CN1212905C

CN1212905C - Method for pressing valve gate piece and its necessary mould

Info

Publication number: CN1212905C
Application number: CN 02145037
Authority: CN
Inventors: 殷宏祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-31
Filing date: 2002-10-31
Publication date: 2005-08-03
Anticipated expiration: 2022-10-31
Also published as: CN1405434A

Abstract

The present invention relates to a method and a needed mould for pressing a valve locking block. Firstly, a profiled strip is made into a needed section bar in the mode of pulling; secondly, the section bar is cut into blanks; thirdly, the blanks are put in a full closed forming mould to form a semi-product; and finally, the semi-product is placed in a shaping mould to form the valve locking block in the mode of shaping. In the shaping mould, the length of both ends of a positioning slot of the upper part of a concave mould is equal to the axial length of the blanks and the length of a chute so that a convex mould and the blanks just fall into the chute in the mode of correct placement at the time of shaping, an upper punch is arranged on an upper mould frame of the shaping mould, and the shaping concave mould is fixed on a lower mould frame. When shaping is carried out by the shaping mould, the end surface and the two semicircular planes of the blanks are respectively pressed by both ends of the chute and the step of the convex mould, the finished size of the valve locking block is assured, so the procedures are simplified; the production cost and the raw material consumption are reduced, and simultaneously, the mechanical properties and the service life of the product are assured. In addition, the adoption of the shaping mould with the upper punch causes the operation to be safe.

Description

The method of compacting valve lock dog and die needed

Technical field

The present invention relates to a kind of method of making the valve lock dog and die needed.

Background technique

The valve lock dog is most important in the engine air door assembly, it directly has influence on the valve clearance with cooperating of the valve spring seat of honour, valve stem, the stable complete machine quality that more is directly connected to motor of its quality, and tradition processing valve lock dog adopts metal cutting mostly, and feed consumption is many on the one hand for this method, and stock utilization only is between 15%～25%, operation is many on the other hand, the difficult control of dimensional accuracy, and surface roughness is difficult to reach technical requirements, thus can't guarantee the quality of product.Even some enterprise adopts cold-extrusion shaping, because operation is more, cost is higher, is difficult to reach the quality requirement of external like product, and because of being subjected to the restriction of factors such as technology, equipment, the design of general section bar also has nothing in common with each other, and therefore, processing differences is very big.Recently, existing a kind of method and die needed being devised thereof of adopting pressing mode to make the valve lock dog, its manufacture method is the pull-up material of elder generation, blanking, the shaping of bending, make blank, blank is put into shaping mould be shaped to semi-finished product, again with semi-finished product turner slitter edge, chamfering, the flat surface grinding, its shaping is to adopt the forming die that bends to be shaped, and shaping mould adopts the below of setting a roof beam in place to be fixed with push rod and correcting die, have a protruding core of shoulder at least and the one end is installed on setting a roof beam in place down, by on set a roof beam in place to move downward and drive the push rod extruding and place the blank that is wrapped in around the core to form.Though the method has been eliminated refrigeration extrusion die cost height, the drawback that die life is short, but find in process of production, because with the pull-up material of material, blanking, so when the forming die shaping is bended in employing, must make in the forming die punch cooperate the back gapped with the shaping die, otherwise the billet size after can't guaranteeing to be shaped, this makes the blank periphery after being shaped that slitter edge all be arranged, and semicircle two planes that still needing to cause the grinding valve collet, turning, chamfering both ends of the surface etc. are so technology is still very complicated, cause manufacturing efficiency lower, and after turner, also can't guarantee consistency of product; In addition, its shaping mould that adopts is installed on correcting die on the roof beam structure, and when shaping, distance continuously between the upper and lower beam when like this operator being installed workpiece, if accidentally, will make the finger that injures operator, thereby very unsafe.

Summary of the invention

First technical problem to be solved by this invention is to overcome above-mentioned defective, provides that a kind of technology is simple, manufacturing efficiency is high and the method for the compacting valve lock dog of constant product quality.

Second technical problem to be solved by this invention is to overcome above-mentioned defective, and a kind of totally-enclosed forming die is provided, and both do not had the technology slitter edge by the semi-finished product after this forming die processing, also need not the grinding plane, all once is shaped on mould.

The 3rd technical problem to be solved by this invention is to overcome above-mentioned defective, provides a kind of Security good shaping mould.

The present invention solves the technological scheme that above-mentioned first technical problem adopts:

1. according to the requirement of valve lock dog, profiled strip is drawn into required section bar;

2. the profiled strip section bar is cut into required blank;

3. above-mentioned blank is placed in the die locating slot of the two ends length forming die identical with the blank axial length, then make and have the punch that matches with valve lock dog internal diameter shape and semicircle two planes in the described forming die and move downward, blank in the locating slot is pressed into the skewed slot that is positioned at the locating slot bottom and is just joining mutually with above-mentioned punch, and extrusion moulding makes semi-finished product;

Two semi-finished product that 4. will make are put into around the shaping mandrel of die of shaping mould, have with the match upper punch of recess of shaping mandrel upper end and move downward, two semi-finished product are close in the die cavity in the correcting die, to finish the shaping of valve lock dog male cone (strobilus masculinus), two valve lock dogs hug the shaping mandrel simultaneously, finish putting in place of internal diameter physical dimension.

The present invention solves above-mentioned second technological scheme that technical problem adopted: it comprises mould bases, punch, die and push rod, described mould bases comprise again by guide pillars and bushes be connected on, following mould bases, described protruding, die is respectively by fastening piece and last, following mould bases fixes, the spring of described push rod mould bases by the die center hole and under being positioned at offsets, under the spring nature, described push rod has the trend that semi-finished product eject in the die that makes, the internal diameter shape of described punch lower end profile and valve lock dog matches, and be provided with the step that matches with lock dog semicircle two planes, described die top is provided with the locating slot that can hold above-mentioned blank, it is characterized in that: be provided with skewed slot suitable with valve lock dog profile and that just joining mutually with above-mentioned punch in the bottom of described locating slot, the two ends length of described locating slot just in time with the axial length of blank, the equal in length of skewed slot, make when being shaped punch, blank drops in the above-mentioned skewed slot with just in time just joining.

Can be provided with the compensator or trimmer pressure cushion block between described punch and the top mold frame.

Be equipped with on the described top mold frame and the outside unsteady die shank that is connected.

The present invention solves above-mentioned the 3rd technological scheme that technical problem adopted: this sizing die comprises mould bases, correcting die, push rod and shaping mandrel, described mould bases comprise again by guide pillars and bushes be connected on, following mould bases, be provided with the die cavity that matches with valve lock dog profile in described correcting die center, described cavity bottom is provided with through hole, the shaping mandrel suitable with valve lock dog internal diameter shape offsets by above-mentioned through hole and the push rod that is positioned at through hole, it is characterized in that: on described, fixedly upper punch and above-mentioned correcting die respectively on the following mould bases are provided with the recess that matches with shaping mandrel upper end in the described upper punch lower end surface; Then the multiple resilience spring of mould bases offsets the other end of described push rod with being positioned at down, and under the spring nature, described push rod and shaping mandrel have the trend to the upper punch side shifting.

Can be provided with buffering upward pressure cushion block between described upper punch and the top mold frame.

Can be provided with buffering downforce cushion block between described correcting die and the following mould bases.

Compared with prior art, the invention has the advantages that: because locating slot length equates with charge length and chute length in the forming die, and punch is just joined mutually with the skewed slot in the shaping die, so both ends of the surface when being shaped with the profiled strip section bar and semicircle two planes are subjected to the compacting of skewed slot two ends and punch step respectively, guaranteed the last size of valve lock dog, so the semi-finished product that make do not have the technology slitter edge, and need not to carry out again grinding semicircle two planes and turning and chamfering both ends of the surface, thereby simplified operation, reduce cost of production and raw material loss, guaranteed mechanical performance of products and working life simultaneously.Adopt the shaping mould of band upper punch in addition, correcting die is positioned over down on the mould bases, during shaping, owing to upper punch has spacing, during operator's place work piece, both made misoperation like this between top mold frame and the following mould bases, also can not hinder the hitter and refer to, so comparison safety.

Description of drawings

Fig. 1 is the structural representation of required forming die in the embodiment of the invention;

Fig. 2 is the structural representation of required shaping mould in the embodiment of the invention.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Forming die of the present invention as shown in Figure 1, it comprises mould bases, punch 6, shaping die 7 and push rod 8, described mould bases comprises the upper and

lower mould bases

12,10 that is connected with guide pin bushing by guide pillar 13 again, described top mold frame 12 is connected with press machine by the die shank that floats, and the die shank that floats is made up of die shank 1, sphere cushion block 2 and punch set 3 routinely; Described punch 6 is by patrix cushion block 4 and be bolted on the top mold frame 12, and shaping die 7 fixes by bolt and following mould bases 10, in order to relax the hyperpressure that transmits from punch 6,, between patrix cushion block 5 and top mold frame 12, be provided with compensator or trimmer pressure cushion block 4 to prevent to damage top mold frame 12.Described punch 6 lower end profiles are consistent with the internal diameter shape of valve lock dog, and be provided with the plane step 26 on compacting lock dog semicircle two planes, described die 7 tops are provided with the locating slot 11 that can hold blank, be provided with skewed slot 14 suitable and that just joining with above-mentioned punch 6 with valve lock dog profile in the center of described locating slot 11, the two ends length of described locating slot 11 just in time with the axial length of blank, the equal in length of skewed slot 14, make that punch 6, blank drop in the above-mentioned skewed slot 14 with just in time just joining when being shaped; Described skewed slot 14 bottoms are provided with center hole, and the spring 9 of described push rod 8 mould bases 10 by described center hole and under being positioned at offsets, and makes push rod 8 have and makes the trend that semi-finished product 15 eject in the die 7.

Shaping mould of the present invention as shown in Figure 2, it comprises mould bases, correcting die 24, push rod 8 and shaping mandrel 19, described mould bases comprises the upper and

lower mould bases

12,10 that is connected by guide pillars and bushes again, described top mold frame 12 also adopts aforesaid way with being connected of press machine, promptly be connected with press machine, and the die shank that floats is made up of die shank 1, sphere cushion block 2 and punch set 3 routinely by the die shank that floats; Described top mold frame 12 is fixed with upper punch 18 by upper punch cushion block 17, and with bolt correcting die 24 is arranged on the mould bases 10 down, in order to relax the hyperpressure that transmits from upper punch 18 and correcting die 24, to prevent to damage upper and

lower mould bases

12,10, between upper punch cushion block 17 and top mold frame 12, be provided with upward pressure cushion block 16, and between correcting die 24 and following mould bases 10, also be provided with downforce cushion block 20 through hardening through hardening; Described upper punch is provided with the recess 21 that matches with shaping mandrel 19 upper ends in 18 lower end surfaces; Be provided with the die cavity 23 that faces with above-mentioned upper punch 18 and match with required valve lock dog profile in described correcting die 24 centers, described die cavity 23 bottoms are provided with through hole, the shaping mandrel 19 suitable with valve lock dog internal diameter shape offsets by above-mentioned through hole and the push rod 8 that is positioned at through hole, then the multiple resilience spring 25 of mould bases 10 offsets the other end of push rod 8 with being positioned at down, makes described push rod 8 and shaping mandrel 19 have the trend to upper punch 18 side shiftings.In the present embodiment, only be provided with a reentrant part on the shaping mandrel 19, also can as required a plurality of reentrant part be set, with the internal diameter of valve lock dog in bump match.

It is as follows to adopt above-mentioned forming die and shaping mould to suppress the process of valve lock dog: 1. according to the technical requirements of valve lock dog, profiled strip is drawn into required section bar; 2. the profiled strip section bar is cut into required blank, the size of this blank is the development size of valve lock dog; 3. place above-mentioned blank totally-enclosed forming die internal shaping to make semi-finished product, be that the top mold frame 12 of above-mentioned forming die is when being in top dead center, punch 6 is separated with shaping die 7, this moment blank is put into the locating slot 11 of shaping die 7, under the effect of top mold frame 12 at machinery, make top mold frame 12, pressure cushion block 4 and punch 6 move vertically downward along guide pillar 13, punch 6 is pressed into the blank in the locating slot 11 in the skewed slot 14, extrusion moulding, under the effect of machinery, top mold frame 12 drives punch 6 and moves to top dead center then, and push rod 8 is subjected to the elastic force effect of spring 9 simultaneously, semi-finished product 15 after the pushing extruding make semi-finished product 15 break away from shaping die 7; 4. at last the semi-finished product 15 that make are put into shaping mould and be shaped to valve lock dog 23, promptly when the top mold frame 12 of shaping mould is in top dead center, upper punch 18 is separated with shaping mandrel 19, this moment, two semi-finished product were put into around the shaping mandrel 19 of correcting die 24, under the effect of top mold frame 12 at machinery, make top mold frame 12, upward pressure cushion block 16 and upper punch 18 move vertically downward along guide pillar, make two semi-finished product be close to the shaping that correcting die 24 interior die cavities 23 are finished valve lock dog 22 male cone (strobilus masculinus)s, make two valve lock dogs 22 hug shaping mandrel 19 simultaneously, to finish putting in place of internal diameter physical dimension, then under the effect of machinery, top mold frame 12 drives upper punch 18 and returns, when moving to top dead center, because the elastic force effect of multiple resilience spring 25, push rod 8 is resetted, impel shaping mandrel 19 to move up, thereby eject two valve lock dogs 22 promptly.

Claims

1, a kind of method of suppressing the valve lock dog is characterized in that: 1. according to the requirement of valve lock dog, profiled strip is drawn into required section bar; 2. the profiled strip section bar is cut into required blank; 3. above-mentioned blank is placed in die (7) locating slot (11) of the two ends length forming die identical with the blank axial length, then make and have the punch (6) that matches with valve lock dog internal diameter shape and semicircle two planes in the described forming die and move downward, blank in the locating slot (11) is pressed into the skewed slot (14) that is positioned at the locating slot bottom and is just joining mutually with above-mentioned punch (6), and extrusion moulding makes semi-finished product; Two semi-finished product that 4. will make put into shaping mould die (24) shaping mandrel (19) on every side, have with the match upper punch (18) of recess (21) of shaping mandrel (19) upper end and move downward, two semi-finished product are close in the interior die cavity (23) of correcting die (24), to finish the shaping of valve lock dog (22) male cone (strobilus masculinus), two valve lock dogs (22) hug shaping mandrel (19) simultaneously, finish putting in place of internal diameter physical dimension.

2, a kind of forming die that is used for the described method of claim 1, it comprises mould bases, punch (6), die (7) and push rod (8), described mould bases comprise again by guide pillar (13) be connected with guide pin bushing on, following mould bases (12), (10), described protruding, die is respectively by fastening piece and last, following mould bases fixes, the spring (9) of described push rod (8) mould bases (10) by die (7) center hole and under being positioned at offsets, under spring (9) nature, described push rod (8) has the trend that semi-finished product (15) eject in the die (7) that makes, the internal diameter shape of described punch (6) lower end profile and valve lock dog matches, and be provided with the step (26) that matches with lock dog semicircle two planes, described die (7) top is provided with the locating slot (11) that can hold above-mentioned blank, it is characterized in that: be provided with skewed slot (14) suitable with valve lock dog profile and that just joining mutually with above-mentioned punch (6) in the bottom of described locating slot (11), the two ends length of described locating slot (11) just in time with the axial length of blank, the equal in length of skewed slot (14), make when being shaped punch (6), blank drops in the above-mentioned skewed slot (14) with just in time just joining.

3, forming die according to claim 2 is characterized in that: be provided with compensator or trimmer pressure cushion block (4) between described punch (6) and the top mold frame (12).

4, according to claim 2 or 3 described forming die, it is characterized in that: be equipped with on the described top mold frame (12) and the outside unsteady die shank that is connected.

5, a kind of shaping mould that is used for the described method of claim 1, it comprises mould bases, correcting die (24), push rod (8) and shaping mandrel (19), described mould bases comprise again by guide pillars and bushes be connected on, following mould bases (12), (10), be provided with the die cavity (23) that matches with valve lock dog profile in described correcting die (24) center, described die cavity (23) bottom is provided with through hole, the shaping mandrel (19) suitable with valve lock dog internal diameter shape offsets by above-mentioned through hole and the push rod (8) that is positioned at through hole, it is characterized in that: on described, fixedly upper punch (18) and above-mentioned correcting die (24) respectively on the following mould bases are provided with the recess (21) that matches with shaping mandrel (19) upper end in described upper punch (18) lower end surface; Then the multiple resilience spring (25) of mould bases (10) offsets the other end of described push rod (8) with being positioned at down, and under multiple resilience spring (25) nature, described push rod (8) and shaping mandrel (19) have the trend to upper punch (18) side shifting.

6, shaping mould according to claim 5 is characterized in that: be provided with buffering upward pressure cushion block (16) between described upper punch (18) and the top mold frame (12).

7, shaping mould according to claim 5 is characterized in that: also be provided with buffering downforce cushion block (20) between described correcting die (24) and the following mould bases (10).

8, according to claim 5 or 6 or 7 described shaping moulds, it is characterized in that: be equipped with on the described top mold frame (12) and the outside unsteady die shank that is connected.