Crankshaft box body closing machining clamp

Abstract

The utility model relates to the field of clamp tools, in particular to a crankcase closing machining clamp which comprises a clamp body, the clamp body comprises an inclined main plate and a supporting plate parallel to the main plate, a plurality of clamping pieces are arranged on the main plate, and the supporting plate is arranged among the clamping pieces and can ascend and descend in the direction perpendicular to the main plate. A lifting driving piece used for driving the supporting plate to ascend and descend is arranged on the main plate, a guide mechanism is connected between the supporting plate and the main plate, and a positioning mechanism is arranged on the supporting plate. The tool can align a product, so that the to-be-machined surface of the product is perpendicular to the tool, and machining is convenient; and the problems of high feeding difficulty and high paint surface damage risk in the machining process can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fixture tooling, in particular to a crankcase body jointing machining fixture. BACKGROUND

[0002] In the processing of the motorcycle engine case body as shown in the drawings, Figure 1 The cylinder body joint surface 8 of the case body cannot be perpendicular to the processing tool when the cylinder body joint surface 8 is processed if the case body is directly fixed on the fixture with the joint cover surface 83 downward.

[0003] In order to solve the above problems, the inventor designs a fixture for oblique fixing of the engine case body, which compensates for the included angle of the engine case body through the oblique angle of the fixture, so that the cylinder body joint surface 8 of the engine case body can be perpendicular to the processing tool after the engine case body is obliquely fixed on the fixture for processing.

[0004] Because the product adopts an upper and lower case jointing structure, the positioning reference surface is the jointing surface 84, that is, the interface position of the upper and lower case jointing. Therefore, in the positioning process, the lower case body 86 needs to be accurately dropped into the positioning members to ensure accurate cooperation of the positioning members with the jointing surface 84 and complete positioning. This positioning method puts forward very high requirements on the feeding accuracy, and the product must be dropped into the positioning members without deviation, thereby increasing the complexity and difficulty of the feeding operation and reducing the clamping efficiency. In addition, the product is easy to collide with the positioning members during the dropping process, thereby increasing the risk of paint surface damage. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide a crankcase body jointing machining fixture to align the product, so that the cylinder body joint surface of the product is perpendicular to the tool for convenient processing and solving the problems of great feeding difficulty and great risk of paint surface damage in the processing process.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The crankcase body jointing machining fixture comprises a fixture body, the fixture body comprises an inclined main plate and a supporting plate parallel to the main plate, a plurality of clamping members are arranged on the main plate, the supporting plate is arranged between the plurality of clamping members and can be lifted in the direction perpendicular to the main plate, a lifting driving member for driving the supporting plate to lift is arranged on the main plate, a guide mechanism is connected between the supporting plate and the main plate, and a positioning mechanism is arranged on the supporting plate.

[0008] Preferably, as an improvement, the clamping member comprises a supporting seat, a clamping cylinder and a supporting block are arranged on the supporting seat, and the supporting block is used for supporting below the edge of the workpiece to cooperate with the clamping cylinder to clamp the workpiece.

[0009] Preferably, as an improvement, the main plate is further provided with a positioning seat, the positioning seat is provided with a positioning rod, and the supporting seat is also provided with a positioning rod.

[0010] Preferably, as an improvement, the supporting block is provided with an airtight detection hole, and the airtight detection hole is in communication with an airtight detection mechanism of the machine tool.

[0011] Preferably, as an improvement, the supporting seat is three and is distributed in a triangular shape.

[0012] Preferably, as an improvement, the positioning rod on the positioning seat and the positioning rod on the supporting seat are oppositely arranged.

[0013] Preferably, as an improvement, the positioning mechanism comprises a positioning pin, an equal-height block and a limiting block, the limiting block is used for inserting into the inner contour of the workpiece to limit the workpiece, and the height difference between the limiting block and the equal-height block is 40-50mm.

[0014] Preferably, as an improvement, the guiding mechanism comprises a guiding rod, the guiding rod is vertically arranged in the supporting plate, the surface of the supporting plate is fixed with an anti-dropping block, the anti-dropping block is fixedly connected with the guiding rod, the main plate is provided with a guiding hole, and the guiding rod is slidingly connected in the guiding hole.

[0015] Preferably, as an improvement, the device further comprises a quick-change base plate, the quick-change base plate is connected with the rotating center of the machine tool, the clamping body is detachably connected on the quick-change base plate, and the clamping body is fixed with a lifting ring.

[0016] Preferably, as an improvement, the inclination angle of the main plate is 30 degrees.

[0017] The principle and beneficial effects of the scheme are as follows:

[0018] 1. According to the scheme, the main plate and the supporting plate are inclined by 30 degrees, so that the workpiece can be aligned after being clamped on the clamping body, the cylinder body joint surface is in a vertical state, and the machining tool is kept vertical, thereby facilitating accurate machining.

[0019] On this basis, the supporting plate is designed to be lifted vertically along the main plate to optimize the clamping process of the workpiece. In actual operation, first, the supporting plate is lifted to a position higher than the clamping part, and the positioning mechanism on the supporting plate is used to preliminarily position the workpiece. Then, the supporting plate is lowered, so that the workpiece is stably placed on the supporting block, and finally, firm clamping is achieved through the clamping cylinder. This design avoids the complex operation of directly placing the workpiece into the space between multiple clamping parts, reduces the risk of interference between the workpiece and the clamping part, and simplifies the workpiece positioning process. At the same time, this method effectively prevents the problem of paint damage caused by the collision between the workpiece surface and the clamping part. If the lifting supporting plate is not set, the workpiece must be accurately placed into the space surrounded by multiple clamping parts. Since the space has a certain depth, it is difficult to accurately place the workpiece, and the workpiece surface is easily damaged due to improper operation. At the same time, the main plate and the supporting plate inclined at an angle of 30 degrees also facilitate the loading of the workpiece. Compared with placing the workpiece on a positioning table with a larger inclination angle or horizontally, the worker loads more easily.

[0020] In summary, the design of the lifting supporting plate not only improves the efficiency and accuracy of workpiece clamping, but also significantly reduces the risk of workpiece surface damage, improving the overall machining quality.

[0021] 2. The positioning pin is used to insert into the corresponding positioning hole of the workpiece, and the equal height block is used to level the surface of the workpiece in contact with the supporting plate, so that the workpiece is better positioned. The limiting block is used to insert into the inner contour of the workpiece to limit the workpiece, avoid the workpiece from sliding down, and ensure the stability of the workpiece positioning. When the height difference between the limiting block and the equal height block is between 40-50㎜, the limiting block can provide good limiting effect. If the height is less than 40㎜, the workpiece may fall and slide. If the height is greater than 50㎜, it will interfere with the contour.

[0022] 3. After the workpiece is lowered into place with the supporting plate, in addition to being clamped by several clamping cylinders, it is further positioned by inserting two positioning rods into the workpiece, which has good positioning effect. The three clamping cylinders are distributed in a triangular shape, and the two positioning rods are oppositely arranged, which can make the workpiece more balanced and stable in clamping.

[0023] 4. The air-tight detection hole provided on the supporting block can detect the air tightness of the clamping part of the workpiece through the air tightness detection mechanism of the machine tool, to judge whether the workpiece is clamped in place, and to ensure the accuracy of the workpiece clamping.

[0024] 5. When the supporting plate is lifted, it is guided by the guide rod, which can ensure that the workpiece is accurately placed between the clamping cylinders, so that the workpiece is accurately in contact with the supporting block and the clamping cylinder, improving the clamping accuracy. The anti-disengagement block provided on the top of the supporting plate is connected with the guide rod, which can make the guide rod move with the supporting plate, avoiding the disengagement of the guide rod and the supporting plate.

[0025] 6、The scheme adopts a quick-change bottom plate connected with the machine tool rotating center, and the clamp is rotated by the machine tool rotating center to realize the processing switching between the cylinder body joint surface of the workpiece and the bearing bush hole. Specifically, after the bearing bush hole processing is completed, the clamp only needs to be rotated by 90 degrees to perform subsequent processing on the cylinder body joint surface and the cylinder hole, without the need to re-clamp the workpiece, thereby significantly improving the processing efficiency. In addition, the clamp is horizontally rotated by the machine tool rotating center to switch the processing position, which ensures that the cylinder body joint surface and the bearing bush hole are on the same horizontal line, meets the strict processing requirements, saves the traditional horizontal position adjusting step, and further improves the processing convenience and precision. In order to enhance the universality of the scheme, the clamp body can be replaced as a whole in actual application to realize the quick conversion of different workpieces. This quick-change design not only simplifies the clamp replacement process, but also reduces the non-processing time, thereby improving the overall efficiency and flexibility of the production line. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the workpiece in the embodiment of the utility model.

[0027] Figure 2 It is a schematic view of clamping the workpiece in the embodiment of the utility model.

[0028] Figure 3 It is a structure schematic view of the embodiment of the utility model. DETAILED DESCRIPTION

[0029] The following will be further described in detail through specific embodiments:

[0030] The reference signs in the drawings of the specification include: clamp body 1, bottom plate 11, main plate 12, supporting plate 13, quick-change bottom plate 2, connecting pin 21, lifting ring 22, clamping part 3, supporting seat 31, supporting block 32, clamping cylinder 33, air-tightness detection hole 34, positioning seat 4, positioning rod 41, lifting driving part 5, guide mechanism 6, guide rod 61, anti-dropping block 62, positioning pin 71, limiting block 72, equal-height block 73, cylinder body joint surface 8, cylinder hole 81, bearing bush hole 82, cover joint surface 83, box joint surface 84, upper box body 85, lower box body 86, rib plate 9.

[0031] Embodiment:

[0032] As Figure 2As shown in the figure, the crankcase body clamping fixture comprises a clamping body 1, the clamping body 1 comprises a bottom plate 11, an inclined main plate 12 and a supporting plate 13 parallel to the main plate 12. The bottom plate 11 is detachably connected with a quick-change bottom plate 2 through a connecting pin 21 at the bottom, and the quick-change bottom plate 2 is connected with the rotating center of the machine tool. Four corners of the top of the bottom plate 11 are fixed with lifting rings 22 through bolts or screws, which facilitates hoisting the clamping body 1. The main plate 12 is bolted on the bottom plate 11 through two vertical rib plates 9, and the two rib plates 9 are connected with the main plate 12 and the bottom plate 11 through screws and positioning pins respectively. The inclination angle of the main plate 12 is 30 degrees.

[0033] In combination Figure 3 As shown in the figure, the main plate 12 is provided with a plurality of clamping pieces 3, and the number of clamping pieces 3 in the embodiment is three and the three clamping pieces 3 are distributed in a triangular shape. The clamping piece 3 comprises a supporting seat 31, the supporting seat 31 is bolted on the main plate 12, and the supporting seat 31 is integrally formed with a supporting block 32, one side of the supporting block 32 is bolted with a clamping cylinder 33, the supporting block 32 is used to support below the edge of the workpiece to cooperate with the clamping cylinder 33 to clamp the workpiece, and the clamping cylinder 33 in the embodiment adopts a lever type oil cylinder. A gas tightness detection hole 34 is opened on the supporting block 32, and the gas tightness detection hole 34 is communicated with the gas tightness detection mechanism of the machine tool. A positioning seat 4 is bolted between the two clamping cylinders 33, the positioning seat 4 is integrally formed with a positioning rod 41, and the supporting seat 31 where the other clamping cylinder 33 is located is also integrally formed with a positioning rod 41. The two positioning rods 41 are respectively arranged on the upper and lower sides of the main plate 12, that is, the two positioning rods 41 are oppositely arranged.

[0034] The supporting plate 13 is arranged between the plurality of clamping pieces 3 and can be lifted in the direction perpendicular to the main plate 12. The main plate 12 is provided with a lifting driving piece 5 for driving the supporting plate 13 to lift, and the lifting driving piece 5 in the embodiment adopts an oil cylinder. The supporting plate 13 is connected with a guide mechanism 6 between the main plate 12, and the supporting plate 13 is further provided with a positioning mechanism. The guide mechanism 6 comprises a guide rod 61, the guide rod 61 is vertically connected on the supporting plate 13, the surface of the supporting plate 13 is bolted with an anti-dropping block 62, the anti-dropping block 62 is bolted and connected with the guide rod 61, the main plate 12 is provided with a guide hole, and the guide rod 61 is slidingly connected in the guide hole. The positioning mechanism comprises a positioning pin 71, four equal-height blocks 73 and four limiting blocks 72. In the embodiment, the positioning pin 71 is two, the equal-height block 73 is four, and the limiting block 72 is four. The limiting block 72 is used to be inserted into the inner contour of the workpiece to limit the workpiece, and the height difference between the limiting block 72 and the equal-height block 73 is 40-50mm, and the preferred value in the embodiment is 43mm.

[0035] In actual use, the lifting driving member 5 drives the supporting plate 13 to rise to be higher than the clamping cylinders 33, so as to avoid the interference of the clamping cylinders 33 with the workpiece. After the supporting plate 13 is raised to the position, the workpiece is placed on the supporting plate 13, the cylinder body joint surface 8 of the workpiece faces the machining tool, the cover joint surface 83 of the workpiece is located on the supporting plate 13, the cover joint surface 83 is leveled by the equal-height blocks 73 on the supporting plate 13, the positioning pin 71 is inserted into the positioning hole on the cover joint surface 83, and the limiting block 72 is inserted into the inner contour on the cover joint surface 83 to limit the workpiece, so that the workpiece is preliminarily positioned on the supporting plate 13. The limiting block 72 and the positioning pin 71 can position the workpiece, prevent the workpiece from sliding and falling, and the height difference between the limiting block 72 and the equal-height block 73 in the embodiment is 43mm, which can achieve good limiting effect.

[0036] After the workpiece is preliminarily positioned, the lifting driving member 5 drives the supporting plate 13 to descend, and after the stroke of the lifting driving member 5 is completed, a 5mm gap (reserved according to the stroke of the lifting driving member 5) is ensured between the supporting plate 13 and the main plate 12, so as to prevent the supporting plate 13 and the main plate 12 from being tightly attached and prevent the pulling force of the lifting driving member 5 from being transmitted to the main plate 12 through the supporting plate 13. In the descending process, the guide rod 61 guides the supporting plate 13, so as to ensure that the supporting plate 13 and the workpiece accurately descend to between the three clamping cylinders 33, and avoid the workpiece from colliding with the clamping cylinders 33 to cause damage to the paint surface. After the supporting plate 13 and the workpiece are lowered to the position, the workpiece falls on the supporting blocks 32 on both sides, the positioning rods 41 are inserted into the positioning holes on both sides of the workpiece, and the clamping cylinders 33 are started to clamp the workpiece, so that the clamping of the workpiece is completed.

[0037] Since the main plate 12 and the supporting plate 13 are arranged in an inclined manner, after the workpiece is positioned, the cylinder body joint surface 8 thereof is in a vertical state and perpendicular to the machining tool, so as to facilitate the machining of the cylinder body joint surface 8 and the cylinder hole 81. In addition, after the clamping is completed, the cylinder body joint surface 8 and the bearing bush hole 82 of the workpiece are on the same horizontal plane, the bearing bush hole 82 can be switched to the machining tool by rotating the center of the machine tool by 90 degrees, the bearing bush hole 82 can be machined, and the workpiece does not need to be clamped again, so that the machining efficiency is improved.

[0038] The above is only an embodiment of the present application, and the well-known specific technical solutions and / or common knowledge in the scheme are not described in detail. It should be noted that, for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be regarded as the protection scope of the present application, and these will not affect the effect and practicability of the present application. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A fixture for block joining of a crankcase, characterized by: The clamp body comprises an inclined main plate and a parallel supporting plate, a plurality of clamping pieces are arranged on the main plate, the supporting plate is arranged between the plurality of clamping pieces and can be lifted in a direction perpendicular to the main plate, a lifting driving piece for driving the supporting plate to lift is arranged on the main plate, a guide mechanism is connected between the supporting plate and the main plate, and a positioning mechanism is arranged on the supporting plate.

2. The crankcase body joining clamp according to claim 1, characterized by: The clamping piece comprises a supporting seat, a clamping cylinder and a supporting block are arranged on the supporting seat, and the supporting block is used for supporting below the edge of the workpiece to cooperate with the clamping cylinder to clamp the workpiece.

3. The crankcase body closure j ointing fixture of claim 2, wherein: A positioning seat is further arranged on the main plate, a positioning rod is arranged on the positioning seat, and a positioning rod is also arranged on the supporting seat.

4. The crankcase body closure j ointing fixture of claim 3 wherein: Airtightness detection holes are opened on the supporting blocks and are in communication with an airtightness detection mechanism of the machine tool.

5. The crankcase body closure j ointing fixture of claim 4 wherein: The supporting seat is in a triangular shape.

6. The crankcase body closure j ointing fixture of claim 5 wherein: The positioning rod on the positioning seat and the positioning rod on the supporting seat are oppositely arranged.

7. The crankcase body closure j ointing fixture of claim 1 wherein: The positioning mechanism comprises a positioning pin, an equal-height block and a limiting block, the limiting block is used for being inserted into the inner contour of the workpiece to limit the workpiece, and the height difference between the limiting block and the equal-height block is 40-50mm.

8. The crankcase body closure j ointing fixture of claim 1 wherein: The guide mechanism comprises a guide rod, the guide rod is vertically arranged on the supporting plate, a anti-falling block is fixed on the surface of the supporting plate, the anti-falling block is fixedly connected with the guide rod, a guide hole is arranged on the main plate, and the guide rod is slidingly connected in the guide hole.

9. The crankcase body closure j ointing fixture of claim 1 wherein: The clamp body is detachably connected with a quick-change bottom plate connected with the rotating center of the machine tool, and a lifting ring is fixed on the clamp body.

10. The crankcase body closure j ointing fixture of claim 1 wherein: The inclination angle of the main plate is 30 degrees.

Images