A mandrel for machining long tubular workpieces

Abstract

The utility model discloses a mandrel for long tube workpiece processing, including mandrel stem and mandrel body, mandrel body and mandrel stem detachable connection, the workpiece of waiting for processing is set in the outside of mandrel body, the utility model has the advantages of can effectively shorten the moving stroke of lathe when dismounting workpiece, and has expanded the range of applicable equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of mandrels for machining long tubes, and in particular to a mandrel for machining long tube workpieces. Background Technology

[0002] For long tubular workpieces, a mandrel is required for positioning and clamping during machining. Typical mandrel structures are mounted on machine tools, but the retraction stroke of the lathe tailstock or milling machine center seat is too large (it needs to exceed the length of the workpiece) when loading and unloading the workpiece. Many machines cannot meet the machining requirements due to insufficient mandrel construction. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a mandrel for machining long tube-shaped workpieces that can effectively shorten the travel distance of the machine tool when disassembling and assembling workpieces.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is a mandrel for machining long tube-shaped workpieces, including a mandrel rod and a mandrel body; the mandrel body and the mandrel rod are detachably connected; the workpiece to be processed is sleeved on the outside of the mandrel body.

[0005] Furthermore, one end of the mandrel is provided with a tapered surface; one end of the mandrel is provided with a tapered hole that mates with the tapered surface.

[0006] Furthermore, a drive pin is installed at one end of the mandrel body; a slot is provided at one end of the mandrel rod for the drive pin to pass through.

[0007] Furthermore, the spindle body has a through hole; the transmission pin passes through the through hole, and the two are interference-fitted.

[0008] Furthermore, the mandrel body includes a shaft body, and a first connecting head is provided at one end of the shaft body near the mandrel rod; the diameter of the first connecting head is larger than that of the shaft body; a second connecting head is provided at the other end of the shaft body; the diameter of the second connecting head is smaller than that of the shaft body; and a nut is threaded onto the second connecting head.

[0009] Furthermore, a washer is also installed on the second connecting shaft head.

[0010] Furthermore, the washer is an open washer.

[0011] Furthermore, a flange is connected to the mandrel.

[0012] The beneficial effects of this utility model are: Compared to the traditional one-piece mandrel, this application improves the mandrel by designing it as a two-section split structure that can be quickly disassembled. While ensuring reliable clamping and positioning, it can effectively shorten the travel of the tool when disassembling and assembling workpieces, expand the range of applicable equipment, and improve work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the embodiment; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 1 A sectional view of the central axis. Figure 4 for Figure 1 A three-dimensional view of the central shaft; Figure 5 This is a cross-sectional view of the workpiece after it has been installed, as shown in the example.

[0014] In the diagram, 1-mandrel, 101-flange, 102-conical surface, 103-slot, 2-mandrel body, 201-conical hole, 202-second connecting shaft head, 203-shaft body, 204-first connecting shaft head, 205-through hole, 3-washer, 4-nut, 5-drive pin. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] Example A mandrel for machining long tubular workpieces, such as Figure 1-4 As shown, it includes a mandrel 1 and a mandrel body 2; the mandrel body 2 and the mandrel 1 are detachably connected; the workpiece to be processed is sleeved on the outside of the mandrel body 2.

[0017] The mandrel for machining long tubular workpieces is designed as a two-section, quick-disassembly split structure. While ensuring reliable clamping and positioning, it can effectively shorten the travel of the machine tool when assembling and disassembling workpieces, expand the range of applicable equipment, and improve work efficiency.

[0018] Specifically, one end of the mandrel 1 is provided with a conical surface 102; one end of the mandrel 1 is provided with a conical hole 201 that mates with the conical surface 102. By matesing the conical surface 102 with the conical hole 201, good center positioning can be achieved.

[0019] Specifically, a drive pin 5 is installed at one end of the spindle body 2; a slot 103 is provided at one end of the spindle rod 1 for the drive pin 5 to pass through. Through the slot 103 and the drive pin 5, the spindle rod 1 can drive the spindle body 2 to rotate when it rotates.

[0020] Specifically, the spindle body 2 has a through hole 205; the transmission pin 5 passes through the through hole 205, and the two are interference-fitted.

[0021] Specifically, the mandrel body 2 includes a shaft body 203, with a first connecting head 204 at one end of the shaft body 203 near the mandrel rod 1; the diameter of the first connecting head 204 is larger than that of the shaft body 203; a second connecting head 202 is provided at the other end of the shaft body 203; the diameter of the second connecting head 202 is smaller than that of the shaft body 203; a nut 4 is threaded onto the second connecting head 202. When installing a workpiece, one end of the workpiece rests on the shoulder of the second connecting head 202.

[0022] Specifically, a washer 3 is also installed on the second connecting shaft head 202. The other end of the workpiece rests against the washer 3. Figure 5 This is a sectional view after the workpiece has been installed.

[0023] Specifically, washer 3 is an open washer.

[0024] Specifically, a flange 101 is connected to the mandrel 1. When installing the mandrel 1, the three-piece chuck contacts one end face of the flange 101.

[0025] The working principle of this utility model: Clamp the mandrel 1 using a three-piece chuck. Insert the workpiece from the right end of the mandrel body 2 until one end abuts against the shoulder of the second connecting shaft head 202. Install the washer 3 and nut 4, and tighten nut 4 until washer 3 moves to abut against the right end of the workpiece. Then, control the movement of the machine tool tailstock with the center tailstock until it abuts against the tapered hole at the right end of the mandrel body 2. This completes the installation of the workpiece and mandrel. After machining, simply control the machine tool tailstock with the center tailstock to retract slightly more than [a certain distance]. Figure 2 The central shaft 1 is inserted into the mandrel body 2 to the desired depth, allowing the workpiece to be removed from the mandrel 1 along with the mandrel body 2. Then, the nut 4 is unscrewed to replace the workpiece. This invention designs the mandrel as a two-section, quickly detachable, split structure. While ensuring reliable clamping and positioning, it effectively shortens the travel distance of the workpiece during assembly and disassembly, expands the range of applicable equipment, and improves work efficiency.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A mandrel for machining long tubular workpieces, characterized in that: It includes a mandrel (1) and a mandrel body (2); the mandrel body (2) and the mandrel (1) are detachably connected; the workpiece to be processed is sleeved on the outside of the mandrel body (2); one end of the mandrel (1) is provided with a conical surface (102); one end of the mandrel (1) is provided with a conical hole (201) that mates with the conical surface (102); one end of the mandrel body (2) is equipped with a transmission pin (5); one end of the mandrel (1) is provided with a slot (103) for the transmission pin (5) to pass through.

2. The mandrel for machining long tubular workpieces according to claim 1, characterized in that: The spindle body (2) has a through hole (205); the transmission pin (5) passes through the through hole (205) and the two are interference fit.

3. The mandrel for machining long tubular workpieces according to claim 1 or 2, characterized in that: The spindle body (2) includes a shaft (203), and a first connecting head (204) is provided at one end of the shaft (203) near the spindle rod (1); the diameter of the first connecting head (204) is larger than that of the shaft (203); a second connecting head (202) is provided at the other end of the shaft (203); the diameter of the second connecting head (202) is smaller than that of the shaft (203); a nut (4) is threaded onto the second connecting head (202).

4. The mandrel for machining long tubular workpieces according to claim 3, characterized in that: A washer (3) is also installed on the second connecting shaft head (202).

5. The mandrel for machining long tubular workpieces according to claim 4, characterized in that: The washer (3) is an open washer.

6. The mandrel for machining long tubular workpieces according to claim 1, characterized in that: A flange (101) is connected to the spindle (1).

Images