CN203556893U - Telescopic rotatable mechanical clamping and fixing cutter - Google Patents

Abstract

The utility model belongs to the technical field of mechanical processing, in particular to a retractable and rotatable mechanical clamping tool. The tool includes a large knife rod installed on a knife holder, the large knife rod is cylindrical, and the outer surface of the large knife rod is provided with two parallel cut surfaces, the knife holder fixes the large knife rod through the parallel cut surfaces, and the large knife rod is provided with a deviation from the large knife rod The middle hole of the central axis is provided with a retractable and rotatable small knife rod, the end of the small knife rod is provided with a cutter head for cutting parts, and the large knife rod is provided with at least one countersunk screw abutting against the small knife rod. The beneficial effects of the utility model are: the tool is rotatable and expandable, and is used for turning the inner and outer circles and end faces, especially suitable for machining step holes with different depths and large differences in hole diameters and machining outer diameters larger than the carriage in the lathe It is flexible and convenient to use for the workpiece with the largest rotary diameter of the workpiece.

Description

A retractable and rotatable mechanical clamping tool

technical field

The utility model belongs to the technical field of mechanical processing, in particular to a retractable and rotatable mechanical clamping tool.

Background technique

Turning is a cutting process that uses the rotary motion of the workpiece and the linear or curved motion of the tool on the lathe to change the shape and size of the blank and process it to meet the requirements of the drawing. Turning is the most basic and common cutting method, and it is the most widely used one in the machine manufacturing industry. The number of lathes is large, the number of personnel is large, and the processing range is wide. Turning occupies a very important position in production. Turning is suitable for machining rotary surfaces. Most workpieces with rotary surfaces can be processed by turning methods, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, end faces, grooves, threads, and rotary forming surfaces. The tools used are mainly turning tools. The processing of inner and outer cylindrical surfaces and end faces is the most basic and most frequently used processing in turning. The turning tools used are outer circle turning tools and inner hole turning tools. The outer turning tool is highly versatile, and both large and small diameters can be processed with the same turning tool. The inner hole turning tool is different. During production, the corresponding inner hole turning tools should be made according to the size, shape, depth, processing material, and processing properties of the inner hole, which requires different thicknesses and lengths. There are many inner hole turning tools with different tool materials, which is not conducive to tool management. In the past, the production of inner hole tools was integral, and a tool could only turn a small range of inner holes.

For example, a type of inner hole tool, the front part of the tool bar section is square or circular, and the rear part is square, and the rigidity of the tool bar is poor. If the inner hole of this kind of inner hole tool becomes smaller and the depth becomes deeper, the tool may be damaged. It is no longer suitable for turning the inner hole, and the rigidity of the tool bar is poor, which can only be solved by replacing the corresponding inner hole tool, and the processing range is very small; there is another type of integral inner hole tool with a square or rectangular section of the tool bar. The thickness is the same, the rigidity of the tool bar is better than that of the former type of tool, the extension length of the tool bar can be adjusted according to the depth of the inner hole during turning, and the processing range is expanded; there is also a type of inner hole tool, which is a typical tool used in machining. The retractable and rotatable inner hole tool can only solve the problem of the expansion and rotation of the tool rod, that is, according to the depth of the processed hole and the actual situation of the part processing, the tool rod can be adjusted through the expansion and rotation of the tool rod The conversion of the protruding length and the rake angle and back angle of the tool. However, since the tip of the tool is not at the forefront, it is inconvenient or even impossible to process step holes with different sizes and depths of end faces and apertures and workpieces whose outer diameter is larger than the maximum turning diameter of the workpiece on the carriage in the lathe. , the use function is relatively simple.

A kind of retractable, rotatable inner hole cutter is provided now, as a kind of sleeve type deep hole cutter provided by the Chinese invention patent of CN103143738A as publication number, it comprises cutter bar body, and the front part of described cutter bar body has A cutter head installation part, a cutter head is installed on the cutter head installation part, and at least one bushing for supporting the cutter rod body is fixedly installed on the cutter rod body, and the bushing is sleeved on the cutter rod body superior. Through the supporting effect of the shaft sleeve, the strength of the cutter body is enhanced, so that the cutter rod is not easily deformed under the action of high-speed rotation or high torque. Since the tip of the tool is not at the forefront, it is inconvenient or even impossible to process step holes with different sizes and depths of end faces and apertures, and workpieces whose outer diameter is larger than the maximum turning diameter of the workpiece on the carriage in the lathe. The use function is relatively simple.

Utility model content

The utility model mainly aims at the problem of single function and inconvenient use existing in the existing inner hole cutter, and provides a retractable and rotatable mechanical clamping cutter which is retractable, rotatable, and can adjust the front and rear angles of the cutter.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a retractable and rotatable mechanical clamping tool, which includes a large tool rod installed on the tool holder, the large tool rod is cylindrical, and the outer surface of the large tool rod There are two parallel cut surfaces on the side, and the tool holder fixes the large knife rod through the parallel cut surfaces. The large knife rod is provided with a middle hole deviated from the central axis of the big knife rod, and a retractable and rotatable small knife rod is arranged in the middle hole. The small knife rod A cutter head for cutting parts is provided at the end of the cutter head, and at least one countersunk screw abutting against the small cutter holder is arranged on the large cutter holder. The tool is retractable, that is, the small knife rod can be stretched out from the large knife rod, or can be retracted into the large knife rod; it can be rotated, that is, the small knife rod can be rotated in the large knife rod, and the rake angle and rear angle of the tool can be adjusted by rotating Size conversion to suit processing needs. During the processing, you can decide whether to extend the small knife rod and how long it should be extended according to the size and depth of the hole; according to the actual working conditions of the processed hole, such as whether to cut intermittently, the hardness of the workpiece, and the difficulty of cutting the workpiece material The degree and other conditions determine whether the small knife rod needs to be rotated. The tool can be used for machining end faces, step holes with different diameters and depths, and workpieces whose outer diameter is larger than the maximum turning diameter of the workpiece on the carriage in the lathe, and is flexible and convenient to use.

Preferably, the diameter of the middle hole is slightly larger than the outer diameter of the small knife rod, and the small knife rod is located in the middle hole and connected with the large knife rod in a clearance fit. The small knife rod and the large knife rod are connected by clearance fit, and the small knife rod can be stretched or rotated in the middle hole according to the needs of use.

Preferably, a chamfer is provided between the parallel beveled surface and the outer end surface of the large cutter bar. The size of the chamfer can be customized according to the thickness of the large tool bar, which is beneficial to reduce the interference phenomenon in the turning process and expand the processing range.

Preferably, a slope is provided between the side of the large knife rod away from the middle hole and the outer end surface of the large knife rod. The inclined surface is beneficial to reduce the interference phenomenon in the turning process and expand the processing range.

Preferably, there are two countersunk screws, one countersunk screw is arranged on the middle side of the large cutter bar, and the other countersunk screw is arranged on the inclined surface. Two countersunk screws, the clamping and fixing are firm and reliable, and the small knife rod is not easy to loosen.

Preferably, the cutter head is fixed on the end of the small cutter rod by a compression screw. After the cutter head is damaged, it can be turned again only by turning the position and re-tightening the screw. Different tool materials can also be selected according to different workpiece materials, hardness and processing properties.

Therefore, the beneficial effects of the utility model are: the tool is rotatable and scalable, and is used for turning the inner and outer circles and end faces, and is especially suitable for machining step holes with different depths and large differences in hole diameters and machining outer diameters larger than those of lathes. The workpiece with the largest rotary diameter on the carriage is flexible and convenient to use.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the utility model;

Accompanying drawing 2 is A-A sectional view among accompanying drawing 1;

Accompanying drawing 3 is B-B sectional view among accompanying drawing 1.

As shown in the figure: 1-big knife holder, 2-medium hole, 3-small knife holder, 4-knife head, 5-countersunk screw, 6-bevel.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example:

As shown in Figures 1 and 3 of the description, a retractable and rotatable mechanical clamping tool includes a large tool bar 1 installed on the tool holder. The large tool bar 1 is cylindrical, and the outer surface of the large tool bar 1 is provided with two Parallel beveled surface, the tool holder fixes the large knife bar 1 through the parallel beveled surface, and there is a chamfer between the parallel beveled surface and the outer end surface of the large knife bar 1, and the middle hole 2 deviated from the central axis of the large knife bar 1 is provided inside the large knife bar 1, and the middle hole 2 A retractable and rotatable small knife rod 3 is provided. The aperture of the middle hole 2 is slightly larger than the outer diameter of the small knife rod 3. The small knife rod 3 is located in the middle hole 2 and is connected with the large knife rod 1 for clearance fit. The end of the small knife rod 3 There is a cutter head 4 for cutting parts, and the cutter head 4 is fixed on the end of the small cutter bar 3 by a compression screw, and the large cutter bar 1 is provided with at least one countersunk screw 5 abutting against the small cutter bar 3, as shown in the accompanying drawing 2 of the specification As shown, a slope 6 is provided between the side away from the middle hole 2 and the outer end surface of the large knife bar 1 on the big knife bar 1, there are two countersunk screws 5, and one countersunk screw 5 is arranged on the middle side of the big knife bar 1, Another countersunk screw 5 is arranged on the ramp 6 .

1. Structural shape: The tool is composed of a large tool holder and a small boring tool.

1) Small boring tool: a. The boring tool is a mechanically clamped indexable tool, which has basically been standardized. You can choose tools with different thickness, cutter head shape and cutter head material according to the different processing contents of the workpiece.

b. The height of the cutter head is flush with the axis of the small cutter rod, which is conducive to maximizing the rigidity of the cutter rod.

c. The tip of the tool is at the front end of the tool bar, which is beneficial to the turning process and reduces the occurrence of interference during the process.

d. During the processing, if the cutter head wears out, just turn one position and re-tighten the screw to continue processing.

e. The outer diameters of the large tool holder and the small tool holder have a clearance fit and can be slidably matched. By turning the small tool holder, the conversion of the rake angle and rear angle of the tool can be realized.

2) Large cutter bar: a. The material of the big cutter bar is 45# round steel, which is more economical and practical, and other materials such as Cr12 are also acceptable.

b. The shape of the large knife rod is a cylinder, and the upper and lower sides are processed and flattened, which is beneficial to the clamping screw of the tool holder; the front part has two internal threads for locking the small knife rod and is processed with an angle of α There are R angles on both sides, and the size of the R angle can be determined according to the thickness of the large tool bar, which is beneficial to reduce the interference phenomenon in the turning process and expand the processing range; there is a middle hole and a small tool bar for sliding matching; one side wall thickness It is about 1.5+0.50, which is beneficial for the tip of the tool to be at the forefront, which brings convenience to the turning process and can also reduce the interference phenomenon during the turning process.

2. Tool features: scalable and rotatable. Retractable, that is, the small knife rod can be stretched out from the large knife rod, or can be retracted into the large knife rod; rotatable, that is, the small knife rod can be rotated in the large knife rod, and the rake angle and back angle of the tool can be adjusted by rotating Conversion to suit processing needs. During the processing, you can decide whether to extend the small knife rod and how long it should be extended according to the size and depth of the hole; according to the actual working conditions of the processed hole, such as whether to cut intermittently, the hardness of the workpiece, and the difficulty of cutting the workpiece material The degree and other conditions determine whether the small knife rod needs to be rotated.

3. Range of use: Compared with the previous tools, this tool has a wide range of processing and is a multi-purpose tool. Specifically, the following functions have been added or improved:

1) The tool can not only turn the inner hole, but also turn the outer circle and end face, especially suitable for turning parts whose diameter is larger than the maximum turning diameter of the workpiece on the transverse carriage of the lathe;

2), the tool can not only forward feed turning, but also reverse feed turning;

3) According to the size of the hole, the tool can conveniently select the inner tool holder or the complex of inner and outer tool holders to process the inner hole;

4) On the basis of the original welding, the tool is changed to a mechanically clamped indexable tool. The tool head is blunt. You only need to turn a position and re-press the screw to turn it again. It can also be turned according to different workpiece materials and hardness. , Processing properties to choose different tool materials;

5) The tool is suitable for machining step holes with large differences in hole diameter and different depths, which is very convenient and flexible.

The tool is rotatable and telescopic, and can be used for boring small holes and large holes; it can be used for boring shallow holes and deep holes; It can also feed in reverse; it can also turn the outer circle and end face; and after the cutter head is damaged, it can be reused only by turning a position, which is very flexible and convenient, and overcomes the unfavorable phenomenon of single function in the past.

It should be understood that this embodiment is only used to illustrate the utility model but not to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Claims (6)

1. a scalable rotatable mechanical clamped tool, it comprises the large knife bar (1) being arranged on knife rest, large knife bar (1) is cylindric, the lateral surface of large knife bar (1) is provided with two parallel bevels, knife rest is by the fixing large knife bar (1) of parallel bevel, it is characterized in that, in described large knife bar (1), be provided with the mesopore (2) that departs from large knife bar (1) central axis, in mesopore (2), be provided with scalable and rotating little knife bar (3), the end of little knife bar (3) is provided with the cutter head (4) of machined part, large knife bar (1) is provided with the sunk screw (5) of at least one and little knife bar (3) butt.

2. the scalable rotatable mechanical clamped tool of one according to claim 1, is characterized in that, the aperture of mesopore (2) is slightly larger than the external diameter of little knife bar (3), and little knife bar (3) is positioned at mesopore (2) and is connected for matched in clearance with large knife bar (1).

3. the scalable rotatable mechanical clamped tool of one according to claim 1 and 2, is characterized in that, between parallel bevel and the outer face of large knife bar (1), is provided with chamfering.

4. the scalable rotatable mechanical clamped tool of one according to claim 1 and 2, is characterized in that, the upper side away from mesopore (2) of large knife bar (1) is provided with inclined-plane (6) between the outer face of large knife bar (1).

5. the scalable rotatable mechanical clamped tool of one according to claim 4, it is characterized in that, described sunk screw (5) has two, and a sunk screw (5) is arranged in the medial side face of large knife bar (1), and another sunk screw (5) is arranged on described inclined-plane (6).

6. the scalable rotatable mechanical clamped tool of one according to claim 1 and 2, is characterized in that, described cutter head (4) is fixed on the end of little knife bar (3) by housing screw.

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