CN105834771A - Hydraulic clamp compatible for machining of steering knuckles of multiple varieties - Google Patents

Abstract

This invention relates to a hydraulic fixture compatible with machining multiple types of steering knuckles, comprising a positioning plate, a hydraulic cylinder, and a side positioning and clamping cylinder. The positioning plate is fixed to the C-axis turntable of a machine tool by a first connecting screw, and the positioning plate has a hydraulic oil passage inside. The hydraulic cylinder and the side positioning and clamping cylinder are fixed to the positioning plate by a second connecting screw, with the hydraulic cylinder located at the center of the positioning plate and the side positioning and clamping cylinder located at the outer edge of the positioning plate. A hydraulic push rod is placed at the center of the hydraulic cylinder, and a main positioning block is fixed to the center of the hydraulic cylinder by a third connecting screw. A clamping rod is connected to the hydraulic push rod by a threaded connection, and the clamping block is located on the clamping rod. The beneficial effects of this invention are: the replacement of the main positioning block, clamping rod, and side positioning and clamping cylinder only occupies 20% to 30% of the storage space required to replace the entire positioning plate (and above) fixture; and it can reduce product changeover time.

Description

A hydraulic fixture compatible with multi-variety steering knuckle processing

technical field

The invention belongs to the technical field of processing fixtures, in particular to a hydraulic fixture compatible with multi-variety steering knuckle processing.

Background technique

Automobile steering knuckle is one of the main parts of automobiles, and the processing of automobile steering knuckle is mainly completed by processing equipment such as milling machines and lathes. During the processing of the steering knuckle, fast and stable clamping is required, and at the same time, the steering knuckle of an automobile requires high machining accuracy. The current processing and clamping process can basically meet certain processing requirements, but with the rapid development of automobile manufacturing, automobile steering knuckles tend to be manufactured in small batches. If a special clamping tool is manufactured for each product for processing, it will inevitably cause a waste of resources for the tooling and fixtures and occupy storage space.

The existing fixtures used to process steering knuckles of automobiles have the following defects: 1. Each type of steering knuckle needs to be prepared with a special processing fixture; 2. The idle processing fixtures occupy a relatively large storage space; 3. It is troublesome to switch products. The entire set of fixtures needs to be switched, the product switching cycle is long, and the processing point needs to be searched again for each switch.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of the prior art, and provide a hydraulic clamp compatible with multi-variety steering knuckle processing with short switching period and short debugging time.

The object of the present invention is accomplished through the following technical solutions, including a positioning plate, a hydraulic cylinder, and a side positioning and clamping cylinder. The positioning plate is fixed on the C-axis turntable of the machine tool through the first connecting screw. The oil circuit; the hydraulic cylinder and the side positioning clamping cylinder are fixed on the positioning plate through the second connecting screw, the hydraulic cylinder is located at the center of the positioning plate, and the side positioning clamping cylinder is located at the outer edge of the positioning plate; the hydraulic push rod is placed on the hydraulic At the center of the oil cylinder, the main positioning block is fixed on the center of the hydraulic oil cylinder through a third connecting screw, the clamping rod is connected with the hydraulic push rod through a threaded connection, and the clamping block is located on the clamping rod.

As a preference, the d1 mating surface on the main positioning block and the d2 mating surface on the hydraulic cylinder are in a clearance fit, and the distance between the gaps is 0.01MM.

Preferably, the radial size of the D1 matching surface on the main positioning block is smaller than the radial size of the D2 matching surface on the steering knuckle.

The beneficial effects of the present invention are as follows: 1. The replaced main positioning block, clamping rod, and side positioning clamping oil cylinder only account for 20% to 30% of the storage space for replacing the entire positioning disc (including) the above fixture; 2. It is troublesome to manufacture the oil circuit of the positioning plate, and it is compatible with one more model, which can reduce the manufacturing cost and time of the fixture by half; 3. It can reduce the switching time of the product.

Description of drawings

Fig. 1 is a schematic structural diagram of a hydraulic clamp of the present invention.

Fig. 2 is a schematic diagram of the steering knuckle installation structure of the present invention.

Fig. 3 is a schematic diagram of the clearance fit structure between the main positioning block and the hydraulic cylinder of the present invention.

Fig. 4 is a schematic diagram of the threaded cooperation structure of the hydraulic push rod and the clamping rod of the present invention.

The labels in the drawings are: 1. C-axis turntable of the machine tool; 2. First connecting screw; 3. Positioning plate; 4. Second connecting screw; 5. Hydraulic cylinder; 6. Main positioning block; 7. Hydraulic push rod ; 8. Clamping block; 9. Clamping rod; 10. Side positioning clamping oil cylinder; 11. The third connecting screw; 12. Steering knuckle.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings: As shown in accompanying drawings 1 to 4, the present invention includes a positioning disc 3, a hydraulic cylinder 5, and a side positioning clamping cylinder 10, and the positioning disc 3 is connected by a first connecting screw. 2. It is fixed on the C-axis turntable 1 of the machine tool. There is a hydraulic oil circuit inside the positioning plate 3; the hydraulic cylinder 5 and the side positioning clamping cylinder 10 are fixed on the positioning plate 3 through the second connecting screw 4, and the hydraulic cylinder 5 is located on the positioning plate. 3, the side positioning clamping cylinder 10 is located on the outer edge of the positioning plate 3; the hydraulic push rod 7 is placed in the center of the hydraulic cylinder 5, and the main positioning block 6 is fixed on the center of the hydraulic cylinder 5 through the third connecting screw 11. The clamping rod 9 is connected with the hydraulic push rod 7 through threaded connection, the clamping block 8 is located on the clamping rod 9, and the clamping block 8 is used for clamping the steering knuckle 12 for processing.

The mating surface d1 on the main positioning block 6 and the mating surface d2 on the hydraulic cylinder 5 form a gap fit, and the distance between the gaps is 0.01MM.

The radial dimension of the D1 mating surface on the main positioning block 6 is smaller than the radial dimension of the D2 mating surface on the steering knuckle 12 .

The structure of the present invention is compatible with the switching of multi-variety steering knuckle machining, and can remake and replace the main positioning block 6, clamping rod 9, and side positioning and clamping cylinder 10 according to the D2 and H dimensions of different types of steering knuckles, and some steering knuckles can be switched It only involves the replacement of two or a single part; when switching product processing, only a few small parts are involved because the replacement of the positioning plate 3 is not involved, and the clearance fit between the main positioning block 6 and the hydraulic cylinder body 5 is generally only 0.01. Clearance, for the tolerance of ±0.10 in steering knuckle machining, the clearance can be ignored, so there is no need to re-find the machined dots (X-axis, Y-axis direction), just adjust the Z-axis according to the H size of different models of steering knuckles.

The present invention is not limited to the above-mentioned embodiment, no matter any changes are made in its shape or material composition, any structural design provided by the present invention is a deformation of the present invention, and all should be considered within the protection scope of the present invention .

Claims (3)

1. a hydraulically operated fixture for compatible multi items knuckle processing, including location dish (3), hydraulic jack (5), location, side Clamping cylinder (10), it is characterised in that: described location dish (3) is fixed on lathe C axle by the first attachment screw (2) and turns On dish (1), the internal oil circuit having logical hydraulic pressure of location dish (3)；Hydraulic jack (5), side locating clip locking oil cylinder (10) are passed through Second attachment screw (4) is fixed on location dish (3), and hydraulic jack (5) is positioned at the center of location dish (3), and side positions Clamping cylinder (10) is positioned at the exterior rim of location dish (3)；Hydraulic push rod (7) is placed in the center of hydraulic jack (5), main fixed Position block (6) is fixed in hydraulic jack (5) in the heart by the 3rd attachment screw (11), and clamping bar (9) is by screw thread even The mode that connects is connected with hydraulic push rod (7), and clamping block (8) is positioned on clamping bar (9).

The hydraulically operated fixture of compatible multi items knuckle the most according to claim 1 processing, it is characterised in that: described master D1 on locating piece (6) coordinates face to coordinate in matched in clearance between face with the d2 on hydraulic jack (5), the spacer in its gap From for 0.01MM.

The hydraulically operated fixture of compatible multi items knuckle the most according to claim 1 processing, it is characterised in that: described master D1 on locating piece (6) coordinates the radial dimension in face to coordinate the radial dimension in face less than the D2 on knuckle (12).