CN221495172U - A positioning fixture for machine tool processing workpiece - Google Patents

Abstract

The utility model relates to the technical field of workpiece machine tool positioning fixture design, and discloses a machine tool workpiece positioning fixture, including a support table, a fixing cylinder is fixedly connected to the bottom outer wall of the support table, a through slot is opened on the support table, a hinge plate is fixedly connected to the top outer wall of the support table, a device box is fixedly connected to the top outer wall of the support table, an auxiliary positioning device is arranged inside the device box, the auxiliary positioning device includes a ratchet, the ratchet is rotatably connected to the inner wall of the device box through a bearing, and a braking pawl is fixedly connected to the inner wall of the device box. The auxiliary positioning device is arranged to cooperate with the main fixing component for auxiliary fixing, the hand crank is rotated to rotate the ratchet, and the ratchet drives the fixed column to rotate while rotating, and the fixed column cooperates with the push plate and the sliding rod to make the push plate perform auxiliary fixing, so as to prevent the workpiece from displacement and causing inaccurate processing.

Description

A positioning fixture for machine tool processing workpiece

Technical Field

The utility model relates to the technical field of workpiece machine tool positioning fixture design, in particular to a machine tool processing workpiece positioning fixture.

Background Art

A machine tool fixture is a device used to clamp workpieces (and guide tools) on machine tools. Its function is to position the workpiece so that it can obtain the correct position relative to the machine tool and tool, and to clamp the workpiece reliably. Machine tool fixtures are widely used in the machinery manufacturing industry. The adoption of a large number of special machine tool fixtures provides the necessary conditions for large-scale mass production. Machine tool fixtures are a link in the process system and an important factor affecting the processing quality. In general, the use of machine tool fixtures can stably guarantee product quality without requiring too high a technical level of workers. Machine tool fixture design generally includes two aspects: structural design and precision design. However, people are usually accustomed to focusing on structural design and ignoring precision design. Regarding the structural design of machine tool fixtures, there is not only a large amount of information available for reference, but also continuous absorption of new achievements from other disciplines to move forward. As the precision of parts processing increases, the precision design of machine tool fixtures is also increasingly valued by people.

As shown in the Chinese patent publication number, the technical solution disclosed in the patent document is as follows: it includes a base plate, a fixed sleeve is arranged at the bottom of the base plate, a nut is arranged on one side of the fixed sleeve, a balancing platform is arranged at the bottom of the fixed sleeve, a support platform is arranged above the base plate, a positioning pin hole is arranged on the outer wall of the support platform, a support pin is arranged above the support platform, and a fixed block is arranged above the support pin.

but:

During the machining process of the workpiece, after being processed by the machining components, movement may occur, which may make the components of the workpiece unable to be accurately machined and the positioning inaccurate.

Utility Model Content

1. Technical issues to be solved

In view of the shortcomings of the prior art, the utility model provides a positioning fixture for machining workpieces of machine tools. The utility model has the advantage that a positioning plate can be added so that a reference object and a brake assembly are provided in a specific direction of the machining fixture, thereby judging and reducing the displacement of the workpiece.

(II) Technical solution

The cam is provided with a toothed plate at the bottom of the support frame, and the toothed plate is provided with a toothed plate at the bottom of the support frame, and a toothed plate is provided at the bottom of the support frame.

Preferably, a slide groove is provided on the push plate, and the slide groove of the push plate is in contact with the fixed column. By providing the slide groove on the push plate, the fixed column drives the push plate to move during the movement.

Preferably, the clamp fixing device includes a hydraulic telescopic rod, which is fixedly connected to the fixing cylinder, a pulling plate is fixedly connected to the top of the hydraulic telescopic rod, a limiting plate is fixedly connected to the top outer wall of the support platform, and a rocking rod is hinged on the limiting plate through a hinge block.

Preferably, the clamp fixing device further comprises a sliding groove, wherein the sliding groove is provided on the rocking rod, the rocking rod is hinged to a hinge rod via a hinge block, a connecting plate is hinged to the hinge rod via a hinge block, and a clamping plate is fixedly connected to the connecting plate.

Preferably, the number of the hinged plates is four, two of which form a group and are adapted to the clamping plate and hinged to the clamping plate through a hinge block. By providing symmetrical and appropriate hinged plates, the clamping plate can better fix the workpiece.

Preferably, the clamping plate is provided with auxiliary grooves, and the number of the auxiliary grooves on a single clamping plate is three. The auxiliary grooves are provided to fix workpieces with irregular shapes, so that the adaptability of the device is higher.

(III) Beneficial effects

Compared with the prior art, the utility model provides a positioning fixture for machine tool processing workpieces, which has the following beneficial effects:

1. This kind of machine tool workpiece positioning fixture is equipped with an auxiliary positioning device to assist in fixing with the main fixing component. The ratchet is rotated by turning the hand crank, and the ratchet drives the fixed column to rotate while rotating. The fixed column cooperates with the push plate and the sliding rod to assist in fixing the push plate to prevent the workpiece from being displaced and causing inaccurate processing.

2. This kind of machine tool processing workpiece positioning fixture can stably fix the workpiece by setting a fixture fixing device. The operation of the hydraulic telescopic rod drives the pulling plate to make the rocking rod work under the action of the sliding groove. The rocking rod drives the connecting plate to move at the same time through the hinge rod. After the connecting plate is tightened by the pulling force, the workpiece between the two clamping plates is fixed, so that the device produces a basic clamping effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

In the attached picture:

Figure 1 is a front view of the utility model;

Figure 2 is a front view of the utility model;

FIG. 3 is a side view of the utility model.

In the figure: 1. support platform; 2. fixing cylinder; 3. through slot; 4. hinged plate; 5. device box; 6. auxiliary positioning device; 601. ratchet; 602. brake pawl; 603. fixed column; 604. sliding rod; 605. push plate; 606. push plate; 607. hand crank; 7. clamp fixing device; 701. hydraulic telescopic rod; 702. pulling plate; 703. limit plate; 704. rocking rod; 705. sliding slot; 706. hinged rod; 707. connecting plate; 708. splint.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

Example 1

As shown in Figures 1-3, the utility model provides a positioning fixture for machine tool workpieces, including a support table 1, a fixed cylinder 2 is fixedly connected to the bottom outer wall of the support table 1, a through slot 3 is opened on the support table 1, a hinge plate 4 is fixedly connected to the top outer wall of the support table 1, a device box 5 is fixedly connected to the top outer wall of the support table 1, an auxiliary positioning device 6 is arranged inside the device box 5, the auxiliary positioning device 6 includes a ratchet 601, the ratchet 601 is rotatably connected to the inner wall of the device box 5 through a bearing, a braking pawl 602 is fixedly connected to the inner wall of the device box 5, and a fixed column is fixedly connected to the outer wall of the ratchet 601 603, a sliding rod 604 is slidably connected to the device box 5, one end of the sliding rod 604 is fixedly connected to a push plate 605, and the other end of the sliding rod 604 is fixedly connected to a push plate 606. A hand crank 607 is rotatably connected to the outer wall of the device box 5 through a bearing, and the hand crank 607 penetrates the device box 5 and is fixedly connected to the ratchet 601. A clamp fixing device 7 is provided on the support platform 1, and a sliding groove is provided on the push plate 605, and the sliding groove of the push plate 605 is in contact with the fixed column 603. By setting the sliding groove on the push plate 605, the fixed column 603 drives the push plate 605 to move during the movement.

In this embodiment, an auxiliary positioning device 6 is provided to cooperate with the main fixing component for auxiliary fixing. The hand crank 607 is rotated to rotate the ratchet 601. The ratchet 601 drives the fixed column 603 to rotate while rotating. The fixed column 603 cooperates with the push plate 605 and the sliding rod 604 to enable the push plate 606 to perform auxiliary fixing to prevent the workpiece from being displaced and causing inaccurate processing.

Example 2

As shown in Figures 1-3, on the basis of Example 1, the utility model provides a technical solution: preferably, it also includes: the clamp fixing device 7 includes a hydraulic telescopic rod 701, the hydraulic telescopic rod 701 is fixedly connected to the fixed cylinder 2, the top of the hydraulic telescopic rod 701 is fixedly connected to a pulling plate 702, a limit plate 703 is fixedly connected to the top outer wall of the support platform 1, and a rocking rod 704 is hinged on the limit plate 703 through a hinge block, and the clamp fixing device 7 also includes a sliding groove 705, the sliding groove 705 is opened on the rocking rod 704, and the rocking rod 704 is hinged through the hinge block There is a hinge rod 706, and a connecting plate 707 is hinged on the hinge rod 706 through a hinge block. A clamp 708 is fixedly connected to the connecting plate 707. There are four hinge plates 4. Two hinge plates 4 form a group and are adapted to the clamp 708 and are hinged to the clamp 708 through a hinge block. By setting symmetrical and suitable hinge plates 4, the clamp 708 can better fix the workpiece. Auxiliary grooves are opened on the clamp 708. The number of auxiliary grooves on a single clamp 708 is three. The auxiliary grooves are used to fix workpieces with irregular shapes, so that the adaptability of the device is higher.

In this embodiment, the workpiece is stably fixed by setting up a clamp fixing device 7, and the operation of the hydraulic telescopic rod 701 drives the pulling plate 702 to make the rocking rod 704 work under the action of the sliding groove 705. The rocking rod 704 drives the connecting plate 707 to move through the hinge rod 706. After the connecting plate 707 is tightened by the pulling force, the workpiece between the two clamping plates 708 is fixed, so that the device produces a basic clamping effect.

The following is a detailed description of the working principle of this machine tool workpiece positioning fixture.

As shown in Figures 1-3, when in use, the hydraulic telescopic rod 701 drives the pulling plate 702 to work under the action of the sliding groove 705, and the rocking rod 704 drives the connecting plate 707 to move through the hinge rod 706. After the connecting plate 707 is subjected to the pulling force, it is tightened to fix the workpiece between the two clamping plates 708, and the ratchet 601 is rotated in conjunction with the rotating hand crank 607. The ratchet 601 drives the fixed column 603 to rotate while rotating. The fixed column 603 cooperates with the push plate 605 and the sliding rod 604 to assist in fixing the push plate 606.

Claims (6)

1. The utility model provides a lathe processing work piece positioning fixture, includes brace table (1), its characterized in that: fixedly connected with fixed cylinder (2) on the bottom outer wall of brace table (1), set up logical groove (3) on brace table (1), fixedly connected with hinged plate (4) on the top outer wall of brace table (1), fixedly connected with device box (5) on the top outer wall of brace table (1), the inside of device box (5) is provided with auxiliary positioning device (6), auxiliary positioning device (6) include ratchet (601), ratchet (601) are rotated through the bearing and are connected on the inner wall of device box (5), fixedly connected with brake pawl (602) on the inner wall of device box (5), fixedly connected with fixed column (603) on the outer wall of ratchet (601), fixedly connected with slide bar (604) on device box (5), one end fixedly connected with push plate (605) of slide bar (604), the other end fixedly connected with push pedal (606) of slide bar (604), be connected with pole (607) through the bearing rotation on the outer wall of device box (5), and hand crank (601) are connected with hand crank (601) on the outer wall of device box (5).

2. A machine tool work piece positioning fixture as defined in claim 1, wherein: the pushing plate (605) is provided with a sliding groove, and the sliding groove of the pushing plate (605) is contacted with the fixed column (603).

3. A machine tool work piece positioning fixture as defined in claim 1, wherein: the fixture fixing device (7) comprises a hydraulic telescopic rod (701), the hydraulic telescopic rod (701) is fixedly connected to the fixed cylinder (2), a pulling plate (702) is fixedly connected to the top of the hydraulic telescopic rod (701), a limiting plate (703) is fixedly connected to the outer wall of the top of the supporting table (1), and a shaking rod (704) is hinged to the limiting plate (703) through a hinge block.

4. A machine tool work piece positioning fixture as defined in claim 3, wherein: the fixture fixing device (7) further comprises a sliding groove (705), the sliding groove (705) is formed in the rocking rod (704), the rocking rod (704) is hinged with a hinge rod (706) through a hinge block, the hinge rod (706) is hinged with a connecting plate (707) through the hinge block, and a clamping plate (708) is fixedly connected to the connecting plate (707).

5. A machine tool work piece positioning fixture as defined in claim 4, wherein: the number of the hinge plates (4) is four, and two hinge plates (4) are a group which are matched with the clamping plates (708) and are hinged with the clamping plates (708) through the hinging blocks.

6. A machine tool work piece positioning fixture as defined in claim 4, wherein: auxiliary grooves are formed in the clamping plates (708), and the number of the auxiliary grooves in each clamping plate (708) is three.