CN104741950A - Burr-free cutting clamp based on support - Google Patents

Abstract

The invention discloses a burr-less and burr-free cutting fixture based on a support body, which includes a fixture base, a positioning bolt, and a support body. Two clamps for clamping workpieces are arranged horizontally at opposite ends of the fixture base. The positioning bolt is vertically penetratingly arranged at the bottom of the fixture base, and the supporting body is arranged between the processing end of the workpiece and the clamping block. After clamping, the workpiece and the supporting body can be clamped at the same time for cutting. The workpiece The position of the support body and the support body can be adjusted respectively in the horizontal direction and the vertical direction through the handle and the positioning bolt as required. According to the shape and size of the workpiece and the supporting body, the present invention can combine and adjust the position of the positioning bolt and the clamping block, realize the less burr-free processing of the workpieces of different shapes and sizes, save the cost and time of trimming the supporting body, and improve the production efficiency.

Description

A less burr-free cutting fixture based on support body

technical field

The invention relates to the field of positioning and clamping in the field of metal cutting, in particular to a cutting fixture with few burrs and no burrs based on a support body.

Background technique

The formation of metal cutting burrs is a normal and common phenomenon caused by the plastic deformation of materials in the metal cutting process. Its formation and change directly affect the processing quality and processing efficiency of parts, and it has become increasingly important for precision, ultra-precision processing and A major challenge for automated machining. According to relevant investigations and studies, during the cutting process of parts, the processing time and processing cost spent in the deburring process can be as high as 30% of the processing cost of the entire part, such as precision parts such as aircraft engine parts. For a part of medium complexity, the processing cost of deburring will also reach 15%-20%. Deburring is an additional processing process of no economic value, which reduces the processing quality and processing efficiency of parts. However, if the burrs on the workpiece cannot be effectively controlled or removed, it will bring great harm to the manufacturer. Cutting with the support method can effectively control the formation of burrs in the cutting process and reduce the harm of burrs. However, for parts with special shapes, the support body method cannot be directly applied in the cutting process, and the shape of the support body often needs to be trimmed in advance, which greatly increases the workload. And a suitable fixture can directly realize the positioning and clamping of the workpiece and the support body without additional support body trimming process.

Contents of the invention

In view of the above technical problems, the present invention aims to solve the above technical problems at least to a certain extent.

The object of the present invention is to provide a cutting fixture with few burrs and no burrs, which is simple in structure, convenient in operation and can effectively reduce burrs in workpiece processing.

To achieve the above object, the present invention proposes the following technical solutions:

A cutting fixture with less burrs and no burrs based on a support body, comprising a fixture base, positioning bolts, and a support body, two clamping blocks for clamping workpieces are horizontally arranged at both ends of the fixture base, and the The positioning bolts are arranged vertically through the bottom of the fixture base, and the supporting body is arranged between the processing end of the workpiece and the clamping block. After clamping, the workpiece and the supporting body can be clamped at the same time for cutting. The workpiece and the supporting body can The positions in the horizontal direction and the vertical direction are respectively adjusted through the handle and the positioning bolt as required.

Further, the clamp block includes a screw part and a clamping head that is in close contact with the workpiece. The screw part is matched with the screw holes at both ends of the fixture base, and the position of the clamping head is adjusted by rotating the screw part. That is, the position can be adjusted, and the flexible positioning of the workpiece and the support body in the horizontal direction can be realized.

Further, a detachable handle is provided through one end of the threaded rod part, which can avoid unnecessary interference during cutting.

Further, the two ends of the clamp base are parallel to each other, which is convenient to be directly clamped by the clamps of the planer and the milling machine and then used in the cutting process.

Compared with the prior art, the invention has the advantage of realizing the separate positioning and joint clamping of workpieces and support bodies of different shapes and sizes during the cutting process. Specifically, by adjusting the positioning bolts, the respective vertical positioning of the workpiece and the supporting body can be realized. By rotating the handle to adjust the horizontal position of the clamping block, the horizontal positioning and clamping of the workpiece and the supporting body can be realized. According to the specific shape and size of the workpiece and the support body, the positioning in the horizontal direction and the vertical direction can be flexibly combined and adjusted, which can realize the positioning in various cutting environments, greatly save the cost and time of support body trimming, and improve production efficiency. At the same time, this The invention improves the support rigidity of the end surface of the workpiece by adding a support body, and suppresses the formation of a negative shear zone during the cutting process, so that cutting burrs are directly suppressed and difficult to form during the cutting process. The supporting body can be flexibly selected according to different cutting materials, which makes the present invention applicable to the cutting process of any cutting materials. According to the invention, the formation of negative burrs in the cutting process can be completely suppressed, the size of the burrs formed in the cutting process can be greatly reduced, and the height and thickness of the burrs can be reduced by more than 80%.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of groove processing with few burrs and no burrs according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of planing with less burrs and no burrs according to the embodiment of the present invention.

In the figure: 1-fixture base; 2-handle; 3-clamp block; 4-workpiece; 5-support body; 6-locating bolt; 7-tool.

Detailed ways

The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

As shown in Fig. 1, a cutting fixture with less burrs and no burrs based on a support body includes a fixture base 1, a positioning bolt 6, and a support body 5, and two ends of the fixture base 1 are relatively horizontally arranged with two For the clamp block 3 clamping the workpiece 2, the positioning bolt 6 is arranged vertically through the bottom of the fixture base 1. The positioning bolt 6 can be a standard part, which can be adjusted according to the shape and relative position of the workpiece 4 and the support body 5. And flexible selection of processing requirements. The support body 5 is set between the processing end of the workpiece 2 and the clamping block 3. After clamping, the workpiece and the support body can be clamped for cutting at the same time. The workpiece and the support body can be adjusted according to the needs through the handle and the positioning bolt. orientation and vertical position.

Specifically, the clamping block 3 includes a screw part 32 and a clamping head 31 that is in close contact with the workpiece 2. The screw part 32 is matched with the screw holes at both ends of the fixture base 1, and can be adjusted by rotating the screw part 32. The position of the clamping head 31 can be adjusted by turning, which can realize the flexible positioning of the workpiece and the support body in the horizontal direction.

Specifically, a detachable handle 2 is provided through one end of the threaded shaft part 32 , so as to avoid unnecessary interference during cutting.

Specifically, the two ends of the clamp base 1 are parallel to each other, which is convenient to be directly clamped by the clamps of planer and milling machine and applied in the cutting process.

Take the application in the processing of stainless steel grooved plate as an example:

The workpiece 4 is made of 304 stainless steel with a size of 45×15×50mm, and the material of the support body 5 is 45# steel with a size of 15×35×50mm.

According to the combined size of the workpiece 4 and the support body 5 , an appropriate support-based cutting fixture with less burrs and no burrs is selected, and positioned and clamped on the machine tool corresponding to the processing technology.

When clamping, according to the shape and size of the workpiece 4 and the support body 5, the positioning bolt 6 is pre-adjusted for rough positioning, and the handle 2 is rotated so that the clamp block 3 pre-clamps the workpiece 4 and the support body 5.

According to processing requirements, adjust the height and relative height of the workpiece 4 and the support body 5 through the positioning bolt 6, and rotate the handle 2 to clamp the workpiece 4 and the support body 5 after leveling.

In this embodiment, through the flexible combination of the adjusting handle and the positioning bolt, the positioning and clamping of workpieces and supporting bodies with different sizes and materials are realized. Subsequent processing only needs to be done by machine tools to complete the processing of the grooves.

In another embodiment, copper trenches are machined using the present invention. The material to be processed is pure copper, which has high heat and mass transfer performance. It is often used in the research of enhanced heat transfer and the preparation of thermal superconductor components. Copper material is extremely plastic, and under normal cutting conditions, it is easy to form larger-sized burrs, and the hardness of the burrs is much higher than that of the body material.

As shown in Figure 2, the processing of pure copper grooved plate includes:

1) According to the material of the workpiece 4, the material of the support body 5 is selected as Al-6061 aluminum alloy, and the size of the support body 5 is selected according to the forming size of the part, and clamped by a planer vise;

2) According to the specific processing requirements, the tool 7 is a multi-tooth tool with a tooth pitch and tooth width of 1mm, a rake angle of the tool is 10°, and a tool rear angle is 8°;

3) According to the specific processing requirements, the selected cutting speed is 0.11m/s, and the cutting depth is 0.2mm;

4) According to the characteristics of the formed part, the knife is fed 5 times downward during the cutting process, so that the groove depth is 1mm;

During the cutting process, grooves appear on both the support body 5 and the workpiece 4, and the terminal surface of the obtained part has only extremely small burrs, and the height of the burrs is less than 0.1 mm, which is beneficial to subsequent processing.

In another embodiment, the plane of an aluminum alloy part is planed by using the present invention. The material to be processed is Al-6061 aluminum alloy, which is a high-quality magnesium-aluminum alloy commonly used in industry. It is widely used in equipment manufacturing, automobile production, and structural parts of various electrical components. The material is easy to form larger-sized burrs and even negative burrs when it is cut without a support.

As shown in Figure 3, the less burr-free processing technology provided in this embodiment is applied to the planing processing of aluminum alloy parts, and the steps include:

1) According to the material of the workpiece 4, the support body 5 is selected as Al-6061 aluminum alloy, the size of the support body is selected according to the forming size of the part, and it is directly clamped by the planer vise;

2) According to the specific processing requirements, the cutter 7 selects a sharp planing cutter with a rake angle and a rear angle of 10°;

3) Set the cutting speed to 0.1m/S and the cutting depth to 0.2mm;

4) Start the planer to complete the cutting process.

During the cutting process, both the workpiece 4 and the support body 5 are processed by the tool 7, the processed surface of the obtained workpiece 4 has a high surface finish, the negative burr that occurs under the cutting condition without the support body is suppressed, and the height of the burr is less than 0.01 mm.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (4)

1. the few impulse-free robustness clamp for cutting based on supporter, it is characterized in that: comprise clamp base (1), bolt (6), supporter (5), the two ends of described clamp base (1) are relatively horizontally disposed with two fixture blocks for clamping work pieces (2) (3), described bolt (6) is vertically penetratingly arranged at clamp base (1) bottom, and described supporter (5) is arranged at and between the processing end of workpiece (2) and fixture block (3).

2. the few impulse-free robustness clamp for cutting based on supporter according to claim 1, it is characterized in that: described fixture block (3) comprise screw mandrel portion (32), with the clamping head (31) of workpiece (2) close contact, described screw mandrel portion (32) is matched with the screw at clamp base (1) two ends, is regulated the position of clamping head (31) by rotary screw rod portion (32).

3. the few impulse-free robustness clamp for cutting based on supporter according to claim 2, is characterized in that: described screw mandrel portion (32) one end is run through and is provided with detachable handle (2).

4. the few impulse-free robustness clamp for cutting based on supporter according to claim 3, is characterized in that: the two ends of described clamp base (1) are parallel to each other.