CN211866628U

CN211866628U - Hexagonal chuck type lathe fixture

Info

Publication number: CN211866628U
Application number: CN202020348380.9U
Authority: CN
Inventors: 董健
Original assignee: Wuxi Deshen Precision Engineering Co ltd
Current assignee: Wuxi Deshen Precision Engineering Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-11-06
Anticipated expiration: 2030-03-18

Abstract

The utility model relates to a hexagonal chuck formula turning attachment, including the base, the last surface mounting joint subassembly of base, surface mounting has the clamping jaw on each claw portion of joint subassembly, still installs the guide board on the joint subassembly, the lower extreme of bracing piece and the upper surface rigid coupling of guide board, the upper end of bracing piece and the lower surface rigid coupling of locating plate down, the upper surface of locating plate down and the lower surface subsides of locating plate connect down, install the elastic pin subassembly on the locating plate down, the elastic pin subassembly passes and stretches out the locating plate. The utility model has the advantages that the hexagonal chuck is arranged, so that the barrel type workpiece is firmly clamped, and meanwhile, the elastic pin component is adopted to support the thin-wall characteristic of the workpiece, so that the workpiece can be accurately positioned in the clamping and processing processes, and the damage caused by large-amount impact can be avoided; by the fixture, the upper end and the lower end of a thin-wall cylinder workpiece can be reliably positioned and clamped and cannot shake along with the vibration of a lathe spindle; the hexagonal chuck and the elastic pin assembly are compact in structure, and installation space is effectively saved.

Description

Hexagonal chuck type lathe fixture

Technical Field

The utility model belongs to the technical field of the turning attachment technique and specifically relates to a hexagonal chuck formula turning attachment.

Background

When some cylindrical thin-wall parts are machined, special clamping is usually required due to the serious machining deformation phenomenon. At present, part of clamps are clamped and fixed in an elastic clamping sleeve mode, but are not suitable for all workpieces. The elastic jacket has processing flexibility, so that the deformation of the elastic jacket needs to be considered in the processing process besides the clamping and positioning of the workpiece, meanwhile, an auxiliary positioning ring or positioning plate needs to be arranged in the elastic jacket for integrally embedding the cylindrical thin-walled workpiece, and the longer the length of the petal-shaped structure of the elastic jacket is, the more difficult the precision control is. And when traditional chuck structure directly clamping, the clamp force is difficult to control, and does not have the buffering in the course of working, receives the cutter effect back, and moulding deformation takes place for the section of thick bamboo wall easily, can't do over again, makes machining efficiency descend, causes economic loss. Meanwhile, the wall of the cylinder is in danger of cracking, so that potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The present applicant provides a hexagonal chuck type turning attachment to elastically clamp a cylindrical thin-walled workpiece, and the attachment is simple and easy to operate and stable, in view of the above disadvantages in the prior art.

The utility model discloses the technical scheme who adopts as follows:

the utility model provides a hexagonal chuck formula turning attachment, which comprises a base, the last surface mounting joint subassembly of base, the joint subassembly is six claw snowflake column structures, each claw portion upper surface mounting of joint subassembly has the clamping jaw, be located the installation guide board on the joint subassembly between the clamping jaw, still include the bracing piece, the lower extreme of bracing piece and the upper surface rigid coupling of guide board, the upper end of bracing piece and the lower surface rigid coupling of lower locating plate, the upper surface of lower locating plate and the lower surface subsides of last locating plate connect, install the elastic pin subassembly on the lower locating plate, the upper end of elastic pin subassembly passes and stretches out the last locating plate.

The further technical scheme is as follows:

the base comprises a cylindrical base main body, a lathe connecting rod is vertically arranged in the middle of the lower surface of the base main body, and six limiting grooves with I-shaped cross sections are uniformly distributed on the upper surface of the base main body along the circumferential direction;

one end of each limiting groove is arranged on the periphery of the upper surface of the base main body, the other end of each limiting groove extends inwards along the radial direction of the base main body, and the six limiting grooves are communicated with the center of the upper surface of the base main body to form a reversed V-shaped combined groove;

the clamping assembly comprises a limiting block, the cross section of the limiting block is also in an I shape, the limiting block is inserted into a limiting groove corresponding to the limiting position, the end surface of the limiting block positioned on the inner side extends along the radial direction of the base main body to form a limiting flange, a first groove is formed in the upper surface of the limiting block along the radial direction of the base main body, and a group of first bosses are symmetrically arranged on two sides of the upper surface of the limiting block;

the clamping assembly further comprises a hexagonal plate, the straight edge of the hexagonal plate is opposite to each limiting block, the hexagonal plate and the base main body are coaxially arranged, the upper surface of a limiting flange of each limiting block is fixedly connected with the lower surface of the hexagonal plate, and a fastening screw penetrates through the center of the hexagonal plate and is screwed into the base main body to fix the clamping assembly on the base;

the specific structure of single clamping jaw is: the clamping jaw is of a block-shaped structure, the end face of the clamping jaw, which is positioned on the inner side, is sunken from two sides to the middle to form a clamping face matched with the radian of the outer wall of a workpiece, a second boss is arranged on the lower surface of the clamping jaw along the axial direction of the base main body, a second groove vertical to the second boss is formed in the middle of the lower surface of the clamping jaw, the second boss is matched with the first groove of the corresponding limiting block, and the second groove is matched with the first boss of the corresponding limiting block to enable the clamping jaw to be embedded in the;

the elastic pin assembly comprises a cap-shaped pin body, the cap-shaped pin body comprises a conical pin body and a plurality of spherical pin bodies, and the bottom of each cap-shaped pin body is fixedly connected with the lower positioning plate through a spring;

the workpiece to be processed is of a cylindrical thin-wall structure, a flange surface is arranged on the periphery of one end of an opening of the workpiece, a plurality of fixing holes are uniformly distributed on the flange surface, a notch is also formed in the periphery of one end of the opening of the workpiece, and a positioning mark for determining the position of the notch is arranged on the upper surface of an upper positioning plate;

the clamping jaw is characterized by further comprising a guide plate, the middle of the guide plate is a disc-shaped plate body, a through hole for a fastening screw to pass through is formed in the center of the disc-shaped plate body, a plurality of positioning columns are uniformly and vertically fixedly connected to the upper surface of the disc-shaped plate body along the circumferential direction, a plurality of positioning flanges are uniformly and uniformly distributed along the periphery of the disc-shaped plate body, the positioning flanges are of inverted triangular structures and are arranged between adjacent clamping jaws, an avoidance inclined plane matched with the positioning flanges in shape is further formed in the side walls of the clamping jaws, the lower surfaces of the positioning flanges are fixedly connected with the upper surface of the base;

the radius of the lower positioning plate is the same as that of the upper positioning plate, and the lower positioning plate, the upper positioning plate and the workpiece are all arranged coaxially with the base.

The utility model has the advantages as follows:

the utility model has reasonable structure and convenient operation, and can firmly clamp the cylinder workpiece by arranging the hexagonal chuck, and simultaneously, the elastic pin component is adopted to support the thin-wall characteristic of the workpiece, so that the workpiece can be accurately positioned in the clamping and processing processes and can be prevented from being damaged by large amount of impact; by the fixture, the upper end and the lower end of a thin-wall cylinder workpiece can be reliably positioned and clamped and cannot shake along with the vibration of a lathe spindle; the hexagonal chuck and the elastic pin assembly are compact in structure, and installation space is effectively saved.

The utility model discloses compare prior art and still have following advantage:

base, joint subassembly and clamping jaw's design: the hexagonal clamping chuck is used for forming the hexagonal clamping chuck, the H-shaped structure is stable in matching, not easy to loose, high in assembly precision and fixed through the hexagonal plates, limiting sliding is prevented, the arc surface matched with a workpiece is arranged on the inner end surface of the clamping jaw, although the clamping jaw is rigidly connected with the workpiece, the contact area of the clamping jaw and the workpiece is large, the surface of the workpiece cannot be damaged, and the defect that the elastic clamping sleeve deforms to influence machining is avoided;

the design of the elastic pin component of the utility model: the elastic pin assembly is used for positioning and damping in the process of clamping and processing a workpiece, the conical pin body in the elastic pin is used for positioning a reference hole of the workpiece, the round pin body is used for positioning other fixing holes of the workpiece, the conical structure is accurately positioned, and the spherical structure can be suitable for holes with relatively low precision requirements to prevent over-positioning;

guide board: the supporting rod is used for guiding the installation direction and position of the supporting rod, and meanwhile, the whole clamp structure is strengthened.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view a-a in fig. 2.

Fig. 4 is an exploded view of the overall structure of the present invention.

Fig. 5 is an enlarged view of the base structure of the present invention.

Fig. 6 is a partial exploded view of the clamping assembly of the present invention.

Fig. 7 is an enlarged view of the structure of the guide plate of the present invention.

Fig. 8 is an enlarged view of the clamping jaw structure of the present invention.

Fig. 9 is an enlarged view of the workpiece structure of the present invention.

Wherein: 1. a base; 2. a clamping assembly; 3. a guide plate; 4. a positioning column; 5. a clamping jaw; 6. a support bar; 7. a lower positioning plate; 8. a spring pin assembly; 9. an upper positioning plate; 10. a workpiece;

101. a lathe connecting rod; 102. a base body; 103. a limiting groove;

201. a hexagonal plate; 202. fastening screws; 203. a limiting block;

301. a positioning flange; 302. a guide hole; 303. a disc-shaped plate body; 304. a through hole;

501. a clamping surface; 502. avoiding the inclined plane; 503. a second groove; 504. a second boss;

801. a tapered pin body; 802. a spherical pin body; 803. a spring;

901. positioning a mark;

1001. a flange face; 1002. a notch; 1003. a fixing hole;

2031. a limiting flange; 2032. a first boss; 2033. a first groove.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-4, the utility model discloses a base 1, the last surface mounting joint subassembly 2 of base 1, joint subassembly 2 is six claw snowflake column structure, each claw surface mounting of joint subassembly 2 has clamping jaw 5, be located installation guide board 3 on the joint subassembly 2 between clamping jaw 5, still include bracing piece 6, the lower extreme of bracing piece 6 and the upper surface rigid coupling of guide board 3, the upper end of bracing piece 6 and the lower surface rigid coupling of bottom plate 7, the upper surface of bottom plate 7 and the lower surface laminating of top plate 9 connect, install elasticity round pin subassembly 8 on the bottom plate 7, the upper end of elasticity round pin subassembly 8 is passed and is stretched out top plate 9.

As shown in fig. 5, the base 1 includes a cylindrical base body 102, a lathe connecting rod 101 is vertically installed in the middle of the lower surface of the base body 102, and six limiting grooves 103 with i-shaped cross sections are uniformly distributed on the upper surface of the base body 102 along the circumferential direction. One end of each limiting groove 103 is arranged on the periphery of the upper surface of the base main body 102, the other end extends inwards along the radial direction of the base main body 102, and the six limiting grooves 103 are communicated with each other at the center of the upper surface of the base main body 102 to form a combined groove in the shape of a Chinese character 'x'. As shown in fig. 6, the clamping assembly 2 includes a limiting block 203, the cross section of the limiting block 203 is also in an "i" shape, the limiting block 203 is inserted into the limiting groove 103 corresponding to the position, the end surface of the limiting block 203 located at the inner side extends along the radial direction of the base main body 102 to form a limiting flange 2031, the upper surface of the limiting block 203 is provided with a first groove 2033 along the radial direction of the base main body 102, and two sides of the upper surface of the limiting block 203 are further symmetrically provided with a set of first bosses 2032. The clamping assembly 2 further comprises a hexagonal plate 201, straight edges of the hexagonal plate 201 are opposite to the limiting blocks 203, the hexagonal plate 201 and the base main body 102 are coaxially arranged, upper surfaces of limiting flanges 2031 of the limiting blocks 203 are fixedly connected with lower surfaces of the hexagonal plate 201 respectively, and fastening screws 202 penetrate through the center of the hexagonal plate 201 and are screwed into the base main body 102, so that the clamping assembly 2 is fixed on the base 1. As shown in fig. 8, the specific structure of the single clamping jaw 5 is as follows: the clamping jaw 5 is of a block structure, the end face of the clamping jaw 5 located on the inner side is recessed from two sides to the middle to form a clamping face 501 matched with the radian of the outer wall of the workpiece 10, a second boss 504 is axially arranged on the lower surface of the clamping jaw 5 along the base main body 102, a second groove 503 vertical to the second boss 504 is formed in the middle of the lower surface of the clamping jaw 5, the second boss 504 is matched with a first groove 2033 corresponding to the limiting block 203, and the second groove 503 is matched with a first boss 2032 corresponding to the limiting block 203 to enable the clamping jaw 5 to be embedded in the corresponding limiting block 203. The elastic pin assembly 8 comprises a cap-shaped pin body, the cap-shaped pin body comprises a conical pin body 801 and a plurality of spherical pin bodies 802, and the bottom of each cap-shaped pin body is fixedly connected with the lower positioning plate 7 through a spring 803. As shown in fig. 9, the machining fixture further includes a workpiece 10 to be machined, the workpiece 10 is a cylindrical thin-walled structure, a flange surface 1001 is arranged on the periphery of an opening end of the workpiece 10, a plurality of fixing holes 1003 are evenly distributed on the flange surface 1001, a notch 1002 is further arranged on the periphery of the opening end of the workpiece 10, and a positioning mark 901 for determining the position of the notch 1002 is arranged on the upper surface of the upper positioning plate 9. As shown in fig. 7, the device further includes a guide plate 3, the middle portion of the guide plate 3 is a disc-shaped plate 303, a through hole 304 through which the fastening screw 202 passes is formed in the center of the disc-shaped plate 303, a plurality of positioning columns 4 are uniformly and vertically fixedly connected to the upper surface of the disc-shaped plate 303 along the circumferential direction, a plurality of positioning flanges 301 are uniformly distributed along the periphery of the disc-shaped plate 303, the positioning flanges 301 are of an inverted triangle structure, the positioning flanges 301 are arranged between adjacent clamping jaws 5, an avoiding inclined plane 502 matched with the shape of the positioning flanges 301 is further formed on the side walls of the clamping jaws 5, the lower surface of the positioning flanges 301 is fixedly connected to the upper surface of the base main body 102, and guide holes 302. The radius of the lower positioning plate 7 is the same as that of the upper positioning plate 9, and the lower positioning plate 7, the upper positioning plate 9 and the workpiece 10 are all arranged coaxially with the base 1.

The utility model discloses a concrete working process as follows:

firstly, the assembly work of the clamp is completed, the limiting block 203 is inserted into the corresponding limiting groove 103, and the hexagonal plate 201 is fixedly connected with the limiting block 203 to form the integrated clamping assembly 2. The clamping jaw 5 is matched and fixed with the first boss 2032 and the first groove 2033 on the limiting block 203 through the second groove 503 and the second boss 504, and is fastened through screws, the guide plate 3, the support rod 6, the lower positioning plate 7, the elastic pin assembly 8 and the upper positioning plate 9 are sequentially connected to complete clamp assembly, and the clamp is connected with a lathe through a lathe connecting rod 101. The workpiece 10 is placed into a fixture, the bottom of the workpiece 10 is in contact with the positioning column 4, the fixing hole 1003 of the workpiece 10 is matched with the elastic pin assembly 8, the conical pin body 801 penetrates through the reference hole, the spherical pin body 802 penetrates through other holes, the position of the notch 1002 is opposite to the positioning mark 901, elastic clamping of the workpiece 10 is completed, and the inner circle of the workpiece 10 can be machined by starting a lathe.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides a hexagonal chuck formula turning attachment which characterized in that: including base (1), last surface mounting joint assembly (2) of base (1), joint assembly (2) are six claw snowflake column structures, each claw portion upper surface mounting of joint assembly (2) has clamping jaw (5), is located installation guide board (3) on joint assembly (2) between clamping jaw (5), still includes bracing piece (6), the lower extreme of bracing piece (6) and the upper surface rigid coupling of guide board (3), the upper end of bracing piece (6) and the lower surface rigid coupling of lower locating plate (7), the upper surface of lower locating plate (7) and the lower surface subsides of last locating plate (9) connect, install elasticity round pin subassembly (8) down on locating plate (7), the upper end of elasticity round pin subassembly (8) passes and stretches out locating plate (9).

2. The turret chuck type lathe fixture of claim 1, wherein: the base (1) comprises a cylindrical base main body (102), a lathe connecting rod (101) is vertically installed in the middle of the lower surface of the base main body (102), and six limiting grooves (103) with I-shaped cross sections are evenly distributed on the upper surface of the base main body (102) along the circumferential direction.

3. The turret chuck type lathe fixture of claim 2, wherein: one end of each limiting groove (103) is arranged on the periphery of the upper surface of the base main body (102), the other end of each limiting groove extends inwards along the radial direction of the base main body (102), and the six limiting grooves (103) are communicated with the center of the upper surface of the base main body (102) to form a reversed star-shaped combined groove.

4. The turret chuck type lathe fixture of claim 1, wherein: the clamping assembly (2) comprises a limiting block (203), the cross section of the limiting block (203) is also in an I shape, the limiting block (203) is inserted into a limiting groove (103) corresponding to the position, the end face of the limiting block (203) located on the inner side radially extends along the base main body (102) to form a limiting flange (2031), a first groove (2033) is formed in the upper surface of the limiting block (203) along the radial direction of the base main body (102), and a group of first bosses (2032) are symmetrically arranged on two sides of the upper surface of the limiting block (203).

5. The turret chuck type lathe fixture of claim 4, wherein: the clamping assembly (2) further comprises a hexagonal plate (201), the straight edge of the hexagonal plate (201) and each limiting block (203) are arranged oppositely, the hexagonal plate (201) and the base main body (102) are arranged coaxially, the upper surface of a limiting flange (2031) of each limiting block (203) is fixedly connected with the lower surface of the hexagonal plate (201) respectively, a fastening screw (202) penetrates through the center of the hexagonal plate (201) and is screwed into the base main body (102), and the clamping assembly (2) is fixed on the base (1).

6. The turret chuck type lathe fixture of claim 1, wherein: the specific structure of a single clamping jaw (5) is as follows: clamping jaw (5) are blocky structure, and clamping jaw (5) are located inboard terminal surface and are sunken to the centre from both sides, form clamping face (501) with work piece (10) outer wall radian looks adaptation, and the lower surface of clamping jaw (5) sets up second boss (504) along base main part (102) axial, and the lower surface middle part of clamping jaw (5) is seted up with second boss (504) vertically second recess (503), second boss (504) and first recess (2033) cooperation that corresponds stopper (203), second recess (503) and the cooperation of the first boss (2032) of corresponding stopper (203) make clamping jaw (5) scarf joint on stopper (203) that corresponds.

7. The turret chuck type lathe fixture of claim 1, wherein: the elastic pin assembly (8) comprises a cap-shaped pin body, the cap-shaped pin body comprises a conical pin body (801) and a plurality of spherical pin bodies (802), and the bottom of each cap-shaped pin body is fixedly connected with the lower positioning plate (7) through a spring (803).

8. The turret chuck type lathe fixture of claim 1, wherein: the machining fixture is characterized by further comprising a workpiece (10) to be machined, wherein the workpiece (10) is of a cylindrical thin-wall structure, a flange face (1001) is arranged on the periphery of one end, at the opening, of the workpiece (10), a plurality of fixing holes (1003) are uniformly distributed on the flange face (1001), a notch (1002) is further formed in the periphery of one end, at the opening, of the workpiece (10), and a positioning mark (901) used for determining the position of the notch (1002) is arranged on the upper surface of the upper positioning plate (9).

9. The turret chuck type lathe fixture of claim 1, wherein: still include guide board (3), the middle part of guide board (3) is disc plate body (303), through-hole (304) that supply fastening screw (202) to pass are seted up at the center of disc plate body (303), the upper surface of disc plate body (303) is along a plurality of reference columns (4) of the even perpendicular rigid coupling of circumference, along a plurality of location flange (301) of the periphery equipartition of disc plate body (303), location flange (301) are the structure of falling triangle-shaped, and location flange (301) set up between adjacent clamping jaw (5), still set up on the lateral wall of clamping jaw (5) with the inclined plane (502) of dodging of location flange (301) shape looks adaptation, the lower surface of location flange (301) and the upper surface rigid coupling of base main part (102), the bullport (302) that are used for rigid coupling bracing piece (6) are seted up in the middle part of location flange (.

10. The turret chuck type lathe fixture of claim 1, wherein: the radius of the lower positioning plate (7) is the same as that of the upper positioning plate (9), and the lower positioning plate (7), the upper positioning plate (9) and the workpiece (10) are all arranged coaxially with the base (1).