Core-adjustment-free positioning machining jig for materials

Abstract

The utility model discloses a material core-adjustment-free positioning processing jig which comprises a base, positioning blocks are arranged on the two sides of the end face of the base, pressing plates are arranged on the two sides of the end face of the base, and a plurality of first positioning caps and second positioning caps are arranged on the end face of the base respectively. The utility model has the beneficial effects that the step of manually adjusting the core by field staff is omitted, and meanwhile, a chip removal tool can be added. The problems of poor precision, uncontrollable manual time and the like in the technical background are solved, the threshold of operators is lowered, and the stability of the machining size of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control processing fixtures, in particular to a material core adjustment-free positioning processing fixture. Background Art

[0002] When machined products are processed in CNC machine tools, they require tooling equipment that is adapted to their own processing materials. This is called a fixture. When CNC lathes are used to process products, fixtures are often required that have both the clamping function and the auxiliary positioning function. This is called a positioning fixture. Its main function is to ensure that the workpiece has an accurate and uniform position and posture while having a clamping function during the processing process.

[0003] The fixture in the prior art is used as a clamping tool for product rough processing engineering. Its auxiliary positioning method is to make an inner diameter positioning ring and use the inner diameter of the bottom of the product to match the gap with it. However, since the material is a casting, the inner diameter of the product has a dimensional deviation of casting shrinkage. The gap match set when using the inner diameter for positioning cannot achieve precise positioning. It is necessary to manually fine-tune the product to meet the positioning requirements, which requires skills from employees and the time varies from person to person. The efficiency is not high and the quality is difficult to control.

[0004] shortcoming:

[0005] 1. The tooling currently used uses a positioning ring to position the inner diameter of the bottom surface of the product. Due to the large inner diameter of the casting and the small surface height (excluding the surface after the transition of the upper and lower R angles), the contact surface has a small matching range. The inner diameter changes greatly when the casting shrinks (shrinks) and the surface is treated (worn and enlarged) (200mm in diameter, 2 / 1000, about 0.5mm), resulting in poor positioning accuracy between the casting and the positioning ring, requiring employees to manually adjust the core;

[0006] 2. The inner diameter gap is large, and the positioning ring cannot achieve transition or interference fit with the inner diameter of the material surface, and can only be positioned by clearance fit. If the concentricity (0.1mm) of the product material is to meet the processing standard, on-site employees need to use a centering table to manually adjust the centering before clamping the material. Due to the different proficiency of employees, the time for manual centering and the stability of product size are uncontrollable;

[0007] 3. When processing the inner diameter of the product, the inner diameter and the positioning ring are matched, which reduces the space for discharging cutting fluid and iron chips in the center of the product. The heat and chips generated will cause the iron chips to accumulate in the chip groove, resulting in friction between the iron chips and the tool or workpiece, thereby increasing the cutting force and cutting temperature, making the tool easy to break. Poor chip removal will cause iron chips to accumulate during the processing, causing increased friction between the tool and the workpiece, resulting in poor surface quality of the workpiece. When chip removal is not smooth, the iron chips are not easy to clean, which can easily scratch the fixture and workpiece, affecting their positioning, thereby reducing the processing accuracy. Utility Model Content

[0008] The purpose of the utility model is to provide a material free-core adjustment positioning processing jig to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a material core-free positioning processing fixture, including a base, positioning blocks are provided on both sides of the base end surface, pressure plates are provided on both sides of the base end surface, and a plurality of first positioning caps and second positioning caps are respectively provided on the base end surfaces.

[0010] Further optimized, a circular groove with a diameter of 200 mm and a depth of 7 mm is provided in the center of the base.

[0011] For further optimization, a plurality of the first positioning caps and the second positioning caps are respectively disposed in matching holes opened at the bottom of the circular groove.

[0012] For further optimization, a through hole of φ100 mm is provided in the middle of the circular groove, and at least three chip removal grooves connected to the through hole are provided on the back of the base.

[0013] For further optimization, the pressure plate is fixedly arranged on the base by pressure plate bolts, and a pressure plate support block connected to the pressure plate is arranged on the outer side of the pressure plate.

[0014] For further optimization, the positioning blocks are arranged in an L-shape on both sides of the end surface of the base.

[0015] Beneficial Effects

[0016] The material free core adjustment positioning processing jig provided by the utility model eliminates the step of manual core adjustment by on-site employees, and can also add chip removal tools to solve the problems of poor accuracy and uncontrollable manual time mentioned in the above technical background, reduce the threshold for operators, and improve the stability of product processing dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0018] Figure 2 It is a schematic top view of the overall structure of the utility model. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Example

[0021] like Figure 1-2As shown, a material core-free positioning processing fixture includes a base 1, positioning blocks 4 are provided on both sides of the end surface of the base 1, pressing plates 3 are provided on both sides of the end surface of the base 1, and multiple first positioning caps 6 and second positioning caps 7 are respectively provided on the end surfaces of the base 1.

[0022] In this embodiment, a circular groove of φ200mm and 7mm deep is provided at the center of the base 1, and two pairs of matching holes corresponding to the two waist groove cavities of the product material are provided inside the groove, and two large positioning pins and two small positioning pins are installed in the holes.

[0023] A plurality of first positioning caps 6 and a plurality of second positioning caps 7 are respectively disposed in matching holes formed at the bottom of the circular groove.

[0024] A through hole of φ100 mm is provided in the middle of the circular groove, and at least three chip removal grooves connected to the through hole are provided on the back of the base 1 for discharging the chip liquid and iron chips accumulated in the hole.

[0025] The pressure plate 3 is fixed on the base 1 by the pressure plate bolts 5, and the outer side of the pressure plate 3 is provided with a pressure plate support block 2 connected thereto. After the pressure plate 3 is matched with the pressure plate support block 2, the upper end of the pressure plate 3 is matched with the pressure plate bolts 5 and installed on the base 1. The workpiece is fixed by tightening the pressure plate bolts 5 and then processed.

[0026] The positioning block 4 is L-shaped and arranged on both sides of the end surface of the base 1, and is suitable for other processing workpieces. It cooperates with the external right-angle part of the workpiece material to prevent mistakes and prevent the product from being placed incorrectly.

[0027] The size and position of the first positioning cap 6 and the second positioning cap 7 match the waist groove of the product, and the matching accuracy of the product gap contact surface is high (the diameter of the second positioning cap 7 is 30mm, the variation is 2 / 1000, about 0.06mm, and the diameter of the first positioning cap 6 is 15mm, the variation is 2 / 1000, about 0.03mm,), and the positioning accuracy can be ensured to be within 0.1mm;

[0028] Place the workpiece on the bottom plate for positioning and clamping. When the product is placed, the bottom hole matches the large and small positioning pins. After placing it flat, confirm that the positioning block matches properly. Use the pressing plate to lock and compact both sides of the product. After confirming that it is compacted, the product is clamped;

[0029] Two pairs of locating pins (with diameters of 15mm and 30mm) designed for the product cavity are used to position the product. Compared with the original positioning ring design using the inner diameter of the bottom surface (the positioning ring has a diameter of 200mm), the size is reduced to one-tenth, and the positioning accuracy is improved. This can save employees the time of manual centering when installing the workpiece, and the operator threshold is also lowered, reducing the processing time of the bottleneck workstation of the processed product and greatly improving the processing efficiency.

[0030] The additional benefit of switching to the positioning method using locating pins is that the inner diameter surface of the product has ample chip removal space compared to before improvement, which reduces the accumulation of iron chips in the product during processing, ensures the continuity and stability of the processing, and can increase the processing feed speed, thereby reducing the processing time.

[0031] It can unify the installation direction of the products, making the product size processing more stable.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A material core-free positioning processing jig, characterized in that: The invention comprises a base (1), positioning blocks (4) are provided on both sides of the end surface of the base (1), pressing plates (3) are provided on both sides of the end surface of the base (1), and a plurality of first positioning caps (6) and second positioning caps (7) are respectively provided on the end surface of the base (1).

2. The material core-free positioning processing jig according to claim 1, characterized in that: The base (1) has a circular groove with a diameter of 200 mm and a depth of 7 mm at the center.

3. The material core-free positioning processing jig according to claim 2, characterized in that: A plurality of the first positioning caps (6) and the second positioning caps (7) are respectively arranged in matching holes opened at the bottom of the circular groove.

4. The material core-free positioning processing jig according to claim 2, characterized in that: A through hole with a diameter of 100 mm is provided in the middle of the circular groove, and at least three chip removal grooves connected to the through hole are provided on the back of the base (1).

5. The material core-free positioning processing jig according to claim 1, characterized in that: The pressing plate (3) is fixedly arranged on the base (1) by means of pressing plate bolts (5), and a pressing plate support block (2) connected thereto is provided on the outer side of the pressing plate (3).

6. The material core-free positioning processing jig according to claim 1, characterized in that: The positioning blocks (4) are arranged in an L-shape on both sides of the end surface of the base (1).

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