Scribing-free cylinder cover planer type milling machine clamp

Abstract

The utility model relates to the technical field of diesel engine cylinder cover clamps, in particular to a lineation-free cylinder cover planer type milling machine clamp. Comprising a base (1) detachably and fixedly arranged on a planer type milling machine, and an annular positioning disc (3) used for positioning the cylinder cover is arranged on the base (1); four equal-height positioning pads (2) are arranged on the base (1) and at equal parts of the outer edge of the periphery of the annular positioning disc (3); the base (1) is further provided with a clamping mechanism (10) used for being matched with a sand cleaning opening of the air cylinder cover so as to clamp the air cylinder cover. Mounting notches are symmetrically formed in two side edges of the base (1); the top of the side wall of the annular positioning disc (3) is provided with a groove-shaped structure. The front end face of the base (1) is a finish-machined datum plane used for determining the clamping direction for alignment, large-plane short pin positioning is adopted, the clamp is accurate in positioning and reliable in clamping, a professional scribing platform and a specific scribing post do not need to be arranged, and product precision and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to diesel engine cylinder cover clamp technical field, concretely is a cylinder cover gantry milling machine clamp of free scribing. BACKGROUND

[0002] Cylinder cover is the key part of diesel engine, and the cylinder cover, piston top and cylinder liner form combustion chamber to provide continuous kinetic energy source for diesel engine. Cylinder cover has to bear the combined action of high temperature, high pressure and chemical corrosion, and the working condition is very bad. Therefore, the top surface, bottom surface and air passage end surface of cylinder cover have high dimensional accuracy and shape accuracy requirements.

[0003] The prior art is to draw the size limit of the top surface and bottom surface of the cylinder cover once, and after rough and finish machining of the top surface and bottom surface by the numerical control vertical lathe, the size limit of the air passage hole end surface and the bottom surface stop circle center line as the reference line are drawn twice, the rotating direction is adjusted and aligned on the horizontal milling machine according to the stop circle center line, the position accuracy of the cylinder cover on the milling machine is ensured, and then the cylinder cover is pressed tightly, and the processing of the air passage hole end surface is completed according to the size limit. The method has low processing efficiency, long process cycle, and needs to set a professional scribing platform and a specific scribing post. SUMMARY

[0004] The utility model discloses a cylinder cover machining efficiency is low, long process cycle, needs to set professional scribing platform and specific scribing post and so on problem, proposes a free scribing cylinder cover gantry milling machine clamp, including detachable fixed setting on the base of gantry milling machine, be provided with annular positioning disc for cylinder cover positioning on the base, be provided with equal height positioning pad for plane positioning on the base around annular positioning disc, still be provided with the clamping mechanism for being connected with cylinder cover sand mouth on the base, thereby clamping cylinder cover,

[0005] The clamping mechanism comprises: a supporting block vertically arranged on the base, and a pressing rod connected to the supporting block; the pressing rod is provided with a through groove with an axis perpendicular to the surface of the base; the through groove is provided with a pressing rod bolt; one end of the pressing rod bolt is fixedly arranged on the base; a supporting spring is arranged between the upper surface of the base and the lower surface of the pressing rod; the supporting spring is sleeved on the pressing rod bolt, one end of the pressing rod bolt with a thread penetrates out of the through groove, and a hexagonal nut is matched on the thread; a gasket is arranged between the hexagonal nut and the upper surface of the pressing rod; one end of the pressing rod is horizontally provided with a protruding part; the protruding part is inserted into the sand mouth of the cylinder cover, and the cylinder cover is clamped by the clamping mechanism.

[0006] The four clamping mechanisms adopt a pressing rod penetrating through a pressing rod bolt; a supporting block is arranged at the rear point, so that the acting force is applied on the stress point, and the clamping is reliable; the pressing rod bolt is sleeved with a supporting spring, and after unloading the supporting pressing rod, the supporting pressing rod can be kept at the reasonable position to be processed.

[0007] The two side edges of the base are symmetrically provided with mounting notches for inserting locking bolts to fix the clamp on the worktable of the gantry milling machine.

[0008] The top of the side wall of the annular positioning disc is provided with a groove structure for avoiding assembly interference caused by too high positioning accuracy.

[0009] The front end face of the base is a precisely processed reference plane, which is used for aligning the scribing disc when determining the clamping direction before clamping and positioning the cylinder cover.

[0010] According to the above-mentioned cylinder cover gantry milling machine clamp without scribing, the four equal-height positioning pads are symmetrically arranged around the annular positioning disc, which facilitates the cleaning of the positioning surface and the accuracy of positioning.

[0011] According to the above-mentioned cylinder cover gantry milling machine clamp without scribing, the four clamping mechanisms are arranged at the corresponding positions of the sand removal ports of the cylinder cover.

[0012] According to the above-mentioned cylinder cover gantry milling machine clamp without scribing, the groove structures symmetrically distributed on the top of the side wall of the annular positioning disc are four.

[0013] According to the above-mentioned cylinder cover gantry milling machine clamp without scribing, the four mounting notches symmetrically and parallelly arranged on the two side edges of the base.

[0014] According to the above-mentioned cylinder cover gantry milling machine clamp without scribing, the pressing rod is in a strip-shaped cubic structure.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model realizes the effective connection of the base, the annular positioning disc and the positioning pad through large-plane short-pin positioning, completes the positioning of the cylinder cover on the clamp, enhances the rigidity of the process system by four positioning pads, is accurate in positioning and is high in clamping efficiency.

[0017] 2.The utility model discloses according to four stress points, designs clamping mechanism respectively, and the clamping of workpiece on clamp is completed, by the size limit of top surface and bottom surface that traditional one time scribe draws, after the bottom surface and top surface are turned by numerical control vertical lathe, the size limit of air passage mouth end surface and bottom surface stop mouth circle center line are completed by secondary scribe, and then the processing air passage mouth end surface is aligned according to stop mouth circle center line, and the milling of top surface and air passage mouth end surface is completed by gantry milling machine after being clamped and positioned on the utility model, and the processing quality and efficiency of milling are improved.

[0018] 3.The utility model discloses the one end horizontal of clamping mechanism pressure lever is provided with the convex part, the convex part inserts the sand mouth of cylinder cover, and clamps the cylinder cover through clamping mechanism, and the rigidity of process system is further strengthened, and clamping is reliable.

[0019] The use of the clamp improves the processing efficiency, shortens the process cycle, eliminates the need for a professional scribing platform and a specific scribing post, greatly reduces the production cost, and improves the positioning accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the front view of the structure schematic diagram of the utility model.

[0021] Figure 2 It is the top view of the structure schematic diagram of the utility model.

[0022] Figure 3 It is the left view of the structure schematic diagram of the utility model.

[0023] Figure 4 It is the structure schematic diagram of the clamping mechanism of the utility model.

[0024] 1: base, 2: positioning pad, 3: annular positioning disc, 4: pressure lever bolt, 5: hexagonal nut, 6: washer, 7: pressure lever, 8: supporting block, 9: supporting spring, 10: clamping mechanism. DETAILED DESCRIPTION

[0025] PREFERRED EMBODIMENT

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] As Figure 1The utility model discloses a kind of free-line cylinder head gantry milling machine clamps, including detachable fixedly arranged base 1 on gantry milling machine, the annular positioning disc 3 for cylinder head positioning is provided on the base 1;High-level positioning pad 2 is provided on the base 1, around the annular positioning disc 3 with plane positioning;The clamping mechanism 10 for being connected with cylinder head sanding mouth to clamp cylinder head is further provided on the base 1;

[0028] The clamping mechanism 10 includes: support block 8 vertically arranged on the base 1, and pressure rod 7 connectedly arranged on the support block 8;The through slot with axis vertical to the surface of base 1 is provided on the pressure rod 7;Pressure rod bolt 4 is provided in the through slot;One end of the pressure rod bolt 4 is fixedly arranged on the base 1;Support spring 9 is arranged between the upper surface of base 1 and the lower surface of pressure rod 7;The support spring 9 is sleeved on the pressure rod bolt 4, and the threaded end of the pressure rod bolt 4 passes through the through slot, the four clamping mechanisms adopt pressure rod to pass through pressure rod bolt, and support block 8 is arranged at the back point, so that the acting force is applied on the stress point, and the clamping is reliable, the support spring 9 is sleeved on the pressure rod bolt, to support the pressure rod after unloading, and the clamping force disappears, which can be kept in the reasonable position to be processed.

[0029] The installation slot is symmetrically arranged on the two side edges of the base 1, to insert locking bolt to fix the clamp on the workbench of gantry milling machine.

[0030] The groove structure is arranged on the top of the side wall of the annular positioning disc 3, to avoid assembly interference caused by positioning accuracy being too high.

[0031] The high-level positioning pad 2 is arranged in four, to facilitate the cleaning of positioning surface and the accuracy of positioning, and is symmetrically arranged around the annular positioning disc 3.

[0032] The clamping mechanism 10 is arranged at the corresponding position of cylinder head sanding mouth, and there are four.

[0033] The groove structure arranged on the top of the side wall of the annular positioning disc 3 is symmetrically distributed in four.

[0034] The installation slot of the base 1 is symmetrically and parallelly arranged on the two side edges, and there are four.

[0035] The pressure rod 7 is a strip-shaped cubic structure.

[0036] The support spring 9 is sleeved on the pressure rod bolt 4, to support the pressure rod 7 after unloading, which can be kept in the reasonable position to be processed.

[0037] The front end surface of the base 1 is a finished reference plane, which is used for aligning the scribing disc when determining the clamping direction before clamping and positioning the cylinder head on the fixture.

[0038] By the person skilled in the art, the parts in the utility model are sequentially connected, and the specific connection and operation sequence should be referred to the following working principle, and the detailed connection means is the commonly known technology in the art, and the following mainly introduces the working principle and process.

[0039] By Figures 1-4 It can be known that the cylinder head gantry milling machine fixture comprises a base 1, the center position of the base 1 is provided with an annular positioning disc 3, four positioning pads 2 are arranged along the outer edge of the annular positioning disc 3, a press rod bolt 4 is installed at each of the four stress points, and a supporting spring 9 is arranged between the press rod 7 and the supporting block 8.

[0040] In the specific implementation process, it is worth pointing out that the large plane short pin positioning is completed through the cooperation of the annular positioning disc 3 and the positioning pad 2, the clamping of the cylinder head on the fixture is realized by using the friction force generated between the connecting pieces through the press rod bolt 4 to pressurize the connecting pieces, and the installation of the fixture on the machine tool is completed by tightening the nut after the fastening bolt passes through the slot of the base 1.

[0041] The center position of the base 1 is provided with an annular positioning disc 3, and the annular positioning disc 3 is slotted at four equal parts. The four equal slots can avoid assembly interference caused by too high positioning accuracy. The four equal parts of the annular positioning disc 3 are provided with four positioning pads 2.

[0042] Four positioning pads 2 are used to replace one positioning surface, so as to more conveniently clean the positioning surface and increase the rigidity of the process system. Four stress points are arranged at the four sand removal openings, four clamping mechanisms 10 are arranged, the press rod bolt 4 is used to pressurize the connecting pieces, so that the friction force is generated between the connecting pieces, and the fastening purpose is achieved.

[0043] The press rod bolt 4 is sleeved with the supporting spring 9, so that the press rod 7 is retained at a reasonable position to be processed after the clamping force disappears.

[0044] The base 1 is provided with two rows of parallel four slots. The slots are used for inserting the locking bolts and rotating the nuts to fix the effective connection between the fixture and the machine tool.

[0045] The front end surface of the base 1 is a finished surface. The finished surface is used as a reference plane for the scribing disc to determine the installation direction of the processing air port end surface.

[0046] In the use of the cylinder head planer fixture, the cleaned cylinder head bottom surface stop circle alignment ring positioning disc 3 is dropped on four clean positioning pads 2 to complete the large plane short pin positioning. Gently shake the cylinder head to ensure accurate positioning, adjust the scribe needle on the scribe disc to a reasonable height and lock it, hold the scribe disc stand and place the base against the machining surface of the front end face of the fixture base 1, grind the rough surface of the air port end face to determine the installation direction of the part. The support spring 9 and the pressure rod 7 are sequentially sleeved on the pressure rod bolt 4, the front end protrusion of the pressure rod 7 is inserted into the sand outlet, and the rear end is pressed against the support block 8. The washer 6 and the hex nut 5 are sleeved, pre-tightened and then tightened with force to sequentially clamp the cylinder head with the four clamping mechanisms to complete the installation of the cylinder head on the fixture.

[0047] After milling is completed, the hex nut 5 is unscrewed in the reverse direction, the clamping force disappears, and the pressure rod 7 is separated from the force point. Due to the elastic force of the support spring 9, the pressure rod 7 is in a reasonable position for machining.

Claims

1. A line-free cylinder head planer fixture, characterized by, The application relates to a base (1) which is detachably fixed on a gantry milling machine, wherein an annular positioning disc (3) for positioning a cylinder cover is arranged on the base (1); an equal-height positioning pad (2) is arranged around the annular positioning disc (3) on the base (1); and a clamping mechanism (10) for connecting with a sand removal opening of the cylinder cover so as to clamp the cylinder cover is further arranged on the base (1). The clamping mechanism (10) comprises a supporting block (8) vertically arranged on the base (1) and a pressing rod (7) connected to the supporting block (8); a through groove with an axis perpendicular to the surface of the base (1) is arranged on the pressing rod (7); a pressing rod bolt (4) is arranged in the through groove; one end of the pressing rod bolt (4) is fixed on the base (1); a supporting spring (9) is arranged between the upper surface of the base (1) and the lower surface of the pressing rod (7); the supporting spring (9) is sleeved on the pressing rod bolt (4), the threaded end of the pressing rod bolt (4) penetrates through the through groove, a hexagonal nut (5) is matched with the thread of the pressing rod bolt (4); a gasket (6) is arranged between the hexagonal nut (5) and the upper surface of the pressing rod (7); one end of the pressing rod (7) is horizontally provided with a protruding part; the protruding part is inserted into the sand removal opening of the cylinder cover, and the cylinder cover is clamped through the clamping mechanism (10). Mounting notches are symmetrically arranged on the two side edges of the base (1) and used for inserting locking bolts to fix the clamp on the workbench of the gantry milling machine. A groove-shaped structure is arranged on the top of the side wall of the annular positioning disc (3) and used for avoiding assembly interference caused by excessively high positioning accuracy.

2. A cylinder head planer-type milling machine fixture without scribing according to claim 1, characterized in that, The equal-height positioning pad (2) has four equal-height positioning pads which are symmetrically arranged around the annular positioning disc (3) and are convenient for cleaning and positioning.

3. A cylinder head planer-type milling machine fixture without scribing according to claim 2, characterized in that, The clamping mechanism (10) is arranged at the corresponding position of the sand removal opening of the cylinder cover and has four clamping mechanisms.

4. A cylinder head planer-type milling machine fixture without scribing according to claim 3, characterized in that, The groove-shaped structures symmetrically arranged on the top of the side wall of the annular positioning disc (3) are four groove-shaped structures.

5. A cylinder head, portal milling machine clamp without scribing according to claim 4, characterized in that, The mounting notches of the base (1) are symmetrically and parallelly arranged on the two side edges of the base (1) and have four mounting notches.

6. A cylinder head, portal milling machine clamp without scribing according to claim 4, characterized in that, The pressing rod (7) is a strip-shaped cubic structure.

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