Auxiliary positioning device for special drilling and reaming machine

Abstract

An auxiliary positioning device for a special drilling and reaming machine comprises a base, a vertical plate is arranged on the base, at least two positioning devices are arranged on one side of the vertical plate, at least two pressing devices are arranged on the other side of the vertical plate, at least two positioning holes are formed in the vertical plate and used for the positioning devices to position products, an elastic supporting rod is fixed to the base, and the elastic supporting rod is fixed to the base. The elastic supporting rod is located below the pressing device and used for supporting a product.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to an auxiliary positioning device for a drilling and reaming machine. Background Technology

[0002] After die casting, certain products (such as motorcycle cylinder heads) are typically positioned and machined using the core-pulling hole of the blank. However, in existing technology, the blank is usually placed flat on an auxiliary device, and the positioning shaft of the auxiliary device is inserted into the core-pulling hole for positioning. Then, the side of the blank without the core-pulling hole is machined using a machine tool. Because the positioning shaft is inserted into the core-pulling hole, it cannot be machined. Therefore, after machining the side without the core-pulling hole, the product needs to be removed, and certain structures on that side are used for positioning before machining the core-pulling hole again to complete the entire product's machining. This method requires two positioning and two machining operations, which is inefficient. Furthermore, the two positioning operations can lead to significant variations in the machining positions of the holes, increasing the risk of not meeting dimensional accuracy requirements. Summary of the Invention

[0003] To address the aforementioned problems, this utility model proposes an auxiliary positioning device for a drilling and reaming machine. It fixes the product by first positioning and then clamping. After clamping the product, the positioning device is rotated to expose the core hole of the product, allowing the product to be processed in one operation by the machine tool.

[0004] The technical solution of this utility model is as follows: an auxiliary positioning device for a drilling and reaming machine, including a base, a vertical plate on the base, at least two positioning devices on one side of the vertical plate, at least two clamping devices on the other side, at least two positioning holes on the vertical plate for positioning the product by the positioning devices, and an elastic support rod fixed on the base, which is located below the clamping devices and is used to support the product.

[0005] Preferably, the positioning device includes a first hydraulic rotary cylinder, the piston rod of the first hydraulic rotary cylinder having a rotating arm fixed circumferentially, and the free end of the rotating arm being fixedly connected to a positioning shaft.

[0006] Preferably, a stepped bushing is fitted onto the positioning shaft, and a spring is provided in the large diameter section of the stepped bushing, while the small diameter section passes through the positioning hole provided on the vertical plate along with the positioning shaft to position the product.

[0007] Preferably, the vertical plate is provided with at least two arc-shaped grooves for guiding the rotation of the positioning shaft, and a positioning hole is provided at one end of the arc-shaped groove.

[0008] Preferably, the clamping device includes a second hydraulic rotary cylinder, and a pressure block is circumferentially fixed on the piston rod of the second hydraulic rotary cylinder.

[0009] Preferably, the vertical plate is provided with multiple processing holes.

[0010] The advantages of this utility model are as follows: By setting a vertical plate on the base, and setting a positioning device on one side of the vertical plate, and a clamping device and an elastic support rod on the other side, the product is first positioned by the positioning shaft of the positioning device, and then the product is limited and fixed by the clamping device and the elastic support rod. Then the positioning shaft is rotated to make room, so that the machine tool can complete the product processing in one go. Compared with traditional equipment, it reduces the number of product clamping and positioning, eliminates the structure used for secondary positioning in traditional equipment, avoids the processing errors caused by secondary positioning, reduces processing costs, and improves positioning accuracy and work efficiency. Attached Figure Description

[0011] Figure 1 This is the overall assembly drawing of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the positioning device of this utility model during side positioning;

[0014] Figure 4 This is a schematic diagram of the positioning device of this utility model when it is side-yielding;

[0015] Figure 5 This is a schematic diagram of the side structure of the clamping device of this utility model. Detailed Implementation

[0016] See Figures 1 to 5An auxiliary positioning device for a drilling and reaming machine includes a base 31, on which a vertical plate 32 is mounted. At least two positioning devices 33 are mounted on one side of the vertical plate 32. In this embodiment, two positioning devices 33 are used, but three, four, or more than two positioning devices 33 can also be used. Each positioning device 33 includes a first hydraulic rotary cylinder 331. A rotating arm 333 is circumferentially fixed to the piston rod 332 of the first hydraulic rotary cylinder 331. A positioning shaft 334 is fixedly connected to the free end of the rotating arm 333. A stepped bushing 335 is fitted onto the positioning shaft 334. A spring 336 is installed in the larger diameter section of the stepped bushing 335, and the smaller diameter section passes through a positioning hole 321 on the vertical plate 32 along with the positioning shaft 334 to position the product 4. This design aims to improve positioning accuracy. The vertical plate 32 is provided with at least two arc-shaped grooves 322 for guiding the rotation of the positioning shaft 334. A positioning hole 321 is provided at one end of each arc-shaped groove 322. This design ensures that the positioning shaft 334 can move along the arc-shaped groove 322 to the positioning hole 321 at the end of the groove, thus achieving precise positioning and avoiding inaccurate positioning. In this embodiment, two arc-shaped grooves 322 are provided; however, more than two can be provided, as long as the number matches that of the positioning devices 33. At least two clamping devices 34 are provided on the other side. In this embodiment, two clamping devices 34 are provided; however, three, four, or more can also be provided. Each clamping device 34 includes a second hydraulic rotary cylinder 341, with a pressure block 342 circumferentially fixed to the piston rod of the second hydraulic rotary cylinder 341. The vertical plate 32 is provided with at least two positioning holes 321 for positioning the product 4 by the positioning device 33. In this embodiment, two positioning holes 321 are provided, but more than two positioning holes 321 can also be provided, as long as the number is the same as that of the positioning device 33. The vertical plate 32 is provided with multiple processing through holes 323, which allow the left-side processing device 1 to process the product 4 through the processing through holes 323. An elastic support rod 35 is fixed on the base 31. The elastic support rod 35 is located below the clamping device 34 and is used to support the product 4. This prevents the product 4 from shifting downwards due to gravity after the positioning shaft 334 is moved away, which would increase processing errors or even cause incorrect processing positions and scrap the product.

[0017] The usage process of this utility model is as follows: The product 4 is installed on the auxiliary fixture 3. After aligning the core-pulling hole of the product 4 with the positioning hole 321 on the vertical plate 32 of the auxiliary fixture 3, the first hydraulic rotary cylinders 331 of the two positioning devices 33 drive their respective rotating arms 333, causing the positioning shafts 334, whose free ends are fixed, to rotate along the arc-shaped groove 322 to above the positioning hole 321. The first hydraulic rotary cylinders 331 then press down, driving the positioning shafts 334 to insert into the core-pulling hole of the product 4 through the positioning hole 321, thus forming a positioning. Figure 3 Then, the second hydraulic rotary cylinders 341 of the two clamping devices 34 drive their respective pressure blocks 342 to clamp and fix the product 4, while the elastic support rod 35 supports and fixes the product 4. The product is fixed by the two pressure blocks 342 and the elastic support rod 35, thus ensuring the product position is fixed and achieving positioning. Then, the first hydraulic rotary cylinders 331 of the two positioning devices 33 first lift up, so that the two positioning shafts 334 exit the core-pulling hole of the product 4. The two first hydraulic rotary cylinders 331 then drive their respective rotating arms 333, so that the positioning shafts 334 fixed at the free end of each rotating arm 333 rotate along the arc groove 322 to the other end, exposing the core-pulling hole of the product 4 to be processed. Figure 4 Finally, the product 4 is processed simultaneously by the left processing device 1 and the right processing device 2. The left processing device 1 can process the product 4 through the positioning hole 321 and the processing through hole 323 on the vertical plate 32. After processing, the product 4 can be removed.

Claims

1. An auxiliary positioning device for a drilling and reaming machine, characterized in that: Includes a base (31), on which a vertical plate (32) is provided. At least two positioning devices (33) are provided on one side of the vertical plate (32), and at least two pressing devices (34) are provided on the other side. At least two positioning holes (321) are provided on the vertical plate (32) for positioning the product (4) by the positioning devices (33). An elastic support rod (35) is fixed on the base (31). The elastic support rod (35) is located below the pressing device (34) and is used to support the product (4).

2. The auxiliary positioning device for a drilling and reaming machine according to claim 1, characterized in that: The positioning device (33) includes a first hydraulic rotary cylinder (331), the piston rod (332) of the first hydraulic rotary cylinder (331) is circumferentially fixed with a rotating arm (333), and the free end of the rotating arm (333) is fixedly connected with a positioning shaft (334).

3. The auxiliary positioning device for a drilling and reaming machine according to claim 2, characterized in that: A stepped bushing (335) is fitted on the positioning shaft (334). A spring (336) is provided in the large diameter section of the stepped bushing (335). The small diameter section passes through the positioning hole (321) provided on the vertical plate (32) along with the positioning shaft (334) to position the product (4).

4. The auxiliary positioning device for a drilling and reaming machine according to claim 1, characterized in that: The vertical plate (32) is provided with at least two arc-shaped grooves (322) for guiding the rotation of the positioning shaft (334), and a positioning hole (321) is provided at one end of the arc-shaped groove (322).

5. The auxiliary positioning device for a drilling and reaming machine according to claim 1, characterized in that: The clamping device (34) includes a second hydraulic rotary cylinder (341), and a pressure block (342) is circumferentially fixed to the piston rod of the second hydraulic rotary cylinder (341).

6. The auxiliary positioning device for a drilling and reaming machine according to claim 1, characterized in that: The vertical plate (32) is provided with multiple processing holes (323).

Images