CN104690578A - Hydraulic clamp used for end face hole of horizontal type center drill bent axle - Google Patents

Abstract

The invention discloses a hydraulic fixture used for drilling crankshaft end faces of a horizontal machining center, which is installed on the workbench of the horizontal machining center. The fixture includes a clamping mechanism and a connecting rod positioning mechanism. The clamping mechanism uses a V-shaped support block to support the main journal of the crankshaft, and the position can be adjusted according to the size of the crankshaft; Rod clamping positioning function. The entire fixture has a reasonable structure and is easy to assemble, and is suitable for the processing of various crankshafts, which can reduce the labor intensity of the staff and greatly improve the processing efficiency.

Description

Hydraulic Fixture for Drilling Crankshaft End Face in Horizontal Machining Center

technical field

The invention relates to a fixture, in particular to a hydraulic fixture used for drilling crankshaft end face holes in a horizontal machining center.

Background technique

With the wide application of CNC machine tools, especially the emergence of CNC machining centers has brought great convenience to the processing of hole system parts. As we all know, both ends of the crankshaft are designed with threaded holes and positioning pin holes, which are collectively referred to as end face holes, and are used to install flywheels and other components to output power. The distribution size and quantity of the end face holes are not the same. At present, most of the jigs used for drilling the crankshaft end face on the machining center are directly borrowed from the jigs used in the previous radial drilling machines, and have not been redesigned. Because the positioning of the jigs was all manually adjusted before, the machining process is labor-intensive and the production efficiency is low. The versatility is poor, and different types of crankshafts need to be equipped with different sets of fixtures.

Contents of the invention

In order to solve the above problems, the present invention provides a hydraulic clamp for crankshaft end face holes with reasonable structure, convenient assembly, wide applicability and high drilling efficiency.

A hydraulic fixture used for drilling crankshaft end face holes in a horizontal machining center, the fixture includes: a clamping mechanism and a connecting rod positioning mechanism. The device is installed on the workbench of the horizontal machining center.

The clamping mechanism includes a base, a V-shaped support block, a pressing plate, a fastening nut, and a stud. One of the V-shaped support blocks is fixed on the front section of the base, and the other is located at the rear end of the base and can be adjusted according to the length of the processed crankshaft. The position is used to support the main journal of the crankshaft. The stud is installed on the V-shaped support block through threaded connection, and the pressure plate is installed on it, and the main journal is clamped by the fastening nut.

The connecting rod positioning mechanism includes a positioning block, a slide plate, an electromagnetic reversing valve, an overflow valve, a hydraulic pump, and an oil return tank. One of the positioning blocks is fixedly installed on the slide plate, and the other can move laterally on the changing plate through hydraulic drive. , the slide plate is installed on the base and can be adjusted according to the position of the diameter of the connecting rod. The electromagnetic reversing valve, overflow valve, hydraulic pump, and oil return tank form a hydraulic circuit to provide power for the movable positioning plate.

The hydraulic fixture used for drilling crankshaft end faces of horizontal machining centers provided by the present invention has the beneficial effects of reasonable structure, convenient assembly, suitable for processing various types of crankshafts, reducing labor intensity of workers, and greatly improving processing efficiency .

Description of drawings

Figure 1 is a schematic diagram of the crankshaft components.

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

Fig. 3 is a schematic diagram of the connecting rod positioning mechanism of the present invention.

Labeled in the figure:

1. Crankshaft end; 2. Crankshaft main journal; 3. Crankshaft connecting rod diameter; 4. Base; 5A, 5B. V-shaped support block; 6. Pressure plate; 7. Fastening nut; 8. Stud; 9A, 9B. Positioning block; 10. Sliding plate; 11. Electromagnetic reversing valve; 12. Relief valve; 13. Hydraulic pump; 14. Return oil tank.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, Fig. 2 and Fig. 3, a hydraulic fixture used for drilling the crankshaft end face of a horizontal machining center is installed on the workbench of the horizontal machining center. The fixture includes: a clamping mechanism and a connecting rod positioning mechanism.

The clamping mechanism includes a base 4, a V-shaped support block 5A, a V-shaped support block 5B, a pressing plate 6, a fastening nut 7, and a stud 8. The V-shaped support block 5A is fixed on the front section of the base, and the V-shaped support block 5B is located at the rear end of the base and can be adjusted according to the length of the processed crankshaft. It is used to support the main journals 2A and 2B of the crankshaft respectively. The studs 8 are respectively installed on the V-shaped support blocks 5A and 5B through threaded connections. A pressing plate 6 is installed, and the main journals 2A, 2B are clamped by fastening nuts 7 .

The connecting rod positioning mechanism includes a positioning block 9A, a positioning block 9B, a slide plate 10, an electromagnetic reversing valve 11, an overflow valve 12, a hydraulic pump 13, and an oil return tank 14. The positioning block 9A is fixedly installed on the slide plate 10, and the positioning The block 9B can move laterally on the slide plate 10 through hydraulic drive. The slide plate 10 is installed on the base 4 and can be adjusted according to the position of the connecting rod diameter. The electromagnetic reversing valve 11, overflow valve 12, hydraulic pump 13, The oil return tank 14 constitutes a hydraulic circuit to provide power for the movable positioning plate 9B.

The use process of the present invention is: take the crankshaft shown in Figure 1 as an example, the crankshaft has 3 main journals, 2 connecting rod diameters, both ends need to be processed, and when processing the big end, first place the crankshaft main journal 2A in the V shape On the support block 5A, adjust the V-shaped support block 5B to support the main journal 2B. After placing the crankshaft, adjust the position of the slide plate 10 so that the positioning block 9A is in contact with the crankshaft connecting rod diameter 3. At this time, turn on the switch of the electromagnetic reversing valve 11 And make it work in the upper position, the positioning block 9B is close to 9A under the thrust of the hydraulic pump 13 to realize the clamping and positioning of the connecting rod diameter 3, when the rated pressure is reached, the hydraulic pump unloads through the overflow valve 12, and at the same time the electromagnetic reversing valve 11 Work in the middle position to maintain a stable clamping force, and finally rely on the pressure plate 6, fastening nut 7, and stud 8 to compress the main journal of the crankshaft to prevent the crankshaft from moving under force during processing. When one end is processed, the CNC workbench rotates 180 degrees, and the other end is processed. After all processing is completed, the front and rear pressure plates are first loosened, and then the electromagnetic reversing valve 11 works in the lower position, so that the positioning block 9B releases the connecting rod journal 3, Finally remove the parts.

In terms of function, this fixture mainly solves the clamping and positioning of crankshaft main journal and connecting rod diameter, so as to facilitate the processing of positioning pin holes and threaded holes. The fixture uses the principle of hydraulic pressure to complete the required functions well. The entire fixture structure Reasonable and easy to assemble, it is suitable for the processing of various crankshafts, which can reduce the labor intensity of the staff and greatly improve the processing efficiency.

Claims (3)

1. A hydraulic clamp for drilling the crankshaft end face of a horizontal machining center, installed on the workbench of the horizontal machining center, characterized in that the clamp includes a clamping mechanism and a connecting rod positioning mechanism, and the clamping mechanism includes Base (4), V-shaped support block (5A), V-shaped support block (5B), pressure plate (6), fastening nut (7), stud (8), the V-shaped support block (5A) is fixed In the front section of the base, the V-shaped support block (5B) is located at the rear end of the base and can be adjusted according to the length of the processed crankshaft, and is used to respectively support the main journals (2A, 2B) of the crankshaft, and the studs (8) are connected by threads They are respectively installed on the V-shaped support blocks (5A, 5B), on which the pressure plate (6) is installed, and the main journal (2A, 2B) is clamped by the fastening nut (7); the connecting rod positioning mechanism includes positioning block (9A), positioning block (9B), slide plate (10), electromagnetic reversing valve (11), overflow valve (12), hydraulic pump (13), oil return tank (14), the positioning block (9A) Fixedly installed on the slide plate (10), the positioning block (9B) can move laterally on the slide plate (10) through hydraulic drive, and the slide plate (10) is installed on the base (4) and can be adjusted according to the position of the connecting rod diameter , the electromagnetic reversing valve (11), overflow valve (12), hydraulic pump (13), and oil return tank (14) form a hydraulic circuit to provide power for the movable positioning plate (9B). 2. A hydraulic clamp for drilling the crankshaft end face of a horizontal machining center according to claim 1, characterized in that: the clamping mechanism uses a V-shaped support block to support the main journal of the crankshaft, and the V-shaped support block (5A ) is fixed at the front section of the base, and the V-shaped support block (5B) is located at the rear end of the base and can be adjusted according to the length of the processed crankshaft. 3. A hydraulic fixture for drilling the crankshaft end face hole of a horizontal machining center according to claim 1, characterized in that: the connecting rod positioning mechanism adopts an electromagnetic reversing valve (11), an overflow valve (12) , hydraulic pump (13), and oil return tank (14) form a hydraulic circuit to complete the clamping and positioning of the connecting rod diameter.