CN206263382U - A kind of clamping device for processing thin-wall gear - Google Patents

Abstract

The utility model discloses a kind of clamping device for processing thin-wall gear,Including cramping body,The connecting shaft being connected with machine tool three-jaw chuck is provided with cramping body,Part location hole is provided with cramping body,Positioning screw is provided with locating platform on cramping body,Location nut is provided with Positioning screw,Kidney slot pressing plate is provided with Positioning screw and above location nut,Screwing bolts are provided with kidney slot pressing plate,The screwing bolts are closed with the corresponding threaded holes of setting on cramping body,Thin-wall workpiece radial direction is not acted on by chucking power,End face positioning positions clamping by the way of point contact,Chucking power is small,Deformation after interior hole machined is small,So as to ensure that the dimensional accuracy and form accuracy of the endoporus of thin-wall gear,Secondly the utility model can be used for the thin-wall part processing of grinding machine and lathe,The utility model has simple structure,Small volume,Lightweight and debugging is simple to be easy to the advantages of operating.

Description

A clamping device for processing thin-walled gears

technical field

The utility model patent relates to a clamping device for processing thin-walled gears, which belongs to the technical field of parts processing.

Background technique

For the manufacture of hard-toothed disc gears for engines, domestic gear factories use the most finishing process method, which is to modify the reference hole and end face after carburizing and quenching, and then use the reference hole and end face to locate and grind the gears to ensure the final accuracy of the gear. For this type of gear, the machining accuracy of the reference hole is directly related to the final accuracy of the gear. At present, the commonly used methods of clamping the workpiece when correcting the reference hole are: 1. Use a three-jaw chuck to directly clamp the outer circle of the gear to correct the inner hole of the workpiece 2. Use the method of positioning the tooth surface and clamping the pitch circle of the gear with the pitch circle clamp to correct the benchmark of the inner hole. These two conventional ways of clamping the workpiece can produce small deformation of the inner hole of the common workpiece, which can meet the technical requirements of the final drawing. Compared with thin-walled workpieces, thin-walled workpieces have the following processing characteristics: (1) The workpiece wall is thin, and the workpiece is deformed under the action of clamping force, which affects the dimensional accuracy and shape accuracy of the workpiece. 2) The wall of the workpiece is thin, and the cutting heat will cause thermal deformation of the workpiece, making it difficult to control the precision of the workpiece. (3) Under the action of cutting force, it is easy to generate vibration and deformation, which affects the dimensional accuracy, surface roughness, shape accuracy and position accuracy of the workpiece. When the hole is large, the wall is thin, and the size and shape error accuracy of the inner hole of the workpiece is high, it is difficult to guarantee the machining accuracy of the workpiece using conventional methods, so the existing methods for processing thin-walled gears are still not perfect.

Utility model content

The purpose of this utility model is to provide a clamping device for processing thin-walled gears with simple structure, small volume, light weight and simple debugging, which can ensure the dimensional accuracy and shape accuracy of the inner hole of the thin-walled gear during processing , to overcome the deficiencies of the prior art.

The utility model is realized in the following way: a clamping device for processing thin-walled gears, comprising a clamping body, a connecting shaft connected with the three-jaw chuck of the machine tool is arranged on the clamping body, and a Part positioning holes, positioning screws are arranged on the positioning platform on the clamping body, positioning nuts are provided on the positioning screws, waist-shaped groove pressing plates are arranged on the positioning screws and above the positioning nuts, and waist-shaped groove pressing plates are arranged on the positioning screws. A tightening bolt is provided, and the said tightening bolt matches the threaded hole provided on the clamping body.

Contacts are arranged on the pressing plate of the waist-shaped groove.

Slots for inserting fastening bolts are arranged on the waist-shaped groove pressing plate.

Three positioning screws are arranged on the clamping body.

Due to the adoption of the above technical scheme, the radial direction of the thin-walled workpiece is not affected by the clamping force, and the end face positioning adopts point contact positioning and clamping, the clamping force is small, and the deformation of the inner hole after processing is small, thus ensuring the thin-walled workpiece The dimensional accuracy and shape accuracy of the inner hole of the gear. Secondly, the utility model can be used for processing thin-walled parts of grinding machines and lathes. The utility model has the advantages of simple structure, small volume, light weight, simple debugging and convenient operation.

Description of drawings

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

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the structural representation of waist-shaped groove pressing plate;

Description of reference signs: 1-clamping body, 2-connecting shaft, 3-part positioning hole, 4-positioning platform, 5-locating screw, 6-locating nut, 7-waist groove pressing plate, 8-tightening bolt, 9-threaded hole, 10-contact, 11-slot, 12-thin-walled gear.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but not as a limitation of the utility model.

Embodiment of the present utility model: a clamping device for processing thin-walled gears, including a clamping body 1, on which a connecting shaft 2 connected with a three-jaw chuck of a machine tool is arranged, and on the clamping body 1 Part positioning holes 3 are arranged on the upper part, positioning screws 5 are provided on the positioning platform 4 on the clamping body 1, positioning nuts 6 are provided on the positioning screws 5, and positioning screws 5 are provided on the positioning screws 5 and above the positioning nuts 6. The waist-shaped groove pressing plate 7 is provided with tightening bolts 8 on the waist-shaped groove pressing plate 7 , and the tightening bolts 8 cooperate with the threaded holes 9 provided on the clamping body 1 .

Contacts 10 are arranged on the waist-shaped groove pressing plate 7 .

Slots 11 for inserting fastening bolts 8 are provided on the waist-shaped groove pressing plate 7 .

Three positioning screws 5 are arranged on the clamping body 1 .

When the utility model is used, the clamping body 1 is clamped and fixed on the main shaft of the machine tool with a three-jaw chuck. When the clamping device is used for the first time, the part positioning hole 3 and the positioning platform 4 of the clamping body 1 are processed to ensure the reference Just light the end surface, so that the positioning hole 3 of the clamping body 1 and the positioning platform 4 are vertical, put the thin-walled gear 12 to be processed into the clamping body 1, pay attention to the flatness of the end surface, and screw the positioning nut 6 on the positioning screw 5, on the positioning screw 5 and above the positioning nut 6, a waist-shaped groove pressing plate 7 is arranged. After adjusting the height distance and locking the positioning screw 5, tighten the bolt 8 through the slot 11 of the waist-shaped groove pressing plate 7 Screw into the three threaded holes 9 in the clamping body 1, adjust the contact position between the waist-shaped groove pressure plate 7 and the product, correct the outer circle and end face runout of the thin-walled gear 12, and then lock and tighten the bolt 8 clockwise. The inner hole processing of the thin-walled gear 12 was performed.

When in use, since the radial direction of the thin-walled gear is not affected by the clamping force at this time, the end face positioning adopts point contact positioning and clamping, the clamping force is small, and the deformation of the inner hole is small, thus ensuring the thin-walled gear The dimensional accuracy and shape accuracy of the inner hole of the gear.

Claims (4)

1. A clamping device for processing thin-walled gears, comprising a clamping body (1), characterized in that: the clamping body (1) is provided with a connecting shaft (2) connected to a three-jaw chuck of a machine tool, A part positioning hole (3) is provided on the clamping body (1), a positioning screw (5) is provided on the positioning platform (4) on the clamping body (1), and a positioning screw (5) is provided on the positioning screw (5) Nut (6), on the positioning screw (5) and above the positioning nut (6) is provided with a waist-shaped groove pressing plate (7), and on the waist-shaped groove pressing plate (7) is provided with a tightening bolt (8), so The aforementioned tightening bolts (8) match the threaded holes (9) provided on the clamping body (1). 2. The clamping device for processing thin-walled gears according to claim 1, characterized in that: the waist-shaped groove pressing plate (7) is provided with contacts (10). 3 . The clamping device for machining thin-walled gears according to claim 1 , characterized in that: slots ( 11 ) for inserting tightening bolts ( 8 ) are provided on the waist-shaped groove pressing plate ( 7 ). 4. The clamping device for processing thin-walled gears according to claim 1, characterized in that three positioning screws (5) are arranged on the clamping body (1).