CN105904257A - Cylinder outer expansion clamping fixture - Google Patents

Abstract

The invention relates to a clamping fixture for external expansion of a cylinder, which includes a clamp bottom plate, a support vertical plate, a clamp plate, an inner hexagonal screw, a positioning block, a pressure plate, an outer cone expansion sleeve, an inner expansion sleeve, an inclined block, a cylinder pull rod, and a fixed base , cylinder, guide rod; since the inner cone surface is provided inside the outer cone expansion sleeve, and the outer cone surface is provided outside the inner expansion sleeve, the inner cone surface of the outer cone expansion sleeve and the outer cone surface of the inner expansion sleeve are taper matched, And through the horizontal reciprocating movement of the cylinder pull rod inclined block to promote the vertical reciprocating movement of the guide rod and the inner expansion sleeve, the accurate positioning of the workpiece is realized. The tooling fixture has beneficial effects: it adopts taper fit, the matching precision is high, and the coaxiality between the tooling and the workpiece is guaranteed; the tooling fixture only needs to select different inner expansion sleeves according to the outer diameter of the workpiece to be processed to meet various requirements. The processing of outer diameter workpieces has a wide range of applications and strong interchangeability.

Description

A clamping fixture for external expansion of a cylinder

technical field

The invention belongs to the field of tooling fixtures, and in particular relates to a clamping fixture for external expansion of a cylinder.

Background technique

In daily life, the fixture plays a vital role in the manufacturing process. Its purpose is to accurately fix the processed object, so as to ensure the processing accuracy of the processed parts more stably, reduce the processing time, and reduce the manufacturing cost of the enterprise. ,Increase productivity. In reality, machine tool fixtures generally use manual assistance to clamp workpieces, which has low production efficiency and high production costs. Therefore, a cylinder external expansion clamping fixture is proposed for this shortcoming, which can automatically expand and clamp workpieces, not only expand It expands the scope of use of the machine tool, realizes one machine with multiple functions, and is conducive to cost saving.

Contents of the invention

In view of the limitations of the above problems, the purpose of the present invention is to provide a clamping fixture for external expansion of the cylinder, which has a simple structure, low cost, and has a fast, convenient and efficient automatic tensioning device.

To achieve the above object, the present invention adopts the following technical solutions:

A clamping fixture for external expansion of a cylinder, including a clamp bottom plate, a support vertical plate, a clamp plate, a hexagon socket screw, a positioning block, a pressure plate, an outer cone expansion sleeve, an inner expansion sleeve, an inclined block, a cylinder pull rod, a fixed base, a cylinder, guide rod; the support vertical plate is fixed above the fixture bottom plate, the clamp plate is fixed on the support vertical plate, the clamp plate is fixed on the clamp plate to form a press plate combination mechanism, the positioning block is installed on the press plate, and the inner hexagon screw expands the outer cone The sleeve is fixed on the fixture plate, the inner conical surface of the outer conical expansion sleeve and the outer conical surface of the inner expansion sleeve are taper matched, the cylinder is fixed on the fixed support, the cylinder rod is connected to the inclined block, and the inclined block Contact and interact with the bottom surface of the guide rod.

The cylinder external expansion clamping fixture designed in the present invention only needs to select different internal expansion sleeves according to the outer diameter of the processed workpiece, which can better realize the processing of various external diameter workpieces, and the taper fits with high precision, ensuring The final processing quality of the product. The designed cylinder external expansion clamping fixture adopts the ingenious combination of external cone expansion sleeve, internal expansion sleeve, cylinder tie rod, cylinder, etc., which expands the scope of use of the machine tool, realizes one machine with multiple functions, and significantly improves the clamping efficiency of the workpiece.

Compared with prior art, remarkable advantage of the present invention:

In the clamping fixture provided by the invention, the clamping of the workpiece adopts taper fit, the taper fit has high precision, and the positioning is accurate and reliable, thereby ensuring the coaxiality between the tooling and the workpiece. As long as different inner expansion sleeves are selected according to the outer diameter of the workpiece to be processed, this fixture can meet the processing of various workpieces with different outer diameters. The taper fits with high precision, wide universal range, strong interchangeability, and long service life. The processing quality of the final product is guaranteed, the actual production efficiency is improved, and the manufacturing cost is reduced.

Description of drawings

Fig. 1 is a schematic structural view of the cylinder expansion clamping fixture of the present invention.

Fig. 2 is a schematic diagram of the partial structure of the cylinder expansion clamping fixture of the present invention.

detailed description

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

As shown in Figure 1 and Figure 2, a clamping fixture for external expansion of a cylinder includes a fixture bottom plate 1, support vertical plates 2, 13, fixture plate 3, hexagon socket head screws 4, positioning block 5, pressure plate 6, and outer cone expansion sleeve 7. Inner expansion sleeve 8, inclined block 9, cylinder pull rod 10, fixed base 11, cylinder 12, guide rod 14; fixed support vertical plates 2, 13 above the clamp bottom plate 1, and the clamp plate 3 is fixed on the support vertical On the plate 2, the clamp plate 3 is fixed with a press plate 6 to form a press plate combination mechanism, the positioning block 5 is installed on the press plate 6, and the inner hexagon screw 4 fixes the outer cone expansion sleeve 7 on the clamp plate 3, and the outer cone expansion sleeve The inner tapered surface of 7 is matched with the outer tapered surface of the inner expansion sleeve 8, the cylinder 12 is fixed on the fixed support 11, and the cylinder pull rod 10 is connected to the inclined block 9, and the inclined block 9 is connected to the bottom surface of the guide rod 14. contact, interaction. The taper fit between the inner tapered surface of the outer tapered expansion sleeve 7 and the outer tapered surface of the inner expanded sleeve 8 facilitates the accurate positioning of the outer circle of the workpiece (differential case) to be processed, and finally realizes an ideal processing state.

The use process of the above-mentioned cylinder external expansion clamping fixture is as follows:

1) Firstly, the clamp is specifically and accurately clamped on the workbench of the CNC machine tool, and the cooperation between the inner cone surface of the outer cone expansion sleeve 7 and the conical surface of the inner expansion sleeve 8, and the contact between the inclined block 9 and the guide rod 14 are checked. Condition.

2) Position the processed parts (differential case) on the outer circle and place them in the inner expansion sleeve 8 in the clamp body, and at the same time operate the cylinder to push the inclined block 9 forward to realize the guide rod 14 of the inclined block 9 and the inner expansion sleeve 8 Moving upwards vertically, the outer cone expansion sleeve 7 presses the inner expansion sleeve 8 to realize radial locking. So far, the workpiece can be processed smoothly after the pressing plate 6 compresses the workpiece.

Claims (1)

1. A clamping fixture for external expansion of a cylinder, characterized in that it includes a fixture bottom plate (1), support vertical plates (2, 13), fixture plate (3), hexagon socket head screws (4), positioning blocks (5), Pressing plate (6), outer cone expansion sleeve (7), inner expansion sleeve (8), inclined block (9), cylinder tie rod (10), fixed base (11), cylinder (12), guide rod (14); The support vertical plate (2, 13) is fixed above the clamp bottom plate (1), the clamp plate (3) is fixed on the support vertical plate (2), and the clamp plate (3) is fixed with a pressure plate (6) to form a pressure plate combination mechanism , the positioning block (5) is installed on the pressure plate (6), the inner hexagonal screw (4) fixes the outer cone expansion sleeve (7) on the fixture plate (3), and the inner cone expansion sleeve (7) The taper surface is matched with the outer taper surface of the inner expansion sleeve (8), the cylinder (12) is fixed on the fixed support (11), the cylinder rod (10) is connected to the inclined block (9), and the inclined block (9) Contact and interact with the bottom surface of the guide rod (14).