CN112518250B - Method for machining closing locking block - Google Patents
Method for machining closing locking block Download PDFInfo
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- CN112518250B CN112518250B CN202011356881.2A CN202011356881A CN112518250B CN 112518250 B CN112518250 B CN 112518250B CN 202011356881 A CN202011356881 A CN 202011356881A CN 112518250 B CN112518250 B CN 112518250B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a method for processing a closing lock block, which relates to the field of lock block processing, wherein the closing lock block comprises a first side edge and a second side edge, and the first side edge and the second side edge are in transition through a right-angle edge; the method for processing the closing locking block comprises the following steps: jumping and fine blanking: firstly punching a positioning nail hole and a special-shaped hole; positioning the positioning nail holes, punching waist circular holes, synchronously punching a first small hole, a second small hole and a large hole, dropping the shape to obtain a blank and deburring; grinding right-angle edges: clamping a deburred blank on a grinding clamp, and then placing the blank on a precise surface grinding machine for grinding to obtain a semi-finished product; removing burrs generated by grinding of the semi-finished product by using an automatic brushing machine; checking the waist round hole, the first small hole, the second small hole and the large hole of the semi-finished product by using a plug gauge, and correcting the hole opening by using a file if the hole opening is bruised or burred; and carrying out heat treatment and surface treatment on the semi-finished product. The invention can improve the processing efficiency and consistency and reduce the processing cost.
Description
Technical Field
The invention relates to the field of lock block processing, in particular to a method for processing a closed lock block.
Background
The closing locking block is not only an internal structural part of a vehicle control switch, but also a functional part, the opening and closing of the closing locking block is a control part of a vehicle door switch, the functional region of the closing locking block is a straight edge region at a sharp corner, the radius of an arc where the region is located is R0.1, if the radius size is increased, the buckling amount can be directly reduced, the risk that a mechanism can not be kept when a brake is closed and opened exists, and further potential safety hazards are brought.
Meanwhile, the size of the closing locking block is small, and fine blanking is difficult to directly adopt, so that straight edge grinding machining is mainly adopted at present, but the length of the straight edge is short, the grinding efficiency of a single part is low, the size accuracy is difficult to guarantee, the consistency is poor, the qualified rate is low, and the cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for processing a closing locking block, which can improve the processing efficiency and consistency and reduce the processing cost.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a method for processing a closing lock block comprises a lock body, wherein the lock body comprises a first side edge and a second side edge, the first side edge and the second side edge are in transition through a right-angle edge, the right-angle edge is a functional area, and a first small hole, a large hole, a second small hole and a waist round hole are sequentially arranged on the lock body;
the method for processing the closing locking block comprises the following steps:
s1, jumping and fine blanking: firstly punching a positioning nail hole and a special-shaped hole; positioning the positioning nail holes, punching waist circular holes, synchronously punching a first small hole, a second small hole and a large hole, and dropping the shape to obtain a blank piece;
s2, deburring, namely placing the blank on a brushing machine to automatically deburr;
s3, grinding right-angle edges: clamping a deburred blank on a grinding clamp, and then placing the blank on a precise surface grinding machine for grinding to obtain a semi-finished product;
the grinding clamp comprises a bottom plate, wherein a first side plate and a second side plate are arranged on the bottom plate, the first side plate and the second side plate are arranged oppositely, a plurality of blank pieces are accommodated between the first side plate and the second side plate, a first positioning pin and a second positioning pin are further arranged on the bottom plate, the first positioning pin is used for being inserted into a first small hole, and the second positioning pin is used for being inserted into a large hole;
s4, brushing: removing burrs generated by grinding of the semi-finished product by using an automatic brushing machine;
s5, checking, namely checking the upper waist round hole, the first small hole, the second small hole and the large hole of the semi-finished product by using a plug gauge, and correcting the hole opening by using a file if the hole opening has bruises and burrs;
s6, carrying out heat treatment on the semi-finished product by using a multipurpose furnace or a mesh belt furnace;
and S7, surface treatment.
Further, the grinding process comprises the following specific steps:
a. placing the grinding fixture on a base plate of a precision surface grinding machine, and positioning by magnetic adsorption;
b. clamping a part to be processed on a blank piece, placing a plurality of blank pieces between a first side plate and a second side plate, and positioning and fixing through a first positioning pin and a second positioning pin;
c. and taking the upper end surface of the grinding fixture as a reference surface, grinding the right angle of the blank until the height between the right angle and the reference surface is d =12.97 +/-0.015, and grinding a right-angle side at the right angle.
Further, step c is followed by the steps of:
the upper end face of the grinding fixture is used as a reference face, a height gauge is used for detecting the height of a ground right-angle side relative to the reference face to be d =12.97 +/-0.015 mm, three-coordinate detection is used for detecting the position degree in the first detection, and if the part is qualified, the height gauge is used for the subsequent routing inspection, and the dial indicator is used for detecting the part; and if the dimension is not qualified, the grinding fixture is overhauled again, the distance a from the upper end face to the center of the large hole is measured, and the dimension D is recalculated (D = D-a).
Further, the grinding fixture needs to be overhauled again before each grinding process, the first inspection of each batch needs to use three-dimensional detection, the height gauge can be used for detection after the blank is qualified, the blank needs to be detected after the part is clamped when the roughness is detected, and the step a is carried out after the first inspection size is completely qualified.
Further, in step S6, the semi-finished product is heat-treated by using a multi-purpose furnace or a mesh belt furnace, and the heat treatment technical indexes achieved by the method are as follows: the effective hardening layer depth CHD550HV0.25-0.35, the surface hardness HV5650-750 and the core hardness HV5320-450.
Further, step S7 specifically includes the following steps: the surface is sprayed with Dacromet or Jiumett, and then is coated with PTFE to obtain a finished product of the closing locking block.
Further, the closed lock block finished product is subjected to a salt spray test, after 72 hours, the black rust/white rust on the surface of the closed lock block finished product is not more than 5% of the total area of the closed lock block finished product, and after 120 hours, no red rust appears on the surface of the closed lock block finished product.
Furthermore, the radius of the arc where the right-angle side is located is 0.1mm, the tolerance is +0.2/-0.1, and the position degree is 0.04mm.
Compared with the prior art, the invention has the advantages that:
(1) According to the method for processing and closing the lock block, the lock block is obtained by combining the jumping fine blanking with the grinding processing, and as the surface roughness of the lock block is 0.4, the radius of a right-angle edge is 0.1mm, and the tolerance is +/-0.1 mm, the hardness of a conventional punch is difficult to meet the requirement and is easy to damage, and meanwhile, the right-angle edge is also torn; and use the mode of grinding to process the right angle limit, use a plurality of blank of grinding anchor clamps centre gripping once to process when the grinding, can effectively improve machining efficiency, simultaneously, avoided processing blank at every turn, cutter feed and withdraw of a knife have guaranteed the uniformity and the stability of processing product to the influence of size precision and the influence of cutter life-span when switching the part.
(2) According to the method for processing the closed locking block, the upper end face of the grinding fixture is used as a reference face, in the grinding process, the height d =12.97 +/-0.015 mm of the ground right-angle side relative to the reference face is detected by using the height gauge, the requirement is met, the problem that the precision is poor due to the fact that the center of a large hole is used as the reference face and the measurement is difficult is solved, and the yield of the closed locking block obtained by the method is high.
Drawings
FIG. 1 is a schematic structural diagram of a closing lock according to an embodiment of the present invention;
FIG. 2 is a layout diagram of the skip-step fine blanking according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a grinding fixture in cooperation with a blank member according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of fig. 3.
In the figure: 1-a lock body, 2-a first side edge, 3-a second side edge, 4-a right-angle edge, 5-a first small hole, 6-a large hole, 7-a second small hole, 8-a waist round hole, 9-a positioning nail hole, 10-a special-shaped hole, 11-a blank piece, 12-a grinding clamp, 121-a bottom plate, 122-a first side plate, 123-a second side plate, 124-a first positioning pin, 125-a second positioning pin, 126-a first pin, 127-a second pin and 128-an upper end surface.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a method for processing a closing lock block, wherein the closing lock block is a medium-thickness fine punching piece with a thickness of 5mm and is made of 16MnCr5.
Close the locking piece and include lock body 1, lock body 1 includes first side 2 and second side 3, pass through right-angle side 4 transition between first side 2 and the second side 3, right-angle side 4 is the functional area, the radius of right-angle side 4 place circular arc is 0.1mm, and the tolerance is +0.2/-0.1, and the position degree is 0.04mm, is provided with first aperture 5, macropore 6, second aperture 7 and waist circle hole 8 on the lock body 1 in order.
The method for processing the closing locking block comprises the following steps:
s1, jumping and fine blanking: referring to fig. 2, a positioning nail hole 9 and a special-shaped hole 10 are punched firstly; positioning the positioning nail holes 9, punching waist round holes 8, synchronously punching a first small hole 5, a second small hole 7 and a large hole 6, and obtaining a blank piece 11.
And S2, deburring, namely placing the blank piece 11 on a brushing machine for automatic deburring.
S3, grinding straight edges
The position of dysmorphism hole 10 is corresponding with right-angle side 4, but because the position that corresponds after the dysmorphism hole 10 fine blanking is the arc, consequently, need carry out abrasive machining with corresponding part and obtain right-angle side 4, the blank 11 centre gripping after the burring is at first on grinding anchor clamps 12, then places and carries out abrasive machining on accurate flat grinder, obtains semi-manufactured goods.
The grinding clamp 12 comprises a bottom plate 121, a first side plate 122 and a second side plate 123 are arranged on the bottom plate 121, the first side plate 122 and the second side plate 123 are arranged oppositely, a plurality of blank pieces 11 are accommodated between the first side plate 122 and the second side plate 123, a first positioning pin 124 and a second positioning pin 125 are further arranged on the bottom plate 121, the first positioning pin 124 is used for being inserted into the first small hole 5, the second positioning pin 125 is used for being inserted into the large hole 6, and the grinding clamp 12 further comprises a first pin 126 and a second pin 127.
In use, the blank member 11 is fixed by the first positioning pin 124 and the second positioning pin 125, and as shown in fig. 3, the theoretical dimension D =47.77mm to be ground is set to the large hole 6 as a reference during grinding, but the large hole 6 is blocked by the grinding jig 12 and is difficult to detect in real time during grinding, and therefore the reference is set to the upper end surface 128 of the jig, that is, the top of the first side plate 122 and the second side plate 123.
Taking the upper end face 128 of the grinding fixture 12 as a reference face, detecting the height of the ground right-angle side 4 relative to the reference face by using a height gauge, wherein the height d =12.97 +/-0.015 mm, detecting the position degree by using three coordinates for the first detection, and if the part is qualified, using the height gauge for the subsequent routing inspection and detecting by using a dial indicator; if the dimension D is not qualified, the grinding clamp 12 is overhauled again, the distance a from the upper end face 128 to the center of the large hole 6 is measured, and the dimension D = D-a is recalculated.
The grinding process comprises the following specific steps:
a. the grinding jig 12 is placed on the base plate of the precision surface grinding machine and positioned by magnetic adsorption.
b. The blank 11 is clamped with the part to be processed, a plurality of blanks 11 are placed between the first side plate 122 and the second side plate 123, and are positioned and fixed by the first positioning pin 124 and the second positioning pin 125.
c. The right angle of the blank member 11 is ground to a height d =12.97 ± 0.015 from the reference surface with the upper end surface 128 of the grinding jig 12 as the reference surface, and at this time, the right angle is ground to have the square 4.
Because the blank 11 has changed the benchmark, all need to overhaul again before every batch of grinding and grind anchor clamps 12, every batch of first inspection need use three-dimensional to detect, just can use the tongue to detect after qualified, when blank 11 detects the roughness, also need detect after the part clamping, can carry out follow-up processing after waiting that the first inspection size is all qualified.
S4, brushing: and removing burrs generated by grinding of the semi-finished product by using an automatic brushing machine.
And S5, checking, namely checking the upper waist round hole 8, the first small hole 5, the second small hole 7 and the large hole 6 of the semi-finished product by using a plug gauge, and correcting by using a file if the hole openings have bruises and burrs.
S6, carrying out heat treatment on the semi-finished product by using a multi-purpose furnace or a mesh-belt furnace, wherein the raw material of the embodiment is 16MnCr5, the material has better hardenability and machinability, the heat treatment is a carbonitriding heat treatment mode, the wear resistance of the surface of the blank 11 is improved, the core part is kept to have good toughness, and the heat treatment technical indexes are as follows: the effective hardened layer depth CHD550HV0.25-0.35, the surface hardness HV5650-750, the core hardness HV5320-450
S7, surface treatment
Because during the in-service use, the surface of part is for closing locking piece function user plane, consequently, requires that the surface has better wearability, and it includes to carry out surface treatment to the semi-manufactured goods: the method comprises the steps of firstly spraying Dacromet or Jiumett on the surface of a part, then coating PTFEPoly tetra fluoroethylene and polytetrafluoroethylene to obtain a finished product of the closing lock block, wherein the surface of the finished product of the closing lock block after coating is gray or black, and the coating is uniform, free of exposed white, free of bubbles and free of cracks.
And performing a salt spray test on the closed lock block finished product, wherein the black rust/white rust on the surface of the part after 72 hours is not more than 5 percent of the total area of the part, and the surface of the part has no red rust after 120 hours.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone with the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, are within the protection scope.
Claims (8)
1. A method of manufacturing a closure locking piece, comprising: the closing lock block comprises a lock body (1), the lock body (1) comprises a first side edge (2) and a second side edge (3), the first side edge (2) and the second side edge (3) are in transition through a right-angle edge (4), the right-angle edge (4) is a functional area, and a first small hole (5), a large hole (6), a second small hole (7) and a waist circular hole (8) are sequentially arranged on the lock body (1);
the method for processing the closing locking block comprises the following steps:
s1, jumping fine blanking: firstly punching a positioning nail hole (9) and a special-shaped hole (10); positioning the positioning nail hole (9), punching a waist round hole (8), synchronously punching a first small hole (5), a second small hole (7) and a large hole (6) in sequence, and falling the shape to obtain a blank piece (11);
s2, deburring, namely placing the blank (11) on a brushing machine for automatically deburring;
s3, grinding right-angle edges (4): clamping a deburred blank (11) on a grinding clamp (12), and then placing the blank on a precise surface grinding machine for grinding to obtain a semi-finished product;
the grinding clamp (12) comprises a bottom plate (121), wherein a first side plate (122) and a second side plate (123) are arranged on the bottom plate (121), the first side plate (122) and the second side plate (123) are oppositely arranged, a plurality of blank pieces (11) are accommodated between the first side plate (122) and the second side plate (123), a first positioning pin (124) and a second positioning pin (125) are further arranged on the bottom plate (121), the first positioning pin (124) is used for being inserted into the first small hole (5), and the second positioning pin (125) is used for being inserted into the large hole (6);
s4, brushing: removing burrs generated by grinding of the semi-finished product by using an automatic brushing machine;
s5, checking, namely checking the upper waist round hole (8), the first small hole (5), the second small hole (7) and the large hole (6) of the semi-finished product by using a plug gauge, and if the hole openings have bruises and burrs, correcting by using a file;
s6, carrying out heat treatment on the semi-finished product by using a multipurpose furnace or a mesh belt furnace;
s7, surface treatment;
wherein, the step of step S3 further comprises:
a. placing the grinding clamp (12) on a bottom plate of a precision surface grinding machine, and positioning by magnetic adsorption;
b. the machining method comprises the steps of clamping parts to be machined on blank pieces (11), placing a plurality of blank pieces (11) between a first side plate (122) and a second side plate (123), and positioning and fixing through a first positioning pin (124) and a second positioning pin (125).
2. The method of machining a closure block of claim 1, wherein: the step S3 further includes the steps of:
c. the right angle of the blank (11) is ground by taking the upper end surface (128) of the grinding clamp (12) as a reference surface until the height d =12.97 +/-0.015 from the reference surface, and at the moment, a right-angle side (4) is ground at the right angle.
3. The method of machining a closure lock as claimed in claim 2, wherein: the step c is followed by the following steps:
the upper end face (128) of the grinding fixture (12) is used as a reference face, a height gauge is used for detecting the height of a ground right-angle side (4) relative to the reference face to be d =12.97 +/-0.015 mm, three-coordinate detection is used for detecting the position degree in the first detection, if the part is qualified, the height gauge is used in the subsequent routing inspection, and the dial indicator is used for detecting the part; if not, the grinding fixture (12) is overhauled again, the distance a from the upper end face (128) to the center of the large hole (6) is measured, and the size d is calculated again;
wherein D = D-a, and D is a theoretical size of grinding.
4. The method of manufacturing a closure lock as set forth in claim 1, wherein: the grinding fixture (12) needs to be overhauled again before grinding at each time, each batch of first inspection needs to use three-dimensional detection, the height gauge can be used for detection after the blank is qualified, when the blank (11) detects the roughness, the part needs to be clamped and detected, and the step a is shifted to after the first inspection sizes are all qualified.
5. The method of manufacturing a closure lock as set forth in claim 1, wherein: in the step S6, the semi-finished product is subjected to heat treatment by using a multi-purpose furnace or a mesh belt furnace, and the heat treatment technical indexes are as follows: the effective hardening layer depth CHD550HV0.25-0.35, the surface hardness HV5650-750, and the core hardness HV5320-450.
6. The method of manufacturing a closure lock as set forth in claim 1, wherein: step S7 specifically includes the following steps: spraying Dacromet or Jiumett on the surface, and then coating PTFE to obtain a finished product of the closing lock block.
7. The method of manufacturing a closure lock as set forth in claim 6, wherein: and performing a salt spray test on the closed lock block finished product, wherein the black rust/white rust on the surface of the closed lock block finished product after 72 hours is not more than 5 percent of the total area of the closed lock block finished product, and no red rust appears on the surface of the closed lock block finished product after 120 hours.
8. The method of machining a closure block of claim 1, wherein: the radius of the circular arc where the right-angle side (4) is located is 0.1mm, the tolerance is +0.2/-0.1, and the position degree is 0.04mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356881.2A CN112518250B (en) | 2020-11-27 | 2020-11-27 | Method for machining closing locking block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011356881.2A CN112518250B (en) | 2020-11-27 | 2020-11-27 | Method for machining closing locking block |
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| Publication Number | Publication Date |
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| CN112518250A CN112518250A (en) | 2021-03-19 |
| CN112518250B true CN112518250B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011356881.2A Active CN112518250B (en) | 2020-11-27 | 2020-11-27 | Method for machining closing locking block |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2788549B1 (en) * | 1999-01-18 | 2001-03-09 | Coutier Moulage Gen Ind | LOCK FOR AUTOMOTIVE EQUIPMENT SUCH AS A LATCH FOR A DOOR, TRUNK OR FOLDING SEAT BACK |
| JP3640590B2 (en) * | 2000-03-24 | 2005-04-20 | 株式会社ホンダロック | Vehicle door lock device |
| DE202005020452U1 (en) * | 2005-12-29 | 2007-05-16 | Kiekert Ag | Motor vehicle door lock |
| CN102528595B (en) * | 2012-01-11 | 2013-12-25 | 宁波数泰信息科技有限公司 | Lock polisher |
| CN108080897B (en) * | 2017-12-16 | 2019-11-01 | 武汉华夏精冲技术有限公司 | A kind of low-intensity Thick Plate Fine stamping manufacturing process with counterbore and elongated blind hole |
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2020
- 2020-11-27 CN CN202011356881.2A patent/CN112518250B/en active Active
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