Tool clamp for mechanical design

Abstract

The invention provides a tool clamp for mechanical design, which belongs to the technical field of machining clamps, and comprises a clamp body base, and a positioning element, a clamping device and a guide device which are arranged on a workpiece on the base. The workpiece positioning element comprises a supporting plate used for placing and positioning a workpiece and a supporting nail used for limiting the degree of freedom of the workpiece in the horizontal direction. According to the clamping device, a corner oil cylinder drives a rotary pressing plate to act so that the workpiece can be firmly fixed to the base in the machining process. According to the guide device, a boring die support is connected with a clamp body base through a positioning pin and a hexagon head bolt, and then a boring sleeve, a bushing for the boring sleeve and a boring sleeve screw are connected with the boring die support. All components are manufactured separately, the overall structure is simple and compact, installation is easy, meanwhile, the clamping device uses the corner oil cylinder and the rotary pressing plate, the problems that an existing tool clamp is difficult in workpiece disassembly and assembly, and workpieces are prone to shaking in the machining process are solved, and the machining efficiency and machining precision of the workpieces are better improved through a hydraulic clamping mode.

Description

Technical field:

[0001] The invention relates to the technical field of mechanical processing fixtures, and in particular to a tooling fixture for mechanical design. Background technology:

[0002] A fixture is a device used to position and clamp a workpiece, and is widely used in the fields of mechanical manufacturing, assembly, and testing. The positioning elements and clamping devices on the fixture can ensure that the workpiece remains stable during the machining process, reducing the impact of vibration and deformation on machining accuracy.

[0003] During the machining process, the workpiece will be subjected to the cutting force and impact force from the cutting tool. Generally, the workpiece is clamped by mechanical clamping. Due to the randomness of the mechanical clamping method, it is easy to cause the workpiece to be unstable or excessively deformed during the machining process, affecting the machining accuracy of the workpiece.

[0004] By designing special fixtures for workpieces, complex workpieces can also be processed on machine tools. The assembly and disassembly of the fixture is simpler, which reduces the time cost accordingly, improves the working conditions of workers, and increases economic benefits. Summary of the invention:

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a tooling fixture for mechanical design, aiming to solve the technical problems that the existing tooling fixtures are unstable or prone to excessive deformation during processing due to the use of general mechanical clamping methods, thereby affecting their processing accuracy.

[0006] The solution adopted by the present invention to solve the above problems is:

[0007] A tooling fixture for mechanical design includes a fixture base and a workpiece positioning element, a clamping device and a guiding device arranged on the fixture base. The workpiece positioning element includes a support plate for placing and positioning the workpiece and a supporting pin for limiting the horizontal freedom of the workpiece. The clamping device is a rotary oil cylinder that drives a rotating pressure plate to enable the workpiece to be firmly fixed on the fixture base during processing. The guiding device is a boring die bracket connected to the fixture base through a positioning pin and a hexagonal bolt, and then connected to the boring die bracket through a boring sleeve, a bushing for the boring sleeve, and a boring sleeve screw.

[0008] As a preferred technical solution of the present invention, the clamp body base is provided with positioning pin holes to ensure accurate positioning of the boring die bracket and the positioning bracket therewith, and the boring die bracket and the positioning bracket are provided with positioning holes through which the positioning pins pass.

[0009] As a preferred technical solution of the present invention, the base of the clamping body is provided with the boring die bracket, positioning bracket, angle cylinder, supporting plate and threaded holes for accurate installation of eye screws therewith, and the boring die bracket, positioning bracket and supporting plate are provided with through holes for hexagonal head bolts to pass through.

[0010] As a preferred technical solution of the present invention, the clamp body base is provided with through holes and reinforcing rib structures for mounting the support pins.

[0011] As a preferred technical solution of the present invention, the base of the clamp body is provided with the boring die bracket, the positioning bracket, the support plate and the boss structure of the contact portion of the lifting eye screw and the boring die bracket.

[0012] As a preferred technical solution of the present invention, the boring die bracket is provided with a through hole and a reinforcing rib structure for mounting the boring die bracket with the bushing for the boring sleeve.

[0013] As a preferred technical solution of the present invention, the positioning bracket is provided with a through hole and a reinforcing rib structure for mounting the positioning bracket with the supporting pin.

[0014] As a preferred technical solution of the present invention, the clamping device includes structures such as an angle cylinder, a rotating pressure plate, and a pressure block made of rubber material.

[0015] As a preferred technical solution of the present invention, the angle oil cylinder includes a piston rod, a clamping nut and a latch, and the rear end of the rotary pressure plate is rotationally connected to the piston rod through the latch and fastened with a clamping nut.

[0016] As a preferred technical solution of the present invention, a pressure block made of rubber material is provided at one end of the rotating pressure plate that contacts the workpiece.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention fixes the workpiece by means of hydraulic clamping provided by the angle oil cylinder, so that the workpiece can be more stable during the processing, the processing accuracy of the workpiece is improved, and the working conditions of the workers are also improved.

[0019] 2. The present invention provides a rubber pressure block at the contact end between the rotating pressure plate of the clamping device and the workpiece, thereby reducing excessive deformation of the workpiece caused by the clamping force during processing and effectively protecting the workpiece to be processed.

[0020] 3. The present invention arranges the appearance and positional relationship of each component part by design and manufactures them separately, so that the clamp body is simple to install and easy to operate, which correspondingly reduces the time cost and improves the economic benefit. Description of the drawings:

[0021] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the clamping device of the present invention;

[0024] In the figure: 1. boring die bracket; 2. clamping base; 3. lifting eye screw; 4. boring sleeve; 5. angle cylinder; 6. rotating pressure plate; 7. supporting pin; 8. supporting plate; 9. positioning bracket; 10. angle cylinder body; 11. plug; 12. clamping nut; 13. pressure block; 14. piston rod. Specific implementation method:

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] like Figure 1 As shown, this specific embodiment adopts the following technical scheme: a tooling fixture for mechanical design, including a fixture base 2 and a workpiece positioning element, a guide device and a clamping device arranged on the fixture base. The workpiece positioning element includes a support pin 7 arranged on the fixture base for limiting the horizontal freedom of the workpiece, and the fixture base is provided with a boss structure for installing a support plate 8 for supporting the bottom of the workpiece. The reasonable setting of the positioning element is used to limit the six degrees of freedom of the workpiece, and at the same time increases the force area between the bottom of the workpiece and the fixture, so that the workpiece can be more stable after being pressed by the rotating pressure plate. The guide device of the workpiece includes a boring die bracket 1 arranged on the fixture base, which is accurately positioned by a positioning pin and connected and fastened with a hexagonal bolt; the boring sleeve 4 is connected to the boring die bracket by a bushing for the boring sleeve through cooperation, so as to limit and determine the direction of the boring tool during workpiece processing. A calibrating base surface is provided on the side of the fixture base to facilitate the assembly and manufacture of the tooling fixture. Two oil supply holes are arranged on the side of the clamp body base to facilitate connection with the oil supply holes on the corner oil cylinder, thereby completing the clamping and loosening actions of the workpiece.

[0027] like Figure 1 As shown, eye screws are provided at the four corner positions of the clamp body base, so as to facilitate the movement and installation of the fixture to meet different requirements when processing the workpiece.

[0028] like Figure 1As shown, bosses are provided at the contact points between the clamp base 2 and the positioning bracket 9, the boring die bracket 1, the corner cylinder 5 and the eye screw 3, and a groove is provided at the bottom of the clamp base to reduce its processing surface, which is beneficial to make the workpiece more stable during the processing and ensure the processing accuracy of the workpiece.

[0029] like Figure 2 As shown, the workpiece clamping device includes an angle oil cylinder body 10 arranged on the base of the clamp body, the angle oil cylinder is connected and fastened by a hexagonal bolt, a piston rod 14 is inserted inside the angle oil cylinder, and a rotating pressure plate 6 is connected to the piston rod by a clamping nut 12, and a pressure block 13 is installed at the end of the rotating pressure plate that contacts the workpiece. Specifically, the rotating pressure plate and the piston rod are rotatably connected by a latch to ensure that the rotating pressure plate and the piston rod can rotate synchronously.

[0030] The pressing block is made of rubber material, which makes the contact between the clamping device and the workpiece closer during operation, thereby reducing the influence of the clamping force on the machining accuracy of the workpiece.

[0031] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only a simplified description for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, for example, the clamping device is driven by a hydraulic cylinder, or may be driven by an air cylinder, and the air cylinder is rotatably connected to the rotating pressure plate to achieve the clamping and loosening of the workpiece.

[0033] In summary, the present invention provides a fixture for mechanical design, including a clamping base and a workpiece positioning element, a clamping device and a guiding device arranged on the clamping base. The workpiece positioning element includes a support plate for placing and positioning the workpiece and a supporting pin for limiting the horizontal freedom of the workpiece. The clamping device is a rotary cylinder that drives a rotating pressure plate to move so that the workpiece can be firmly fixed on the clamping base during processing. The guiding device is a boring die bracket connected to the clamping base through a positioning conical pin and a hexagonal bolt, and then connected to the boring die bracket by a boring sleeve, a bushing for the boring sleeve, and a boring sleeve screw. The parts of the present invention are manufactured separately and have a compact structure, which can ensure that the workpiece can remain stable during the mechanical processing process and reduce the influence of vibration and deformation on the processing accuracy. The present invention uses a hydraulic clamping method and a rubber material pressure block structure at the contact between the rotating pressure plate and the workpiece, which can solve the technical problems of instability of the workpiece during processing and the influence of the processing accuracy of the workpiece due to excessive deformation, and can correspondingly reduce labor costs and improve economic benefits.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixture for mechanical design, comprising a fixture base (2), characterized in that: A boss structure is fixed in the middle position of the clamp body base (2), and threaded holes and through holes are arranged on the boss. Four of the threaded holes are connected with hexagonal bolts for fixing two support plates (8), and two of the through holes are connected with two support nails (7). The clamp body base (2) is provided with threaded holes and positioning pin holes for connecting and positioning with the positioning bracket (9), and the four threaded holes are connected with hexagonal bolts for fixing the positioning bracket (9). Two of the positioning pin holes are connected with two positioning pins for positioning the positioning bracket (9), and the positioning bracket (9) is provided with through holes for connecting the supporting nails (7).

2. A mechanical design fixture according to claim 1, characterized in that: The clamp base (2) is provided with threaded holes and positioning pin holes for connecting and positioning with the boring die bracket (1); four of the threaded holes are connected with hexagonal bolts for fixing the boring die bracket (1); two positioning pin holes are connected with two positioning pins for positioning the boring die bracket (1); and the boring die bracket (1) is provided with through holes and threaded holes for matching the boring sleeve bushing and the boring sleeve (4) and fastening the boring sleeve screws.

3. A mechanical design fixture according to claim 1, characterized in that: The clamp base (2) is provided with threaded holes for installing the angle cylinder (5), and the four threaded holes are connected with hexagonal bolts for fixing the angle cylinder body (10), and a piston rod (14) is provided inside the angle cylinder body (10) for rotational connection with the rotating pressure plate (6) through a latch, and an oil supply hole is provided on the side of the angle cylinder body (10) for the entry and exit of hydraulic oil.

4. A mechanical design fixture according to claim 1, characterized in that: The clamp body base (2) is provided with an oil circuit for the flow of hydraulic oil, which is used for connecting a hydraulic device.

5. A mechanical design fixture according to claim 1, characterized in that: The end of the rotating pressing plate (6) in contact with the workpiece is provided with a pressing block made of rubber material.

6. A mechanical design fixture according to claim 1, characterized in that: Threaded holes are arranged at four corner positions of the clamp body base (2), and the four threaded holes are connected with eye screws (3).

7. A mechanical design fixture according to claim 1, characterized in that: A boss is provided at the contact point between the clamp body base (2) and the positioning bracket (9), the boring die bracket (1), the corner oil cylinder (5) and the eye screw (3), and a groove is provided at the bottom of the clamp body base (2).

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