CN211387235U - Positioning and fixing device for milling teeth of differential case - Google Patents

Abstract

The utility model provides a location fixing device for differential mechanism shell mills tooth, it mainly comprises bottom plate, reference column, cushion, clamp plate, screw rod, locating block of taking the cap. The bottom plate is arranged in the small circular groove of bottom plate in reference column bottom, fix on the bottom plate through the screw rod, treat that the protruding ring platform in machined part bottom is arranged in the big circular groove of bottom plate, the cushion passes through the screw rod to be fixed on the bottom plate face, clamp plate one end is put on treating the face of machined part, the other end is put on the cushion face, the cap screw rod passes through the screw spiral connection that corresponds on "U" opening and the bottom plate of clamp plate, the lower extreme of locating piece is inserted in the straight flute of reference column, the card of upper portion both ends is in treating two inslots that the machined part. The positioning device has the advantages of accurate positioning and high precision of processed workpieces.

Description

Positioning and fixing device for milling teeth of differential case

The technical field is as follows: the utility model relates to a finish machining's of forging product auxiliary device of machining trade, especially a location fixing device that is used for differential mechanism shell to mill tooth.

Background art: the differential case is an automobile part and is used for a differential of an automobile. Its up end is 8 evenly distributed's tooth's socket, and after differential case blank was forged out, this 8 tooth's socket still need carry out the finish machining, just can guarantee the accuracy. The existing method for finish machining of the tooth grooves of the differential case is to position 2 symmetrical large grooves on the side surface of the differential case by using a rotary pressure plate and then perform tooth milling machining. The processing mode has the defects that an independent positioning device is arranged along the middle connecting line of the two large grooves, only one of the large grooves is positioned, the deviation of the positioning mode is large, the consistency of processed products is poor, the processing deviation is easy to occur, and the processing precision of 8 tooth sockets is influenced.

The invention content is as follows: an object of the utility model is to provide a location fixing device for differential mechanism shell mills tooth, it has the location accuracy, the advantage that the work piece precision of processing is high to the location inaccuracy that current differential mechanism shell exists when processing its upper end 8 tooth's sockets, the not enough of processing deviation appears easily.

Through the following technical scheme, the purpose of the utility model is realized, and the positioning and fixing device for milling teeth of a differential case is characterized by comprising a bottom plate, a positioning column, a cushion block, a pressing plate, a screw rod with a cap and a positioning block; the middle of the bottom plate is provided with two concentric circular grooves with different diameters, the diameter of the small circular groove is equal to that of the positioning column, the diameter of the large circular groove is equal to that of the convex circular ring platform at the bottom of the workpiece, the positioning column is a cylinder, the upper end surface of the positioning column is provided with a straight groove, the cushion block is a cuboid block, one end of the pressing plate is provided with a U-shaped opening, the screw rod with the cap is a screw rod with a circular pressing block, the positioning block is a T-shaped plate block, and the thickness of the positioning block is equal to the width of the straight groove; the bottom plate is arranged in the small circular groove of bottom plate in reference column bottom, fix on the bottom plate through the screw rod, treat that the protruding ring platform in machined part bottom is arranged in the big circular groove of bottom plate, the cushion passes through the screw rod to be fixed on the bottom plate face, clamp plate one end is put on treating the face of machined part, the other end is put on the cushion face, the cap screw rod passes through the screw spiral connection that corresponds on "U" opening and the bottom plate of clamp plate, the lower extreme of locating piece is inserted in the straight flute of reference column, the card of upper portion both ends is in treating two inslots that the machined part.

The utility model has the effects of, it has the location accuracy, the high advantage of the work piece precision of processing.

The invention is further elucidated below with reference to the accompanying drawings:

description of the drawings:

FIG. 1 is a schematic perspective view of the assembled workpiece to be machined according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic perspective view of a positioning post of the present invention;

FIG. 4 is a schematic perspective view of a positioning block of the present invention;

fig. 5 is a schematic view of the three-dimensional structure of the middle bottom plate of the present invention.

The specific implementation mode is as follows:

referring to the attached drawings 1, 2, 3, 4 and 5, the positioning and fixing device for milling teeth of a differential case mainly comprises a bottom plate 1, a positioning column 2, a cushion block 3, a pressure plate 4, a screw rod 5 with a cap and a positioning block 6. Two concentric circular grooves with different diameters are arranged in the middle of the bottom plate 1, the diameter of the small circular groove 11 is equal to that of the positioning column 2, and the diameter of the large circular groove 12 is equal to that of the convex circular ring table at the bottom of the workpiece 7 to be machined. The positioning column is a cylinder, and the upper end face is provided with a straight groove 2. The cushion block 3 is a cuboid block. One end of the pressing plate 4 is provided with a U-shaped opening. The positioning block 6 is a T-shaped plate, and the thickness of the positioning block is equal to the width of the straight groove on the upper end face of the positioning column 2. The bottom end of the positioning column 2 is arranged in the small circular groove 11 of the bottom plate and is fixed on the bottom plate 1 through a screw rod. The convex circular platform at the bottom of the workpiece 7 to be processed is arranged in the large circular groove 12 of the bottom plate 1. The cushion blocks 3 are symmetrically fixed on the surface of the bottom plate 1 through screws. One end of the pressing plate 4 is placed on the surface of the workpiece 7 to be machined, the other end of the pressing plate is placed on the surface of the cushion block 3, and the screw rod 5 with the cap is in threaded connection with the corresponding screw hole on the bottom plate 1 through the U-shaped opening of the pressing plate 4. The lower end of the positioning block 6 is inserted into the straight groove of the positioning column 1, and the two ends of the upper part of the positioning block are clamped in the two grooves opposite to the workpiece 7 to be machined.

The operation flow is as follows: placing a convex circular ring platform at the bottom of a to-be-machined part 7 (a differential case) in a large circular groove 12 on the upper surface of a bottom plate 1, enabling a pair of tooth sockets at the upper end of the to-be-machined part 7 to be approximately in a straight line with a groove at the upper end of a positioning column 2, clamping a positioning block 6, and enabling the lower end of the positioning block 6 to be in contact with a straight groove on the upper surface of the positioning column 2; two ends of the upper part of the positioning block 6 are contacted with the tooth socket of the workpiece 7 to be processed; and (3) pressing the positioning block 6 by hand, placing one end of the 2 pressing plates 4 on the cushion block 3, placing the other end of the 2 pressing plates on the surface of the circular table of the workpiece to be machined 7, penetrating the screw rod 5 with the cap through the U-shaped opening of the pressing plate 4, screwing the 2 screw rods 5 with the cap by a wrench, taking away the positioning block, starting the numerically controlled lathe, and starting machining operation. After the processing is finished, the screw rod 5 with the cap and the pressing plate 4 are unscrewed 2 by a hand, the workpiece 7 to be processed is taken out, and the process is repeated to process the next workpiece 7 to be processed.

Claims (1)

1. A positioning and fixing device for milling teeth of a differential case is characterized by comprising a bottom plate, a positioning column, a cushion block, a pressure plate, a screw rod with a cap and a positioning block; the middle of the bottom plate is provided with two concentric circular grooves with different diameters, the diameter of the small circular groove is equal to that of the positioning column, the diameter of the large circular groove is equal to that of the convex circular ring platform at the bottom of the workpiece, the positioning column is a cylinder, the upper end surface of the positioning column is provided with a straight groove, the cushion block is a cuboid block, one end of the pressing plate is provided with a U-shaped opening, the screw rod with the cap is a screw rod with a circular pressing block, the positioning block is a T-shaped plate block, and the thickness of the positioning block is equal to the width of the straight groove; the bottom plate is arranged in the small circular groove of bottom plate in reference column bottom, fix on the bottom plate through the screw rod, treat that the protruding ring platform in machined part bottom is arranged in the big circular groove of bottom plate, the cushion passes through the screw rod to be fixed on the bottom plate face, clamp plate one end is put on treating the face of machined part, the other end is put on the cushion face, the cap screw rod passes through the screw spiral connection that corresponds on "U" opening and the bottom plate of clamp plate, the lower extreme of locating piece is inserted in the straight flute of reference column, the card of upper portion both ends is in treating two inslots that the machined part.

Images