CN210817498U - A three-layer stepped large-diameter boring tool for machining the front casing of the transmission case - Google Patents

Abstract

The utility model relates to a three-layer stepped large-diameter boring tool for machining the front casing of a transmission case, which mainly consists of a first layer of a tool body, a boring tool slide, a boring tool seat, a slider bolt, a tool seat bolt, a diameter adjustment The bolt, the second layer of cutter body, the third layer of cutter body 11 and the cutter body bolt are formed. The utility model can simultaneously process three stepped inner holes with different diameters by using the tool, and at the same time, each layer of the tool body adopts a sleeve type hollow tool body, which is light in weight and simple in structure, and each layer of the tool body adopts the same size of boring tool sliders And the boring tool holder, the module is unified standard, with modularization and adjustability, and the processing depth of each hole can also be adjusted, the production is convenient, and the cost is low, so as to achieve the purpose of processing three large-diameter inner holes with one tool. The inner hole has high coaxiality and good consistency.

Description

A three-layer stepped large-diameter boring tool for machining the front casing of the transmission case

technical field

The utility model relates to a boring tool for machining large-diameter stepped inner holes, in particular to a three-layer stepped large-diameter boring tool for machining a front casing of a transmission.

Background technique

Boring tool is a kind of boring tool, which is widely used for roughing, semi-finishing or finishing of existing holes in CNC machining. The general processing range is from 4mm to 200mm, etc. Knife. For processing the stepped inner hole of the front housing of the transmission with a diameter of about 300mm, multiple boring tools are generally used for multi-sequence processing. However, this boring tool is heavy in structure, heavy in weight, and expensive. At the same time, multi-sequence processing is likely to cause the holes to be coaxial. The accuracy is reduced and unstable, which leads to a decline in product quality and a high scrap rate.

Chinese patent CN104646699B discloses an adjustable double-edged large-diameter boring tool with tooth pattern meshing structure, including a bridge body arranged on the handle of the boring tool, two tool seats symmetrically installed at both ends of the bridge body, and a tool head, a bridge The two sides of the body are respectively provided with a v-shaped groove and a first tooth groove, the part where the knife seat is connected with the bridge body is provided with a second tooth groove, and the knife seat and the knife head are provided with a third tooth groove. The invention can quickly realize the double-edged large-diameter boring tool for adjusting the boring tool, improve the cutting precision and work efficiency, and ensure the service life of the large-diameter boring tool. The boring tool holder is symmetrically installed at both ends of the bridge body, but the tool holder block is large and heavy, and can only process one diameter at a time, so the versatility is low.

Chinese patent CN104646699B discloses an adjustable large-scale boring tool, which includes a boring plate, two adjustment seats and two boring tool seats. The two adjusting seats are symmetrically installed on both ends of the boring plate, the boring tool seat and the adjusting seat can be relatively fixed, the boring head hole is opened at the end of the boring tool seat, the structure is simple and ingenious, the whole is light and flexible, and has high adjustment accuracy. Said is a large boring tool used for processing the hole diameter larger than 1400mm. The cutter body is a bridge type, but it is also too bulky and can only process one diameter at a time.

Chinese patent CN202239688U discloses a boring disc. A support pad is fixed on the outer circumferential surface of the boring disc. The extended length is not less than half of the thickness of the boring disc. In the boring disc and the boring tool assembly of the present invention, the boring process can be increased by increasing the thickness of the boring disc and increasing the support pad. The contact surface between the middle boring tool disc and the inner wall of the hole increases the straightness and stability of the boring tool assembly during the boring process, and thus reduces the wall thickness difference of the workpiece such as the cylinder barrel obtained by processing. The above-mentioned boring cutter disc structure with supporting pads added around is adopted, but the supporting pads are easy to wear, and the cutter body is thick, heavy, and relatively simple in workability.

SUMMARY OF THE INVENTION

The purpose of this utility model is to aim at the above-mentioned deficiencies of the prior art, and to provide a boring tool for machining the large-diameter stepped inner hole of the front casing of the transmission case, which solves the problem of the need for multiple clampings in the machining of the large-diameter inner hole of the existing parts. In addition, the coaxiality of each hole is unstable, and the large-diameter boring tool is expensive and heavy, and a tool can only process one size and does not have the problems of interchangeability and versatility.

The purpose of this utility model is to realize through the following technical solutions:

A three-layer stepped large-diameter boring tool used for processing the front casing of a transmission case, which mainly consists of a first layer of tool body 1, boring tool slide 2, boring tool seat 3, slider bolt 4, tool seat bolt 5, diameter The adjusting bolt 6, the second-layer cutter body 10, the third-layer cutter body 11 and the cutter body bolt 12 are constituted;

The first-layer cutter body 1 is used to process the first-layer large-diameter inner hole, and two boring cutter slides (2) are connected on the symmetrical sides of the cutter body. Axial sliding is performed to adjust the axial spacing size; the boring tool holder 3 is connected with the boring tool slide 2 through the tool holder bolt 5, and the boring tool slide 2 has two sliding keyways and the boring tool holder 3. With radial sliding fit, the axial machining dimensional accuracy can be adjusted through the diameter adjustment bolt 6;

The two sides of the second-layer cutter body 10 are also connected to the two boring cutter slides 2 and the boring cutter holder 3, and at the same time form an angle of -45° with the first-layer cutter body 1, which is used for machining the second-layer large cutter. Diameter bore;

The third-layer cutter body 11 is fixedly connected to the second-layer cutter body 10 through cutter body bolts 12 , and two boring tool holders 3 are connected on the symmetrical sides of the third-layer cutter body 11 , and are connected to the first-layer cutter body 1 at the same time. With an included angle of 45°, it is used to process the third-layer large-diameter inner hole.

A connecting bolt 7 and a connecting washer 8 are provided between the second-layer cutter body 10 and the first-layer cutter body 1 .

It is used for machining the stepped inner hole of the front casing of the transmission case. For the machining of the stepped inner hole, the included angles of the blade connecting lines between the first-layer cutter body 1, the second-layer cutter body 10 and the third-layer cutter body 11 are respectively: 45° and -45°, and are evenly distributed on the symmetrical sides of the tool; the boring tool slide 2 connected to the symmetrical sides of the tool body has a sliding groove, which can be axially slid through two slide bolts 4 for Axial spacing size adjustment, there are sliding keys on the boring tool holder 3 to match the sliding grooves of the boring tool slider 2, and the axial machining dimensional accuracy is adjusted through the diameter adjustment bolt (6); the third layer of the tool body 11 is symmetrical on both sides There is a sliding groove, which can adjust the radial size in cooperation with the sliding key on the boring tool holder 3. The third layer cutter body 11 is a thin disc cutter body.

Compared with the prior art, the beneficial effects of the present utility model are: the utility model can simultaneously process three stepped inner holes with different diameters by using a tool, and at the same time, each layer of the tool body adopts a sleeve-type hollow tool body, which is light in weight and has a high structure. It is simple, and each layer of the cutter body adopts the same size of the boring tool slider and the boring tool holder. The modules are unified and standard, with modularization and adjustability, and the processing depth of each hole can also be adjusted. The purpose of machining three large-diameter inner holes with one tool, the machining inner holes have high coaxiality and good consistency.

Description of drawings

Fig. 1 is the isometric view of the boring tool described in the implementation of the present utility model;

Fig. 2 is the front view of the boring tool described in the implementation of the present utility model;

Figure 3 is an isometric view of the cutter body described in the implementation of the present invention;

Figure 4 is an isometric view of the cutter body described in the implementation of the present invention;

FIG. 5 is an isometric view of the boring tool slider described in the implementation of the present utility model;

Figure 6 is an isometric view of the boring tool holder described in the practice of the present invention.

In the figure, 1. One-layer cutter body 2. Boring cutter slide fast 3. Boring cutter holder 4. Slider bolt 5. Tool holder bolt 6. Diameter adjustment bolt 7. Connecting bolt 8. Connecting washer 9. Tool handle bolt 10 . The second layer of the cutter body 11. The third layer of the cutter body 12. The cutter body bolt.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments, which are to explain rather than limit the present utility model.

As shown in Figure 1 and Figure 2, the utility model provides a large-diameter boring tool for processing three-layer stepped inner holes, which consists of a first layer of tool body 1, a boring tool slide 2, a boring tool holder 3, Slider bolts 4, tool seat bolts 5, diameter adjustment bolts 6, connecting bolts 7, connecting washers 8, tool shank bolts 9, the second layer of tool body 10, the third layer of tool body 11 and tool body bolts 12 are formed. The parts are assembled together.

The first-layer cutter body 1 is used to process the first-layer large-diameter inner hole. Two boring cutter slides 2 are connected on symmetrical sides of the cutter body. The boring cutter slides 2 can slide axially through two slider bolts 4 . , used to adjust the axial distance, the boring tool holder 3 is connected with the boring tool slide 2 through the tool holder bolt 5, and there are two sliding keyways on the boring tool slide 2 and the boring tool holder 3 in a radial sliding fit relationship , the axial machining dimensional accuracy can be adjusted through the diameter adjustment bolt 6 . The second layer cutter body 10 connects two boring tool slides 2 and the boring tool holder 3 on both sides in the same manner as above, and at the same time forms an angle of -45° with the first layer cutter body 1, for machining the second layer of large Diameter bore. The third-layer cutter body 11 is fixedly connected with the second-layer cutter body 10 through cutter body bolts 12 , and two boring tool holders 3 are connected on the symmetrical sides of the third-layer cutter body 11 , and at the same time, the first-layer cutter body 1 is 45 degrees away from each other. °Included angle for processing the third layer of large diameter inner holes.

The utility model is used for the large-diameter boring tool for processing three-layer stepped inner holes, and is used for the processing of the stepped inner holes of the front casing of the transmission case. The included angles of the blade connecting lines between the third layer cutter bodies 11 are 45° and -45° respectively, and they are evenly distributed on the symmetrical sides of the cutter, which reduces cutter body vibration and ensures the stability of the boring cutter. There are sliding grooves on the sliding speed 2 of the boring tool connected on the symmetrical sides of the cutter body. The two slider bolts 4 can be used for axial sliding to adjust the size of the axial distance. There are sliding keys and the boring tool on the boring tool holder 3. The sliding groove of the slider 2 is matched, and the axial machining dimensional accuracy is adjusted through the diameter adjustment bolt 6 . The third layer cutter body 11 is a disc cutter body with sliding grooves on both sides of the symmetry, which can adjust the radial size in cooperation with the sliding keys on the boring cutter holder 3, and the third layer cutter body 11 is a thin disc cutter body. , also offset most of the radial force center of the tool in the rotating state, reduce the deformation of the tool body, and ensure the stability of the entire tool structure.

As shown in Figure 1, this embodiment uses two layers of sleeve-type tool bodies and one layer of disc-type tool bodies to be connected, and the processing and use methods are as follows:

Step 1: Adjust the machining size of the boring tool holder 3 on both sides of the third layer cutter body 11 to the inner hole of the third layer through the diameter adjusting bolt 6, and then lock the tool holder bolt 5 to fix the size.

Step 2: Adjust the axial distance between the boring tool holder 3 on both sides of the second layer cutter body (10) and the boring tool holder 3 on the third layer cutter body 11 through the slider bolt 4, so as to ensure the inner diameter of the second layer. The depth dimension of the hole and the inner hole of the third layer, then adjust the boring tool holder 3 on both sides of the cutter body 10 of the second layer to the machining size of the inner hole diameter of the second layer through the diameter adjustment bolt 6, and then lock the tool holder bolt 5. Fixed size.

Step 3: Roughly adjust the axial distance between the second-layer cutter body 10 and the first-layer cutter body 1 , and then fix the dead connection bolt 7 and the connection washer 8 .

Step 4: Adjust the axial distance between the boring tool holder 3 on both sides of the first layer cutter body (1) and the boring tool holder 3 on the second layer cutter body 10 through the slider bolt 4, so as to ensure the inner diameter of the first layer. The depth dimension of the hole and the inner hole of the second layer, then adjust the boring tool holder 3 on both sides of the first layer cutter body 1 to the machining size of the inner hole of the first layer through the diameter adjusting bolt 6, and then lock the tool holder bolt 5 to adjust the size fixed.

The above are the preferred embodiments of the present invention. For those skilled in the art, without departing from the principles of the present invention, improvements and modifications made should also be within the protection scope of the present invention.

Claims (4)

1. The utility model provides a three-layer ladder major diameter boring cutter for processing derailleur case front shell which characterized in that: the boring cutter mainly comprises a first layer of cutter bodies (1), a boring cutter sliding block (2), a boring cutter holder (3), a sliding block bolt (4), a cutter holder bolt (5), a diameter adjusting bolt (6), a second layer of cutter bodies (10), a third layer of cutter bodies (11) and cutter body bolts (12);

the first layer of cutter bodies (1) are used for machining a first layer of large-diameter inner hole, two symmetrical sides of each cutter body are connected with two boring cutter sliding blocks (2), and each boring cutter sliding block (2) can axially slide through two sliding block bolts (4) and is used for adjusting the axial distance; the boring tool apron (3) is connected with the boring tool sliding block (2) through an apron bolt (5), two sliding key grooves are formed in the boring tool sliding block (2) and are in radial sliding fit with the boring tool apron (3), and axial machining size precision can be adjusted through a diameter adjusting bolt (6);

two sides of the second layer of cutter body (10) are also connected with two boring cutter sliding blocks (2) and a boring cutter holder (3) in the same way, and form an included angle of-45 degrees with the first layer of cutter body (1) at the same time, and the included angle is used for machining a second layer of large-diameter inner holes;

the third layer of cutter body (11) is fixedly connected with the second layer of cutter body (10) through a cutter body bolt (12), two boring cutter holders (3) are connected to two symmetrical sides of the third layer of cutter body (11), and an included angle of 45 degrees is formed between the third layer of cutter body and the first layer of cutter body (1) and used for machining a large-diameter inner hole of the third layer.

2. The three-layer stepped large-diameter boring tool for machining the front shell of the transmission case as claimed in claim 1, wherein: the cutter is characterized by further comprising a connecting bolt (7) and a connecting washer (8) which are arranged between the second layer of cutter body (10) and the first layer of cutter body (1).

3. The three-layer stepped large-diameter boring tool for machining the front shell of the transmission case as claimed in claim 1, wherein: the angle between the connecting lines of the cutting edges between the first layer of cutter body (1) and the second layer of cutter body (10) and the third layer of cutter body (11) is 45 degrees and-45 degrees respectively, and the angles are uniformly distributed on two symmetrical sides of the cutter; sliding grooves are formed in the boring cutter sliding blocks (2) connected to two symmetrical sides of the cutter body, the boring cutter sliding blocks can axially slide through two sliding block bolts (4) and are used for adjusting the size of the axial distance, sliding keys are arranged on the boring cutter holder (3) and matched with the sliding grooves of the boring cutter sliding blocks (2), and the axial machining size precision is adjusted through diameter adjusting bolts (6); the third layer of cutter body (11) is symmetrically provided with sliding grooves at two sides, and the sliding grooves are matched with sliding keys on the boring cutter holder (3) to adjust the radial size.

4. The three-layer stepped large-diameter boring tool for machining a front shell of a transmission case as claimed in claim 3, wherein: the third layer of cutter body (11) is a thin disc type cutter body.

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