CN217019480U

CN217019480U - Milling machine fixture for machining crankshaft key groove

Info

Publication number: CN217019480U
Application number: CN202220625655.8U
Authority: CN
Inventors: 刘耿亮; 袁荣飞; 余秀琴
Original assignee: Jiangxi Gas Compressor Co ltd
Current assignee: Jiangxi Gas Compressor Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-22
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a milling machine fixture for machining a crankshaft key groove, which comprises a fixture body, a T-shaped bolt, a fixture body, a positioning block, a support rod, a pressing plate, a pull rod and the like. The device can mill the crankshaft with the key slot on a common milling machine, effectively improves the machining precision of the size of the key slot, the surface roughness and the form and position tolerance, has simple structure, is easy to clamp and manufacture, and can meet the key slot machining requirements of crankshafts with other external dimensions by adjusting the position of the pull rod in the pressure plate slot and changing the length of the stay rod.

Description

Milling machine fixture for machining crankshaft key groove

Technical Field

The utility model relates to a milling machine part, in particular to a milling machine fixture for machining a crankshaft keyway.

Background

With the continuous development of science and technology, in modern industry, various machining workpieces emerge endlessly, and are suitable for the development of different fields. At present, a milling machine or a machining center is needed for machining a key groove on a crankshaft, but for crankshafts with irregular shapes and huge appearances, the crankshafts cannot be clamped on the milling machine or the machining center, if the requirement on the roughness of the key groove is high, Ra1.6 is achieved, and when the requirement on the symmetry degree of the axis line of the key groove to the axis center line of a shaft system is high, the requirement on machining cannot be met by simple clamping.

Disclosure of Invention

The utility model aims to provide a milling machine fixture for machining a crankshaft keyway.

The purpose of the utility model is realized by the following steps:

the utility model provides a milling machine fixture of processing bent axle keyway which characterized in that: the clamp comprises a clamp body, wherein U-shaped grooves with outward openings are formed in fixing wing plates on the left side and the right side of the clamp body, two T-shaped bolts penetrate through the U-shaped grooves from bottom to top on the left side and the right side of the clamp body respectively to fix the clamp body on a milling machine workbench, a positioning hole with a downward opening is formed in the middle of each of the left side, the middle side and the right side of the bottom of the clamp body, and an internal thread is formed in the inner wall of the positioning hole; a positioning block with a round hole in the middle is arranged at the opening of each positioning hole, a screw penetrates through the positioning block from bottom to top and is screwed into the positioning hole, positioning grooves corresponding to the positioning holes of the fixture body in position and quantity are arranged on the milling machine workbench, and the positioning block is embedded into the positioning grooves to position the fixture body on the workbench; the rear ends of the left side and the right side of the upper surface of the clamp body are respectively provided with a pair of V-shaped bases which are opened upwards and are completely the same, and the shaft handles at the two ends of the crankshaft are respectively placed on the two V-shaped bases; a pair of identical strut seats are respectively arranged at the front ends of the left side and the right side of the clamp body, each strut seat is provided with a strut groove which is opened forwards and used for placing a strut, a transverse plate of each strut groove is provided with a pull rod fixing hole, a pull rod groove used for placing a pull rod is formed between the transverse plate of each strut groove and a front side plate of the V-shaped base, the middle of the front side plate of the V-shaped base is provided with a light hole and a pull rod hole which is on the same straight line with the pull rod fixing hole, and a pull rod round pin sequentially penetrates through the pull rod fixing hole in the transverse plate and the round hole at the bottom end of the pull rod from front to back and then is screwed into the pull rod screw hole of the front side plate to fix the pull rod in the pull rod groove; a stay bar fixing hole which is in the same straight line and is through is arranged on the left side plate of the stay bar seat, a stay bar screw hole which is in the same straight line with the stay bar fixing hole and is internally threaded is arranged on the right side plate, which is opposite to the left side plate, of the stay bar seat, a stay bar round pin sequentially penetrates through the stay bar fixing hole on the left side plate and a round hole at the bottom end of the stay bar from left to right and then is screwed into the stay bar screw hole on the right side plate, and the stay bar is vertically fixed in a stay bar groove; the outer side wall of the top end of the pull rod is provided with a pull rod external thread, a pressing plate groove is formed in the middle of the pressing plate, the rear end of the pressing plate is pressed on a shaft handle of the crankshaft, the front end of the pressing plate is pressed on the top end of the support rod, the top end of the pull rod penetrates upwards through the pressing plate groove of the pressing plate and then fixes the pressing plate on the pull rod through a gasket and a nut, and the pressing plate presses the crankshaft and the support rod to prevent the crankshaft from rotating.

Furthermore, the pressing plate groove in the middle of the pressing plate is a waist-shaped groove, the pull rod can be adjusted in the waist-shaped groove of the pressing plate, and the length of the stay bar can be changed when the pull rod is used for crankshafts of other types.

The utility model firstly positions and corrects the position through the positioning block, fixes the positioning block on the workbench through the T-shaped bolt and the U-shaped groove, places the workpiece on the V-shaped base, completes all clamping through the combination of the pull rod, the pressing plate, the stay rod, the pull rod round pin and the stay rod round pin, and performs normal processing.

The device can mill the crankshaft with the key slot on a common milling machine, effectively improves the machining precision, the surface roughness and the form and position tolerance of the size of the key slot, has simple structure, is easy to clamp and manufacture, and can meet the key slot machining requirements of crankshafts with other overall sizes by adjusting the position of the pull rod in the pressure plate slot and changing the length of the stay rod.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a front view of the clamp body;

FIG. 4 is a top view of the clamp body;

FIG. 5 is a left side view of the clamp body;

FIG. 6 is a perspective view of the clamp body;

figure 7 is a perspective view of the present invention in an integral clamp.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings.

A milling machine fixture for machining a crankshaft key groove comprises a fixture body 2, wherein U-shaped grooves 202 with outward openings are formed in fixing wing plates 201 on the left side and the right side of the fixture body 2, two T-shaped bolts 1 penetrate through the U-shaped grooves 202 from bottom to top on the left side and the right side of the fixture body 2 respectively to fix the fixture body 2 on a milling machine workbench 9, a positioning hole 203 with a downward opening and an internal thread is formed in the middle of each of the left side, the middle side and the right side of the bottom of the fixture body 2; a positioning block 5 with a circular hole in the middle is arranged at the opening of each positioning hole 203, screws 6 penetrate through the positioning block 5 from bottom to top and are screwed into the positioning holes 203, positioning grooves 901 corresponding to the positions and the number of the positioning holes 203 of the clamp body 2 are arranged on the milling machine workbench 9, and the positioning blocks 6 are embedded into the positioning grooves 901 to position the clamp body 2 on the workbench 9; a pair of V-shaped bases 204 which are opened upwards and are completely the same are respectively arranged at the rear ends of the left side and the right side of the upper surface of the fixture body 2, and shaft handles 301 at two ends of the crankshaft 3 are respectively arranged on the two V-shaped bases 204; a pair of identical strut seats 205 are respectively arranged at the front ends of the left side and the right side of the upper surface of the clamp body 2, a strut groove 206 which is opened forwards and used for placing a strut 11 is arranged on each strut seat 205, a strut fixing hole 211 is arranged on a transverse plate 208 of each strut groove 206, a strut groove 213 used for placing a strut 13 is formed between the transverse plate 208 of each strut groove 206 and a front side plate 212 of the V-shaped base 204, a strut hole 214 which is provided with a light hole and is in the same line with the strut fixing hole 211 is arranged in the middle of the front side plate 212 of the V-shaped base 204, a strut round pin 10 sequentially penetrates through the strut fixing hole 211 on the transverse plate 208 and the round hole at the bottom end of the strut 13 from front to back and then is installed in the strut hole 214 of the front side plate 212, and the strut 13 is fixed in the strut groove 213; a stay bar fixing hole 207 which is in the same straight line and is penetrated is arranged on a left side plate 209 of the stay bar seat 205, a stay bar hole 215 which is in the same straight line with the stay bar fixing hole 207 is arranged on a right side plate 210 which is opposite to the left side plate 209 on the stay bar seat 205, a stay bar round pin 4 sequentially penetrates through the stay bar fixing hole 207 on the left side plate 209 and a round hole at the bottom end of a stay bar 13 from left to right and then is loaded into the stay bar hole 215 on the right side plate 210, and the stay bar 13 is vertically fixed in a stay bar groove 206; the outer side wall of the top end of the pull rod 13 is provided with a pull rod external thread 216, the middle of the pressure plate 12 is provided with a pressure plate groove 121, the rear end of the pressure plate 12 is pressed on a shaft handle 301 of the crankshaft 3, the front end of the pressure plate 12 is pressed on the top end of the support rod 11, the top end of the pull rod 13 upwards penetrates through the pressure plate groove 121 of the pressure plate 12 and then fixes the pressure plate 12 on the pull rod 13 through a gasket 15 and a nut 14, and the pressure plate 12 tightly presses the crankshaft 3 and the support rod 11 to prevent the crankshaft 3 from rotating.

The pressure plate groove 121 in the middle of the pressure plate 12 is a waist-shaped groove, and the pull rod 13 can be adjusted in the pressure plate groove 121 of the pressure plate 12, and the length of the stay bar 11 can be changed when the pressure plate is used for other types of crankshafts.

The working principle is as follows: the crankshaft 3 is placed on a V-shaped base 204 of the clamp body 2, a nut 7 and a bolt 8 are installed at the right end of a milling machine workbench 9 to perform limiting adjustment on the crankshaft 3, after adjustment is completed, a T-shaped bolt 1 is installed in a T-shaped groove of the milling machine workbench 9 through U-shaped grooves 202 on two sides of the clamp body 2 to fasten the clamp body 2, two support rods 11 and pull rods 13 on two sides of the clamp body 2 are respectively installed in a support rod seat 205 of the clamp body 2 through support rod round pins 4 and pull rod round pins 10, the top ends of the two pull rods 13 are installed in a pressure plate groove 121 of a pressure plate 12, the rear ends of the two pressure plates 12 are respectively arranged on shaft handles 301 on two ends of the crankshaft 3, the front ends of the two pressure plates 12 are combined with the support rods 11 to form a vertical relation, and the pull rods 13 are fastened through gaskets 15 and the nut 14 to achieve a clamping effect.

Claims

1. The utility model provides a milling machine fixture of processing bent axle keyway which characterized in that: the clamp comprises a clamp body, wherein U-shaped grooves with outward openings are formed in fixing wing plates on the left side and the right side of the clamp body, two T-shaped bolts respectively penetrate through the U-shaped grooves from bottom to top on the left side and the right side of the clamp body and then fix the clamp body on a milling machine workbench, a positioning hole with a downward opening is formed in the middle of each of the left side, the middle side and the right side of the bottom of the clamp body, and an internal thread is formed in the inner wall of the positioning hole; a positioning block with a round hole in the middle is arranged at the opening of each positioning hole, a screw penetrates through the positioning block from bottom to top and is screwed into the positioning hole, positioning grooves corresponding to the positioning holes of the fixture body in position and quantity are arranged on the milling machine workbench, and the positioning block is embedded into the positioning grooves to position the fixture body on the workbench; the rear ends of the left side and the right side of the upper surface of the clamp body are respectively provided with a pair of V-shaped bases which are opened upwards and are completely the same, and the shaft handles at the two ends of the crankshaft are respectively placed on the two V-shaped bases; a pair of identical strut seats are respectively arranged at the front ends of the left side and the right side of the upper surface of the fixture body, each strut seat is provided with a strut groove which is opened forwards and used for placing a strut, a transverse plate of each strut groove is provided with a pull rod fixing hole, a pull rod groove used for placing a pull rod is formed between the transverse plate of each strut groove and a front side plate of the V-shaped base, the middle of the front side plate of the V-shaped base is provided with a light hole and a pull rod hole which is in the same straight line with the pull rod fixing hole, and a pull rod round pin sequentially penetrates through the pull rod fixing hole on the transverse plate and a round hole at the bottom end of the pull rod from front to back and then is screwed into the pull rod screw hole of the front side plate to fix the pull rod in the pull rod groove; a stay bar fixing hole which is in the same straight line and is through is arranged on the left side plate of the stay bar seat, a stay bar screw hole which is in the same straight line with the stay bar fixing hole and is internally threaded is arranged on the right side plate, which is opposite to the left side plate, of the stay bar seat, a stay bar round pin sequentially penetrates through the stay bar fixing hole on the left side plate and the round hole at the bottom end of the stay bar from left to right and then is screwed into the stay bar screw hole on the right side plate, and the stay bar is vertically fixed in the stay bar groove; the outer side wall of the top end of the pull rod is provided with a pull rod external thread, a pressing plate groove is formed in the middle of the pressing plate, the rear end of the pressing plate is pressed on a shaft handle of the crankshaft, the front end of the pressing plate is pressed on the top end of the support rod, the top end of the pull rod penetrates through the pressing plate groove of the pressing plate upwards and then fixes the pressing plate on the pull rod through a gasket and a nut together, and the pressing plate presses the crankshaft and the support rod to prevent the crankshaft from rotating.

2. The milling machine jig for working a crank key groove as set forth in claim 1, wherein: the pressing plate groove in the middle of the pressing plate is a waist-shaped groove.