multi-station fixture for machining small cylinder profiles according to the present utility model.

FIG. 2 is a partial cutaway perspective view of a multi-station fixture for small cylinder profile machining of the present utility model.

Fig. 3 is a front view of the multi-station fixture for machining small cylinder profiles of the present utility model.

Fig. 4 is a top view of the multi-station fixture for small cylinder profile machining of the present utility model.

Fig. 5 is a rear view of fig. 3.

Fig. 6 is a half cross-sectional view of a multi-station fixture for small cylinder profile machining in accordance with the present utility model.

Fig. 7 is a perspective view of the base.

Fig. 7a is a half cross-sectional view of the base.

Fig. 7b is a bottom view of fig. 7 a.

Fig. 7c is a left side view of fig. 7 a.

Fig. 8 is a schematic view of a positioning plate structure.

Fig. 9 is a schematic view of the positioning block structure.

Fig. 10 is a schematic view of the structure of the locking pin.

Fig. 11 is a schematic view of a pin screw configuration.

Fig. 12 is a schematic view of a dowel structure.

Fig. 13 is a schematic view of a hexagonal nut structure.

Fig. 14 is a schematic view of a small cylinder stopper part structure.

In the figure, 1-base, 2-locating plate, 3-locking pin, 4-small cylinder stopper, 5-locating block, 6-pin bolt, 7-hexagonal nut, 8-locating pin, 9-first through slot, 10-second through slot

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-14, a multi-station fixture for machining a small cylinder profile comprises a base 1, a positioning plate 2, a locking nail 3, a positioning block 5, a pin bolt 6, a hexagonal nut 7 and a positioning pin 8; the base 1 is of a cuboid structure and is fixedly connected to a working table of a machine tool through L-shaped notches formed in two ends, a rectangular through groove is formed in the middle of the base 1, and the slotting direction is perpendicular to the direction of the L-shaped notches; the bottom of the rectangular through groove is provided with a plurality of rectangular grooves, and the grooves are provided with positioning blocks 5 and are positioned and connected through positioning pins 8; the two ends of the positioning block 5 are matched and provided with stop body parts to be processed; the positioning plate 2 is arranged in the middle of the small cylindrical part 4 to be processed and is fixedly connected with the base 1 through a pin bolt 6 and a hexagonal nut 7; the side wall of the rectangular through groove of the base 1 is provided with a threaded hole for fastening the small cylindrical part 4 to be processed through the locking nail 3; the side edge of the positioning plate is provided with a V-shaped structure, and the two sides of the V-shaped structure are tangent and close to the cylindrical surface of the small cylindrical part 4 to guide the cylindrical surface of the small cylindrical part 4 to be centered and aligned; the end structure shape of the positioning block 5 is matched with the machined molded surface structure at one end of the small cylinder part 4, and the position and the axial position of the small cylinder part 4 around the axis rotation direction are limited; the end structure of the positioning block 5 and the V-shaped structure of the positioning plate work together to realize the rapid and accurate positioning of the small cylindrical part 4 on the fixture station and avoid repeated alignment. A plurality of positioning blocks arranged on the clamp base are matched with a plurality of V-shaped structures on the side edges of the positioning plates, so that the clamp can provide a plurality of stations.

Referring to fig. 7-7C; the L-shaped notches symmetrically formed at the two ends of the base 1 are provided with U-shaped grooves, so that the U-shaped grooves are conveniently connected to the working table of the machine tool through bolts and nuts. The bottom of the through groove in the middle of the base 1 is provided with a plurality of groups of through holes for loading the pin bolts and the positioning pins. Two long grooves are formed in the bottom surface of the base 1, the groove width is in small clearance fit with the hexagonal opposite sides of the nut 7, the nut 7 can be placed into the groove along the opposite side direction, and the nut cannot rotate when the pin bolt 6 is screwed.

Referring to fig. 8; the positioning plate 2 is rectangular, and a plurality of V-shaped grooves are formed in two side edges of the positioning plate; the bottom surface is provided with 6 grooves corresponding to the V-shaped part, so that the convex part of the positioning block 5 can be avoided, and the positioning plate 2 can be tightly attached to the bottom surface of the through groove in the middle of the base 1; the locating plate 2 is provided with 2 step holes for installing the pin bolts 6.

Referring to fig. 9; the positioning block 5 is a cuboid, a multi-step is formed on the positioning block, the raised step surface of the positioning block can be embedded into the end surface groove of the small cylinder part 4 to limit the rotation direction of the small cylinder part 4 around the axis, the concave step surface can enable the end part of the small cylinder part 4 to protrude and completely sink, the end part plane of the small cylinder part is tightly attached to the step surface of the positioning block, and the axial position of the small cylinder part is limited; the matching of the positioning block 5 and the groove width direction of the base 1 is H7/H6; the positioning block 5 is provided with a pin hole which is matched with the positioning pin 8 to form H8/H7.

Referring to fig. 10; the locking nail 3 is in a three-order concentric shaft shape, an inner hexagonal concave cavity is formed at the large cylindrical end, and a threaded structure is arranged on the circumference of the middle shaft; the locking nail 3 is made of copper alloy, has moderate hardness, is reliable in acting force during compaction, and can not crush the cylindrical surface of the small cylinder stop body.

Referring to fig. 11; the pin bolt 6 is in a three-order concentric shaft shape, an inner hexagonal concave cavity is formed at the end of the large cylinder, a threaded structure is arranged on the small cylinder at the other end, and the circumference of the middle part is matched with the holes of the positioning plate 2 and the base 1 to form H7/H6.

Referring to fig. 12; the positioning pin 8 is columnar, and the two ends of the positioning pin are provided with chamfers, so that the positioning pin can be conveniently arranged in holes of the base 1 and the positioning block 5; the matching of the locating pin 8 with the holes of the base 1 and the locating block 5 is H8/H7.

Referring to fig. 13; the hexagonal nut is GB/T41-2000.

When assembled:

1. the positioning blocks 5 are sequentially arranged in the grooves of the through grooves in the middle of the base 1 and fixedly connected by the positioning pins 8.

2. The positioning plate 2 is arranged on a through groove in the middle of the base 1 and is fixedly connected with the base 1 through a pin bolt 6 and a hexagonal nut 7;

3. install locking nail 3 in the screw hole of the logical groove lateral wall of base 1, the screw in direction is: screwed into the interior from the base side wall.

When in operation, the device comprises:

after the fixture device is installed, the U-shaped grooves on the step surfaces on two sides of the base are fixedly connected to the working table surface of the vertical machining center through bolts, the small cylinder stop body part is inserted into the V-shaped structure at one position of the positioning plate, the end face groove of the small cylinder stop body is clamped on the raised step of the positioning block, the step surface of the positioning block is close to the end face of the small cylinder part, at the moment, the small cylinder part is accurately positioned on the fixture station, the small cylinder part is clamped by the locking nail through the rotation of the inner hexagonal wrench, at the moment, high-speed shallow milling can be started, after machining is finished, the locking nail is unscrewed for 1/2 circle, the small cylinder part can be taken out, and when a workpiece is assembled again, the clamping action can be completed only by screwing the locking nail for 1/2 circle, the positioning is accurate, and repeated alignment is not needed. The fixture base is provided with a plurality of positioning blocks, and is matched with a V-shaped structure on the side face of the positioning plate, and the fixture provides a plurality of stations. In the embodiment, the fixture is provided with 6 positioning blocks, and twelve stations are provided. Each station of the fixture is fixed in position in a machine tool coordinate system, and repeated alignment is not needed when small cylindrical parts are assembled. The fixture is simple to operate, accurate in part positioning, fast in assembly and disassembly and high in efficiency.

Through the production verification of more than 120 stop body parts, the clamp in the embodiment can clamp and fix twelve workpieces at one time, and the processing of the end face molded surfaces of twelve small cylinder parts is completed through one-time continuous processing. The twelve stations are fixed in positions in a machine tool coordinate system, parts are discharged and then are positioned accurately without repeated alignment. And twelve stations are independently controllable, and each station can be assembled and disassembled quickly.

When the positioning profile of the clamp is worn, the clamp can be repaired and used continuously only by replacing the positioning block. The positioning blocks with different structural shapes are replaced, and the positioning processing of small cylindrical parts with different end surface shapes can be met.

Claims (8)

1. The multi-station clamp for machining the small cylinder profile is characterized by comprising a base (1), a positioning plate (2) and a positioning block (5);

the top surface of the base (1) is a concave surface, first through grooves (9) are symmetrically formed in two ends of the concave surface, and the width of each through groove ensures that small cylindrical parts to be processed can be placed; a plurality of second through grooves (10) which are not contacted with each other are formed on the concave surface, and the slotting direction of the second through grooves (10) and the slotting direction of the first through grooves (9) are mutually perpendicular; the concave surface is also provided with a plurality of mounting holes and pin holes; a plurality of locking mounting holes are symmetrically formed on the side surface of the base (1);

the number of the positioning blocks (5) is several, and the positioning blocks are respectively inserted into the second through grooves (10); the top surface is a multi-step special-shaped surface, and the middle part is provided with a pin hole;

the two symmetrical sides of the positioning plate (2) are provided with a plurality of V-shaped notches, the plate surface is provided with mounting holes, and the mounting holes are coaxial with the mounting holes at the corresponding positions on the concave surface of the base (1); the positioning plate (2) is fixedly connected with the concave surface after being arranged above the base (1);

the V-shaped notch is attached to the side wall surface of the small cylindrical part to be processed, and the cylindrical surface of the part is guided to be aligned in a centering way;

when one end of a small cylindrical part to be processed is arranged on the positioning block (5), the multi-step special-shaped surface on the positioning block (5) can be embedded into a groove at one end of the small cylindrical part, and the two structures are matched and matched; the positioning block (5) limits the position and the axial position of the small cylinder part around the rotation direction of the axle center.

2. The multi-station clamp for machining the small cylinder molded surface according to claim 1, wherein L-shaped notches are symmetrically formed at two ends of the bottom surface of the base (1), and U-shaped grooves are formed in the notches and are conveniently connected to a working table of a machine tool through bolts and nuts; the mounting holes are used for mounting pin bolts; the hole opening position of the locking mounting hole formed in the side face ensures that the small cylindrical part to be processed can be further tightly propped and fixed when the locking nail is screwed in.

3. A multi-station fixture for machining a small cylinder profile according to claim 2, wherein two long grooves are formed in the bottom surface of the base (1), the groove widths of the long grooves are in clearance fit with the hexagonal opposite sides of the nut (7), the nut (7) matched with the pin bolt (6) is arranged in the groove along the opposite sides, and the nut cannot rotate when the pin bolt (6) is screwed.

4. The multi-station clamp for machining the small cylinder molded surface according to claim 1, wherein a groove is formed in the position, corresponding to the V-shaped notch, of the bottom surface of the positioning plate (2), and the width of the groove ensures that the protruding part of the positioning block (5) can be avoided, so that the positioning plate (2) is tightly attached to the bottom surface of the through groove in the middle of the base (1).

5. The multi-station clamp for machining the small cylinder profile according to claim 2, wherein the locking nails are made of materials which ensure that the locking nails cannot crush the cylindrical surface side wall of the small cylinder part.

6. The multi-station clamp for machining the small cylinder profile according to claim 5, wherein the locking nails are made of brass or zinc-copper alloy, aluminum-magnesium alloy and the like, have moderate hardness, are reliable in acting force during compaction, and do not crush the cylindrical surface of the small cylinder part.

7. A multi-station fixture for machining small cylinder profiles according to claim 1, characterized in that the positioning blocks (5) are positioned and connected by positioning pins (8) after being placed in the second through grooves (10).

8. The multi-station fixture for machining the small cylinder molded surface according to claim 1, wherein the width of the positioning plate (2) is the same as the width of the concave surface of the base (1) after the first through groove (9) is formed.

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