Positioning mechanism for machining auxiliary holes in bottom surface of cylinder body

Abstract

The utility model discloses a positioning mechanism for processing a process hole on the bottom surface of a cylinder body, which comprises a main body unit, the main body unit comprises a clamp bottom plate, the clamp bottom plate is fixedly arranged on a vertical processing center workbench, the top of the clamp bottom plate is fixedly provided with two pressing components, the two pressing components are symmetrically arranged, and the two pressing components are fixedly arranged on the clamp bottom plate. Thick guide pieces are fixedly mounted on the pressing components, and the two thick guide pieces are arranged corresponding to the pressing components; and the positioning unit comprises a Y-direction clamping component and an X-direction clamping component, and the Y-direction clamping component and the X-direction clamping component are both fixedly installed on the top of the clamp bottom plate. According to the design, the defects in the prior art are overcome, the device is mainly used for machining auxiliary holes in the bottom face of a cylinder body, blank cylinder holes are accurately positioned in the mode, compared with an original positioning mechanism, errors caused by the blank cylinder center distance can be effectively eliminated, it is guaranteed that the wall thickness of the cylinder holes is uniform and perpendicular, and meanwhile it is guaranteed that a datum hole is accurately machined and the follow-up machining precision is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a positioning mechanism for processing a process hole on the bottom surface of a cylinder body. Background Art

[0002] The first step in cylinder body processing is to accurately machine the positioning reference, that is, to fine mill the bottom surface and process the process holes. Currently, the bottom surface process holes are processed by tightening the one- and four-cylinder holes (three-point tightening limit for one cylinder and two-point tightening to prevent rotation for four cylinders). The height of the positioning cylinder hole is about 10mm, and the rough crankshaft hole is pressed.

[0003] The existing positioning method is prone to the following situations during processing:

[0004] 1. If there is a deviation in the center distance of the first and fourth blank cylinder holes, the bottom locating pin will be biased towards the first cylinder after processing.

[0005] 2. If the positioning height is low, the vertical direction of the cylinder hole will deviate, resulting in the cylinder hole processed by the process hole positioning being not vertical and the wall thickness being uneven, which affects the quality of the engine body and can even lead to the direct scrapping of the engine body in severe cases. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] In view of the problems existing in the above-mentioned prior art, the present utility model is proposed.

[0008] Therefore, the purpose of the utility model is to provide a positioning mechanism for processing the process holes on the bottom surface of the cylinder block, in order to solve the problem that "if there is a deviation in the center distance of the first and fourth blank cylinder holes, the bottom surface locating pins will be biased towards one cylinder after processing, the positioning height will be low, and the vertical direction of the cylinder hole will deviate, resulting in the cylinder hole processed by the process hole positioning being not vertical and the wall thickness being uneven, affecting the quality of the engine body, and in serious cases directly causing the engine body to be scrapped."

[0009] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0010] A positioning mechanism for machining a process hole on a cylinder bottom surface, comprising:

[0011] A main unit, the main unit comprising a fixture base plate, the fixture base plate is fixedly mounted on a workbench of a vertical machining center, a clamping member is fixedly mounted on the top of the fixture base plate, two of the clamping members are symmetrically arranged, a coarse guide is fixedly mounted on the clamping member, and two of the coarse guides are arranged corresponding to the clamping members;

[0012] The positioning unit comprises a Y-direction clamping member and an X-direction clamping member, and the Y-direction clamping member and the X-direction clamping member are both fixedly installed on the top of the fixture bottom plate.

[0013] As a preferred solution of the positioning mechanism for processing the process hole on the bottom surface of the cylinder body described in the utility model, a support pad is fixedly installed on the top of the clamp bottom plate, two support pads are arranged on the left side of the top of the clamp bottom plate, and one support pad is arranged on the right side of the top of the clamp bottom plate.

[0014] As a preferred solution of the positioning mechanism for processing the process hole on the bottom surface of the cylinder body described in the utility model, a floating support is fixedly installed on the top of the clamp bottom plate, and two floating supports are provided, one of the floating supports is located on the front side of the right support pad, and the other floating support is located on the rear side of the right support pad.

[0015] As a preferred solution of the positioning mechanism for processing the process hole on the bottom surface of the cylinder body described in the utility model, a throttle valve, a sequence valve and a manual reversing valve are fixedly installed on the top of the fixture bottom plate, and the manual reversing valve is used to control the throttle valve and the sequence valve.

[0016] As a preferred solution of the positioning mechanism for processing the process hole on the bottom surface of the cylinder body described in the utility model, two Y-direction clamping members are symmetrically arranged, and two X-direction clamping members are symmetrically arranged, the two X-direction clamping members are located between the two Y-direction clamping members, the Y-direction clamping member is used to position cylinder No. 1 and cylinder No. 4, and the X-direction clamping member is used to position cylinder No. 2 and cylinder No. 3.

[0017] As a preferred solution of the positioning mechanism for processing the process hole on the bottom surface of the cylinder body described in the utility model, a No. 1 rising pin is provided on the front side of the Y-direction clamping member, and a No. 2 rising pin is provided on the side close to each other of the two X-direction clamping members.

[0018] Beneficial effects of the utility model:

[0019] The utility model can reduce the deviation in the vertical direction by tightening and positioning the inner sides of the first and fourth cylinder holes in the Y direction, and can correct the engine body to be bisected in the center by tightening and positioning the inner sides of the second and third cylinder holes in the X direction, and the process holes are processed in the center, which is symmetrical and has good stability. The subsequent processing of other hole systems based on this reference is relatively stable. This design solves the shortcomings of the existing technology and can be mainly used to process the process holes on the bottom surface of the cylinder body. This method can accurately position the blank cylinder hole. Compared with the original positioning mechanism, it can effectively eliminate the error caused by the blank cylinder center distance, ensure that the cylinder hole wall thickness is uniform and vertical, and at the same time ensure that the reference hole is accurately processed and the subsequent processing accuracy is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a top view of the overall structure of the utility model;

[0023] Figure 3 For this utility model Figure 1 A magnified view of the structure at A;

[0024] Figure 4 This is the clamping diagram of the cylinder body processing technology hole of the utility model.

[0025] In the figure: 100, main unit; 101, fixture base plate; 102, clamping member; 103, supporting pad; 104, floating support; 105, throttle valve; 106, sequence valve; 107, coarse guide; 108, manual reversing valve; 200, positioning unit; 201, Y-direction clamping member; 202, X-direction clamping member; 203, No. 1 rising pin; 204, No. 2 rising pin. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Reference Figure 1-4 The utility model provides a positioning mechanism for processing a process hole on the bottom surface of a cylinder body, comprising:

[0031] The main unit 100 includes a fixture base plate 101, which is fixedly mounted on a workbench of a vertical machining center. A clamping member 102 is fixedly mounted on the top of the fixture base plate 101. Two clamping members 102 are symmetrically arranged. A coarse guide member 107 is fixedly mounted on the clamping member 102. Two coarse guide members 107 are arranged corresponding to the clamping members 102.

[0032] The positioning unit 200 includes a Y-direction clamping member 201 and an X-direction clamping member 202 . The Y-direction clamping member 201 and the X-direction clamping member 202 are both fixedly mounted on the top of the fixture bottom plate 101 .

[0033] Furthermore, a support block 103 is fixedly installed on the top of the clamp base plate 101, two support blocks 103 are arranged on the left side of the top of the clamp base plate 101, and one support block 103 is arranged on the right side of the top of the clamp base plate 101. A floating support 104 is fixedly installed on the top of the clamp base plate 101, and two floating supports 104 are arranged, one floating support 104 is located on the front side of the right support block 103, and the other floating support 104 is located on the rear side of the right support block 103. The support block 103 can support and protect the cylinder head surface of the engine body, and the floating support 104 can support the cylinder head surface of the engine body and lift it upward.

[0034] Furthermore, a throttle valve 105 , a sequence valve 106 and a manual reversing valve 108 are fixedly installed on the top of the fixture bottom plate 101 . The manual reversing valve 108 is used to control the throttle valve 105 and the sequence valve 106 .

[0035] Furthermore, two Y-direction clamping members 201 are symmetrically arranged, and two X-direction clamping members 202 are symmetrically arranged. The two X-direction clamping members 202 are located between the two Y-direction clamping members 201. The Y-direction clamping member 201 is used to position cylinder No. 1 and cylinder No. 4, and the X-direction clamping member 202 is used to position cylinder No. 2 and cylinder No. 3. A No. 1 rising pin 203 is arranged on the front side of the Y-direction clamping member 201, and a No. 2 rising pin 204 is arranged on the side close to each other of the two X-direction clamping members 202. The No. 1 rising pin 203 is used to tighten and position cylinder No. 1 and cylinder No. 4, and the No. 2 rising pin 204 is used to tighten and position cylinder No. 2 and cylinder No. 3.

[0036] During use, the staff fixes the fixture base plate 101 on the workbench of the vertical machining center and calibrates it, then hoists the engine body so that the bottom surface of the engine body faces upward and the cylinder head faces downward, and hoists the engine body so that the end surfaces on both sides are against the coarse guide 107 to complete the pre-positioning, and then drops the cylinder head surface of the engine body to the top of the supporting pad 103, and the cylinder holes of the No. 1 cylinder and the No. 4 cylinder of the engine body fall into position through the coarse guide structure on the top of the Y-direction clamping member 201, and the cylinder holes of the No. 2 cylinder and the No. 3 cylinder of the engine body fall into the X-direction clamping member 202 for positioning.

[0037] The staff opens the manual reversing valve 108. Under the control of the manual reversing valve 108, the throttle valve 105 and the sequence valve 106 act on each part to operate in sequence: first, the No. 2 rising pin 204 on the X-direction clamping member 202 extends outward, and the two No. 2 rising pins 204 tighten the inner sides of the cylinder holes of the No. 2 cylinder and the No. 3 cylinder respectively, completing the X-direction positioning, so that the engine body is centered and divided in half. Then, the No. 1 rising pin 203 on the Y-direction clamping member 201 extends outward, and the two No. 1 rising pins 203 tighten the inner sides of the cylinder holes of the No. 1 cylinder and the No. 4 cylinder respectively, completing the Y-direction positioning. Then the clamping member 102 works, and the two clamping members 102 respectively press the blank crankshaft holes at both ends of the engine body. Finally, the floating support 104 pushes up to support the cylinder head surface of the engine body to prevent it from being suspended. At this time, the clamping of the engine body is completed.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A positioning mechanism for machining a process hole on the bottom surface of a cylinder body, characterized in that: include: A main body unit (100), the main body unit (100) comprising a fixture base plate (101), the fixture base plate (101) being fixedly mounted on a workbench of a vertical machining center, a clamping member (102) being fixedly mounted on the top of the fixture base plate (101), two of the clamping members (102) being symmetrically arranged, a coarse guide member (107) being fixedly mounted on the clamping member (102), and two of the coarse guide members (107) being arranged corresponding to the clamping members (102); A positioning unit (200), the positioning unit (200) comprising a Y-direction clamping component (201) and an X-direction clamping component (202), the Y-direction clamping component (201) and the X-direction clamping component (202) both being fixedly mounted on the top of a fixture bottom plate (101).

2. A positioning mechanism for machining a process hole on the bottom surface of a cylinder body according to claim 1, characterized in that: A support pad (103) is fixedly mounted on the top of the clamp bottom plate (101), two support pads (103) are arranged on the left side of the top of the clamp bottom plate (101), and one support pad (103) is arranged on the right side of the top of the clamp bottom plate (101).

3. A positioning mechanism for machining a process hole on the bottom surface of a cylinder body according to claim 2, characterized in that: A floating support (104) is fixedly installed on the top of the clamp bottom plate (101), and two floating supports (104) are provided, one of the floating supports (104) is located on the front side of the right support pad (103), and the other floating support (104) is located on the rear side of the right support pad (103).

4. A positioning mechanism for machining a process hole on the bottom surface of a cylinder body according to claim 1, characterized in that: A throttle valve (105), a sequence valve (106) and a manual reversing valve (108) are fixedly mounted on the top of the fixture bottom plate (101), and the manual reversing valve (108) is used to control the throttle valve (105) and the sequence valve (106).

5. The positioning mechanism for machining a process hole on the bottom surface of a cylinder body according to claim 1, characterized in that: Two Y-direction clamping members (201) are symmetrically arranged, and two X-direction clamping members (202) are symmetrically arranged. The two X-direction clamping members (202) are located between the two Y-direction clamping members (201). The Y-direction clamping members (201) are used to position cylinder No. 1 and cylinder No. 4, and the X-direction clamping members (202) are used to position cylinder No. 2 and cylinder No.

3.

6. A positioning mechanism for machining a process hole on the bottom surface of a cylinder body according to claim 5, characterized in that: A first rising pin (203) is arranged at the front side of the Y-direction clamping member (201), and a second rising pin (204) is arranged at one side of the two X-direction clamping members (202) close to each other.

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