Box body horizontal machining hydraulic clamp

Abstract

The utility model relates to a hydraulic clamp for horizontal machining of a box body. The hydraulic clamp comprises a clamp bottom plate, a vertical plate, a coarse limiting block, a coarse limiting column, a positioning block, an oil path block, a quick-change connector, a switching valve, a sequence valve and an energy accumulator. A vertical plate is arranged at one end of the clamp bottom plate; a through hole is formed in the middle of the vertical plate; a plurality of positioning blocks are arranged on the side surface of the vertical plate in the circumferential direction of the through hole; three thick limiting blocks are arranged on the side surface of the vertical plate and the left side of the through hole; two thick limiting columns are arranged on the side surface of the vertical plate and the right side of the through hole; a sequence valve is arranged on the side surface of the vertical plate; an oil path block, a switch valve and an energy accumulator are respectively arranged at one corner of the clamp bottom plate; a quick-change connector is arranged on the side face of the oil path block. Single-acting corner clamping cylinders are arranged on the side surfaces of the vertical plates and on the outer sides of the positioning blocks; and a pressing nail is arranged at the end part of a pressing plate of the single-action corner clamping cylinder. The clamp provided by the utility model has strong universality and universality.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing fixtures, in particular to a box horizontal hydraulic fixture. Background Art

[0002] The requirements for outboard motors are very high, such as light weight, high power, long life, etc. This will inevitably put pressure on its main components, such as the gear box (such as Figures 8-9 As shown in the figure, the company has put forward higher requirements. Under the high requirements of lightweight, high-performance aluminum is used first, and its wall thickness must be uniform and small, which makes it strange in shape and not conducive to positioning and clamping in mechanical processing. The small wall thickness leads to easy deformation and even cracking. In order to pursue high power and long life, its dimensional accuracy is constantly raised, which challenges the limits of manufacturers again and again, and is also the biggest problem currently troubling.

[0003] Existing processing fixtures are generally open manual fixtures. Although it is convenient to load and unload products, the support of the small end is always unstable. Due to the strange shape, only point support can be used. If there are too few support points, the support effect is not good. The size is unstable during processing. If there are too many support points, the operation is time-consuming and laborious. There are also hydraulic fixtures that increase the support points. Although the support effect is improved, the overall rigidity of the fixture is insufficient, resulting in large fluctuations in product size. Utility Model Content

[0004] The utility model mainly solves the technical problems of unstable support in the prior art. For this purpose, a horizontal hydraulic clamp for a special-shaped gear box is designed. Considering the high dimensional accuracy of the special-shaped gear box, a high-precision horizontal machining center is selected to focus on the fine machining of the gear box. A frame-type main structure is adopted, which has sufficient rigidity to set various mechanisms on it. Except for the key inner hole of the large end of the gear box, other positioning surfaces and pin holes have been processed. For this purpose, positioning pins, positioning blocks, support cylinders and other mechanisms are set on the vertical plate of the frame to complete the clamping of the gear box in this clamp. However, its small end is in a suspended state. For this reason, support cylinder seats and support cylinders are set on the clamp bottom plate and horizontal plate of the frame to provide all-round support for the small end. The above clamping scheme completely eliminates the clamping deformation of the gear box product and provides a guarantee for subsequent stable processing. In addition, a through hole is opened at the position of the vertical plate corresponding to the large end of the gear box body to expose the unprocessed inner hole. In this way, through the rotation function of the horizontal machining center worktable, all key dimensions can be clamped and processed at one time, so that the dimensional accuracy of the gear box body reaches a high-precision level. Coupled with the advantages of high efficiency and stability of the hydraulic clamp, this clamp solution is the preferred one, and it can also be applied to most horizontal machining centers, can be widely used, and can fundamentally solve the above-mentioned problems.

[0005] The horizontal machining center hydraulic fixture for a special-shaped gearbox body of the utility model mainly includes functions such as a high-rigidity frame, positioning blocks that can position both the surface and holes, rough limit and clamping protection, all-round support, elastic push wheels, and high-life hydraulic components. It is used on a high-precision horizontal machining center, with high efficiency and stability, and is a very preferred solution.

[0006] This fixture is realized as follows: The high-rigidity frame, which is the main body of this fixture, is mainly composed of a fixture base plate, vertical plates, rib plates, and cross plates. All are made of thick steel plates and are connected to each other by large-sized hexagon socket head cap screws and cylindrical pins, having sufficient rigidity, especially providing guarantee for the support of the small end of the gearbox body.

[0007] There are a total of four positioning blocks that can position both the surface and holes. Their top planes form a large plane for surface positioning with the bottom surface of the large end of the gearbox body. Among them, a cylindrical pin is set on the top surface of the upper right positioning block, and a diamond pin is set on the top surface of the lower left positioning block. These two pins are used for hole positioning with the positioning holes of the large end. Through the integration of components, the fixture is both streamlined and functional.

[0008] For rough limit and clamping protection, this fixture is provided with three rough limit blocks and two rough limit posts, all made of high-hardness and high-wear-resistant plastic materials. Even if there is a collision with the gearbox body product during the process of loading and unloading the product, it will not cause any damage to the product, effectively protecting the product. In addition, the rough limit posts adopt an eccentric design. By rotating the rough limit posts, the rough limit space can be adjusted. Especially when there are reasonable fluctuations in the blank surfaces of products in different batches, this fixture can easily adjust to ensure a reasonable rough limit space, having a certain flexibility. The material of the pressing nail is also selected as the same plastic, which can not only ensure sufficient clamping force but also protect the product. In addition, a single-acting rotary clamping cylinder is selected, which not only plays a clamping role but also simplifies the hydraulic oil circuit, is easy to process the fixture parts, and is more conducive to subsequent maintenance and repair.

[0009] For all-round support, fixed seats, support cylinder seats, and support cylinders are set on the base plate of the frame, and support cylinder seats and support cylinders are set on the cross plate. A total of nine support cylinders are set here to provide all-round support for the small end of the gearbox body product, completely eliminating the risk of tremor during the machining process of the small end, and thus ensuring high precision of the product dimensions. When the gearbox body product is placed in the fixture and completed positioning and clamping, all the support cylinders will support the product. At this time, a closed loop is formed between the fixture and the product, and there is no suspended part, which improves the overall rigidity and is conducive to subsequent stable machining.

[0010] The elastic pushing wheel will come into contact with the pushing wheel first when the gearbox body product is loaded into the fixture. As the product continues to move, it will push against the pushing wheel and cause it to retract. After the product is completely loaded into the fixture, the pushing wheel will extend under the action of the spring force and get stuck on the rounded surface inside the large-end flange of the product to pre-clamp the product, making preparations for subsequent clamping.

[0011] A horizontal machining center hydraulic fixture for a special-shaped gearbox body of the present utility model includes a frame assembly, a positioning block assembly, a rough limit assembly, a clamping assembly, a support assembly, an elastic pushing wheel assembly, a single-acting rotary clamping cylinder, a support cylinder, a sequence valve, an accumulator, etc.

[0012] The present utility model provides a horizontal machining center hydraulic fixture for a box body, including: a fixture bottom plate, a vertical plate, a rough limit block, a rough limit column, a positioning block, an oil circuit block, a quick-change joint, a switch valve, a sequence valve, and an accumulator;

[0013] One end of the fixture bottom plate is provided with a vertical plate; a through hole is provided in the middle of the vertical plate; a plurality of positioning blocks are provided on the side of the vertical plate and circumferentially around the through hole; three rough limit blocks are provided on the left side of the through hole on the side of the vertical plate; two rough limit columns are provided on the right side of the through hole on the side of the vertical plate; a sequence valve is provided on the side of the vertical plate;

[0014] An oil circuit block, a switch valve, and an accumulator are respectively provided at a corner of the fixture bottom plate; a quick-change joint is provided on the side of the oil circuit block.

[0015] Furthermore, a single-acting rotary clamping cylinder is provided on the side of the vertical plate and outside the positioning block; a pressing nail is provided at the end of the pressing plate of the single-acting rotary clamping cylinder.

[0016] Furthermore, a cross plate is provided at the upper end of the side of the vertical plate; an L-shaped plate is provided at the end of the cross plate; four support cylinders are provided on the lower surface of the contact end of the L-shaped plate and the cross plate; one support cylinder is provided at the end of the L-shaped plate away from the cross plate.

[0017] Furthermore, a fixed seat is provided at the position on the fixture bottom plate corresponding to the L-shaped plate up and down; one support cylinder is provided on one side of the fixed seat; a support cylinder base is provided on the other side of the fixed seat; three support cylinders are provided on the support cylinder base.

[0018] Furthermore, a pushing wheel assembly is provided on the side of the vertical plate and below the cross plate; the pushing wheel includes: a pushing wheel base, a sliding rod, a pushing wheel, a spring, and a set screw;

[0019] A through hole in the vertical direction is provided at the end of the pushing wheel base; the sliding rod is slidably arranged in the through hole; guide sleeves are sleeved at both ends of the sliding rod; a limiting hole is provided on the side of the sliding rod; a screw is fitted in the limiting hole;

[0020] A push wheel is provided at the lower end of the sliding rod; a groove is provided at the upper end of the sliding rod; a spring is provided in the groove; a set screw is provided in cooperation with the upper end of the spring; the set screw is provided on the upper side of the base of the push wheel.

[0021] Further, there are four positioning blocks; the four positioning blocks are arranged in a rectangle on the circumferential direction of the through hole; a cylindrical pin and a diamond pin are respectively provided on a pair of diagonal positioning blocks.

[0022] Further, the rough limit block and the rough limit post are respectively made of plastic material.

[0023] Further, a rib plate is provided on the side of the vertical plate facing away from the horizontal plate.

[0024] Further, the fixture base plate, the vertical plate, the horizontal plate and the rib plate are all made of steel material.

[0025] Compared with the prior art, the horizontal boring machine hydraulic fixture for the box body provided by the present utility model has the following advantages:

[0026] 1. The processing fixture of the present utility model adopts all-round support. A fixed seat, a support cylinder seat and a support cylinder are provided on the bottom plate of the frame, and a support cylinder seat and a support cylinder are provided on the horizontal plate. A total of nine support cylinders are provided here, which provide all-round support for the small end of the gear box body product, completely eliminating the risk of tremor during processing of the small end, with stable support, and thus ensuring high precision of the product dimensions.

[0027] 2. The processing fixture of the present utility model is provided with three rough limit blocks and two rough limit posts, all made of plastic material with high hardness and high wear resistance. Even if there is a collision with the gear box body product during the process of loading and unloading the product, it will not cause any damage to the product, effectively protecting the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the overall schematic diagram of the horizontal boring machine hydraulic fixture of the present utility model loaded with the gear box body product Figure 1 ;

[0029] Figure 2 is the structural schematic diagram of the horizontal boring machine hydraulic fixture of the present utility model Figure 1 ;

[0030] Figure 3 is the structural schematic diagram of the horizontal boring machine hydraulic fixture of the present utility model Figure 2 ;

[0031] Figure 4 is the overall schematic diagram of the horizontal boring machine hydraulic fixture of the present utility model loaded with the gear box body product Figure 2 ;

[0032] Figure 5 is the cross-sectional view of the push wheel of the present utility model;

[0033] Figure 6 It is a schematic structural diagram of the pushing wheel of the present utility model;

[0034] Figure 7 It is a top view of the pushing wheel of the present utility model;

[0035] Figure 8 It is a left view of the gear box product of the present utility model.

[0036] Figure 9 It is a top view of the gear box product of the present utility model.

[0037] Reference numerals: 1, workbench; 2, fixture base plate; 3, vertical plate; 4, rough limit block; 5, rough limit column; 6, pushing wheel assembly; 7, positioning hole; 8, cylindrical pin; 9, diamond pin; 10, large positioning surface; 11, positioning block; 12, fillet surface; 13, oil circuit block; 14, quick-change joint; 15, switch valve; 16, single-acting rotary clamping cylinder; 17, sequence valve; 18, support cylinder; 19, accumulator. Detailed implementation manners

[0038] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of description, only parts related to the present utility model are shown in the drawings rather than all the content.

[0039] As Figure 1 shown, a horizontal machining center hydraulic fixture for a box body provided by an embodiment of the present utility model includes: a fixture base plate 2, a vertical plate 3, a rough limit block 4, a rough limit column 5, a positioning block 11, an oil circuit block 13, a quick-change joint 14, a switch valve 15, a sequence valve 17 and an accumulator 19;

[0040] One end of the fixture base plate 2 is provided with a vertical plate 3; a through hole is provided in the middle of the vertical plate 3; the position of the through hole corresponds to the position of the hole in the middle of the large positioning surface 10 of the workpiece; when machining the hole in the middle of the large positioning surface 10 of the workpiece, the cutting tool can pass through the through hole and then perform machining. A plurality of positioning blocks 11 are arranged circumferentially on the side surface of the vertical plate 3 around the through hole, and the number of the positioning blocks 11 is four; the four positioning blocks 11 are arranged in a rectangle circumferentially around the through hole; a cylindrical pin is provided on the positioning block 11 located in the upper right of the through hole; a diamond pin is provided on the positioning block 11 located in the lower left of the through hole.

[0041] Three rough limit blocks 4 are arranged on the side of the vertical plate 3 and on the left side of the through hole; two rough limit columns 5 are arranged on the side of the vertical plate 3 and on the right side of the through hole; a sequence valve 17 is arranged on the side of the vertical plate 3; a single-acting angle clamping cylinder 16 is arranged on the side of the vertical plate 3 and outside the positioning block 11; a pressing nail is arranged on the pressure plate end of the single-acting angle clamping cylinder 16. A horizontal plate is arranged on the upper end of the side of the vertical plate 3; an L-shaped plate is arranged on the end of the horizontal plate; four support cylinders 18 are arranged on the lower surface of the contact end of the L-shaped plate with the horizontal plate; and one support cylinder 18 is arranged on the end of the L-shaped plate away from the horizontal plate.

[0042] A push wheel assembly 6 is arranged on the side of the vertical plate 3 and the lower side of the horizontal plate; the push wheel 6 includes: a push wheel base, a slide bar, a push wheel, a spring and a top screw; a vertical through hole is arranged at the end of the push wheel base; a slide bar is slidably arranged in the through hole; guide sleeves are sleeved at both ends of the slide bar; a limiting hole is arranged on the side of the slide bar; a screw is arranged in the limiting hole; a push wheel is arranged at the lower end of the slide bar; a groove is arranged at the upper end of the slide bar; a spring is arranged in the groove; a top screw is arranged at the upper end of the spring; the top screw is arranged on the upper side of the push wheel base. A rib plate is arranged on the side of the vertical plate 3 away from the horizontal plate.

[0043] An oil block 13, a switch valve 15 and an accumulator 19 are respectively arranged at one corner of the fixture bottom plate 2; a quick-change joint 14 is arranged on the side of the oil block 13. A fixing seat is arranged on the fixture bottom plate 2 at the upper and lower positions corresponding to the L-shaped plate; a support cylinder 18 is arranged on one side of the fixing seat; a support cylinder base is arranged on the other side of the fixing seat; and three support cylinders 18 are arranged on the support cylinder base.

[0044] The coarse limit block 4 and the coarse limit column 5 are made of plastic. The fixture bottom plate 2, the vertical plate 3, the horizontal plate and the rib plate are all made of steel.

[0045] Working principle of the utility model: First, the hydraulic clamp is hoisted onto the workbench 1 of the high-precision horizontal machining center, and the clamp bottom plate 2 is positioned and clamped with the workbench 1. Then, the large end of the gear box product is facing the vertical plate 3, and it is placed in the clamp horizontally with both hands. Be careful not to collide with the parts on the clamp during the placement process. When the product is roughly within the range of the coarse limit block 4 and the coarse limit column 5, the product is moved toward the vertical plate 3. It will first contact with the push wheel 6. Continue to move the product, and the push wheel 6 retracts. Then the positioning hole 7 of the product contacts and positions the cylindrical pin 8 and the diamond pin 9. Finally, the large positioning surface 10 of the large end contacts and the top surface of the positioning block 11 to complete the surface positioning. At this time, the push wheel 6 will extend out under the action of its internal spring elastic force, and get stuck on the fillet surface 12 on the inner side of the flange of the large end of the product to pre-clamp the product.

[0046] Next, insert the outlet pipe of the hydraulic station into the quick-change joint 14 of the oil circuit block 13, turn on the switch valve 15 on the fixture, and press the pressure switch of the hydraulic station to start pressurizing. First, the four single-acting rotary clamping cylinders 16 start to act, rotate and lower the pressure plate to clamp the gearbox body product. Subsequently, under the action of the sequence valve 17, the nine support cylinders 18 start to act, push the blank surface at the small end of the ejector rod and hold the ejector rod tightly to complete the all-round support of the small end.

[0047] Finally, confirm whether each positioning part and clamping part are correct and reliable. After passing the inspection, turn off the pressure switch of the hydraulic station and the switch valve 15 on the fixture, and then pull out the oil pipe of the hydraulic station. At this time, the accumulator 19 located on the bottom plate 2 starts to function to balance the oil pressure in the fixture and keep it within the set range all the time. Thus, the clamping of the gearbox body product is completed, and the gearbox body product can be debugged and processed.

[0048] When the machining of the gearbox body product is completed, first blow off the residues such as chips and cutting fluid on the fixture, then insert the return pipe of the hydraulic station into the quick-change joint 14 of the oil circuit block 13, turn on the switch valve 15 on the fixture, and start depressurizing. The pressure plates on all the single-acting rotary clamping cylinders 16 retract to the initial position, and the ejector rods of all the support cylinders 18 also retract to the initial position under the action of the spring force inside them. Turn off the switch valve 15 on the fixture, pull out the oil pipe of the hydraulic station, and finally move the gearbox body product in the direction away from the vertical plate 3, and slowly take it out outward after passing over the pressure plate of the single-acting rotary clamping cylinder 16. When installing the product again, repeat the above steps.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: making modifications to the technical solutions recorded in the foregoing embodiments, or making equivalent replacements to some or all of the technical features therein, does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A box horizontal hydraulic clamp, characterized in that: include: A fixture bottom plate (2), a vertical plate (3), a coarse limit block (4), a coarse limit column (5), a positioning block (11), an oil circuit block (13), a quick-change connector (14), a switch valve (15), a sequence valve (17) and an accumulator (19); A vertical plate (3) is arranged at one end of the clamp bottom plate (2); a through hole is arranged in the middle of the vertical plate (3); A plurality of positioning blocks (11) are arranged on the side of the vertical plate (3) and in the circumference of the through hole; three rough limit blocks (4) are arranged on the side of the vertical plate (3) and on the left side of the through hole; two rough limit columns (5) are arranged on the side of the vertical plate (3) and on the right side of the through hole; and a sequence valve (17) is arranged on the side of the vertical plate (3); An oil circuit block (13), a switch valve (15) and an accumulator (19) are respectively arranged at one corner of the clamp bottom plate (2); a quick-change connector (14) is arranged on the side of the oil circuit block (13).

2. The box horizontal hydraulic clamp according to claim 1 is characterized in that: A single-acting corner clamping cylinder (16) is arranged on the side of the vertical plate (3) and the outside of the positioning block (11); and a pressing nail is arranged at the end of the pressing plate of the single-acting corner clamping cylinder (16).

3. The box horizontal hydraulic clamp according to claim 1 is characterized in that: A horizontal plate is arranged at the upper end of the side of the vertical plate (3); an L-shaped plate is arranged at the end of the horizontal plate; four supporting cylinders (18) are arranged on the lower surface of the end of the L-shaped plate in contact with the horizontal plate; and a supporting cylinder (18) is arranged at the end of the L-shaped plate away from the horizontal plate.

4. The box horizontal hydraulic clamp according to claim 3 is characterized in that: A fixing seat is arranged on the fixture bottom plate (2) at positions corresponding to the upper and lower positions of the L-shaped plate; a supporting cylinder (18) is arranged on one side of the fixing seat; a supporting cylinder base is arranged on the other side of the fixing seat; and three supporting cylinders (18) are arranged on the supporting cylinder base.

5. The box horizontal hydraulic clamp according to claim 1 is characterized in that: A push wheel assembly (6) is arranged on the side of the vertical plate (3) and the lower side of the horizontal plate; the push wheel assembly (6) comprises: a push wheel base, a slide rod, a push wheel, a spring and a top screw; A vertical through hole is arranged at the end of the push wheel base; a slide rod is slidably arranged in the through hole; guide sleeves are sleeved at both ends of the slide rod; a limiting hole is arranged on the side of the slide rod; a screw is matched in the limiting hole; A pushing wheel is arranged at the lower end of the slide bar; a groove is arranged at the upper end of the slide bar; a spring is arranged in the groove; a top screw is arranged at the upper end of the spring; and the top screw is arranged at the upper side of the pushing wheel base.

6. The box horizontal hydraulic clamp according to claim 1, characterized in that: There are four positioning blocks (11); the four positioning blocks (11) are arranged in a rectangular shape in the circumferential direction of the through hole; a pair of positioning blocks (11) located on the diagonal line are respectively provided with a cylindrical pin and a diamond pin.

7. The box horizontal hydraulic clamp according to claim 1, characterized in that: The coarse limiting block (4) and the coarse limiting column (5) are respectively made of plastic material.

8. The box horizontal hydraulic clamp according to claim 3 is characterized in that: A rib plate is provided on the side of the vertical plate (3) facing away from the horizontal plate.

9. The box horizontal hydraulic clamp according to claim 7, characterized in that: The fixture bottom plate (2), vertical plate (3), horizontal plate and rib plate are all made of steel.

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