CN107755726A - Suitable for the swelling fixture of cover parts - Google Patents

Abstract

The invention discloses an expansion fixture suitable for sleeve parts. The lathe pull rod slides along the rotation axis relative to the lathe rotary body; one end of the middle pull rod is fixed to the lathe pull rod; the active pull rod shaft is fixed to the other end of the middle pull rod; The mandrel is fixed to the rotating body of the lathe; the expansion mandrel is sleeved on the outer periphery of the active tie rod shaft; the expansion mandrel forms an expansion base; in the direction of the rotation axis, the position of the movable expansion member corresponds to the expansion base; The expansion base is formed with an expansion hole that runs through the expansion mandrel in the radial direction of the rotation axis; the movable expansion part is formed with a slant block; the slant block passes through the expansion hole and extends into the interior of the expansion mandrel; the active pull rod shaft A spherical portion is formed at one end of the shaft; in the direction of the axis of rotation, the spherical portion corresponds to the position of the inclined block; the rubber ring is sleeved on the outer periphery of the movable expansion member and the expansion mandrel. The expansion fixture suitable for sleeve parts disclosed by the invention can realize automatic expansion and has high clamping stability.

Description

Expanding fixtures for sleeve parts

technical field

The invention relates to an expansion fixture suitable for sleeve parts.

Background technique

The clamping mechanism usually used in traditional CNC lathe parts is a three-jaw clamping mechanism. The lathe pull rod of the lathe drives the three-jaw clamping mechanism to clamp the parts.

When the traditional CNC lathe clamps the sleeve parts, it uses the jaws to clamp the sleeve parts from the outer surface. The jaws block a part of the outer surface of the sleeve parts, which affects the processing of this part. It is necessary to repeat the clamping many times to realize the processing of the complete surface, and the repeated clamping also causes the reduction of the machining accuracy.

Contents of the invention

In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide an expansion fixture suitable for sleeve parts, which can realize automatic expansion and has high clamping stability.

An expansion fixture suitable for sleeve parts, characterized in that it includes: a lathe connection plate, a lathe rotary body defined with a rotary axis, a lathe tie rod, an intermediate tie rod, an active pull rod shaft, a movable expansion member, and an expansion mandrel and the rubber ring; the turning body of the lathe is connected to the connecting plate of the lathe; the turning body of the lathe rotates around the axis of rotation; the tie rod of the lathe slides relative to the turning body of the lathe along the axis of rotation; one end of the middle tie rod is fixed to the tie rod of the lathe; The other end; the expansion mandrel is fixed to the rotating body of the lathe; the expansion mandrel is sleeved on the outer periphery of the active tie rod shaft; the expansion mandrel forms a expansion base; in the direction of the rotation axis, the movable expansion member and the expansion base Corresponding to the position; the expansion base is formed with an expansion hole that penetrates the expansion mandrel in the radial direction of the rotation axis; the movable expansion part is formed with a slanting block; the slanting block extends through the expansion hole to the expansion mandrel Inside: a spherical part is formed at one end of the active pull rod shaft; in the direction of the axis of rotation, the spherical part corresponds to the position of the inclined block; the rubber ring is sleeved on the outer periphery of the movable expansion member and the expansion mandrel.

Further, the middle tie rod and the lathe tie rod are connected by threads.

Further, a sealing ring is provided between the intermediate tie rod and the rotating body of the lathe. Further, the middle tie rod is formed with a lubricating oil storage chamber. Further, the expansion fixture suitable for sleeve parts includes two sealing rings; the lubricating oil storage chamber is located between the two sealing rings. Further, the rotating body of the lathe is formed with an oil filling port communicating with the lubricating oil storage chamber.

Further, the expansion clamp suitable for sleeve parts includes two rubber rings; in the direction of the axis of rotation, the inclined block is located between the two rubber rings. Further, the movable tension member is formed with two installation grooves for installing rubber rings. Further, the intermediate pull rod and the active pull rod shaft are connected by threads.

Further, the number of movable tension members is 3; the 3 movable tension members are evenly distributed along the circumference of the rotation axis. Further, the expansion base is located in the middle of the expansion mandrel in the direction of the rotation axis.

The advantage of the present invention is that the expansion clamp suitable for sleeve parts can realize automatic expansion and tightening of sleeve parts, and has high clamping stability. The movable expansion part can clamp the middle part of the sleeve part to avoid the problem of one side deflection and looseness caused by the end clamping, and it is also convenient to process the middle part of the sleeve part. It has high processing precision.

Description of drawings

Fig. 1 is a schematic diagram of an expansion fixture suitable for sleeve parts;

Fig. 2 is a cross-sectional view of the expansion fixture suitable for sleeve parts in Fig. 1;

Fig. 3 is an exploded view of the expansion clamp suitable for sleeve parts in Fig. 1 .

Detailed ways

The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 3 , a tensioning fixture 100 suitable for sleeve parts 200 includes: a lathe connecting plate 1, a lathe rotating body 2 defining a rotation axis 101, a lathe tie rod 3, an intermediate tie rod 4, a driving Pull rod shaft 5, movable expansion member 6, expansion mandrel 7 and rubber ring 8.

The lathe rotary body 2 is connected to the lathe connecting plate 1; the lathe rotary body 2 rotates around the rotary axis 101; the lathe tie rod 3 slides relative to the lathe rotary body 2 along the rotary axis 101; one end of the middle tie rod 4 is fixed to the lathe pull rod 3; the active pull rod shaft 5 is fixed to the other end of the middle tie rod 4; the expansion mandrel 7 is fixed to the turning body 2 of the lathe; the expansion mandrel 7 is sleeved on the outer periphery of the active tie rod shaft 5; the expansion mandrel 7 is formed with an expansion base 7a; In the direction of the axis of rotation 101, the movable expansion member 6 corresponds to the position of the expansion base 7a; the expansion base 7a is formed with an expansion hole 7b that penetrates the expansion mandrel 7 in the radial direction of the rotation axis 101; the movable expansion member 6 is formed with a slanting block 6a; the slanting block 6a extends into the inside of the expansion mandrel 7 through the expansion hole 7b; one end of the active tie rod shaft 5 is formed with a spherical portion 5a; in the direction of the rotation axis 101, the spherical portion 5a and The position of the inclined block 6a is corresponding; the rubber ring 8 is sleeved on the outer periphery of the movable expansion member 6 and the expansion mandrel 7 .

As a specific embodiment, the intermediate tie rod 4 and the lathe tie rod 3 are connected by threads.

As a specific implementation, a sealing ring 9 is provided between the intermediate tie rod 4 and the turning body 2 of the lathe. As a specific embodiment, the middle tie rod 4 is formed with a lubricating oil storage chamber 4a. As a specific implementation manner, the expansion clamp 100 suitable for sleeve parts 200 includes two sealing rings 9 ; the lubricating oil storage chamber 4 a is located between the two sealing rings 9 . As a specific embodiment, the rotating body 2 of the lathe is formed with an oil filling port 2a communicating with the lubricating oil storage chamber 4a.

As a specific embodiment, the expansion clamp 100 suitable for sleeve parts 200 includes two rubber rings 8 ; in the direction of the rotation axis 101 , the inclined block 6 a is located between the two rubber rings 8 .

As a specific embodiment, the movable tension member 6 is formed with two installation grooves 6b for installing the rubber ring 8 . As a specific implementation manner, the intermediate tie rod 4 and the active tie rod shaft 5 are connected by threads.

As a specific implementation, the number of movable tension members 6 is three; the three movable tension members 6 are evenly distributed along the circumference of the rotation axis 101 .

Working principle: Lathe tie rod 3 pulls the middle tie rod 4 to move. The middle tie rod 4 drives the active tie rod shaft 5 to move relative to the expansion mandrel 7 . The spherical portion 5a of the active tie rod shaft 5 cooperates with the inclined block 6a of the movable tension member 6 . As shown in FIG. 2 , when the active pull rod shaft 5 moves to the left, the movable expansion member 6 moves outward along the radial direction of the rotation axis 101 , thereby expanding the sleeve part 200 . When the active pull rod shaft 5 moves to the right, the rubber ring 8 drives the movable tension member 6 close to the active pull rod shaft 5 , thereby releasing the sleeve part 200 .

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. An expansion clamp suitable for sleeve parts, characterized in that it comprises: The lathe connection plate, the lathe rotary body defining a rotary axis, the lathe tie rod, the intermediate tie rod, the active pull rod shaft, the movable expansion member, the expansion mandrel and the rubber ring; the lathe rotary body is connected to the lathe connection plate; the The rotating body of the lathe rotates around the axis of rotation; the tie rod of the lathe slides along the axis of rotation relative to the rotating body of the lathe; one end of the middle tie rod is fixed to the tie rod of the lathe; the axis of the active tie rod is fixed to the The other end of the middle tie rod; the expansion mandrel is fixed to the turning body of the lathe; the expansion mandrel is sleeved on the outer periphery of the active tie rod shaft; the expansion mandrel is formed with a expansion base; In the direction of the rotation axis, the position of the movable expansion member corresponds to the expansion base; hole; the movable expansion part is formed with a slanting block; the slanting block extends through the expansion hole to the inside of the expansion mandrel; one end of the active pull rod shaft is formed with a spherical part; In the direction of the rotation axis, the spherical portion corresponds to the position of the inclined block; the rubber ring is sleeved on the outer circumference of the movable expansion part and the expansion mandrel. 2. The expansion clamp suitable for sleeve parts according to claim 1, characterized in that: The middle tie rod and the lathe tie rod are connected by threads. 3. The expansion fixture suitable for sleeve parts according to claim 1, characterized in that: A sealing ring is provided between the intermediate tie rod and the turning body of the lathe. 4. The expansion fixture suitable for sleeve parts according to claim 3, characterized in that: The middle tie rod is formed with a lubricating oil storage chamber. 5. The expansion fixture suitable for sleeve parts according to claim 4, characterized in that: The expansion clamp suitable for sleeve parts includes two sealing rings; the lubricating oil storage chamber is located between the two sealing rings. 6. The expansion fixture suitable for sleeve parts according to claim 5, characterized in that: The rotating body of the lathe is formed with an oil filling port communicating with the lubricating oil storage chamber. 7. The expansion fixture suitable for sleeve parts according to claim 1, characterized in that: The expansion clamp suitable for sleeve parts includes two rubber rings; in the direction of the axis of rotation, the inclined block is located between the two rubber rings. 8. The expansion fixture suitable for sleeve parts according to claim 7, characterized in that: The movable tension member is formed with two mounting grooves for mounting the rubber ring. 9. The expansion fixture suitable for sleeve parts according to claim 1, characterized in that: The intermediate pull rod and the active pull rod shaft are connected by threads. 10. The expansion fixture suitable for sleeve parts according to claim 1, characterized in that: The number of the movable tension members is 3; the 3 movable tension members are evenly distributed along the circumference of the rotation axis.