CN112692603B

CN112692603B - Milling machine fixture

Info

Publication number: CN112692603B
Application number: CN202110048838.8A
Authority: CN
Inventors: 熊保玉
Original assignee: Chengdu Vocational and Technical College of Industry
Current assignee: Chengdu Vocational and Technical College of Industry
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2022-10-11
Anticipated expiration: 2041-01-14
Also published as: CN112692603A

Abstract

The invention provides a milling machine fixture, which comprises a base and a positioning part arranged on the base, wherein the positioning part comprises: the fixed plate is fixed on the base; the movable plate is arranged on the base in a sliding mode; one end of the guide rod is fixed on the fixed plate, and the other end of the guide rod penetrates through the movable plate; the spring is sleeved on the guide rod; a driving member connected to the movable plate to slide the movable plate on the base along the guide bar; and the supporting column is arranged on the base in a sliding manner and is positioned between the fixed plate and the movable plate. The problem of current anchor clamps use the object single is solved. According to the milling machine fixture, the distance between the movable plate and the fixed plate is adjusted by sliding the movable plate, so that the milling machine fixture is suitable for the processing requirements of end covers with different diameters, the application range is expanded, and the universality is improved.

Description

Milling machine fixture

Technical Field

The invention belongs to the technical field of clamps, and particularly relates to a milling machine clamp.

Background

The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig.

The existing clamp generally refers to a special clamp according to the processed parts, namely, the clamp is specially designed and manufactured for the clamping requirement of a certain product part on a certain procedure, and has the advantages of single service object and strong pertinence.

Disclosure of Invention

The invention aims to provide a milling machine fixture, which solves the problem that the existing fixture is single in use object.

The technical scheme adopted by the invention is as follows:

a milling machine fixture, includes the base and sets up the setting element on the base, wherein, the setting element includes:

the fixed plate is fixed on the base;

the movable plate is arranged on the base in a sliding mode;

one end of the guide rod is fixed on the fixed plate, and the other end of the guide rod penetrates through the movable plate;

the spring is sleeved on the guide rod;

a driving member connected to the movable plate to slide the movable plate on the base along the guide bar; and

and the supporting column is arranged on the base in a sliding manner and is positioned between the fixed plate and the movable plate.

The milling machine fixture adjusts the distance between the movable plate and the fixed plate through the sliding of the movable plate, so that the milling machine fixture is suitable for the processing requirements of end covers with different diameters, the application range is enlarged, and the universality is increased.

Optionally, the drive member comprises:

one end of the driving rod is a connecting end connected to the movable plate through threads, and the other end of the driving rod is a free end extending out of the movable plate along the direction parallel to the guide rod;

the limiting block is fixed on the base; and

the handle is fixedly connected to the free end of the driving rod;

the driving rod penetrates through the limiting blocks, and two baffles for clamping the limiting blocks are arranged on the driving rod;

correspondingly, the movable plate is provided with a screw hole suitable for the driving rod.

Optionally, the thread on the drive rod extends at least from the attachment end to the stop plate.

Optionally, the drive member comprises:

the rotating column is rotatably arranged on the base through a torsion spring;

the rotating handle is connected to the rotating column; and

one end of the cam part is fixedly connected with the rotating handle, and the other end of the cam part is abutted against the outer end face of the movable plate;

wherein the cam part is rotated by pulling the rotation handle, and the distance between the center of the cam part and the movable plate is changed, thereby sliding the movable plate.

Optionally, when the spring is positioned between the fixed plate and the movable plate, two ends of the spring are respectively hinged to the inner wall surface of the fixed plate and the inner wall surface of the movable plate;

when the spring is located the movable plate outside, spring one end butt is on the outer wall face of movable plate, and the spring other end butt is in the guide arm, correspondingly, is equipped with the fender ring that the diameter is greater than the spring diameter on the guide arm.

Optionally, two guide rods are arranged and are arranged symmetrically by taking the center line of the base as an axis;

when the spring is positioned on the outer side of the movable plate, a sleeve is fixedly arranged on the movable plate and is sleeved on the spring.

Optionally, the lower end of the supporting column is provided with a sliding block, and correspondingly, the base is provided with a sliding groove matched with the sliding block;

the support column is connected to the movable plate through an elastic rope so that the support column follow-up plate slides in the sliding groove;

and a stop block is arranged in the sliding groove to limit the sliding distance of the supporting column.

Optionally, a pressing rod piece for pressing the workpiece is arranged on the supporting column, and the pressing rod piece comprises:

the lower cylinder is connected to the support column through threads;

the inner rod is connected to the lower barrel through threads;

the upper barrel is sleeved on the inner rod and is provided with a first annular groove with a downward opening; and

the plurality of pressure levers are connected to the inner rod through torsion springs and are positioned between the lower barrel and the upper barrel;

wherein, the interior pole rotates downwards to make the lower section of thick bamboo jack-up depression bar, the section of thick bamboo slides down, and the upper end of depression bar is pegged graft in to first annular.

Optionally, the upper barrel is provided with one of a ring part, a handle and a grab handle;

the lower cylinder is provided with a second annular groove with an upward opening so that the groove wall jacks up the pressure rod.

Optionally, the fixed plate is provided with a first groove body, the movable plate is provided with a second groove body, and the first groove body and the second groove body are oppositely arranged to form a clamping groove for clamping the workpiece.

The invention has the beneficial effects that:

the milling machine fixture adjusts the distance between the movable plate and the fixed plate through the sliding of the movable plate, so that the milling machine fixture is suitable for the processing requirements of end covers with different diameters, the application range is enlarged, and the universality is increased. Meanwhile, the milling machine fixture is simple in structure and convenient to operate, and is beneficial to improving the machining efficiency and the machining precision of the end cover.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic top view of the milling jig when the driving member is a driving rod;

FIG. 2 is a schematic side view of the milling jig when the driving member is a driving rod;

FIG. 3 is a schematic top view of the milling jig with the driving member being a rotating shank member;

fig. 4 is a schematic structural view of the presser bar member.

In the figure: 1. a base; 21. fixing a plate; 22. a movable plate; 23. a guide bar; 24. a spring; 25. a support column; 31. a drive rod; 32. a limiting block; 33. a handle; 34. a baffle plate; 41. rotating the column; 42. rotating the handle; 43. a cam portion; 5. a sleeve; 6. a slider; 7. a compression bar; 71. a lower barrel; 72. an inner rod; 73. feeding a barrel; 74. a pressure lever; 75. a first ring groove; 76. a second ring groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention conventionally lay out when in use, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is further described with reference to the following figures and specific embodiments.

As shown in fig. 1 to 4, the milling machine fixture of the present embodiment includes a base 1 and a positioning member disposed on the base 1, wherein the positioning member includes: a fixed plate 21 fixed on the base 1; a movable plate 22 slidably provided on the base 1; cooperate with each other to clamp the workpiece and thereby prevent the workpiece from moving during machining.

At least one guide rod 23, one end of which is fixed on the fixed plate 21 and the other end of which passes through the movable plate 22; the sliding of the movable plate 22 is guided, and structures such as groove bodies are prevented from being arranged on the base 1.

A spring 24 sleeved on the guide rod 23; the follower plate 22 slides to deform to reset the follower plate 22; while providing a clamping force when clamping the workpiece.

A driving member connected to the movable plate 22 to slide the movable plate 22 on the base 1 along the guide bar 23; an action point is provided to facilitate sliding of the movable plate 22, thereby improving efficiency in picking and placing the workpiece.

A support column 25 slidably disposed on the base 1 and located between the fixed plate 21 and the movable plate 22; the top surface of the support column 25 abuts against the workpiece, and the position of the workpiece is determined, which contributes to improvement of the machining accuracy.

According to the model of the milling machine that cooperates and uses, set up connection structure such as spout, through-hole on the base 1 to this milling machine fixture's use, and set up connection structure for the conventional technological means that technical personnel in the field mastered, no longer describe herein.

The milling machine fixture is used for illustrating the use of the milling machine fixture by taking an end cover to be machined as an example, after the milling machine fixture is fixed, the end cover to be machined is placed on the positioning piece, namely, a worker pulls the driving piece, so that the movable plate 22 slides on the base 1 along the guide rod 23 and is far away from the fixed plate 21, the distance between the fixed plate 21 and the movable plate 22 is increased, and when the distance is larger than the diameter of the end cover, the end cover is placed on the supporting column 25; meanwhile, the spring 24 is deformed when the movable plate 22 slides.

After the end cap is placed, the driving member is released, and the movable plate 22 slides along the guide rods 23 and approaches the fixed plate 21 under the elastic force of the spring 24, so that the movable plate 22 and the fixed plate 21 cooperate with each other to clamp the end cap, thereby performing the machining of the end cap.

It will be readily appreciated that the scope of use of the present mill jig is not limited to the illustrated end cap machining.

The milling machine fixture adjusts the distance between the movable plate 22 and the fixed plate 21 through the sliding of the movable plate 22, so that the milling machine fixture is suitable for the processing requirements of end covers with different diameters, the application range is expanded, and the universality is increased. Meanwhile, the milling machine fixture is simple in structure and convenient to operate, and is beneficial to improving the machining efficiency and the machining precision of the end cover.

In one embodiment of the present invention, there is provided a structure of a driving member, the driving member including: one end of the driving rod 31 is a connecting end connected to the movable plate 22 through a thread, and the other end is a free end extending to the outside of the movable plate 22 along a direction parallel to the guide rod 23; the threaded connection is easy to process, the processing cost is low, and the production cost is saved. The driving rod 31 is parallel to the guide rod 23, so that the driving rod 31 or the guide rod 23 is prevented from obstructing the sliding of the movable plate 22, and the service life is prolonged.

A stopper 32 fixed to the base 1; the stopper 34 is used in cooperation with the driving rod 31 to restrict the movement of the driving rod 31 so that the moving plate 22 slides by the driving rod 31.

A handle 33 fixedly connected to a free end of the driving rod 31; the efficiency of rotating the drive lever 31 is improved.

Wherein, the driving rod 31 passes through the limit block 32, and two baffles 34 for clamping the limit block 32 are arranged on the driving rod 31; correspondingly, the movable plate 22 is provided with screw holes adapted to the driving rods 31.

When the movable plate 22 slides, a worker holds the handle 33 to rotate the driving rod 31, the rotation of the driving rod 31 is transmitted to the movable plate 22 through the screw, and the driving rod 31 is kept relatively stationary due to the stopper 32 and the stopper 34 cooperating with each other to block the movement of the driving rod 31 toward or away from the movable plate 22, and the movable plate 22 slides to increase the distance between the movable plate 22 and the fixed plate 21.

In the embodiment of the present invention provided, the thread on drive rod 31 alternatively extends at least from the attachment end to stop plate 34. A stop 34 is provided at the handle 33 and the drive rod 31 may be provided as a light rod. Meanwhile, the length of the thread between the connecting end and the baffle 34 can be machined according to actual conditions, and the invention is not limited in any way.

In another embodiment of the present invention, there is provided a driving member, comprising: a rotating column 41 rotatably provided on the base 1 by a torsion spring; the torsion spring acts like the spring 24 so that the rotating post 41 returns to its original position under the influence of the torsion spring.

A rotation handle 42 connected to the rotation column 41; functions similarly to the handle 33, i.e., improves the rotational efficiency.

A cam portion 43 having one end fixedly connected to the rotation lever 42 and the other end abutting against the outer end surface of the movable plate 22; wherein the rotation handle 42 is pulled to rotate the cam portion 43, and the distance between the center of the cam portion 43 and the movable plate 22 is changed to slide the movable plate 22. That is, when the distance between the cam portion 43 and the movable plate 22 is changed and the cam is not stopped, the movable plate 22 is driven to slide by the spring 24.

When the movable plate 22 is slid, the worker holds the rotation lever 42 with a hand to rotate the rotation lever 42 along the rotation post 41, the cam portion 43 rotates with the rotation lever 42 to change the position where the cam portion 43 abuts against the movable plate 22, the distance between the center of the cam portion 43 and the movable plate 22 is changed, and the spring 24 elastically acts on the movable plate 22 to slide the movable plate 22.

The invention introduces the structure of two driving parts, which are respectively called as a driving rod 31 and a rotating handle 42, and the two driving parts are suitable for different situations, namely suitable for the driving rod 31 when the diameter change of end covers processed at the front and the back is large; conversely, a smaller change in the diameter of the end cap is appropriate for the turning handle 42.

In the embodiment of the present invention, the position where the spring 24 is disposed is described, and in one possible design, when the spring 24 is located between the fixed plate 21 and the movable plate 22, both ends of the spring 24 are respectively hinged to the inner wall surface of the fixed plate 21 and the inner wall surface of the movable plate 22.

In a possible design, when the spring 24 is located outside the movable plate 22, one end of the spring 24 abuts against the outer wall surface of the movable plate 22, and the other end of the spring 24 abuts against the guide rod 23, and accordingly, the guide rod 23 is provided with a stop ring with a diameter larger than that of the spring 24.

In the embodiment provided by the present invention, as an option, the guide rods 23 are provided in two and are arranged symmetrically with the central line of the base 1 as an axis; so that the stress of the guide rod 23 is balanced, the possibility of deflection and deformation of the guide rod 23 is reduced, and the service life is prolonged.

When the spring 24 is located outside the movable plate 22, the movable plate 22 is fixedly provided with the sleeve 5, and the sleeve 5 is sleeved on the spring 24. Cover through sleeve 5, reduce the piling up of impurity, reduce wearing and tearing improve life.

In the specific embodiment provided by the invention, as an option, the lower end of the supporting column 25 is provided with a sliding block 6, and correspondingly, the base 1 is provided with a sliding groove adapted to the sliding block 6; the size of the sliding groove is slightly larger than that of the sliding block 6, so that the resistance suffered by the sliding block 6 in the sliding process is reduced.

The supporting column 25 is connected to the movable plate 22 through an elastic rope so that the supporting column 25 slides along the movable plate 22 in the sliding groove; through the setting of elasticity rope for support column 25 follow-up plate 22 slides, thereby adjusts the position of support column 25, conveniently in directly placing the end cover, has avoided the position of staff's manual adjustment support column 25, helps improving machining efficiency.

In a possible design, when the driving member is a rotation handle 42, the sliding block 6 is connected to the rotation column 41 through an elastic rope, the rotation column 41 rotates, and the elastic rope is wound on the rotation column 41 to drive the support column 25 to slide.

And a stopper is provided in the slide groove to limit the sliding distance of the support post 25. Even if the support column 25 is prevented from being too close to the movable plate 22, the worker is required to manually adjust the position of the support column 25, which also contributes to the improvement of the processing efficiency.

Alternatively, the top surface of the support column 25 may be provided as a flat surface, a sloped surface, or configured in other configurations suitable for the workpiece, although the invention is not limited in this respect.

In the embodiment of the present invention, as an option, the supporting pillar 25 is provided with a pressing bar 7 for pressing the workpiece, and the pressing bar 7 applies a force on the workpiece to make the workpiece tightly adhere to the supporting pillar 25, which helps to improve the processing quality.

In one possible design, the presser bar element 7 comprises: a lower tube 71 connected to the support column 25 by a screw; the lower cylinder 71 is detachably connected to the support column 25, so that the connection between the compression bar member 7 and the support column 25 is realized.

An inner rod 72 connected to the lower cylinder 71 by a screw; the inner rod 72 is detachably connected with the lower barrel 71 through threaded connection, and the inner rod 72 rotates to adjust the length of the inner rod 72 inserted in the lower barrel 71.

The upper barrel 73 is sleeved on the inner rod 72 and is provided with a first annular groove 75 with a downward opening; the position of the upper cylinder 73 on the inner rod 72 is manually adjusted to insert the pressing rod 74 into the first annular groove 75, so as to limit the rotation of the pressing rod 74.

A plurality of pressure levers 74 connected to the inner rod 72 through torsion springs and positioned between the lower tube 71 and the upper tube 73; the press rods 74 press the workpiece against the support columns 25 by the elastic force provided by the torsion springs.

Alternatively, the number of the pressing rods 74 is selected according to actual conditions, and the invention is not limited in any way.

When the pressing rod member 7 works, a workpiece is placed on the supporting column 25, the upper barrel 73 is pulled upwards, the upper end of the pressing rod 74 is separated from the first annular groove 75, the limit of the upper barrel 73 on the pressing rod 74 is released, and the pressing rod 74 is driven by the torsion spring to rotate downwards, so that the pressing rod 74 presses the workpiece. At this time, the hinged end of the plunger 74 is away from the lower barrel 71, so as to prevent the lower barrel 71 from jacking up the plunger 74.

When the press rod piece 7 needs to be detached, the inner rod 72 rotates downwards, so that the lower barrel 71 jacks up the press rod 74, the press rod 74 rotates upwards under the action of the lower barrel 71 until the press rod 74 is parallel to the inner rod 72, the upper barrel 73 slides downwards, and the upper end of the press rod 74 is inserted into the first annular groove 75, so that the upper barrel 73 limits the rotation of the press rod 74. The inner lever 72 is rotated upward again to disengage the press lever 74 from the lower cylinder 71.

Further, depending on the use, it is selected whether or not the lower tube 71 is to be removed from the support column 25.

Optionally, as shown in fig. 4, an arc-shaped pressing block is disposed on the pressing rod 74 to improve the pressing effect.

In the specific embodiment provided by the present invention, as an option, one of a ring portion, a handle and a grip is provided on the upper barrel 73; the upper barrel 73 is convenient for workers to hold, and the efficiency of moving the upper barrel 73 by the workers is improved.

Optionally, a second annular groove 76 with an upward opening is formed on the lower cylinder 71, so that the groove wall jacks up the strut 74. The second annular groove 76 may also accommodate the plunger 74 to reduce foreign material attachment. Or, a plurality of convex parts are arranged on the lower barrel 71, and the convex parts and the press rods 74 are arranged in a one-to-one correspondence manner, so that the press rods 74 are jacked up through the convex parts.

In the embodiment of the present invention, as an option, a first groove body is provided on the fixed plate 21, a second groove body is provided on the movable plate 22, and the first groove body and the second groove body are arranged oppositely and constitute a clamping groove for clamping the workpiece. Thus, the contact area with the workpiece is increased, which contributes to enhancement of the clamping effect.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.

Claims

1. The utility model provides a milling machine fixture which characterized in that includes base (1) and sets up the setting element on base (1), and wherein, the setting element includes:

a fixed plate (21) fixed to the base (1);

a movable plate (22) slidably provided on the base (1);

at least one guide rod (23), one end of which is fixed on the fixed plate (21) and the other end of which passes through the movable plate (22);

a spring (24) sleeved on the guide rod (23);

a driving member connected to the movable plate (22) to slide the movable plate (22) on the base (1) along the guide bar (23); and

a support column (25) which is arranged on the base (1) in a sliding manner and is positioned between the fixed plate (21) and the movable plate (22);

be equipped with on support column (25) and be used for pressing the compression bar piece (7) of work piece, compression bar piece (7) include:

a lower cylinder (71) connected to the support column (25) by a screw thread;

an inner rod (72) which is connected to the lower tube (71) by a screw thread;

the upper barrel (73) is sleeved on the inner rod (72) and is provided with a first annular groove (75) with a downward opening; and

a plurality of pressure levers (74) which are connected with the inner rod (72) through torsion springs and are positioned between the lower barrel (71) and the upper barrel (73);

the inner rod (72) rotates downwards to enable the lower barrel (71) to jack the pressing rod (74), the upper barrel (73) slides downwards, and the upper end of the pressing rod (74) is inserted into the first annular groove (75).

2. The milling machine fixture of claim 1, wherein the drive member comprises:

one end of the driving rod (31) is a connecting end connected to the movable plate (22) through threads, and the other end of the driving rod is a free end extending out of the movable plate (22) along the direction parallel to the guide rod (23);

the limiting block (32) is fixed on the base (1); and

a handle (33) fixedly connected to the free end of the drive rod (31);

wherein the driving rod (31) penetrates through the limiting blocks (32), and two baffles (34) for clamping the limiting blocks (32) are arranged on the driving rod (31);

correspondingly, the movable plate (22) is provided with a screw hole which is suitable for the driving rod (31).

3. The milling machine fixture of claim 2, wherein: the thread on the drive rod (31) extends at least from the connection end to the stop plate (34).

4. The milling machine fixture of claim 1, wherein the drive includes:

the rotating column (41) is rotatably arranged on the base (1) through a torsion spring;

a rotation handle (42) connected to the rotation column (41); and

a cam part (43) with one end fixedly connected with the rotating handle (42) and the other end abutting against the outer end surface of the movable plate (22);

wherein the rotating handle (42) is pulled to rotate the cam part (43), and the distance between the center of the cam part (43) and the movable plate (22) is changed, thereby the movable plate (22) slides.

5. The milling machine fixture of any one of claims 1-4, wherein: when the spring (24) is positioned between the fixed plate (21) and the movable plate (22), two ends of the spring (24) are respectively hinged to the inner wall surface of the fixed plate (21) and the inner wall surface of the movable plate (22);

when the spring (24) is positioned on the outer side of the movable plate (22), one end of the spring (24) abuts against the outer wall surface of the movable plate (22), the other end of the spring (24) abuts against the guide rod (23), and correspondingly, the guide rod (23) is provided with a retaining ring with the diameter larger than that of the spring (24).

6. The milling machine jig according to any one of claims 1 to 4, wherein: the number of the guide rods (23) is two, and the guide rods are symmetrically arranged by taking the center line of the base (1) as an axis;

when the spring (24) is positioned on the outer side of the movable plate (22), the movable plate (22) is fixedly provided with the sleeve (5), and the sleeve (5) is sleeved on the spring (24).

7. The milling machine fixture of any one of claims 1-4, wherein: the lower end of the supporting column (25) is provided with a sliding block (6), and correspondingly, the base (1) is provided with a sliding groove matched with the sliding block (6);

the supporting column (25) is connected to the movable plate (22) through an elastic rope, so that the supporting column (25) follows the movable plate (22) to slide in the sliding groove;

and a stop block is arranged in the sliding groove to limit the sliding distance of the supporting column (25).

8. The milling machine fixture of claim 1, wherein: the upper barrel (73) is provided with one of a ring part, a handle and a grab handle;

the lower cylinder (71) is provided with a second annular groove (76) with an upward opening so that the groove wall jacks up the pressure lever (74).

9. The milling machine fixture of any one of claims 1-4, wherein: a first groove body is arranged on the fixed plate (21), a second groove body is arranged on the movable plate (22), and the first groove body and the second groove body are oppositely arranged to form a clamping groove for clamping a workpiece.