Machining center and pneumatic clamp thereof

Abstract

The utility model discloses a pneumatic clamp of a machining center. The pneumatic clamp of the machining center comprises a base, a pressing and fixing device, a machining workbench and a distance adjusting air cylinder. The base comprises two seat bodies which are arranged in parallel, and the two seat bodies are connected through a linkage rod, so that the two seat bodies can move relatively; the pressing and fixing device comprises a pair of downward pressing air cylinders, a pair of clamping jaws and a pressing head, wherein the downward pressing air cylinders are symmetrically connected to the two base bodies respectively. The machining working table comprises a first table top and a second table top, and the first table top and the second table top are placed on the two base bodies correspondingly. The distance adjusting air cylinder is fixed to one seat body, an output shaft of the distance adjusting air cylinder is fixed to a bearing connected to the other seat body, and the distance adjusting air cylinder is used for driving the two seat bodies to move relatively and changing the distance between the two seat bodies. Therefore, the pneumatic clamp can meet the clamping requirements of workpieces with different lengths and sizes, the universality of the pneumatic clamp is expanded, the requirement for replacing the clamp is reduced, the production cost is reduced, and the machining operation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic fixtures, in particular to a machining center and its pneumatic fixture. Background Art

[0002] Workholding fixtures are indispensable devices in machining centers. They are used to quickly fasten workpieces during machining to accurately machine the workpieces at the correct positions. Among various types of fixtures, pneumatic fixtures are a relatively common type. Their working principle is based on the transmission and control of air pressure. When air pressure is introduced into the fixture, the piston in the cylinder will move under the action of air pressure, thereby driving the jaws to clamp the workpiece. Conversely, when the air pressure is released, the jaws will be released under the action of spring force or other mechanical structures.

[0003] Generally, pneumatic fixtures are provided with paired jaws that respectively press and fix the two ends of the workpiece placed on the machining table. However, the existing workholding fixtures do not have the function of adjusting the distance between a pair of jaws. The fixed jaw distance makes it difficult to adapt to the clamping requirements of workpieces with different length dimensions, resulting in poor versatility, increased production costs, and complexity of replacing fixtures. Therefore, designing a pneumatic fixture with adjustable jaw distance to adapt to the clamping requirements of workpieces with various length dimensions has become an urgent problem to be solved. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a machining center and its pneumatic fixture to solve the above problems.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] The present utility model first provides a pneumatic fixture for a machining center, which includes a base, a pressing device, a machining table, and a distance adjusting cylinder. The base includes two juxtaposed seat bodies, and the two seat bodies are connected by a linkage rod so that the two seat bodies can move relative to each other; the pressing device includes paired downward pressing cylinders symmetrically connected to the two seat bodies respectively, paired jaws correspondingly connected to the output shafts of the downward pressing cylinders, and pressing heads correspondingly arranged at the ends of the jaws; the machining table includes a first tabletop and a second tabletop, and the first tabletop and the second tabletop are respectively placed on the two seat bodies, and the first tabletop and the second tabletop are symmetrical to each other and are respectively located below the corresponding pressing heads; the distance adjusting cylinder is fixed on one of the seat bodies, and the output shaft of the distance adjusting cylinder is fixed to the bearing connected to the other seat body, and is used to drive the relative movement between the two seat bodies and change the distance between the two seat bodies.

[0007] Preferably, one side of the first tabletop and the second tabletop that are close to each other is flush with the corresponding edge of the seat body, and vertical limiting retaining walls are respectively arranged on one side of the first tabletop and the second tabletop that are far away from each other.

[0008] Preferably, the seat body includes an upper layer board and a lower layer board. The upper layer board is placed on the lower layer board through support columns. The downward pressing air cylinder is locked to the bottom of the corresponding upper layer board. The output shaft of the downward pressing air cylinder penetrates through the upper layer board to the upper side of the upper layer board. The first tabletop and the second tabletop are respectively fixed to the top of the corresponding upper layer board. The spacing adjusting air cylinder and the bearing are respectively fixed to the top of the corresponding lower layer board.

[0009] Preferably, a plurality of side-by-side linkage rods are connected between the two upper layer boards, and a plurality of side-by-side linkage rods are also connected between the two lower layer boards.

[0010] Preferably, a through hole for the output shaft of the spacing adjusting air cylinder to pass through is formed in the bearing, and the output shaft of the spacing adjusting air cylinder is clamped and fixed to both ends of the through hole through a clamping joint.

[0011] Preferably, the pressing head is a pressing head made of elastic material, and the first tabletop and the second tabletop are tabletops made of elastic material.

[0012] The present utility model also provides a machining center, which includes a machine body and the pneumatic fixture as described above connected to the machine body.

[0013] The technical effects achieved by the technical solution of the present utility model mainly include:

[0014] Based on the above configuration of the pneumatic fixture, the relative movement between the two seat bodies can be promoted by the telescopic movement of the output shaft of the spacing adjusting air cylinder, the spacing between the two clamping jaws is adjusted, the clamping requirements of workpieces with different length dimensions are adapted, the versatility of the pneumatic fixture is expanded, the requirement for replacing the fixture is reduced, the production cost is compressed, and the processing operation efficiency is effectively improved;

[0015] Moreover, the outer side surface of the pressing head can limit the outer side surface or the inner wall of the workpiece, and can play a role in pressing or tensioning in the horizontal direction, and cooperate with the pressing device to improve the fixing effect on the workpiece. Description of the Drawings

[0016] Figure 1 is a schematic structural view of the pneumatic fixture of the machining center provided by the embodiment of the present utility model;

[0017] Figure 2 is a schematic view of the pneumatic fixture when clamping a workpiece;

[0018] Figure 3 is a side view of the pneumatic fixture.

[0019] The reference numerals in the above-mentioned drawings are as follows:

[0020] Base 1, seat body 11, upper layer plate 111, lower layer plate 112, support column 113, linkage rod 12;

[0021] Pressing and fixing device 2, downward pressing cylinder 21, clamping jaw 22, pressing head 23;

[0022] Processing workbench 3, first table surface 31, second table surface 32;

[0023] Spacing adjustment cylinder 4, clamping joint 41;

[0024] Bearing 5;

[0025] Workpiece 6. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will describe in detail the specific implementation manners of the present utility model with reference to the drawings. Examples of these preferred implementation manners are illustrated in the drawings. The implementation manners of the present utility model shown in the drawings and described according to the drawings are merely exemplary, and the present utility model is not limited to these implementation manners.

[0027] Herein, in order to avoid obscuring the present utility model with unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details of little relevance are omitted.

[0028] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a pneumatic fixture for a machining center, which includes a base 1, a pressing and fixing device 2, a processing workbench 3 and a spacing adjustment cylinder 4.

[0029] The base 1 includes two seat bodies 11 arranged in parallel, and the two seat bodies 11 are connected by a linkage rod 12, so that the two seat bodies 11 can move relative to each other;

[0030] The pressing and fixing device 2 includes a pair of downward pressing cylinders 21 symmetrically and respectively connected to the two seat bodies 11, a pair of clamping jaws 22 correspondingly connected to the output shafts of the downward pressing cylinders 21, and pressing heads 23 correspondingly arranged at the ends of the clamping jaws 22;

[0031] The processing workbench 3 includes a first table surface 31 and a second table surface 32. The first table surface 31 and the second table surface 32 are respectively placed on the two seat bodies 11. The first table surface 31 and the second table surface 32 are symmetric with each other and are respectively located below the corresponding pressing heads 23;

[0032] The spacing adjustment cylinder 4 is fixed on one of the seat bodies 11. The output shaft of the spacing adjustment cylinder 4 is fixedly connected to the bearing 5 connected to the other seat body 11, and is used to drive the relative movement between the two seat bodies 11 to change the spacing between the two seat bodies 11.

[0033] When using the pneumatic fixture of the machining center, the workpiece 6 is placed on the first table surface 31 and the second table surface 32. One end of the workpiece 6 overlaps above the first table surface 31, and the other end overlaps above the second table surface 32. Based on the above configuration of the pneumatic fixture, the relative movement between the two seat bodies 11 can be promoted by the telescopic movement of the output shaft of the spacing adjustment cylinder 4 to change the spacing between the two seat bodies 11. Since the clamping jaws 22 are respectively located above the two seat bodies 11, the spacing between the two clamping jaws 22 is thus adjusted, and the pressing position of the pressing head 23 at the end of the clamping jaw 22 is changed to adapt to the clamping requirements of workpieces 6 with different lengths, expanding the versatility of the pneumatic fixture, reducing the need to replace the fixture and thus reducing the production cost, and effectively improving the processing operation efficiency.

[0034] Moreover, the outer side surface of the pressing head 23 can be in contact with the outer side surface of the workpiece 6 or the inner wall of the workpiece 6. Through the relative movement between the two seat bodies 11, the pressing head 23 can play a role of pressing or tensioning in the horizontal direction of the relative movement between the seat bodies 11, assisting in improving the fixing effect on the workpiece 6.

[0035] In this embodiment, the sides of the first table surface 31 and the second table surface 32 that are close to each other are flush with the edges of the corresponding seat bodies 11. On the sides of the first table surface 31 and the second table surface 32 that are away from each other, vertical limiting retaining walls 33 are respectively provided. When the two seat bodies 11 approach each other until they come into contact, the first table surface 31 and the second table surface 32 are joined to form a continuous processing table 3. For some workpieces 6 with larger length dimensions, the vertical limiting retaining walls 33 can hold the outer side surface of the workpiece 6 when the two seat bodies 11 approach each other, and can also cooperate with the pressing device 2 to improve the fixing effect on the workpiece 6.

[0036] Specifically, the seat body 11 includes an upper layer plate 111 and a lower layer plate 112. The upper layer plate 111 is placed on the lower layer plate 112 through the support columns 113. The upper layer plate 111 and the lower layer plate 112 are respectively locked at both ends of the support columns 113. The downward pressing cylinder 21 is locked at the bottom of the corresponding upper layer plate 111. The output shaft of the downward pressing cylinder 21 penetrates through the upper layer plate 111 to the upper side of the upper layer plate 111. The first table surface 31 and the second table surface 32 are respectively fixed on the top of the corresponding upper layer plate 111. The spacing adjustment cylinder 4 and the bearing 5 are respectively fixed on the top of the corresponding lower layer plate 112. The above structure has a uniform and orderly spatial distribution of the base 1, and they avoid each other and are staggered, making the structure of the base 1 relatively stable and easy to construct.

[0037] The linkage rod 12 serves as a guiding structure for the relative movement between the two seat bodies 11, ensuring that the path of the relative movement between the two seat bodies 11 is precise and not easily deviated, and the movement is smoother. A plurality of parallel linkage rods 12 are connected between the two upper plates 111, and a plurality of parallel linkage rods 12 are also connected between the two lower plates 112.

[0038] To facilitate the installation of the output shaft of the spacing adjustment cylinder 4, a through hole for the output shaft of the spacing adjustment cylinder 4 to pass through is provided on the bearing 5. One side of the through hole is grooved to facilitate the bearing 5 to be inserted into the through hole from the grooved part. The bearing 5 is locked to the top of the lower plate 112 of the corresponding seat body 11 by screws, and the grooved part is buckled. The output shaft of the spacing adjustment cylinder 4 is clamped at both ends of the through hole through the clamping joint 41. Therefore, both the extension and retraction of the spacing adjustment cylinder 4 can drive the movement of the bearing 5 and the seat body 11 connected thereto.

[0039] Specifically, the above-mentioned clamping jaw 22 extends along the horizontal direction of the relative movement between the seat bodies 11, and a pressing head 23 extending downward is sleeved at the end of the clamping jaw 22. The bottom of the pressing head 23 abuts against the workpiece 6 placed on the first table surface 31 and the second table surface 32. Therefore, in order to avoid leaving indentations on the workpiece 6 due to excessive pressure and to clamp the workpiece 6, in this embodiment, the pressing head 23 is a pressing head made of elastic material, and the first table 31 and the second table surface 32 are table surfaces made of elastic material.

[0040] The embodiment of the present utility model also provides a machining center, which includes a bed body and the pneumatic fixture as described above connected to the bed body.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0042] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present application.

Claims

1. A pneumatic fixture for a machining center, characterized in that, include: A base (1), the base (1) comprising two base bodies (11) arranged in parallel, the two base bodies (11) being connected via a linkage rod (12) so that the two base bodies (11) can move relative to each other; A pressing device (2), the pressing device (2) comprising a pair of downward pressing cylinders (21) symmetrically connected to the two base bodies (11), a pair of clamping jaws (22) correspondingly connected to the output shafts of the downward pressing cylinders (21), and a pressing head (23) correspondingly arranged at the ends of the clamping jaws (22); A processing table (3), the processing table (3) comprising a first table top (31) and a second table top (32), the first table top (31) and the second table top (32) being respectively placed on two base bodies (11), the first table top (31) and the second table top (32) being symmetrical to each other and respectively located below corresponding pressure heads (23); A spacing adjustment cylinder (4) is fixed on one of the base bodies (11), and an output shaft of the spacing adjustment cylinder (4) is fixed to a bearing (5) connected to the other base body (11) and is used to drive the relative movement between the two base bodies (11) to change the spacing between the two base bodies (11).

2. The pneumatic fixture of the machining center according to claim 1, wherein The side of the first table top (31) and the second table top (32) that is close to each other is flush with the edge of the corresponding seat body (11), and the side of the first table top (31) and the second table top (32) that is away from each other is respectively provided with a vertical limit retaining wall (33).

3. The pneumatic fixture of the machining center according to claim 1, characterized in that, The seat body (11) comprises an upper plate (111) and a lower plate (112), wherein the upper plate (111) is supported on the lower plate (112) via a support column (113), a downward pressure cylinder (21) is locked to the bottom of the corresponding upper plate (111), an output shaft of the downward pressure cylinder (21) penetrates the upper plate (111) to the top of the upper plate (111), a first table top (31) and a second table top (32) are respectively fixed to the top of the corresponding upper plate (111), and the spacing adjustment cylinder (4) and the bearing (5) are respectively fixed to the top of the corresponding lower plate (112).

4. The pneumatic fixture of the machining center according to claim 3, characterized in that, A plurality of parallel linkage rods (12) are connected between the two upper plates (111), and a plurality of parallel linkage rods (12) are also connected between the two lower plates (112).

5. The pneumatic fixture of the machining center according to claim 1, characterized in that, The bearing (5) is provided with a through hole for the output shaft of the spacing adjustment cylinder (4) to pass through, and the output shaft of the spacing adjustment cylinder (4) is clamped to both ends of the through hole via a clamping joint (41).

6. The pneumatic fixture of the machining center according to claim 1, characterized in that The pressing head (23) is a pressing head made of an elastic material, and the first table surface (31) and the second table surface (32) are table surfaces made of an elastic material.

7. A machining center, characterized in that, The invention comprises a bed and a pneumatic clamp as claimed in any one of claims 1 to 6 connected to the bed.

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