Tool for boring oil cylinder head

Abstract

The utility model discloses a tool for boring an oil cylinder head, which is used for clamping two groups of cylinder heads to be processed at one time, and comprises a bottom plate fixedly arranged on a working table, a plurality of boring holes and a plurality of boring holes, the positioning assembly is fixedly connected with the working face of the bottom plate, and the two opposite sides of the positioning assembly position the two sets of cylinder heads correspondingly; the pull rod assembly comprises a pull rod, a rear pressing plate and a front pressing plate, one end of the pull rod is fixedly connected with the rear pressing plate in an inserted mode, the other end of the pull rod adjustably penetrates through the front pressing plate, the part, penetrating out of the front pressing plate, of the pull rod is sleeved with a locking nut in a threaded fit mode, and the pull rod movably penetrates through the positioning assembly in the axial direction. And the two sets of workpiece pressing plates are fixedly connected with the rear pressing plate and the front pressing plate correspondingly, and the two sets of cylinder heads abut against the two opposite sides of the positioning assembly in the axial direction through the two sets of workpiece pressing plates in the locking state of the locking nuts correspondingly.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a tool used for boring holes of a cylinder head. Background Art

[0002] In order to be used together with other parts, hydraulic cylinders often have earring holes processed on the cylinder head, and the dimensional accuracy of the earring holes is required to be high. In order to meet the accuracy requirements, the cylinder head is generally placed on the machining center and clamped with a bench vise so that the earring holes that meet the requirements can be processed on the cylinder head.

[0003] There are many devices for processing ear holes in the prior art, such as the utility model patent with announcement number CN207479652U, which discloses a universal joint ear hole processing tooling, which clamps one workpiece at a time for drilling operation.

[0004] However, the defects of the prior art are very obvious, specifically: the bench vise can only clamp one cylinder head to be drilled at a time, that is, only one earring hole of the cylinder head can be processed after one clamping, resulting in generally low utilization rate of the machining center and very low machining efficiency. Utility Model Content

[0005] The utility model aims to provide a tooling for boring holes in oil cylinder heads, which can clamp multiple cylinder heads at one time, and can process earring holes of multiple cylinder heads after one clamping, thereby improving processing efficiency.

[0006] The purpose of the utility model is achieved as follows: a tool for boring a cylinder head, which is used to clamp two groups of cylinder heads to be processed at one time, and comprises:

[0007] A base plate, which is fixedly mounted on the workbench;

[0008] A positioning assembly, which is fixedly connected to the working surface of the bottom plate, and two opposite sides of the positioning assembly respectively position two groups of cylinder heads;

[0009] A pull rod assembly, comprising a pull rod, a rear pressure plate and a front pressure plate, wherein one end of the pull rod is fixedly plugged into the rear pressure plate, and the other end thereof is adjustable to penetrate the front pressure plate, and a locking nut is threadedly mounted on the portion of the pull rod that passes through the front pressure plate, and the pull rod axially movably penetrates the positioning assembly;

[0010] Two groups of workpiece pressure plates are respectively fixedly connected to the rear pressure plate and the front pressure plate. When the locking nut is locked, the two groups of workpiece pressure plates respectively press the two groups of cylinder heads axially against the two opposite sides of the positioning assembly.

[0011] Furthermore, the pull rod sleeve is equipped with a pair of springs, and the pull rod sleeve is equipped with a first nut and a second nut, the first nut and the second nut are located at two opposite sides of the positioning assembly, and a pair of spring sleeves are equipped with a pull rod and are located at two opposite sides of the positioning assembly; the two ends of one of the springs respectively abut the first nut and one side of the positioning assembly, and the other spring is on the other side of the positioning assembly, and its two ends respectively abut the second nut and the front pressure plate, and the pull rod axially movably passes through the front pressure plate.

[0012] Furthermore, the positioning assembly includes a positioning plate fixedly connected to the working surface of the base plate, the positioning plate is provided with a plurality of through holes, each through hole is fixedly inserted with a circular sleeve-shaped positioning sleeve, each positioning sleeve corresponds to two cylinder heads and its two axial ends respectively abut against the circular parts of the two cylinder heads.

[0013] Furthermore, two groups of pads corresponding to the two groups of cylinder heads are fixed on the working surface of the bottom plate, the pads support and position the ear plate parts of the cylinder heads, and the workpiece pressure plate is located above the pads.

[0014] Furthermore, the workpiece pressing plate is configured as a V-shaped plate structure having two open arms, the two arms respectively abutting against the ear plate portions of the two cylinder heads and respectively facing the two positioning sleeves along the axial direction.

[0015] Furthermore, the positioning sleeve is detachably plugged into the corresponding through hole of the positioning plate.

[0016] Furthermore, the positioning ends of the two arms of the workpiece pressing plate coincide with the ear plate parts of the cylinder head.

[0017] Furthermore, the two groups of workpiece pressing plates are detachably fixedly connected to the rear pressing plate and the front pressing plate respectively.

[0018] The beneficial effects of the utility model are:

[0019] 1. After one clamping, multiple earring holes of cylinder heads can be processed, which can achieve the goal of multi-piece processing and improve the utilization rate of the machining center;

[0020] 2. By tightening the locking nut, all cylinder heads can be tightened with just one tightening, which reduces the repetitive labor intensity of front-line employees and improves work efficiency;

[0021] 3. Due to the provision of a spring, when the locking nut is loosened, the elastic force generated by the compression of the spring automatically pops open the pull rod assembly and the front pressure plate, so that the workpiece pressure plate automatically moves away from the cylinder head, so that the processed cylinder head can be taken out in time, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the general assembly drawing of the utility model.

[0023] Explanation of the reference numerals: 1-base plate; 2-positioning plate; 3-positioning sleeve; 4-workpiece pressure plate; 5-front pressure plate; 6-spring; 7-pull rod assembly; 7a-rear pressure plate; 7b-pull rod; 8-locking nut; 9-shim; 10-cylinder head. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown, a tool for boring holes in cylinder heads is used to clamp two groups of cylinder heads 10 to be processed at one time, in order to process earring holes that meet the requirements on the ear plate part of the cylinder head 10, and the number of each group of cylinder heads 10 is four.

[0026] The tooling includes:

[0027] The base plate 1 is fixed on the workbench of the machining center by bolts and cylindrical pins;

[0028] A positioning assembly, which is fixedly connected to the working surface of the bottom plate 1, and two opposite sides of the positioning assembly respectively position two groups of cylinder heads 10;

[0029] The pull rod assembly 7 includes a pull rod 7b, a rear pressure plate 7a and a front pressure plate 5. One end of the pull rod 7b is fixedly plugged into the rear pressure plate 7a, and the other end thereof movably penetrates the front pressure plate 5. A locking nut 8 is threadedly mounted on the portion of the pull rod 7b that passes through the front pressure plate 5. The pull rod 7b axially movably penetrates the positioning assembly.

[0030] Two groups of workpiece pressing plates 4 are respectively detachably fixedly connected to the rear pressing plate 7a and the front pressing plate 5. When the locking nuts 8 are locked, the two groups of workpiece pressing plates 4 respectively press the two groups of cylinder heads 10 axially against the two opposite sides of the positioning assembly.

[0031] Among them, the pull rod 7b is equipped with a pair of springs 6, and the pull rod 7b is equipped with a first nut and a second nut. The first nut and the second nut are located at two opposite sides of the positioning component. A pair of springs 6 are equipped with the pull rod 7b and are located at two opposite sides of the positioning component; the two ends of one spring 6 respectively abut the first nut and one side of the positioning component, and the other spring 6 is on the other side of the positioning component, and its two ends respectively abut the second nut and the front pressure plate 5, and the pull rod 7b axially moves through the front pressure plate 5.

[0032] like Figure 1As shown, the number of each group of workpiece pressing plates 4 is two, and they are located on both sides of the pull rod 7b. Each workpiece pressing plate 4 corresponds to two cylinder heads 10 and presses the two cylinder heads 10 against the positioning assembly.

[0033] As a preferred embodiment, in order to better position the cylinder head 10, the positioning assembly includes a positioning plate 2 fixedly connected to the working surface of the base plate 1, the positioning plate 2 is provided with a plurality of through holes, each through hole is fixedly inserted with a circular sleeve-shaped positioning sleeve 3, each positioning sleeve 3 corresponds to two cylinder heads 10 and its two axial ends respectively abut against the circular parts of the two cylinder heads 10, and the two axial ends of the positioning sleeve 3 are both set as positioning stoppers so as to position against the circular part of the cylinder head 10.

[0034] As a preferred embodiment, in order to facilitate the positioning of the ear plate part of the cylinder head 10, two groups of pads 9 corresponding to the two groups of cylinder heads 10 are fixed on the working surface of the base plate 1, and the pads 9 support and position the ear plate part of the cylinder head 10, and the workpiece pressure plate 4 is located above the pads 9.

[0035] As a preferred embodiment, the workpiece pressing plate 4 is configured as a V-shaped plate structure having two open arms, the two arms respectively abutting against the ear plate portions of the two cylinder heads 10 and respectively facing the two positioning sleeves 3 along the axial direction.

[0036] As a preferred embodiment, the positioning sleeve 3 is detachably plugged into the corresponding through hole of the positioning plate 2 .

[0037] As a preferred embodiment, the positioning ends of the two arms of the workpiece pressure plate 4 coincide with the ear plate portion of the cylinder head 10, and the positioning ends of the two arms of the workpiece pressure plate 4 can be provided with arc-shaped recesses so as to position against the arc edge of the ear plate portion of the cylinder head 10 to achieve a better positioning effect.

[0038] The operation steps of this embodiment are as follows:

[0039] Step 1: Check whether there are iron filings at the locating stop of the shaft end of the locating sleeve 3, and blow away the iron filings on the surface with an air gun.

[0040] Step 2: Install the welding groove end of the circular part of the cylinder head 10 onto the axial end positioning stop of the positioning sleeve 3, that is, make the circular part of the cylinder head 10 axially support the positioning sleeve 3, and place the ear plate part of the cylinder head 10 flat on the pad 9.

[0041] Step 3: Tighten the locking nut 8 so that the V-shaped workpiece pressure plate 4 locks the cylinder head 10. At the same time, the two springs 6 are in a compressed state, which facilitates the tool to perform boring operations on the clamped multiple cylinder heads 10. Figure 1 shown.

[0042] After the processing is completed, the locking nut 8 is loosened, and the elastic force generated by the compression of the spring 6 automatically pops open the pull rod assembly 7 and the front pressure plate 5, so that the workpiece pressure plate 4 automatically loosens the cylinder head 10, so that the processed multiple cylinder heads 10 can be taken out in time.

[0043] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tool for boring a cylinder head, characterized in that: It is used for clamping two groups of cylinder heads (10) to be processed at one time, and comprises: A base plate (1) fixedly mounted on a workbench; A positioning assembly fixedly connected to the working surface of the base plate (1), wherein two opposite sides of the positioning assembly respectively position two groups of cylinder heads (10); A pull rod assembly (7), comprising a pull rod (7b), a rear pressure plate (7a) and a front pressure plate (5); one end of the pull rod (7b) is fixedly plugged into the rear pressure plate (7a), and the other end thereof can be adjusted to pass through the front pressure plate (5); a locking nut (8) is threadedly mounted on the portion of the pull rod (7b) that passes through the front pressure plate (5); the pull rod (7b) axially movably passes through the positioning assembly; Two groups of workpiece pressure plates (4) are respectively fixedly connected to the rear pressure plate (7a) and the front pressure plate (5); when the locking nut (8) is locked, the two groups of workpiece pressure plates (4) respectively press the two groups of cylinder heads (10) axially against the two opposite sides of the positioning assembly.

2. The tooling for boring a hole in a cylinder head according to claim 1, characterized in that: The pull rod (7b) sleeve is equipped with a pair of springs (6), and the pull rod (7b) sleeve is equipped with a first nut and a second nut, the first nut and the second nut are respectively located at two opposite sides of the positioning component, and a pair of springs (6) are sleeved with the pull rod (7b) and are respectively located at two opposite sides of the positioning component; the two ends of one spring (6) respectively abut against the first nut and one side of the positioning component, and the other spring (6) is on the other side of the positioning component, and its two ends respectively abut against the second nut and the front pressure plate (5), and the pull rod (7b) axially movably passes through the front pressure plate (5).

3. The tooling for boring a hole in a cylinder head according to claim 1, characterized in that: The positioning assembly comprises a positioning plate (2) fixedly connected to the working surface of the base plate (1), the positioning plate (2) being provided with a plurality of through holes, each through hole being fixedly plugged with a circular sleeve-shaped positioning sleeve (3), each positioning sleeve (3) corresponding to two cylinder heads (10) and having two axial ends respectively abutting against the circular parts of the two cylinder heads (10).

4. The tooling for boring a hole in a cylinder head according to claim 1, characterized in that: Two groups of pads (9) corresponding to two groups of cylinder heads (10) are fixed on the working surface of the base plate (1), and the pads (9) support and position the ear plate parts of the cylinder heads (10). The workpiece pressure plate (4) is located above the pads (9).

5. The tooling for boring a hole in a cylinder head according to claim 3, characterized in that: The workpiece pressing plate (4) is configured as a V-shaped plate structure having two open arms, the two arms respectively abutting against the ear plate parts of the two cylinder heads (10) and respectively facing the two positioning sleeves (3) along the axial direction.

6. The tooling for boring a cylinder head according to claim 3, characterized in that: The positioning sleeve (3) is detachably plugged into the corresponding through hole of the positioning plate (2).

7. The tooling for boring a hole in a cylinder head according to claim 5, characterized in that: The positioning ends of the two arm portions of the workpiece pressing plate (4) coincide with the ear plate portions of the cylinder head (10).

8. A tool for boring a hole in a cylinder head according to claim 5 or 7, characterized in that: The two groups of workpiece pressing plates (4) are respectively detachably fixedly connected to the rear pressing plate (7a) and the front pressing plate (5).

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