A positioning and clamping tool for tee-shaped workpieces

Abstract

The utility model discloses a three -way workpiece positioning clamping frock, it belongs to positioning frock field, including cylinder, the axial through square hole that is equipped with in the cylinder center, and one side of square hole is installed with the positioning board, is equipped with two positioning holes on the positioning board, and the size, interval of two positioning holes are identical with the outer diameter, interval of two pipe of three -way workpiece, square hole another three side walls are respectively screwed with two jackscrews, and two jackscrews on every side wall are along the axial direction distribution of cylinder, when three -way workpiece is fixed in the direction hole through positioning hole and jackscrew, three -way workpiece both ends round mouth all are located cylinder two end face outside, and the lathe can clamp the round mouth of three -way workpiece located outside, and processes the outer surface of cylinder. The above -mentioned structure finds frock through the blank, and the frock after processing can avoid the error influence that repeated mounting and clamping blank parts bring, solves the blank defect.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixtures, specifically to a positioning and clamping fixture for tee-type workpieces. Background Technology

[0002] This solution is for a type of tee product, whose processing requirements include ensuring the concentricity of the two round openings, as well as ensuring the positional accuracy with the other two pipes on the same side.

[0003] The traditional machining method involves clamping one end of the round opening with a machine tool chuck, machining the other end first, and then reversing the process to machine the clamped end. However, due to casting defects in the blank itself, the height of the outer surface of the blank and the axis of the two ends of the round opening are inconsistent. In addition, the product requires repeated clamping during machining, which further leads to serious deviations in the machined values ​​and an extremely high scrap rate.

[0004] In view of the problems existing in the prior art, this utility model designs and manufactures a positioning and clamping fixture for tee-type workpieces to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a positioning and clamping fixture for three-way workpieces, which can process products in the same batch through a single clamping, thus solving the problem caused by the blank.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a positioning and clamping fixture for a three-way workpiece includes a cylinder, the cylinder having an axially penetrating square hole at its center, a positioning plate installed on one side of the square hole, and two positioning holes on the positioning plate. The size and spacing of the two positioning holes are consistent with the outer diameter and spacing of the two through pipes of the three-way workpiece, allowing the three-way workpiece to extend into the square hole with the positioning plate. Two tightening bolts are screwed onto the other three side walls of the square hole, and the two tightening bolts on each side wall are distributed along the axial direction of the cylinder. When a tee-type workpiece is fixed in the directional hole through the positioning hole and the tightening bolt, the round openings at both ends of the tee-type workpiece are located on the outer side of the two end faces of the cylinder. The machine tool can clamp the round openings of the tee-type workpiece located on the outer side and process the outer surface of the cylinder.

[0007] Preferably, when the machine tool clamps the round opening of the tee-type workpiece located on the outer side to process the outer surface of the cylinder, the machine tool ejector pin can press against the round opening of the other tee-type workpiece on the outer side.

[0008] Preferably, the cylinder has a threaded hole for screwing a tightening bolt, and a countersunk hole is provided at the end of the threaded hole on the outer surface of the cylinder, the depth of which is greater than the length of the head of the tightening bolt.

[0009] Preferably, the positioning plate is detachably mounted on the side wall of the directional hole.

[0010] The advantages of this utility model are: 1. This utility model utilizes a T-shaped workpiece and a tooling fixture. A machine tool clamps one end of the T-shaped workpiece and processes the outer surface and two end faces of the cylinder. This tooling fixture can become a unified tooling fixture for products in the same batch. Subsequent processing of T-shaped workpieces utilizes the machine tool clamping this tooling fixture before processing the workpieces within the tooling fixture. Due to the uniformity of the tooling fixture, the correlation between the dimensions of the preceding and following processes is strengthened, which facilitates debugging and reduces verification time and costs.

[0011] 2. This utility model uses a blank to find the tooling. The tooling after processing can avoid the error caused by repeatedly clamping the blank, solve the blank defects, and reduce the scrap rate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a positioning and clamping fixture for a three-way workpiece; Figure 2 This is a side view of a positioning and clamping fixture for a tee-type workpiece; Figure 3 A schematic diagram of the structure of a positioning and clamping fixture for a three-way workpiece after removing the cylindrical part; Figure 4 This is a schematic diagram of the positioning plate of this utility model; Figure 5 This is a schematic diagram of the structure of the three-way workpiece of this utility model.

[0013] In the diagram: 1. Cylinder; 2. Square hole; 3. Positioning plate; 4. Tightening bolt; 5. T-shaped workpiece; 51. Positioning hole. Detailed Implementation

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] like Figures 1 to 5 As shown, a positioning and clamping fixture for a tee-type workpiece includes a cylinder 1. The cylinder 1 has an axially penetrating square hole 2 at its center. A positioning plate 3 is installed on one side of the square hole 2. The positioning plate 3 has two positioning holes 51. The size and spacing of the two positioning holes 51 are consistent with the outer diameter and spacing of the two through pipes of the tee-type workpiece 5. The tee-type workpiece 5 can be inserted into the square hole 2 with the positioning plate 3.

[0016] Two tightening bolts 4 are screwed onto the other three side walls of the square hole 2. The tightening bolts 4 can tighten the side wall of the tee-type workpiece 5 without a pipe. The two tightening bolts 4 on each side wall are distributed along the axial direction of the cylinder 1, which ensures the stability of the tightening bolts 4 when tightening the tee-type workpiece 5.

[0017] When the tee-type workpiece 5 is fixed in the direction hole through the positioning hole 51 and the tightening bolt 4, the round openings at both ends of the tee-type workpiece 5 are located outside the two end faces of the cylinder 1. The machine tool can clamp the round openings of the tee-type workpiece 5 located on the outside and process the outer surface of the cylinder 1.

[0018] This invention utilizes a T-shaped workpiece 5 and a tooling fixture. The machine tool clamps one end of the T-shaped workpiece 5 to process the outer surface and both end faces of the cylinder 1. This tooling fixture can become a unified tooling fixture for products in the same batch. The subsequent processing of the T-shaped workpiece 5 is carried out by clamping the tooling fixture with the machine tool before processing the workpieces within the tooling fixture. Due to the uniformity of the tooling fixture, the correlation between the dimensions of the preceding and following processes is strengthened, which facilitates debugging and reduces the time and cost of verification.

[0019] Furthermore, by using the blank to find the tooling, the tooling after processing can avoid the error caused by repeatedly clamping the blank, thus solving the blank defects and reducing the scrap rate.

[0020] When the machine tool clamps the outer end of a tee-type workpiece 5 located on the outer side to machine the outer surface of a cylinder 1, the machine tool's center can press against the outer end of another tee-type workpiece 5 on the outer side, further ensuring the machining accuracy of the tooling. The cylinder 1 has a threaded hole for screwing onto a tightening bolt 4. A countersunk hole is located at the end of the threaded hole on the outer surface of the cylinder 1. The depth of the countersunk hole is greater than the length of the head of the tightening bolt 4, preventing the tightening bolt 4 from interfering with the machine tool's machining process.

[0021] The positioning plate 3 can be detachably installed on the side wall of the directional hole, or a separate positioning plate 3 with two positioning holes 51 can be set to facilitate the pre-positioning of the two pipes of the tee-type workpiece 5. This is because the wall thickness of the two pipes is relatively thin and they are easy to deform. The positioning plate 3 is set separately to make a preliminary attempt to position them. If the two pipes cannot be installed in the positioning holes 51, the pipes can be reshaped and repaired.

[0022] The specific processing steps of this utility model are as follows: First, the cylinder 1 is machined by turning the outer circumference. Then, the square hole 2 is cut by wire cutting. The relevant threaded holes and connecting holes are machined. The positioning plate 3 with positioning hole 51 is installed into the square hole 2. Then, the tee-type workpiece 5 is placed into the square hole 2 and tightened using the tightening bolt 4; Clamp one end of the tee-type workpiece 5 with the machine tool chuck, and machine the outer surface and two end faces of the cylinder 1; After the tooling is completed, the T-shaped workpiece 5 is clamped with the tooling, and the machine tool chuck directly clamps the cylinder 1. Then the round opening of the T-shaped workpiece 5 can be machined.

[0023] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A positioning and clamping fixture for a tee-type workpiece, characterized in that, Includes a cylinder (1), the cylinder (1) has a square hole (2) that passes through the center axially, a positioning plate (3) is installed on one side of the square hole (2), the positioning plate (3) has two positioning holes (51), the size and spacing of the two positioning holes (51) are consistent with the outer diameter and spacing of the two through pipes of the tee-type workpiece (5), the tee-type workpiece (5) can be inserted into the square hole (2) with the positioning plate (3); Two tightening bolts (4) are screwed onto the other three side walls of the square hole (2), and the two tightening bolts (4) on each side wall are distributed along the axial direction of the cylinder (1); When the tee-type workpiece (5) is fixed in the direction hole through the positioning hole (51) and the tightening bolt (4), the round openings at both ends of the tee-type workpiece (5) are located on the outer side of the two end faces of the cylinder (1). The machine tool can clamp the round openings of the tee-type workpiece (5) located on the outer side and process the outer surface of the cylinder (1).

2. The positioning and clamping fixture for a three-way workpiece according to claim 1, characterized in that, When the machine tool clamps the round opening of the tee-type workpiece (5) located on the outside to process the outer surface of the cylinder (1), the machine tool ejector pin can press against the round opening of the other tee-type workpiece (5) on the outside.

3. The positioning and clamping fixture for a tee-type workpiece according to claim 1, characterized in that, The cylinder (1) is provided with a threaded hole and a tightening bolt (4) for screwing. The threaded hole end located on the outer surface of the cylinder (1) is provided with a countersunk hole, the depth of which is greater than the length of the head of the tightening bolt (4).

4. The positioning and clamping fixture for a three-way workpiece according to claim 1, characterized in that, The positioning plate (3) can be detachably installed on the side wall of the directional hole.

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