CN211728401U

CN211728401U - Fixing device for processing bit leg shaft neck

Info

Publication number: CN211728401U
Application number: CN202020340544.3U
Authority: CN
Inventors: 黄敏
Original assignee: Suzhou Selecos Tools Co ltd
Current assignee: Suzhou Selecos Tools Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-23
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a fixing device for processing a bit leg shaft neck, which comprises a chuck, a positioning plate, a clamping jaw, a positioning block, a pressing arm seat and a pressing arm; a positioning plate is arranged on the chuck; the two sides of the positioning plate are provided with claws moving towards the center; the side surface opposite to the clamping jaw is provided with a clamping jaw positioning pin; a positioning block is arranged on the central line of the positioning plate on one side of the side vertical surface of the clamping jaw; a radial positioning pin is arranged on the positioning block; one side of the positioning block is provided with a pressure arm seat; the top end of the arm pressing seat is provided with a pressing arm extending to the positioning block; the pressure arm is hinged with the top end of the pressure arm seat, and the pressure arm rotates around the pressure arm seat; the pressure arm is provided with a locking structure to fix the pressure arm and the pressure arm seat. The structure design of the device is reasonable, the processing difficulty is reduced, the repeated positioning precision of the workpiece is high by virtue of the self-centering function of the chuck, and the production quality can be improved; the operation is simple, the replacement is quick, and the debugging time is shortened; the accessories are replaceable and are suitable for products with different sizes; the product processing and debugging difficulty is low, and the production efficiency is improved.

Description

Fixing device for processing bit leg shaft neck

Technical Field

The utility model relates to a fixing device for processing gripper jaw axle journal.

Background

The bit leg is a main part on the roller bit, and the shape is extremely irregular, so that the bit leg is fixed on processing equipment by adopting a special clamp when a shaft neck is processed. The clamp that adopts at present adopts the locate mode of a round pin in two sides more, and the clamp design is more complicated, and part quantity is many, in order to cooperate the palm of different specifications, need change the V type piece and the compact heap of different specifications, and the V type piece design is complicated, and the compact heap on the compact heap is easy to split, produces the potential safety hazard, and the retooling operation time is long in addition, especially in the degree of difficulty of product processing debugging higher, requires that operating personnel have comparatively abundant experience.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the fixing device is used for machining the bit leg shaft neck, is low in machining and debugging difficulty, simple to operate, quick to replace and suitable for products of various sizes.

The technical scheme of the utility model is that: a fixing device for processing a bit leg shaft neck comprises a chuck, a positioning plate, a clamping jaw, a positioning block, a pressing arm seat and a pressing arm; a positioning plate is arranged on the chuck; the two sides of the positioning plate are provided with clamping jaws moving towards the center; the side surface opposite to the clamping jaw is provided with a clamping jaw positioning pin; a positioning block is arranged on the central line of the positioning plate on one side of the side vertical surface of the clamping jaw; a radial positioning pin is arranged on the positioning block; one side of the positioning block is provided with a pressing arm seat; the top end of the arm pressing seat is provided with a pressing arm extending to the positioning block; the pressure arm is hinged with the top end of the pressure arm seat, and the pressure arm rotates around the pressure arm seat; and the pressure arm is provided with a locking structure for fixing the pressure arm and the pressure arm seat.

Preferably, the pin head of the jaw positioning pin is a quincuncial centre; the center of the quincuncial center is a concave plane lower than the center bulge.

Preferably, the locking structure is that a pressure arm screw is arranged on the pressure arm, and the pressure arm screw penetrates through the pressure arm and is fixedly connected with a screw hole of the pressure arm seat.

Preferably, the arm pressing seat is movably connected with the positioning plate.

Preferably, a wedge-shaped pressing block is arranged on the positioning block on one side close to the center of the positioning plate; the positioning block is movably connected with the positioning plate through a wedge-shaped pressing block.

Preferably, a balancing weight is arranged on the chuck.

Preferably, the chuck is a hydraulic double jaw chuck.

Preferably, the clamping jaws are symmetrically arranged on two sides of the positioning plate.

The utility model has the advantages that:

1. the structure is reasonable in design, the processing difficulty is reduced, the tightness is good, the stability is high, and the production quality can be improved;

2. by means of the chuck self-centering function, the repeated clamping and positioning precision of the workpiece is high;

3. the operation is simple, the replacement is quick, and the debugging time is shortened;

4. the accessories are replaceable, the device is suitable for products with different sizes, and the application range is wide;

5. the product processing and debugging difficulty is low, and the production efficiency is improved;

6. the position of the gripper jaw is fastened, so that the on-line measurement is convenient during the gripper jaw machining.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a schematic front view of a fixing device for machining a bit leg journal according to the present disclosure;

FIG. 2 is a left side view of the fixing device for processing a bit leg shaft neck according to the present disclosure;

FIG. 3 is a schematic top view of a fixing device for machining a bit leg journal according to the present disclosure;

FIG. 4 is a schematic perspective view of a jaw positioning pin of the fixing device for processing a bit leg journal according to the present disclosure;

FIG. 5 is a schematic front view of a fixing device for processing a bit leg shaft neck according to the present disclosure;

FIG. 6 is a schematic top view of a fixing device for processing a bit leg shaft neck according to the present disclosure

Wherein: 1. a chuck; 2. positioning a plate; 3. a claw; 4. positioning blocks; 5. a arm pressing seat; 6. pressing the arm; 7. a jaw positioning pin; 8. a radial positioning pin; 9. a balancing weight; 10. a bit leg; 41. a wedge-shaped compaction block; 51. a pin; 61. a pressure arm bolt; 71. a concave plane; 72. the tip is raised.

Detailed Description

The first embodiment is as follows:

as shown in fig. 1-6, a fixing device for processing a bit leg shaft neck comprises a chuck 1, a positioning plate 2, a claw 3, a positioning block 4, a pressure arm seat 5 and a pressure arm 6; the chuck 1 is provided with a positioning plate 2; the chuck 1 is a hydraulic double-jaw chuck; a pair of clamping jaws 3 moving towards the center are arranged on two sides of the positioning plate 2, and the clamping jaws 3 are symmetrically arranged on two sides of the positioning plate 2; a jaw positioning pin 7 is arranged on the opposite side surface of the jaw 3; the pin head of the jaw positioning pin 7 is a quincuncial centre; the center of the plum blossom center is a concave plane 71 lower than a center bulge 72; a positioning block 4 is arranged on the central line of the positioning plate 2 on one side of the side vertical surface of the clamping jaw 3; a radial positioning pin 8 is arranged on the positioning block 4; the positioning block 4 is provided with a wedge-shaped pressing block 41, and the positioning block 4 is fixed with the positioning plate 2 through the wedge-shaped pressing block 41 by bolts; a pressing arm seat 5 is arranged on one side of the positioning block 4; the top end of the arm pressing seat 5 is provided with a pressing arm 6 extending to the positioning block 4; the pressure arm 6 is hinged with the top end of the pressure arm seat 5, in the embodiment, a pin 51 is adopted for connection, and the pressure arm 6 rotates around the pressure arm seat 5; the pressure arm 5 is provided with a locking structure for fixing the pressure arm and the pressure arm seat; the locking structure is characterized in that a pressure arm screw 61 is arranged on a pressure arm, and the pressure arm screw 61 penetrates through a pressure arm 6 to be connected and fixed with a screw hole of a pressure arm seat 5; the arm pressing seat 5 and the positioning plate 2 are fixed by bolts; and a balancing weight 9 is arranged on the chuck 1.

Milling a positioning plane at the shoulder of the back of the bit leg 10, drilling a radial positioning hole with the depth of 5mm, and processing side positioning holes with the depth of 2-3mm on two side surfaces of a bit leg shaft neck. The positioning plane of the bit leg is placed on the positioning block 4, the radial positioning hole of the bit leg 10 is matched and positioned with the radial positioning pin 8 on the positioning block 4 to realize radial and axial positioning, the jaw 3 is matched with the hydraulic double-jaw chuck to clamp towards the center, and the top bulge 72 of the quincunx tip of the jaw positioning pin 7 is matched and positioned with the side positioning holes at two sides of the bit leg shaft neck and clamps the bit leg. The claw and the three positioning pins are used for positioning and clamping the bit leg 10, the pressing arm 6 is pressed downwards, the pressing arm 6 is locked by the pressing arm screw 61, at the moment, the pressing arm 6 presses the tail part of the bit leg 10 to prevent the tail part from tilting and moving, the pressing arm 6 is pressed at the position of a surface intersection line with an included angle of 120 degrees of the bit leg 10 to completely fix the bit leg 10, the assembling and disassembling are simple and rapid, and the efficiency is high. To the fixed not unidimensional product, only need change locating piece 4, press arm seat 5 and balancing weight 9 can, these three accessories are all through bolt swing joint, change convenient and fast. The head of the jaw positioning pin 7 is designed into a quincuncial tip, eight tip protrusions are arranged on the tip protrusions and are 1.2mm high, the preorder process difficulty can be reduced, and the diameter of the jaw positioning hole can be 2mm larger than that of the jaw positioning pin. When a workpiece is clamped, the quincunx center is slowly embedded into the bottom plane of the side positioning hole under the action of huge clamping force of the chuck, and the workpiece is positioned until the end faces of the two jaw positioning pins are tightly attached to the bottom plane of the side positioning hole. The reasonable fastening nature of project organization of present case is good, and stability is high, and loading and unloading are convenient, are suitable for multiple size product, easy operation, and the processing debugging degree of difficulty is low, and double-jaw hydraulic chuck is from centering, and repeated clamping positional stability is high, and on-line measurement is convenient, can effectively improve production efficiency and production quality.

Example two:

as shown in fig. 1-3 and 5-6, a fixing device for processing a bit leg shaft neck comprises a chuck 1, a positioning plate 2, a clamping jaw 3, a positioning block 4, a pressure arm seat 5 and a pressure arm 6; the chuck 1 is provided with a positioning plate 2; the chuck 1 is a hydraulic double-jaw chuck; a pair of clamping jaws 3 moving towards the center are arranged on two sides of the positioning plate 2, and the clamping jaws 3 are symmetrically arranged on two sides of the positioning plate 2; a jaw positioning pin 7 is arranged on the side surface opposite to the jaw 3, and the top of the jaw positioning pin 7 is flat; a positioning block 4 is arranged on the central line of the positioning plate 2 on one side of the side vertical surface of the clamping jaw 3; a radial positioning pin 8 is arranged on the positioning block 4; the positioning block 4 is provided with a wedge-shaped pressing block 41, and the positioning block 4 is fixed with the positioning plate 2 through the wedge-shaped pressing block 41 by bolts; a pressing arm seat 5 is arranged on one side of the positioning block 4; the top end of the arm pressing seat 5 is provided with a pressing arm 6 extending to the positioning block 4; the pressure arm 6 is hinged with the top end of the pressure arm seat 5, in the embodiment, a pin 51 is adopted for connection, and the pressure arm 6 rotates around the pressure arm seat 5; the pressure arm 5 is provided with a locking structure for fixing the pressure arm and the pressure arm seat; the locking structure is characterized in that a pressure arm screw 61 is arranged on a pressure arm, and the pressure arm screw 61 penetrates through a pressure arm 6 to be connected and fixed with a screw hole of a pressure arm seat 5; the arm pressing seat 5 and the positioning plate 2 are fixed by bolts; and a balancing weight 9 is arranged on the chuck 1.

The method is characterized in that a support positioning hole is drilled at a 10-shoulder position of a bit leg, the depth is 5mm, the bottom plane of the support positioning hole is used as a positioning plane, circumferential positioning on a vertical plane is achieved, the process step of milling a positioning plane before clamping is reduced, side positioning holes are machined on two side faces of a bit leg shaft neck, the depth is 3-4 mm, and the diameter ratio of the side positioning holes to a claw positioning pin is 0.01-0.02 mm. When a workpiece is clamped, the supporting positioning holes of the bit leg 10 are matched and positioned with the radial positioning pins 8 on the positioning blocks 4, the clamping jaws 3 are matched with the hydraulic double-jaw chuck to clamp towards the center, and the clamping jaw positioning pins 7 are matched and positioned with the side positioning holes on two sides of the journal of the bit leg to clamp the bit leg, so that radial and axial positioning is realized. The claw and the three positioning pins are used for positioning and clamping the bit leg 10, the pressing arm 6 is pressed downwards, the pressing arm 6 is locked by the pressing arm screw 61, at the moment, the pressing arm 6 presses the tail part of the bit leg 10 to prevent the tail part from tilting and moving, the pressing arm 6 is pressed at the position of a surface intersection line with an included angle of 120 degrees of the bit leg 10 to completely fix the bit leg 10, the assembling and disassembling are simple and rapid, and the efficiency is high. To the fixed not unidimensional product, only need change locating piece 4, press arm seat 5 and balancing weight 9 can, these three accessories are all through bolt swing joint, change convenient and fast. The end face of the jaw positioning pin is smooth, the matching surface of the jaw positioning pin and the side positioning hole bears the axial stress of a workpiece in the machining process, and the positioning precision and the positioning reliability depend on the clearance between the jaw positioning pin and the side positioning hole. The reasonable fastening nature of project organization of present case is good, and stability is high, and loading and unloading are convenient, are suitable for multiple size product, easy operation, and the processing debugging degree of difficulty is low, and double-jaw hydraulic chuck is from centering, and repeated clamping positional stability is high, and on-line measurement is convenient, can effectively improve production efficiency and production quality.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.

Claims

1. A fixing device for processing a bit leg shaft neck is characterized in that: the clamping device comprises a chuck, a positioning plate, clamping jaws, a positioning block, a pressing arm seat and a pressing arm; a positioning plate is arranged on the chuck; the two sides of the positioning plate are provided with clamping jaws moving towards the center; the side surface opposite to the clamping jaw is provided with a clamping jaw positioning pin; a positioning block is arranged on the central line of the positioning plate on one side of the side vertical surface of the clamping jaw; a radial positioning pin is arranged on the positioning block; one side of the positioning block is provided with a pressing arm seat; the top end of the arm pressing seat is provided with a pressing arm extending to the positioning block; the pressure arm is hinged with the top end of the pressure arm seat, and the pressure arm rotates around the pressure arm seat; and the pressure arm is provided with a locking structure for fixing the pressure arm and the pressure arm seat.

2. The fixture for machining a bit leg journal as set forth in claim 1, wherein: the pin head of the jaw positioning pin is a quincuncial centre; the center of the quincuncial center is a concave plane lower than the center bulge.

3. The fixture for machining a bit leg journal as set forth in claim 1, wherein: the locking structure is characterized in that a pressure arm screw is arranged on the pressure arm and penetrates through the pressure arm to be connected and fixed with a screw hole of the pressure arm seat.

4. The fixture for machining a bit leg journal as set forth in claim 1, wherein: the arm pressing seat is movably connected with the positioning plate.

5. The fixture for machining a bit leg journal as set forth in claim 1, wherein: a wedge-shaped pressing block is arranged on the positioning block on one side close to the center of the positioning plate; the positioning block is movably connected with the positioning plate through a wedge-shaped pressing block.

6. The fixture for machining a bit leg journal as set forth in claim 1, wherein: and a balancing weight is arranged on the chuck.

7. The fixture for machining a bit leg journal as set forth in claim 1, wherein: the chuck is a hydraulic double-jaw chuck.

8. The fixture for machining a bit leg journal as set forth in claim 1, wherein: the clamping jaws are symmetrically arranged on two sides of the positioning plate.