A machining center fixture

Abstract

This utility model provides a machining center fixture, belonging to the field of machining center technology, including a mounting plate; a base, which is fixedly mounted on the upper surface of the mounting plate, and the base has a positioning groove for positioning the workpiece; the base has several locking structures for fixing the workpiece on its side, the locking structure including a telescopic structure fixedly mounted on the mounting plate, and a locking block is hinged to the output shaft of the telescopic structure; this utility model, by setting a telescopic cylinder, locking block and connecting rod, can lock the workpiece while providing clearance for the machining tool, eliminating the need for separate machining of the workpiece edge, thus improving the machining efficiency of such parts; in addition, this fixture is made by sand mold 3D printing process, which is not only easy to process, but also saves the part processing time and assembly time of the fixture, and produces less waste, reducing the manufacturing cost of the fixture.

Description

Technical Field

[0001] This utility model relates to the field of machining center technology, and specifically to a machining center fixture. Background Technology

[0002] A machining center uses the rotation of the cutting tool as the main motion and the movement of the workpiece and the cutting tool as the feed motion. Through multi-blade intermittent cutting, it can machine various shapes such as planes, grooves, and curved surfaces on the workpiece.

[0003] Parts made by die casting aluminum often fail to meet requirements for dimensional accuracy and surface roughness, thus necessitating milling using a machining center.

[0004] When machining a workpiece, a general-purpose or special-purpose fixture is required. Before machining, the workpiece is first positioned by the positioning groove or positioning pin on the fixture, then the workpiece is pre-fixed by negative pressure adsorption, and finally the workpiece is fixed by the telescopic structure.

[0005] Currently, a problem has arisen when machining an irregularly shaped workpiece: the workpiece has a grooved structure with relatively narrow protruding edges, making it unsuitable for fixing at the protruding positions. Therefore, it is necessary to fix the workpiece by securing the bottom of the groove. However, the edges of the workpiece also need to be machined. If a separate fixture is designed, machining the edges separately after machining the other parts of the workpiece would increase the number of machining steps. Moreover, such similar irregular parts account for a significant proportion; if this problem is not resolved, it will lead to reduced efficiency in machining such workpieces.

[0006] Therefore, the preferred solution is to allow the corresponding telescopic structure to provide clearance during machining. However, the protruding edge makes traditional rotary lifting cylinders unusable, while ordinary lifting cylinders would make it difficult to place the workpiece and would not be able to avoid the machining tool. Utility Model Content

[0007] This utility model provides a machining center fixture to solve the technical problems in the prior art.

[0008] To solve the above problems, the machining center fixture provided by this utility model adopts the following technical solution: including a mounting plate;

[0009] The base is fixedly mounted on the upper surface of the mounting plate, and the base has a positioning groove for positioning the workpiece.

[0010] The base is characterized by having several locking structures for fixing workpieces on its side. The locking structure includes a telescopic structure fixedly mounted on the mounting plate. A locking block is hinged to the output shaft of the telescopic structure. A connecting block is fixedly mounted on the fixed end of the telescopic structure. The connecting block is located on the side close to the base. A connecting rod is hinged to the connecting block. The other end of the connecting rod is hinged to the locking block, so that the locking block can rotate around the connecting rod.

[0011] The telescopic structure has a locking position and a clearance position during its telescopic stroke. When the telescopic structure is in the locking position, it extends and the locking block is in close contact with the workpiece; when the telescopic structure is in the clearance position, it retracts and the locking block separates from the workpiece.

[0012] As a further improvement, the locking block has an integrally formed fastening part at one end near the base.

[0013] As a further improvement, the telescopic structure is a telescopic cylinder.

[0014] As a further improvement, the locking structure is provided with four sets.

[0015] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0016] This invention, by incorporating a telescopic cylinder, a locking block, and a connecting rod, not only locks the workpiece but also provides clearance for the machining tool, eliminating the need for separate edge processing of the workpiece and improving the processing efficiency of some irregularly shaped parts.

[0017] Furthermore, this fixture is manufactured using sand mold 3D printing technology, which not only makes the fixture easy to process but also saves the time for processing and assembling the fixture's components, and produces less waste, thus reducing the fixture's manufacturing cost.

[0018] After the machining tool finishes machining the middle position of the workpiece, it moves to the edge of the workpiece for machining. When the machining tool moves to the locking block, the telescopic cylinder retracts, causing the locking block to lift up and provide clearance for the machining tool. At this time, there are also three sets of locking structures to fix the workpiece, which can ensure the stability of the workpiece. After milling is completed, the lifted locking block is pressed down again to lock. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the machining center fixture of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Mounting plate; 2. Base; 3. Workpiece; 4. Locking structure; 401. Telescopic structure; 402. Connecting block; 403. Connecting rod; 404. Locking block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the existing technology, for some irregularly shaped workpieces, the obstruction of the edge protrusions prevents the commonly used rotary lifting cylinder from being used normally, while the traditional vertical lifting cylinder cannot avoid the machining tool and can only process the edge of the workpiece separately after the middle position of the workpiece has been processed.

[0025] To address the aforementioned issues, this invention incorporates a rotating structure where the locking block can rotate around the connecting rod. Locking and avoidance are achieved by driving the locking block with a telescopic cylinder.

[0026] Specifically, after the machining tool finishes machining the middle position of the workpiece, it moves to the edge of the workpiece for further machining and rotates one full turn. When the machining tool moves to the locking block, the telescopic cylinder retracts, causing the locking block to lift and provide clearance for the machining tool. At this time, three sets of locking structures fix the workpiece to ensure its stability. After milling is completed, the lifted locking block is pressed down again to lock.

[0027] In terms of manufacturing, considering that most of the components of this fixture are non-standard parts and are not suitable for mass production, and that traditional manufacturing costs are high, sand mold 3D printing technology is used to process the fixture of this utility model, which reduces the preparation cost of the fixture. Moreover, the sand mold 3D printing process has a better degree of freedom and can appropriately adjust the local structure according to the actual situation, making it more practical.

[0028] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0030] Embodiment 1 of the machining center fixture provided by this utility model:

[0031] like Figure 1 As shown, the machining center fixture includes a mounting plate 1, a base 2, and a locking structure 4;

[0032] The base 2 is fixedly installed on the upper surface of the mounting plate 1. The base 2 has a positioning groove for positioning the workpiece 3. The shape of the positioning groove can be adjusted according to the actual shape of the workpiece 3.

[0033] The base 2 is provided with several locking structures 4 for fixing the workpiece 3. In this embodiment, there are four sets of locking structures 4. The four sets of locking structures 4 are respectively set at the four corners of the base 2 to fix the four corners of the workpiece 3.

[0034] The locking structure 4 includes a telescopic structure 401 fixedly installed on the mounting plate 1. In this embodiment, the telescopic structure 401 adopts a telescopic cylinder. A locking block 404 is hinged on the output shaft of the telescopic structure 401. The locking block 404 has an L-shaped structure, and the bent part forms a fastening part, which facilitates fastening the workpiece 3 and locking and fixing the workpiece 3. A connecting block 402 is fixedly installed on the fixed end of the telescopic structure 401. The connecting block 402 is located on the side close to the base 2. A connecting rod 403 is hinged on the connecting block 402. The other end of the connecting rod 403 is hinged to the locking block 404, so that the locking block 404 can rotate around the connecting rod 403.

[0035] The telescopic structure 401 has a locking position and a clearance position during its telescopic stroke. When the telescopic structure 401 is in the locking position, it extends and the locking block 404 is in close contact with the workpiece 3. When the telescopic structure 401 is in the clearance position, it retracts and the locking block 404 separates from the workpiece 3.

[0036] While this specification has shown and described numerous embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A machining center fixture, comprising: Mounting plate (1); The base (2) is fixedly installed on the upper surface of the mounting plate (1), and the base (2) has a positioning groove for positioning the workpiece (3). The base (2) is characterized in that a plurality of locking structures (4) for fixing workpieces (3) are provided on the side of the base (2). The locking structure (4) includes a telescopic structure (401) fixedly installed on the mounting plate (1). A locking block (404) is hinged on the output shaft of the telescopic structure (401). A connecting block (402) is fixedly installed on the fixed end of the telescopic structure (401). The connecting block (402) is located on the side close to the base (2). A connecting rod (403) is hinged on the connecting block (402). The other end of the connecting rod (403) is hinged to the locking block (404), so that the locking block (404) can rotate around the connecting rod (403). The telescopic structure (401) has a locking position and a clearance position in its telescopic stroke. When the telescopic structure (401) is in the locking position, it extends and the locking block (404) is in close contact with the workpiece (3). When the telescopic structure (401) is in the clearance position, it retracts and the locking block (404) separates from the workpiece (3).

2. The machining center fixture according to claim 1, characterized in that: The locking block (404) has an integrally formed fastening part at one end near the base (2).

3. The machining center fixture according to claim 1, characterized in that: The telescopic structure (401) is a telescopic cylinder.

4. The machining center fixture according to any one of claims 1 to 3, characterized in that: The locking structure (4) has four sets.

Images