Clamping tool for machining outer surface of product protection cover

Abstract

The utility model provides a clamping tool used for machining the outer surface of a product protection cover, and aims to solve the technical problems that when an existing mandrel is used for clamping and machining, due to the fact that the diameters of cambered surfaces of the inner surface of the protection cover are different, the positions of the protection cover clamped every time are different, the positioning accuracy of parts is not high, and the consistency of machined parts is poor. Comprising a mandrel, a screw, a supporting piece, a pressing piece, a nut, a spring and a pin. The spring is directly installed in a spring hole of the supporting piece, the left end of the supporting piece abuts against the end face of the left baffle, the middle of the right end of the supporting piece is hollow, and the concave diameter of a hollow opening is larger than that of the right baffle of the mandrel; as the position relation between the positioning surface and the part is fixed, the part can move left and right for fine adjustment, the consistency of the machining state of the part is ensured, and the machining quality of the part is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of machining of thin-walled arc-shaped rotary body parts, and relates to a clamping tool for turning the outer surface of a product protective cover. BACKGROUND

[0002] The protective cover is a thin-walled arc-shaped cylindrical part and is an important component of a product, which can effectively protect the surface of the product and prevent foreign matters from entering and damaging the product. As shown in the structure Figure 1 The existing protective cover is machined by a numerical control lathe when the outer arc is machined, and the arc surface is not easy to be clamped when clamped by a three-jaw chuck, and the thin wall is easy to be deformed, so a special tool is needed for clamping.

[0003] The existing tool is shown in Figure 2 The structure is an integrated mandrel, the arc surface support is machined on the shaft, the arc surface diameter is the same as that of the protective cover, the left side of the mandrel is clamped by the three-jaw chuck, then the protective cover is sleeved on the support, and the nut is tightened at the back to fix, the mandrel is rotated by the three-jaw chuck to be machined, and the position of the protective cover is different every time due to the difference of the arc surface diameter of the inner surface of the protective cover when the mandrel is clamped and machined, the positioning accuracy of the part is not high, and the consistency of the machined parts is poor. SUMMARY

[0004] The utility model needs to solve the technical problem of clamping of thin-walled arc-shaped rotary body parts, designs the tool according to the structural characteristics of the parts, and improves the machining quality of the parts.

[0005] The technical scheme of the utility model is:

[0006] A kind of clamping tool for processing product protective cover outer surface, it is characterized by including mandrel, screw, support, compression piece, nut, spring, pin;Mandrel is stepped shaft, the diameter of middle part is larger, two baffles are welded at its left and right ends respectively, different diameter of left baffle is distributed with counterbore and blind hole respectively;Right baffle is cylindrical thin plate, its diameter is larger than the diameter of part right end hole, mandrel right end is processed with screw thread;Support is rotary body with arc-shaped generatrix, center hole passes through mandrel, is located between the two baffles of mandrel, the diameter of arc-shaped rotary body is equal to the nominal value of part inner surface arc diameter, thread hole is distributed on left end face diameter, pin hole is distributed on adjacent 90 degree diameter, spring hole is evenly distributed on adjacent 45 degree diameter;Screw is screwed into support thread hole through the counterbore of left baffle of mandrel, pin is installed in the pin hole of left baffle and support, which limits the rotation of support, spring is installed in the spring hole of support, left end of support abuts on left baffle end face, the diameter of right end of support is larger than the diameter of right baffle of mandrel;Compression piece is cylindrical thin plate, middle hole passes through mandrel, surrounding has weight-reducing hole, cylindrical diameter is larger than the diameter of part right end hole, compression piece abuts on part right end face, nut passes through the rear end of mandrel, and the two are matched.

[0007] Further, two diameters of left baffle are respectively distributed with two counterbores and two blind holes.

[0008] Further, two thread holes are distributed on the diameter of left end face of support, two pin holes are distributed on adjacent 90 degree diameter, and spring holes are evenly distributed on adjacent 45 degree diameter.

[0009] Further, four spring holes are evenly distributed on the diameter adjacent to thread hole on the diameter of left end face of support.

[0010] Further, three weight-reducing holes are distributed around compression piece.

[0011] Further, left end of mandrel is clamped on three-jaw chuck of machine tool.

[0012] Further, when spring is in relaxed state, there is gap between left end of support and left baffle of mandrel.

[0013] Further, when spring is in compressed state, there is gap between concave surface of support and right baffle of mandrel.

[0014] Further, part is protective cover, which is located on the periphery of support.

[0015] Further, after part, i.e. protective cover, is sleeved on support, nut and mandrel are tightened.

[0016] Technical effects of the utility model:

[0017] The new type of clamp is used for clamping the product protection cover, and the product protection cover is clamped on the support piece through the core shaft, the screw, the support piece, the pressing piece, the nut and the spring. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Existing protective cover

[0019] Figure 2 Integrated mandrel structure of existing tooling

[0020] Figure 3 Two-dimensional front view of the utility model

[0021] Figure 4 Two-dimensional front view of the mandrel

[0022] Figure 5 Three-dimensional view of the mandrel

[0023] Figure 6 Three-dimensional view of the support piece

[0024] Figure 7 Three-dimensional view of the pressing piece

[0025] Wherein: 1 mandrel 2 screw 3 support piece 4 pressing piece 5 nut 6 spring 7 pin DETAILED DESCRIPTION

[0026] As Figure 2 shown, the utility model relates to a clamping tool for machining the outer surface of a product protection cover, and the main constituent parts are a mandrel 1, a screw 2, a support piece 3, a pressing piece 4, a nut 5, a spring 6 and a pin 7.

[0027] The mandrel 1 structure is as shown in Figure 4 , Figure 5 The shaft structure is a stepped shaft, the middle part is larger in diameter, two baffle plates are welded at the left and right ends respectively, the left baffle plate is distributed with two counterbores and two blind holes at 180 degrees, the right baffle plate is a cylindrical thin plate, the diameter is larger than the diameter of the right end hole of the part, and the rear end of the shaft is provided with a thread.

[0028] The support piece 3 structure is as shown in Figure 6The arc-shaped cylinder is shown, the center hole is installed between the two baffles through the mandrel, the diameter of the arc is the same as the nominal value of the inner surface arc diameter of the part, the left end surface is distributed with two threaded holes at 180 degrees, two pin holes at 90 degrees, four spring holes are evenly distributed at 45 degrees, the screw 2 is screwed into the support through the countersunk hole of the left baffle, the pin 7 is installed in the pin hole of the left baffle and the support, which limits the rotation of the support, the spring is installed in the spring hole of the support, the left end is abutted against the left baffle end surface, the right end of the support is hollowed out for weight reduction, and the right baffle of the mandrel is recessed.

[0029] The pressing part 4 is a cylindrical sheet with a hole through the mandrel and three weight reduction holes around it, and the cylindrical diameter is larger than the right end hole diameter of the part, which is tightly abutted against the right end surface of the part. The nut 5 is tightened through the rear end of the mandrel to press the pressing part.

[0030] The method of using the above clamp is as follows:

[0031] First, clamp the assembled clamp mandrel left end on the three-jaw chuck of the machine tool, at this time the spring is in a relaxed state, the concave surface of the support body is in contact with the right baffle of the mandrel, and the protective cover is sleeved on the support body from the rear end of the mandrel before starting machining, then the pressing part is installed in the rear end of the part, and finally the nut is tightened. Since the left baffle on the mandrel has a spring inside and there is a gap between the left end of the support and the left baffle, when the nut is tightened, the pressing part can press the part and the support to move left until the inner surface of the protective cover is tightly abutted against the right side of the right baffle, ensuring the consistency of the part during machining.

Claims

1. A clamping fixture for processing the outer surface of a product protective cover, characterized in that, Includes a spindle (1), screw (2), support (3), clamping part (4), nut (5), spring (6), and pin (7); The mandrel (1) is a stepped shaft with a larger diameter in the middle part. Two baffles are welded to its left and right ends respectively. Countersunk holes and blind holes are distributed on different diameters of the left baffle. The right baffle is a cylindrical thin plate with a diameter larger than the diameter of the hole at the right end of the part. The right end of the mandrel is threaded. The support (3) is a rotating body with an arc-shaped generatrix. The central hole passes through the spindle and is located between the two baffles of the spindle. The diameter of the arc-shaped rotating body is the same as the nominal value of the arc diameter of the inner surface of the part. Threaded holes are distributed on the diameter of the left end face, pin holes are distributed on the diameter of adjacent 90 degrees, and spring holes are evenly distributed on the diameter of adjacent 45 degrees. The screw (2) passes through the countersunk hole of the left baffle of the mandrel and is screwed into the threaded hole of the support. The pin (7) is installed in the pin hole of the left baffle and the support to restrict the rotation of the support. The spring is installed in the spring hole of the support. The left end of the support rests on the end face of the left baffle. The middle of the right end of the support is hollow. The inner diameter of the hollow opening is larger than that of the right baffle of the mandrel. The clamping part (4) is a cylindrical thin sheet with a central hole through the mandrel and weight-reducing holes around it. The diameter of the cylinder is larger than the diameter of the hole at the right end of the part. The clamping part is close to the right end face of the part, and the nut (5) passes through the rear end of the mandrel. The two are fitted together.

2. The clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, The left baffle has two countersunk holes and two blind holes distributed on its two diameters, respectively.

3. The clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, The support member (3) has two threaded holes distributed on the diameter of the left end face, two pin holes distributed on the diameter of adjacent 90 degrees, and spring holes evenly distributed on the diameter of adjacent 45 degrees.

4. A clamping fixture for processing the outer surface of a product protective cover according to claim 3, characterized in that, The support member (3) has four spring holes evenly distributed at a 45-degree angle to the threaded hole on the left end face.

5. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, There are three weight-reducing holes around the clamping part (4).

6. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, The left end of the spindle is clamped in the three-jaw chuck of the machine tool.

7. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, When the spring is in the relaxed state, there is a gap between the left end of the support and the left baffle of the spindle.

8. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, When the spring is in a compressed state, there is a gap between the concave surface of the support and the right baffle of the spindle.

9. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, The component, or protective cover, is located on the outer periphery of the support.

10. A clamping fixture for processing the outer surface of a product protective cover according to claim 1, characterized in that, After the parts, i.e. the protective cover, are fitted onto the support, they are tightened with nuts and mandrels.

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