Thin-walled cylinder part turning and milling combined machining clamp with zero point positioning function

Abstract

The invention discloses a thin-walled cylinder part turn-milling combined machining clamp with a zero-point positioning function, which comprises a clamp body used for mounting a cylinder part, an upper connecting disc arranged at the upper end of the clamp body, and a lower connecting disc arranged at the lower end of the clamp body; the zero-point positioning blind rivets are arranged on the upper connecting disc and the lower connecting disc and used for being connected with a machine tool spindle; and the plug pins are arranged on the upper connecting disc and the lower connecting disc and used for transmitting the torque of the main shaft. An end face positioning block is arranged on the clamp body, and a locking mechanism is arranged at the upper end of the end face positioning block. A plurality of auxiliary supporting mechanisms are arranged on the clamp body. The end face positioning block is matched with the locking mechanism capable of adjusting the locking force, and reliable axial clamping of the workpiece is achieved. The auxiliary supporting mechanism achieves radial supporting. The zero-point positioning blind rivet is arranged, the zero-point positioning blind rivet and a machine tool spindle can be rapidly and accurately connected and positioned, the installation and adjustment time of the clamp is shortened, the production efficiency is improved, and the consistency of multiple clamping and the machining precision are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of fixtures, specifically to a milling and turning fixture for thin-walled cylindrical parts with zero-point positioning function. Background Technology

[0002] Thin-walled cylindrical parts are typically manufactured from aluminum alloy tubing through machining. The process begins with rough machining on a CNC lathe and CNC milling machine, followed by stress removal, and finally, finishing of the internal and external shapes. The finishing process utilizes a horizontal five-axis turning and milling machining center, equipped with a horizontal turning spindle and a oscillating milling spindle. The internal turning and milling of the part are completed in two stages from both ends. To ensure coaxiality at both ends, a specialized fixture is designed to guarantee machining accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function, so as to solve the problems of inconvenient clamping and adjustment of existing thin-walled cylindrical parts.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a milling and turning fixture for thin-walled cylindrical parts with zero-point positioning function, comprising: A clamping body is used to install cylindrical parts. The clamping body has an upper connecting plate at its upper end and a lower connecting plate at its lower end. Zero-point positioning pull studs are installed on the upper and lower connecting plates and are used to connect to the machine tool spindle; Connecting pins, located on the upper and lower connecting plates, are used to transmit spindle torque.

[0005] As a further improvement to the above technical solution: The clamping body is provided with an end face positioning block, and a locking mechanism is provided at the upper end of the end face positioning block.

[0006] The locking mechanism includes a locking body, a locking pin slidably disposed on the locking body, and a locking block installed at one end of the locking pin. A locking spring is provided between the locking pin and the locking body. An adjusting screw is provided on the locking body and threadedly engaged with it. The adjusting screw is located above the locking pin.

[0007] The clamping device is provided with several auxiliary support mechanisms.

[0008] The auxiliary support mechanism includes a connecting body and a support column. The connecting body is mounted on the clamping body and is provided with a threaded sleeve. The threaded sleeve and the connecting body are threadedly engaged. The support column is slidably disposed within the threaded sleeve, and a support spring is provided between the threaded sleeve and the support column.

[0009] The bottom of the clamp body is provided with a floating support mechanism, which includes a floating ring and a fixed ring. The floating ring is slidably installed on the clamp body, and a return spring is provided between the fixed ring and the floating ring.

[0010] The bottom diameter of the floating ring is smaller than the diameter of the workpiece, and the upper part of the floating ring is provided with an inlet cone surface.

[0011] The zero-point positioning rivets are at least three. According to the three-point plane principle, three zero-point positioning rivets can be used to quickly complete the positioning. The main shaft is equipped with a three-hole turntable. The assembly is completed by inserting the zero-point positioning rivets into the holes.

[0012] The end of the support column is provided with a soft padding layer. The soft padding layer can prevent the support column from crushing the workpiece.

[0013] Compared with the prior art, the beneficial effects of the present invention are: By setting a zero-point positioning rivet, a quick and precise connection and positioning with the machine tool spindle can be achieved, shortening the installation and adjustment time of the fixture, improving production efficiency, and ensuring consistency and machining accuracy in multiple clamping operations.

[0014] The floating support mechanism at the bottom gives the workpiece a certain degree of self-adaptation during positioning and clamping, which can compensate for minor errors in the workpiece or fixture, effectively avoiding over-positioning problems caused by rigid support, and ensuring stable positioning and machining accuracy of the workpiece.

[0015] The locking mechanism with adjustable locking force, using end face positioning blocks, achieves reliable axial clamping of the workpiece; multiple auxiliary support mechanisms provide uniform support to the thin-walled cylindrical parts radially, enhancing the rigidity of the workpiece during processing and effectively suppressing vibration and deformation.

[0016] The auxiliary support mechanism has a soft padding layer at the end of the support column, which can effectively prevent scratches or crushes on the workpiece surface while providing radial support. It is especially suitable for thin-walled cylindrical parts with high surface quality requirements, ensuring the final quality of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the clamping body structure of the present invention; Figure 3 This is a schematic diagram of the present invention without the clamping body; Figure 4 This is a schematic diagram of the structure after the workpiece is removed in this invention; Figure 5 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 6 For the present invention Figure 5 Schematic diagram of the flipped cross-sectional structure at point AA; Figure 7 This is a schematic diagram showing the positional distribution of the locking mechanism and auxiliary support mechanism of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the cross-sectional structure at point BB; Figure 9 For the present invention Figure 7 Schematic diagram of the cross-sectional structure at the CC section.

[0018] Reference numerals: 1. Clamp body; 11. End face positioning block; 12. Locking mechanism; 121. Locking body; 122. Locking pin; 123. Locking block; 124. Locking spring; 125. Adjusting screw; 13. Auxiliary support mechanism; 131. Connecting body; 132. Support column; 133. Threaded sleeve; 134. Support spring; 14. Floating support mechanism; 141. Floating ring; 142. Fixed ring; 143. Return spring; 2. Upper connecting plate; 3. Lower connecting plate; 4. Zero-point positioning pull pin; 5. Connecting pin; 100. Workpiece. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1 and Figure 9 As shown, the milling and turning fixture for thin-walled cylindrical parts with zero-point positioning function in this embodiment includes: The clamping body 1 is used to install cylindrical parts. The upper end of the clamping body 1 is provided with an upper connecting plate 2, and the lower end is provided with a lower connecting plate 3. Zero-point positioning pull studs 4 are set on the upper connecting plate 2 and the lower connecting plate 3 and are used to connect to the machine tool spindle; there are at least 3 zero-point positioning pull studs 4.

[0024] Connecting pin 5, located on the upper connecting plate 2 and the lower connecting plate 3, is used to transmit spindle torque. The connection method between the zero-point positioning pull pin 4 and the connecting pin 5 and the spindle is a conventional connection structure in this field and is not described in detail here.

[0025] The fixture body 1 is provided with an end face positioning block 11, and a locking mechanism 12 is provided on the upper end of the end face positioning block 11. The end face positioning block 11 is installed on the fixture body 1 by bolts, and the locking mechanism 12 is installed on the fixture body 1 by bolts. The two are used to clamp and position the workpiece 100.

[0026] The locking mechanism 12 includes a locking body 121, a locking pin 122 slidably disposed on the locking body 121, and a locking block 123 installed at one end of the locking pin 122. A locking spring 124 is disposed between the locking pin 122 and the locking body 121. An adjusting screw 125 with a threaded engagement is disposed on the locking body 121, and the adjusting screw 125 is disposed above the locking pin 122. In use, by rotating the adjusting screw 125, the locking pin 122 drives the locking block 123 downward, thereby clamping the workpiece 100. The locking mechanism 12 and the end face positioning block 11 are used for axial clamping. The locking block 123 is rotatably mounted on the locking body 121 and can rotate under the action of external force to ensure that the workpiece 100 can enter smoothly and to press the workpiece 100.

[0027] The clamping body 1 is provided with several auxiliary support mechanisms 13. The auxiliary support mechanisms 13 are used for radial clamping.

[0028] The auxiliary support mechanism 13 includes a connecting body 131 and a support column 132. The connecting body 131 is bolted to the clamping body 1. A threaded sleeve 133 is provided on the connecting body 131, and the threaded sleeve 133 and the connecting body 131 are threadedly engaged. The support column 132 is slidably disposed within the threaded sleeve 133. A support spring 134 is provided between the threaded sleeve 133 and the support column 132. A soft covering layer is provided at the end of the support column 132. The soft covering layer is used to prevent the support column 132 from damaging the surface of the workpiece 100.

[0029] A floating support mechanism 14 is provided at the bottom of the fixture body 1. The floating support mechanism 14 includes a floating ring 141 and a fixed ring 142. The floating ring 141 is slidably mounted on the fixture body 1. A return spring 143 is provided between the fixed ring 142 and the floating ring 141. The bottom diameter of the floating ring 141 is smaller than the diameter of the workpiece, and an inlet cone surface is provided on the upper part of the floating ring 141.

[0030] In use, insert workpiece 100 from top to bottom (at this time, locking block 123 should be rotated to avoid workpiece 100). Insert floating ring 141 downwards along the guide cone surface. Since the diameter of floating ring 141 is smaller than the diameter of workpiece 100, workpiece 100 will not fall. The step of workpiece 100 contacts end face positioning block 11. By rotating adjusting screw 125, locking pin 122 drives locking block 123 downwards (locking block 123 should be rotated so that it can contact the step of workpiece 100), thus clamping the axis of workpiece 100. Then, the auxiliary support mechanism 13 clamps workpiece 100 radially. Specifically, rotating threaded sleeve 133 causes threaded sleeve 133 to extend out of connecting body 131, causing support column 132 to extend accordingly. Here, the spring tension is adjusted to adjust the clamping force. Due to the floating of floating support mechanism 14, over-positioning will not occur during positioning and clamping. After installation, workpiece 100 can be processed.

[0031] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics of the solutions is not described in detail here. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A milling and turning fixture for thin-walled cylindrical parts with zero-point positioning function, characterized in that, include: The clamping body (1) is used to install cylindrical parts. The upper end of the clamping body (1) is provided with an upper connecting plate (2) and the lower end is provided with a lower connecting plate (3). Zero-point positioning pull stud (4) is set on the upper connecting plate (2) and the lower connecting plate (3) for connecting to the machine tool spindle; Connecting pin (5) is set on the upper connecting plate (2) and the lower connecting plate (3) to transmit spindle torque.

2. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 1, characterized in that, The clamping body (1) is provided with an end face positioning block (11), and the upper end of the end face positioning block (11) is provided with a locking mechanism (12).

3. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 2, characterized in that, The locking mechanism (12) includes a locking body (121), a locking pin (122) slidably disposed on the locking body (121), and a locking block (123) installed on one end of the locking pin (122). A locking spring (124) is provided between the locking pin (122) and the locking body (121). An adjusting screw (125) with a threaded engagement is provided on the locking body (121). The adjusting screw (125) is located above the locking pin (122).

4. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 1 or 2, characterized in that, The clamping body (1) is provided with several auxiliary support mechanisms (13).

5. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 4, characterized in that, The auxiliary support mechanism (13) includes a connecting body (131) and a support column (132). The connecting body (131) is mounted on the clamping body (1). A threaded sleeve (133) is provided on the connecting body (131). The threaded sleeve (133) and the connecting body (131) are threadedly engaged. The support column (132) is slidably disposed in the threaded sleeve (133). A support spring (134) is provided between the threaded sleeve (133) and the support column (132).

6. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 4, characterized in that, The bottom of the clamp body (1) is provided with a floating support mechanism (14), which includes a floating ring (141) and a fixed ring (142). The floating ring (141) is slidably installed on the clamp body (1), and a return spring (143) is provided between the fixed ring (142) and the floating ring (141).

7. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 6, characterized in that, The bottom diameter of the floating ring (141) is smaller than the diameter of the workpiece, and the upper part of the floating ring (141) is provided with an inlet cone surface.

8. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 1, characterized in that, The number of zero-point positioning rivets (4) is at least 3.

9. The milling and turning compound machining fixture for thin-walled cylindrical parts with zero-point positioning function according to claim 5, characterized in that, The end of the support column (132) is provided with a soft covering layer.

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