CN209477454U - A kind of gear ring gear-hobbing clamp - Google Patents

Abstract

The utility model discloses a kind of gear ring gear-hobbing clamps, including briquetting (1), locking nut (3), upper press cover (4), pressing sleeve (5), taper body (8), pull rod (9), banding spring (10), centering sliding block (11), take-up housing (12), hollow positioning disk (13), hollow pedestal (14), the utility model can guarantee that workpiece is accurately felt relieved and positioned, worker only needs clamping workpiece, remaining is automatic processing, machining accuracy and efficiency are improved, labor intensity of workers is reduced.

Description

A ring gear hobbing jig

technical field

The utility model relates to an automatic gear hobbing hydraulic clamp used for processing a plurality of large-tolerance ring gears, which belongs to the field of gear hobbing clamps.

Background technique

The ring gear part is a part widely used in various mechanical structures. It is matched with related parts to form a whole and work in harmony with each other. Therefore, the manufacturing and processing accuracy of the ring gear directly affects the operating performance and life of the machine.

Ring gear parts are mostly steel parts with large aperture, thin wall and thin tooth width, which are easy to deform during the manufacturing process, especially the inner hole size is unstable, and the tolerance changes greatly. One solution of traditional gear hobbing for external ring gear parts is to make a dead centering mandrel, manually load and unload the workpiece, center it by the mandrel, and manually tighten the upper gland. However, due to the large variation in the dimensional tolerance of the inner hole of the ring gear, the centering cannot be correct during gear hobbing, and the precision of the processed ring gear parts cannot be guaranteed. Another solution is to press down the rear column of the machine tool to apply pressure to the centering slider of the workpiece. However, the rear column parts of the gear hobbing machine are generally designed with a small clamping pressure, generally about 1t, so the pressure applied to the inner hole of the workpiece is transmitted through the force. The radial force does not exceed 4t, and sometimes the ring gear with a large aperture tolerance of ±0.15mm cannot be fully tightened. The large aperture tolerance ring gear refers to a ring gear with a tolerance of about ±0.15mm, and the precision of the processed ring gear parts cannot be guaranteed.

Utility model content

Purpose of the utility model: In order to overcome the deficiencies in the prior art, the utility model provides an automatic hobbing hydraulic jig for simultaneously processing multiple large-tolerance ring gears to ensure the machining accuracy of the gear rings.

Technical scheme: in order to achieve the above object, the technical scheme adopted in the utility model is:

A ring gear hobbing fixture, including a pressure block, a lock nut, an upper gland, a pressure sleeve, a taper body, a pull rod, a clamp spring, a centering slider, a slider seat, a hollow positioning plate, and a hollow base, in,

The positioning plate is fixed on the base, the slider seat is fixed on the positioning plate, the centering slider is arranged on the slider seat, and the centering slider is slidably connected with the slider seat; the taper The body is located between the centering slider and the positioning plate, and the taper body and the centering slider are wedge-shaped slidingly connected, and the clamping spring is arranged on the outside of the centering slider;

The pull rod is set in the hollow part of the positioning plate, the bottom end extends out of the base to connect with the oil cylinder, and the top end extends out of the positioning plate to be fixedly connected with the pressure block; the upper gland is fixed on the top of the pull rod through a compression sleeve, and the taper body is connected with the pressure block. Compression sleeve fixed connection.

Further: the pressure sleeve is provided with a limiting cavity, the centering slider is provided with a fixing ring, and the fixing ring is located in the limiting cavity.

Further: an open gasket is arranged between the pressing block and the upper pressing cover.

Further: a gasket is provided between the pull rod and the positioning plate, and the gasket is located between the pull rod and the compression sleeve.

Further: the pull rod is provided with a limiting groove, and the limiting nail passes through the positioning plate and extends into the limiting groove.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model can ensure the accurate centering and positioning of the workpiece, the workers only need to clamp the workpiece, and the rest are automatically processed, which improves the processing accuracy and efficiency and reduces the labor intensity of the workers.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the utility model, should be understood that these examples are only used for illustrating the utility model and are not intended to limit the scope of the utility model, after having read the utility model, those skilled in the art have a clear understanding of the utility model Modifications of various equivalent forms of the novelty all fall within the scope defined by the appended claims of the present application.

A large-tolerance ring gear hobbing fixture, as shown in Figure 1, is mainly composed of a centering part, a positioning part, a pressing part, an upper gland fine-tuning part, and an automatic loosening part of a tensioning slider.

The centering part includes: mainly composed of a centering slider 11, a taper body 8, and a slider seat 12. In order to accurately center the ring gear with large tolerance, the centering slider needs to have a sufficiently large tension and a large radial force. Therefore, the workbench oil cylinder is used to pull down the taper body 8 to apply a uniform downward force of about 4.42t. After passing through the 30° conical surface, and the contact length of the conical surface exceeds 2/3 of the total width of the part, apply pressure to the 11 centering slider for about 4.42t. 10t radial force. The centering slider 11 is evenly tightened to both sides along the chute. In order to apply radial force uniformly to the circumference of the inner hole of the workpiece, the number of sliders is set at 16 until the inner hole of the workpiece with a large tolerance is tightened to ensure accurate positioning of the workpiece. Heart.

The positioning part is mainly composed of a slider seat 12, a positioning disc 13 and a base 14. It is used to position the workpiece to ensure that the size of the hobbing station of the fixture remains unchanged.

The pressing part is mainly composed of a pressing block 1, an open gasket 2, an upper gland 4 and a pull rod 9. The lower movement of the workbench oil cylinder drives the pull rod 9 to move downward, and the pressure block 1 connected to it exerts a downward force on the split gasket 2, and through the transmission of force, the upper plane of the ring gear 4 is finally pressed by the upper gland. Because the tensile force of the workbench can reach several tons, it can ensure that the positioning surface of the workpiece is pressed.

Multiple gear rings are processed, and the dimensional tolerance in the width direction of the workpiece changes greatly. The upper gland 4 needs to be made to float. Therefore, the upper and lower positions of the upper gland 4 can be adjusted by connecting the thread of the pressing block 1 and the tie rod 9, so as to realize compaction on the ring gear. plane, to ensure that the ring gear is pressed tightly.

After the gear hobbing is completed, take the workpiece for convenience. The upward movement of the workbench oil cylinder drives the pull rod 9 to move upward, and then drives the taper body 8 connected to the pressure sleeve 5 to move upward. Now the taper surface is disengaged, and the tightening spring 10 shrinks to drive the centering slide block 11 to move inwardly along the slide block seat 12 rectangular grooves, so as to disengage the inner hole of the workpiece.

In order to be able to move the centering slider 11 inward when the tapered surface is disengaged, four sets of annular grooves are formed on the cylindrical surface of the centering slider 11, and four sets of cylindrical springs are used to tighten the centering slider to overcome the centering slider. 11 and the friction force of slide block seat 12 rectangular grooves, make centering slide block move inward, and then unclamp workpiece.

In order to better ensure the cutting accuracy, the fixture needs to be firmly fixed on the worktable, so 6-M16x85 T-shaped bolts are used to connect the base 14 with the workbench to ensure the connection strength.

The pressure sleeve 5 is provided with a limiting cavity, and the centering slider 11 is provided with a fixing ring 7, and the fixing ring 7 is located in the limiting cavity. An open gasket 2 is arranged between the pressing block 1 and the upper pressing cover 4 . A gasket 6 is provided between the pull rod 9 and the positioning disc 13 , and the gasket 6 is located between the pull rod 9 and the pressing sleeve 5 . A limiting groove is arranged on the pull rod 9, and the limiting nail passes through the positioning plate 13 and extends into the limiting groove.

The working principle of the utility model is as follows:

After checking the installation accuracy of the fixture tooling, put the workpieces in order according to the figure to ensure that the positioning surface of the slider seat 12 is firmly attached to the end surface of the lowermost workpiece. The workbench oil cylinder drives the pull rod 9 to move down, drives the lock nut 3 connected to it to exert downward force on the pressure sleeve 5, and then drives the taper body 8 to move down, and the taper body 8 moves down to evenly slide toward the centering through the taper surface. The block 11 exerts radial force, and the centering slide block 11 is evenly tightened to both sides along the rectangular chute until the inner hole of the workpiece is pre-tensioned. Now install briquetting block 1, split washer 2, upper gland 4, and manually tighten the threads of briquetting block 1 and pull rod 9 to ensure that the upper gland 4 can compress the upper surface of the workpiece. Then the workbench cylinder drives the pull rod 9 and other parts to move up, manually rotate the thread of the pressure block 1 and the tie rod 9 for about 1/4 turn, and the workbench cylinder tightens down again, at this time, the positioning surface can be pressed and accurate centering can be ensured workpiece bore. After the hobbing is completed, the oil cylinder of the workbench moves up to drive the pull rod 9 and other parts to move up, and the pressure sleeve 5 drives the taper body 8 to move up. 12 The rectangular groove moves inwards to loosen the inner hole of the workpiece. Take off split gasket 2 and upper gland 4, take out workpiece at this moment again, put into new workpiece, continue hobbing process.

The centering and positioning of the workpiece depend on the tension exerted by the workbench, because the tension of the workbench can reach several tons, so the accurate centering and positioning of the workpiece can be completely guaranteed. Different from the traditional structure, the precision can be guaranteed. Adopting the above structure solves the problem of gear hobbing of large-tolerance ring gear very well. Workers only need to clamp the workpiece, and the rest are automatically processed, which improves the processing accuracy and efficiency and reduces the labor intensity of workers.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (7)

1. a kind of gear ring gear-hobbing clamp, it is characterised in that: including briquetting (1), locking nut (3), upper press cover (4), pressing sleeve (5), It is taper body (8), pull rod (9), banding spring (10), centering sliding block (11), take-up housing (12), hollow positioning disk (13), hollow Pedestal (14), wherein

The positioning disk (13) is fixed on pedestal (14), and the take-up housing (12) is fixed on positioning disk (13), the centering Sliding block (11) is arranged on take-up housing (12), and the centering sliding block (11) is slidably connected with take-up housing (12)；The taper body (8) it is located between centering sliding block (11) and positioning disk (13), and wedge shape is slided between the taper body (8) and centering sliding block (11) Connection, the banding spring (10) are set to the outside of centering sliding block (11)；

The pull rod (9) is set to positioning disk (13) hollow part, and bottom end is stretched out pedestal (14) and connect with oil cylinder, and top is stretched out Positioning disk (13) is fixedly connected with briquetting (1)；The upper press cover is fixed on the top of pull rod (9), the taper by pressing sleeve (5) Body (8) is fixedly connected with pressing sleeve (5).

2. gear ring gear-hobbing clamp according to claim 1, it is characterised in that: it is provided with limit chamber on the pressing sleeve (5), it is described It is provided with fixed ring (7) in centering sliding block (11), the fixed ring (7) is located in limit chamber.

3. gear ring gear-hobbing clamp according to claim 2, it is characterised in that: be arranged between the briquetting (1) and upper press cover (4) There are open washer (2).

4. gear ring gear-hobbing clamp according to claim 3, it is characterised in that: set between the pull rod (9) and positioning disk (13) It is equipped with gasket (6), and the gasket (6) is located between pull rod (9) and pressing sleeve (5).

5. gear ring gear-hobbing clamp according to claim 4, it is characterised in that: be provided with limiting slot on the pull rod (9), limit Nail is extend into limiting slot across positioning disk (13).

6. gear ring gear-hobbing clamp according to claim 5, it is characterised in that: pedestal (14) is fixedly mounted on work by bolt Make on platform.

7. gear ring gear-hobbing clamp according to claim 5, it is characterised in that: the number of centering sliding block (11) is 16.